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Lukas Krasauskas (Stockholm University)Talk
MATS (Mesospheric airglow/Aerosol Tomography and Spectroscopy) is a Swedish satellite launched in November 2022. It is a limb imager that observes $\mathrm{O_2}$ A-band airglow (four different spectral channels) in near-infrared and UV light scattered from noctilucent clouds (two channels) in the 70 km to 110 km altitude range. The airglow observations can be used to obtain a 3-D tomographic...
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Michael Himes (Morgan State University, NASA Goddard Space Flight Center)Talk
Stratospheric water vapor (SWV) plays an important role in atmospheric chemistry and dynamics. The Aura Microwave Limb Sounder (MLS) instrument has provided a daily near-global record of SWV for around two decades. After the Aura mission ends later this year, SWV measurements will be mostly limited to occultation measurements by the Stratospheric Aerosol and Gas Experiment III (SAGE III) and...
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Alexey Rozanov (University of Bremen)Talk
Stratospheric aerosols play a major role in determining the radiative budget of the Earth’s atmosphere. They cool the troposphere by scattering the incident solar radiation back to space and warm the stratosphere by absorbing upwelling thermal radiation. Furthermore, mainly in polar regions, stratospheric aerosol particles serve as condensation nuclei to build PSC particles. Heterogeneous...
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Christine Pohl (Institute of Environmental Studies, University of Bremen, Germany)Talk
Due to its long time series and dense spatial coverage, the aerosol extinction coefficient (Ext) obtained from OMPS limb scattering observations is a valuable data record for observing the temporal aerosol evolution in the stratosphere after strong volcanic eruptions and wildfires. The OMPS limb scattering data set is a promising candidate for use in GLOSSAC and already used in CREST climate...
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Christian Löns (University of Greifswald)Talk
The stratospheric polar vortex varies in strength and spatial characteristics during winter in the Northern Hemisphere. If the polar vortex is shifted towards the equator as a result of breaking planetary waves, air masses from the subtropics can be transported towards the pole in so-called tropical-subtropical streamers. These large-scale structures are areas of low potential vorticity and...
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Chris Boone (University of Waterloo)Talk
The Atmospheric Chemistry Experiment (ACE) is an ongoing satellite mission for remote sensing of the Earth’s atmosphere. It is comprised of a Fourier transform spectrometer (ACE-FTS) operating in the infrared with broad spectral coverage (750 – 4400 cm-1) and high resolution (0.02 cm-1), a UV-Visible-NIR spectrophotometer (ACE-MAESTRO, Measurement of Aerosol Extinction in the Stratosphere and...
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Dr Sören Johansson (IMK-ASF)Talk
We present trace gas measurements obtained by the airborne infrared imaging limb sounder GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) that has been operated onboard HALO (High Altitude and Long Range Research Aircraft) during the ASCCI campaign (Arctic Springtime Chemistry-Climate Investigations; March 2025) from Kiruna, Sweden. The GLORIA instrument is an airborne...
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Sotiris Sotiriadis (Belgian institute of space aeronomie)Poster
ALTIUS (Atmospheric Limb Tracker for the Investigation of the Upcoming Stratosphere) is an atmospheric limb mission being implemented in ESA's Earth Watch program and planned for launch in 2027.
The instrument consists of three imagers: UV (250-355 nm), VIS (440-675 nm) and NIR (600-1040 nm) channels. Each channel is able to take a snapshot of the scene independently of the other two...
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Mr Kristof Rose (BIRA-IASB / UCLouvain)Poster
The Atmospheric Limb Tracker for the Investigation of the Upcoming Stratosphere (ALTIUS) is the European Space Agency’s (ESA) future ozone mission, part of ESA’s Earth Watch Programme. The mission is set to launch in 2027 from Kourou, aboard the Vega-C launcher.
ALTIUS is designed to perform measurements in various geometries to optimize global coverage. This includes observing...
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Dr Antonin Berthelot (BIRA-IASB)Poster
ALTIUS (Atmospheric Limb Tracker for the Investigation of the Upcoming Stratosphere) is the upcoming stratospheric ozone monitoring mission of ESA’s Earth Watch program. ALTIUS consists of three 2D high resolution imagers: UV (250-355 nm), VIS (440-675 nm) and NIR (600-1020 nm) channels. Each channel is independent of the others and takes snapshots of the atmosphere in limb geometry at...
