Felix Friedl-Vallon
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View article: Intercomparison and validation of first GLORIA-B measurements of stratospheric and upper tropospheric long-lived tracers and photochemically active species
Intercomparison and validation of first GLORIA-B measurements of stratospheric and upper tropospheric long-lived tracers and photochemically active species Open
Accurate observations of the vertical distribution and variability of atmospheric trace gases are essential for understanding chemical processes, validating atmospheric models, and monitoring the impact of anthropogenic emissions on climat…
View article: Versatile Fourier Transform Spectrometer Model for Earth Observation Missions Validated with In-Flight Systems Measurements
Versatile Fourier Transform Spectrometer Model for Earth Observation Missions Validated with In-Flight Systems Measurements Open
Fourier Transform Spectrometers (FTS) are cornerstone instruments in Earth observation space missions, effectively monitoring atmospheric gases in missions such as Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), and Infr…
View article: Stratospheric and upper tropospheric measurements of long-lived tracers and photochemically active species with GLORIA-B
Stratospheric and upper tropospheric measurements of long-lived tracers and photochemically active species with GLORIA-B Open
The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is a limb-imaging Fourier-Transform Spectrometer (iFTS) providing high-resolution mid-infrared spectra in the 780–1400 cm-1 wavenumber range. Originally designed f…
View article: Ammonia in the upper troposphere–lower stratosphere (UTLS): GLORIA airborne measurements for CAMS model evaluation in the Asian monsoon and in biomass burning plumes above the South Atlantic
Ammonia in the upper troposphere–lower stratosphere (UTLS): GLORIA airborne measurements for CAMS model evaluation in the Asian monsoon and in biomass burning plumes above the South Atlantic Open
Ammonia (NH3) is the major alkaline species in the atmosphere and plays an important role in aerosol formation, which affects local air quality and the radiation budget. NH3 in the upper troposphere and lower stratosphere (UTLS) is difficu…
View article: The Changing-Atmosphere Infra-Red Tomography Explorer (CAIRT) Earth Explorer 11 candidate mission
The Changing-Atmosphere Infra-Red Tomography Explorer (CAIRT) Earth Explorer 11 candidate mission Open
The Changing-Atmosphere Infra-Red Tomography Explorer (CAIRT) is currently in Phase A as one of two final candidates for ESA’s Earth Explorer 11. As a Fourier transform infrared limb imager, CAIRT will observe simultaneously from the…
View article: Ammonium nitrate and biomass burning pollution in the UTLS: First results from GLORIA airborne measurements of Asian Monsoon outflow during the PHILEAS campaign 2023
Ammonium nitrate and biomass burning pollution in the UTLS: First results from GLORIA airborne measurements of Asian Monsoon outflow during the PHILEAS campaign 2023 Open
We present trace gas and aerosol 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 R…
View article: Stratospheric and upper tropospheric measurements of long-lived tracers and photochemically active species of the nitrogen, chlorine, and bromine families with GLORIA-B
Stratospheric and upper tropospheric measurements of long-lived tracers and photochemically active species of the nitrogen, chlorine, and bromine families with GLORIA-B Open
The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is a limb-imaging Fourier-Transform spectrometer (iFTS) providing mid-infrared spectra with high spectral sampling (0.0625 cm-1 in the wavelength range 780-1400 cm…
View article: Review of Johansson et al. (2024)
Review of Johansson et al. (2024) Open
Abstract. Ammonia (NH3) is the major alkaline species in the atmosphere and plays an important role in aerosol formation, which affects local air quality and the radiation budget. NH3 in the Upper Tro…
View article: Ammonia (NH <sub>3</sub> ) in the UTLS: GLORIA airborne measurements for CAMS model evaluation in the Asian Monsoon and in biomass burning plumes above the South Atlantic
Ammonia (NH <sub>3</sub> ) in the UTLS: GLORIA airborne measurements for CAMS model evaluation in the Asian Monsoon and in biomass burning plumes above the South Atlantic Open
Ammonia (NH3) is the major alkaline species in the atmosphere and plays an important role in aerosol formation, which affects local air quality and the radiation budget. NH3 in the Upper Troposphere and Lower Stratosphere (UTLS) is difficu…
View article: Supplementary material to "Ammonia (NH <sub>3</sub> ) in the UTLS: GLORIA airborne measurements for CAMS model evaluation in the Asian Monsoon and in biomass burning plumes above the South Atlantic"
Supplementary material to "Ammonia (NH <sub>3</sub> ) in the UTLS: GLORIA airborne measurements for CAMS model evaluation in the Asian Monsoon and in biomass burning plumes above the South Atlantic" Open
View article: Non‐Orographic Gravity Waves and Turbulence Caused by Merging Jet Streams
Non‐Orographic Gravity Waves and Turbulence Caused by Merging Jet Streams Open
Jet streams are important sources of non‐orographic internal gravity waves and clear air turbulence (CAT). We analyze non‐orographic gravity waves and CAT during a merger of the polar front jet stream (PFJ) with the subtropical jet stream …
View article: N2O Temporal Variability from the Middle Troposphere to the Middle Stratosphere Based on Airborne and Balloon-Borne Observations during the Period 1987–2018
N2O Temporal Variability from the Middle Troposphere to the Middle Stratosphere Based on Airborne and Balloon-Borne Observations during the Period 1987–2018 Open
Nitrous oxide (N2O) is the fourth most important greenhouse gas in the atmosphere and is considered the most important current source gas emission for global stratospheric ozone depletion (O3). It has natural and anthropogenic sources, mai…
View article: The CAIRT earth explorer 11 mission: a way towards global gravity wave momentum budgets
The CAIRT earth explorer 11 mission: a way towards global gravity wave momentum budgets Open
Retrieving global observations of gravity waves (GW) from recent satellite missions is challenging. Nadir viewing satellites such as AIRS provide directional momentum fluxes, but lack fine vertical resolution and hence observe only those G…
View article: Long-term validation of MIPAS ESA operational products using MIPAS-B measurements
Long-term validation of MIPAS ESA operational products using MIPAS-B measurements Open
The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) was a limb-viewing infrared Fourier transform spectrometer that operated from 2002 to 2012 aboard the Environmental Satellite (ENVISAT). The final re-processing of the f…
View article: Non-orographic gravity waves and turbulence caused by merging jet streams
Non-orographic gravity waves and turbulence caused by merging jet streams Open
Jet streams are important sources of non-orographic internal gravity waves and clear air turbulence (CAT). We analyze non-orographic gravity waves and CAT during a merging of the polar front jet stream (PFJ) with the subtropical jet stream…
View article: Reviewer Comments on amt-2022-114
Reviewer Comments on amt-2022-114 Open
Abstract. The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) was a limb-viewing infrared Fourier transform spectrometer that