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Emmanuel Dekemper (BIRA-IASB)Talk
ALTIUS is ESA's upcoming Earth atmospheric limb mission. The primary objective of the mission is to provide near-real-time and consolidated stratospheric ozone profiles. Secondary objectives include stratospheric aerosols, H2O, NO2, NO3, temperature, OClO, BrO, and mesospheric ozone. The mission is in its implementation phase, with both the space and ground segments having reached the critical...
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Dr Jiansheng Zou (University of Toronto)Talk
The most recent ACE-FTS version 5.3 data for CFC-11, CFC-12 and HCFC-22 are compared with the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) version 8 data for these species, processed by the IMK/IAA (Institut für Meteorologie und Klimaforschung/Instituto de Astrofísica de Andalucía) for 2005 - 2012 . Comparisons of these two datasets are carried out for the time series of...
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Daniele Minganti (BIRA-IASB)Poster
In early 2019, anomalously large concentrations of nitrous oxide (N2O) developed in the Northern Hemisphere (NH) with a very particular pattern. Specifically, a “tripole” structure can be distinguished: positive N2O anomalies over the tropical upper stratosphere (above 10 hPa), large negative anomalies in the mid-upper stratosphere (between 10 and 20 hPa) over the subtropics and equally large...
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Christine Pohl (Institute of Environmental Studies, University of Bremen, Germany)Poster
Due to its high spatio-temporal sampling coverage, the aerosol extinction coefficient (Ext) obtained from OMPS Limb scattering observations is excellently suited for observing the temporal aerosol evolution in the stratosphere after strong volcanic eruptions and wildfires. The record of Ext has been recently improved by the University of Bremen (UB), successfully validated with SAGE III/ISS...
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Paul Jeffery (University of Toronto)Talk
The Upper Troposphere – Lower Stratosphere (UTLS) region is a chemically and dynamically active part of the atmosphere, characterized by large spatial and temporal variability. This variability complicates studies of trace gases, and in turn analysis of trends and key processes, such as stratosphere-troposphere exchange and the impact of radiatively active species on climate. While aircraft,...
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Brian Auffarth (Universität Bremen)Talk
With the enactment of the Montreal Protocol in 1987 and its Amendments phasing out ozone-depleting substances (ODS), a gradual recovery of the ozone layer has been observed, particularly in the upper stratosphere. Apart from ODS, ozone is also significantly influenced by atmospheric dynamics and changes in greenhouse gases. For attribution of long-term ozone changes and variability and their...
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Michelle Santee (Jet Propulsion Laboratory, California Institute of Technology)Talk
The 2022 eruption of the submarine Hunga volcano injected an unprecedented amount of water vapor directly into the stratosphere. In this talk, we use measurements of gas-phase constituents from the Aura Microwave Limb Sounder (MLS) and the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS), aerosol from the Suomi-NPP Ozone Mapping and Profiler Suite Limb Profiler...
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Sarah Vervalcke (Belgian Institute for Space Aeronomy)Poster
We present an intercomparison of the mean age of air (AoA) derived from three recent reanalyses: the European Centre for Medium-Range Weather Forecasts Reanalysis version 5 (ERA5) and its predecessor (ERA-Interim), the National Aeronautics and Space Administration’s Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA2), and the Japan Meteorological Agency’s...
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Veenus Venugopal (Space Physics Laboratory, VSSC, ISRO)Poster
The Brewer-Dobson Circulation (BDC), stratospheric global mass circulation, influences the distribution of trace elements in the stratosphere, particularly radiatively active water vapour and ozone. The stratospheric meridional transport responds to various oscillations in the stratosphere, notably the tropical Quasi-Biennial Oscillation (QBO) and El Niño–Southern Oscillation (ENSO). QBO...
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Sandra Wallis (University of Greifswald)Talk
In January 2022, the Hunga Tonga - Hunga Ha’apai volcano emitted approximately 150 Tg H2O into the middle atmosphere. This water vapour reached the upper polar mesosphere in the Southern Hemisphere in the beginning of 2024 and increased the H2O mixing ratio in January by about 1 ppmv between 70°S - 80°S up to an altitude of 83 km. However, no clear perturbations were found in the noctilucent...
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Stefan Bender (Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain)Talk
Polar winter descent of NOy produced by energetic particle precipitation (EPP) in the mesosphere and lower thermosphere affects polar stratospheric ozone by catalytic reactions. This, in turn, may affect regional climate via radiative and dynamical feedbacks. NOy observations by MIPAS/Envisat during 2002--2012 have provided observational constraints on the solar-activity modulated variability...
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Sergey Khaykin (LATMOS, IPSL, CNRS, UVSQ, Sorbonne Université, Guyancourt, France)Poster
GSAW is a new web portal conceived for quick visualization of various satellite observations relevant for the stratospheric aerosols with a specific focus on extreme events, such as wildfires/pyroCb and volcanic eruptions reaching the stratosphere. GSAW provides visualization of Near-Real Time (NRT) data (delivered with a latency of 1-3 hours) as well as historical data dating back to 1979 for...
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Franziska Trinkl (KIT Karlsruhe Institute of Technology)Talk
The limb-imaging Fourier transform infrared spectrometer GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) enables high-resolution remote sensing of trace gases in the upper troposphere and lower stratosphere (UTLS). During the PHILEAS (Probing High Latitude Export of Air from the Asian Summer Monsoon) campaign in August and September 2023, GLORIA was deployed aboard the...
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Daan Hubert (BIRA-IASB)Talk
Since the 1980s, limb and occultation sensors have monitored stratospheric ozone changes, requiring long-term stability better than ~2% per decade for reliable trend detection. In support of APARC/LOTUS and the 2026 WMO/UNEP ozone assessment, we evaluated bias, dispersion and stability of 17 ozone profile records against ground-based observations by ozonesonde, lidar and microwave radiometer...
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Doug Degenstein (University of Saskatchewan)Talk
The HAWC Mission is a Canadian contribution to the NASA AOS Mission designed to answer a combination of question posed within the recent decadal survey. Two main survey topics, Aerosols and Clouds, Convection and Precipitation, were originally merged into an American concept known as A-CCP. In the early days of A-CCP, Canada expressed interest in participating with a suite of national led...
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Dr Beatriz Monge-Sanz (University of Oxford, Physics Department)Talk
The Microwave Limb Sounder (MLS) on the Aura satellite has been providing essential observations of ozone for the upper troposphere and lower stratosphere (UTLS). The relevance of the UTLS region for key weather and climate patterns, and coupling between the troposphere and stratosphere, highlights the capacity of MLS O3 to enhance weather forecasting.
This study investigates the impact...
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Nicholas Ernest (NASA Langley)Poster
Two methods of deriving monomodal particle size distribution (PSD) values from SAGE III/ISS extinction measurements have recently been produced. Wrana et al. (2021) using SAGE III/ISS measurements at 449, 756, and 1544 nm construct a lookup table of extinction ratios to retrieve monomodal lognormal PSD parameter values. Knepp et al. (2024) likewise uses seven of the SAGE III/ISS aerosol...
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Matthias Schneider (Karlsruhe Institute of Technology)Talk
Satellite instruments operating in limb-viewing geometry provide independent measurements of different parts of the atmosphere (e.g., stratospheric details without tropospheric interferences). Unfortunately, missions like MIPAS, ACE-FTS, or Aura/MLS have already ended or are expected to end several years before respective next-generation missions will be operative (e.g. the current ESA Earth...
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Christian von Savigny (Institut für Physik, Universität Greifswald)Poster
Noctilucent clouds (NLCs) are optically thin ice clouds occurring near the polar mesopause in the summer hemisphere. Our understanding of the particle size of NLCs is to a large extent based on optical measurements in different observation geometries and optical NLC particle size retrievals are always based on a priori assumptions on the shape of the particle size distribution. The actual...
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Dr Daniel Gerber (RAL Space, UK)Talk
Keystone is a proposed upper atmospheric limb sounding mission that would provide a comprehensive measurement of the Mesosphere and Lower Thermosphere (MLT) composition, temperature and winds, and its variability (from a diurnal to a seasonal scale). It’s currently in Phase-0 study as ESA’s 12th Earth Explorer satellite.
The MLT is the upper atmosphere region which goes from 70km to 120km....
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Kaley Walker (University of Toronto)Talk
In August 2025, the Canadian-led Atmospheric Chemistry Experiment (ACE) mission will complete its 22nd year in orbit on board the SCISAT satellite. The more than two decades of ACE operations provide a valuable time series of composition measurements that contribute to our understanding of ozone recovery, climate change and pollutant emissions. The main instruments on board SCISAT use...
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Mr Pedro Da Costa (LATMOS, Sorbonne Université UPMC, Paris, France)Talk
Molecular scattering (Rayleigh scattering) has been extensively used from the ground with lidars and from space to observe the limb, thereby deriving vertical temperature profiles between 30 and 80 km. In this study, we investigate how temperature can be measured using the new Ozone Mapping and Profiler Suite (OMPS) sensor, aboard the Suomi NPP and NOAA-21 satellites. The OMPS consists of...
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Susann TegtmeierTalk
Stratospheric trace gases like HCl and N2O show a hemispheric asymmetry, with trends over the last two decades having opposing signs in the Northern Hemisphere (NH) and Southern Hemisphere (SH). Some of this difference is due to hemispherically asymmetric changes in the rate of transport by the Brewer–Dobson circulation (BDC). Mean age of air (AoA) is a common proxy for the transport rate by...
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Dr Viktoria Sofieva (Finnish Meteorologicla Institute)Talk
The METEOR (MEsospheric TEmperature and Ozone climate data Record) project aims to develop a high-quality, long-term climate data record of mesospheric ozone and temperature by merging observations from multiple satellite instruments. A primary objective is to assess mesospheric temperature and ozone trends, with a particular focus on the impact of solar particle precipitation on ozone levels...
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Sylvia Kellmann (KIT IMKASF)Poster
The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), onboard the ENVISAT satellite, was launched in 2002 and operated until 2012, recording infrared limb emission spectra from the middle and upper atmosphere. As a pioneering instrument, MIPAS serves as a precursor to the proposed ESA Earth Explorer 11 mission CAIRT (Changing-Atmosphere Infra-Red Tomography Explorer), which is...
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Carlo Arosio (University of Bremen)Talk
The focus of this study is the investigation and the mitigation of a retrieval artefact identified in tropospheric ozone data and ozone limb profiles retrieved from OMPS-LP observations at the University of Bremen (IUP). This artefact is associated with inhomogeneities in the surface reflectivity along the satellite line of sight (LOS).
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At IUP, a tropospheric ozone column (TrOC) product has... -
Patrick Sheese (University of Toronto)Talk
In August of this year, the ACE-FTS (Atmospheric Chemistry Experiment – Fourier Transform Spectrometer) instrument will celebrate its 2$^{nd}$ "helioversary" of being in orbit. With routine measurements of temperature profiles within 15-125 km, spanning from February 2004 to today, ACE-FTS data is well-suited to measure atmospheric cooling trends and temperature responses to solar input. This...
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Yi Huang (McGill University)Talk
Deep convections overshooting the tropopause can strongly influence the lower stratosphere. Seeing such impacts with satellites however has been a challenge. We discuss what thermodynamic anomalies can be observed and what cannot with different observing techniques (nadir vs. limb), based on Observing System Simulation Experiments utilizing high-resolution atmospheric models.
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Quentin Errera (BIRA-IASB)Talk
The Changing-Atmosphere Infra-Red Tomography Explorer (CAIRT) is a candidate for ESA’s Earth Explorer 11. This mission has been proposed in order to achieve a step change in our understanding of the coupling of atmospheric circulation, composition and regional climate. The CAIRT concept proposes to perform limb infra-red tomography of the atmosphere from the troposphere to the lower...
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Franck Montmessin (LATMOS/CNRS, Université Paris-Saclay, Sorbonne Université, Guyancourt, France)Talk
Many celestial bodies in the Solar System have been studied extensively using limb and occultation techniques, which have proven to be powerful tools for retrieving detailed information about the composition and dynamics of planetary atmospheres. These methods date back to the early 1970s, when NASA first deployed missions around Mars to investigate the planet’s atmospheric...
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Jörg Gumbel (Stockholm University)Talk
Odin’s database of noctilucent clouds (NLCs) is approaching 25 years. NLCs are readily identified in the limb profiles of scattered sunlight measured by OSIRIS onboard Odin. However, quantitative data products are needed in order to relate NLC observations to geophysical processes or to other measurements. Unfortunately, the notoriously inhomogeneous nature of NLCs prevents an analysis of limb...
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Falco Monsees (University of Bremen, Institute of Environmental Physics)Talk
Although cyclones and anticyclones, referred to as synoptic events, strongly influence weather predictability, they are not well characterized or predicted in the Arctic region because of the sparse coverage of relevant meteorological measurements. As synoptic events at high latitudes influence the atmospheric dynamics in the region of the lower stratosphere and upper troposphere (UTLS) and...
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Adam Bourassa (University of Saskatchewan)Talk
OSIRIS is a Canadian spectrometer that was launched on the Swedish Odin satellite in 2001 for a two-year mission to explore the composition and coupling of the stratosphere and mesosphere. OSIRIS was designed to measure the spectra of scattered sunlight from the ultra-violet to the near-infrared to derive vertical profiles of trace gases and aerosols, a largely untested technique at the time....
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Natalya Kramarova (NASA GSFC)Talk
The Limb Profiler (LP) is a limb-scattering sensor that is part of the Ozone Mapping and Profiler Suite (OMPS). The first OMPS LP onboard the Suomi NPP satellite has been operational for over 13 years, since 2012, while the second LP onboard the NOAA-21 satellite began observations in February 2023. In this study, we provide updates on the operational status of both LPs and offer an overview...
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Viktoria Sofieva (Finnish Meteorological Institute)Talk
This presentation is dedicated to evaluation of global and regional trends in ozone profiles using the updated merged datasets developed in the framework of ESA Climate Change Initiative for ozone project.
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For trend analyses, two long-term merged datasets of ozone profiles have been created. One is the SAGE-CCI-OMPS+ climate data record of monthly zonal mean ozone profiles. This dataset... -
Piera Raspollini (IFAC-CNR)Poster
Limb and nadir measurements offer complementary insights into atmospheric composition. Limb observations, characterized by high vertical resolution and broad vertical coverage, primarily focus on the upper troposphere and above. In contrast, nadir measurements, with higher horizontal resolution but limited vertical resolution, provide valuable data for the lower and middle troposphere.
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Recent... -
Jeremy Harrison (National Centre for Earth Observation, University of Leicester)Talk
Limb sounding has a number of advantages over nadir sounding for measuring trace gases in the atmosphere. Limb sounders measure with improved vertical resolution and can extend to higher altitudes. They measure spectra over longer pathlengths than their nadir counterparts, with an increased sensitivity to minor species. In the infrared, this increased sensitivity along with the typically...
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Marc Op de beeck (BIRA-IASB)Poster
Since 2015, the Copernicus Atmospheric Monitoring Service (CAMS) provides analyses and forecasts as well as a reanalysis of the atmospheric composition globally. These products are provided by ECMWF and are evaluated every 3 months by the Evaluation and Quality Control (EQC) team using in-situ, ground based or satellite observations. Part of this effort is the evaluation of stratospheric...
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Robert Damadeo (NASA Langley Research Center)Talk
The Stratospheric Aerosol and Gas Experiment (SAGE) III on the International Space Station (ISS) has now completed 8 years of successful operation. Performing solar and lunar occultation measurements that provide vertical profiles of aerosol extinction and key trace gases such as ozone and water vapor, the SAGE III/ISS data record has proven invaluable for assessing the impact of volcanic...
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Gabriele Stiller (KIT, IMKASF)Poster
The tropical pipe is the part of the Brewer-Dobson circulation where air is transported upwards from the troposphere into the higher atmosphere. Mixing with air from higher latitudes is widely suppressed by the so-called subtropical mixing barriers. The width and latitudinal position of the tropical pipe varies with time, driven (at least) by seasonal and QBO variations.
Metrics for the...
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Daan Hubert (BIRA-IASB)Talk
Several natural as well as anthropogenic factors affect stratospheric ozone concentrations at different timescales. Disentangling these processes in statistical analyses can be a challenge due to the representativeness of predictor time series, the lagged response of ozone and the possible non-orthogonality of proxies. Another challenge is the proper statistical modelling of non-linear...
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Dr Damien Weidmann (Rutherford Appleton Laboratory)Talk
Owing to the stringent requirement on spectral resolution and line of sight pointing, hyperspectral thermal infrared (TIR) limb sounders of atmospheric composition tend to be large missions. SOLSTICE (Solar Occultation Limb Sounding Transformative Instrument for Climate Exploration) is a mission development programme supported by the UK Space Agency and the UK Centre for Earth Observation...
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Damien Weidmann (Rutherford Appleton Laboratory)Talk
In tandem with the SOLSTICE instrument development (see related abstract ‘instrument development and qualification’) a mission simulator has been developed to evaluate the performance of the SOLSTICE system. The simulator includes production of synthetic Level 0 data raw from the instruments, the processing of calibrated atmospheric transmission as Level 1 data, and the ‘retrieval’ processor...
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Luke Oman (NASA/GSFC)Talk
The Stratosphere Troposphere Response using Infrared Vertically-resolved light Explorer (STRIVE) is a new satellite mission concept selected for a competitive Phase A Concept Study within NASA’s 2023 Earth Systems Explorer Program. STRIVE includes the Advanced Limb Infrared Chemistry Experiment (ALICE), a limb-scanning infrared imaging spectrometer along with the Aerosol Radiometer for Global...
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David Flittner (NASA Langley Research Center)Poster
An important component of the reactive nitrogen (NO$_X$) budget of the stratosphere is nitrogen dioxide (NO$_2$), which participates in key reactions influencing the life cycle of stratospheric ozone. For example, it can limit the availability of reactive chlorine by forming chlorine nitrate (ClONO$_2$), but is also directly involved in catalytic cycles destroying ozone. A major source of...
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Ghassan Taha (Morgan State University and NASA GSFC)Talk
On April 18, 2024, the Ruang volcano in North Sulawesi, Indonesia, erupted, sending volcanic materials up to 20 km altitude and drifting west of the Island. On April 29, Ruang erupted again, this time reaching an altitude of 21 km and following a similar trajectory to the earlier eruption. OMPS-NM UV measurements indicated that the volcanic clouds were primarily composed of sulfur dioxide...
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Sergey Khaykin (LATMOS, IPSL, CNRS, UVSQ, Sorbonne Université, Guyancourt, France)Talk
Extreme events such as explosive volcanic eruptions and major wildfire outbreaks can produce persistent perturbations of stratospheric aerosol and gaseous composition. Volcanic eruptions, injecting ash and sulphuric aerosol precursors into the stratosphere, have historically been recognized as the primary source of large-scale perturbations of stratospheric aerosol load. An emerging source of...
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Karen Rosenlof (NOAA Chemical Sciences Laboratory)Talk
On January 15, the Hunga volcano in the south west Pacific erupted injecting material into the stratosphere to altitudes up to or higher than 30 km. Estimates are that it injected 0.4 Tg of sulfur dioxide into the stratosphere and 150 Tg of water vapour. The sulfur mass injected was much smaller than that from the 1991 Mt. Pinatubo eruption, but the water injection was unprecedented over the...
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Jeffery Langille (University of Saskatchewan)Talk
The High-altitude Aerosols Water Vapour and Clouds (HAWC) satellite mission is Canada’s contribution to NASA’s upcoming Atmosphere Observing System (AOS). HAWC will provide observations that will focus on aerosols, clouds, and water vapor in the Upper Troposphere and Lower Stratosphere (UTLS), with coverage extending into the middle stratosphere and lower altitudes at the poles. The mission...
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Nicola Zoppetti (IFAC-CNR)Talk
In this study, we delve into the synergy between level 2 (L2) products obtained from satellite measurements with different geometries, utilizing the Complete Data Fusion (CDF) method. Specifically, we compare the fusion of data from MIPAS with IASI and the fusion of MIPAS with GOME2. This comparison allows us to analyze several key themes, including the characteristics of the CDF method and...
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Daniel Zawada (University of Saskatchewan)Talk
The Aerosol Limb Imager (ALI) instrument is currently being developed as part of the HAWC mission, which will include three Canadian instrument contributions to the NASA Atmosphere Observing System (AOS) mission. ALI will measure limb scattered radiances in the VIS-NIR spectral region at high vertical resolution and will include polarization information to better determine aerosol particle...
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Kevin Leavor (Analytical Mechanics Associates, Inc)Poster
Physics and chemistry fundamentally govern stratospheric aerosol processing and dispersion following an injection event. While a self-evident statement, the exact course of those processes which govern residence time and final yields of chemical products like sulfuric acid can have significant uncertainty in the time period shortly following these events. Forecast models have a degree of power...
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Matthew DeLand (Science Systems and Applications, Inc.)Talk
Observations of aerosol distributions in the Earth’s stratosphere represent a key input for Earth system models that need to characterize atmospheric heating. These aerosol measurements need good vertical resolution to capture variations in horizontal transport, dense spatial sampling to capture local structure, and regular temporal sampling to follow the evolution of aerosol injections at a...
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Bernd Funke (Instituto de Astrofísica de Andalucía, CSIC, Granada, Spain)Talk
The Changing-Atmosphere Infra-Red Tomography Explorer (CAIRT) is one of the two remaining candidate missions competing for implementation as ESA’s Earth Explorer 11. CAIRT aims to reveal, resolve, and unravel the complex coupling between composition, circulation, and climate in our middle atmosphere, by improving our knowledge of the chemical-dynamic-radiative interactions that govern our...
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Martina Taddia (UNIBO-DIFA/CNR-ISAC)Poster
Clouds are of great importance for climate studies. They strongly influence the Earth radiative budget, and the knowledge of their macro and microphysical properties is necessary for a correct modelling of their radiative effects. In this regard, limb sounding instruments can play an important role. Thanks to a high vertical resolution, limb observations allow to detect multiple layers cloud...
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Cara Remai (University of Saskatchewan)Talk
Stratospheric aerosols play an important role in atmospheric processes through their cooling effect on the surface and their role in cloud formation. Though aerosols have been widely studied for decades, there still exists a large gap between measurements and models. More refined measurements of aerosol size, shape, concentration and composition are required to close this gap to improve...
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Linda Megner (Stockholm University)Talk
The MATS (Mesospheric Airglow/Aerosol Tomography and Spectroscopy) mission is a Swedish satellite initiative designed to investigate atmospheric gravity waves by observing structures in the O2 atmospheric band airglow and noctilucent clouds around the Mesopause. The mission employs a high-resolution telescope to capture continuous images of the atmospheric limb, allowing for tomographic...
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Felix Friedl-Vallon (KIT-IMKASF)Talk
A new remote-sensing instrument, GLORIA-Lite, was developed by the Institute of Meteorology and Climate Research (IMK-ASF) at the Karlsruhe Institute of Technology (KIT), in collaboration with the ICE4 and ZEA2 institutes at Forschungszentrum Jülich(FZJ). It was launched within the TRANSAT2024 field campaign on board a large stratospheric balloon by a team of the Centre National d'Études...
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Taran Warnock (University of Saskatchewan)Talk
For over twenty years the SASKTRAN radiative transfer model has been used in the inversion of limb radiance observations from the OSIRIS instrument. SASKTRAN has since seen numerous upgrades that make it ideal for use in a variety of measurement scenarios across the UV, visible, and infrared spectral regimes. The next generation of the model, SASKTRAN2, is now available and has been completely...
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Gerald Wetzel (Karlsruhe Institute of Technology)Talk
The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is a cooled limb-imaging Fourier-Transform spectrometer (iFTS) providing mid-infrared spectra with high spectral resolution. A newly developed, compact and uncooled version of GLORIA (called GLORIA-Lite) is significantly smaller and lighter thanks to state-of-the-art infrared sensors, tailored electronics and...
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Kimberlee Dube (University of Saskatchewan)Talk
Stratospheric cooling and contraction are projected to occur in response to increasing anthropogenic greenhouse gas emissions. However, temperature changes in the upper stratosphere, particularly above ~45 km, are difficult to quantify and model due to a deficit of observational data in this region. The recently developed v7.3 upper stratospheric (35--60 km) temperature data product from the...
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Michael Kiefer (KIT, IMKASF)Poster
We present the implementation and results of the error estimation for temperature and trace gas mixing ratios retrieved with the IMK/IAA MIPAS L2 processor in the framework of the TUNER (Towards UNified Error Reporting) project. Several error sources are taken into account: spectral noise, propagated temperature and pointing noise, uncertainties of spectrally interfering species' abundances,...
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Irina Petropavlovskikh (CIRES, U. of Colorado)Talk
One of the goals for the SPARC OCTAV-UTLS (Observed Composition Trends And Variability in the Upper Troposphere and Lower Stratosphere) activity is to quantify long-term changes in the UTLS ozone variability and identify the driving processes. The determination of atmospheric composition trends in the UTLS remains highly uncertain due to large atmospheric variability driven by chemistry,...
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Lavinia Toso (School of Physics and Astronomy, University of Leicester, Leicester, UK; National Centre for Earth Observation, University of Leicester, Leicester, UK), Dr Jeremy J. Harrison (School of Physics and Astronomy, University of Leicester, Leicester, UK; National Centre for Earth Observation, University of Leicester, Leicester, UK)Poster
Stratospheric inorganic chlorine comprises product gases, e.g., HCl, produced by the decomposition of ozone-depleting substances (ODSs) such as chlorofluorocarbons (CFCs). Following action initiated under the 1987 Montreal Protocol, the tropospheric abundances of many long-lived ODSs have been declining as expected, leading to a corresponding decrease in total stratospheric inorganic chlorine...
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Laura SaundersTalk
Methane is a potent greenhouse gas with an increasing trend in the atmosphere due to rising emissions. Aside from its climate impacts, it is important to monitor methane because of its long lifetime of about ten years, which makes it a useful tracer of atmospheric transport. Modelled methane fields can therefore be compared with observations to evaluate transport in atmospheric models. Several...
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Mary Cate McKee (Analytical Mechanics Associates)Poster
The January 2022 eruption of the Hunga Tonga-Hunga Haʻapai (HTHH) volcano injected unprecedented volumes of aerosols and water vapor into the stratosphere. The evolution of the plume dynamics and chemical processing of the injected constituents is a unique event and opportunity of which even with global monitoring instruments instantaneous observations of that evolution are still sparse. One...
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Dr Tobias Kerzenmacher (KIT, IMKASF)Talk
This study investigates the Quasi-Biennial Oscillation (QBO) influence on the mean meridional circulation during the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) operational period (2002-2012). We employ ERA-Interim, JRA-55, and ERA5 reanalysis data alongside MIPAS tracer-derived 2-dimensional velocities. Following the SPARC Reanalysis Intercomparison Project (S-RIP)...
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Dr Nigel Richards (NASA Goddard Space Flight Center/UMBC)Talk
The Ozone Profiler and Mapping Suite (OMPS) Limb Profiler (LP) satellite instruments perform limb measurements of scattered solar radiation in the ultraviolet and visible wavelengths, which allow for the retrieval of high vertical resolution ozone profiles from the 12.5km to 57.5km with full global coverage. The first LP was launched on board the Suomi-NPP satellite in 2011 and started...
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Gabriele Stiller (KIT, IMKASF)Poster
We present global distributions of chlorine monoxide (ClO) retrieved from infrared limb emission spectra measured with the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), covering the time period 2002--2012. The retrieval was performed using spectral lines in the fundamental band of ClO around 844 cm-1. The vertical resolution of V8 ClO is 4 km at 18--20 km and 7.5--9.5 km...
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Meghan Brehon (University of Saskatchewan)Talk
The budget of stratospheric water vapour is primarily controlled by the tropical upwelling of tropospheric air masses past the cold point tropopause and into the lower stratosphere. The strength of the tropical upwelling influences the thermal characteristics of the transition region between the troposphere and stratosphere (tropical tropopause layer), constraining water vapour transport to...
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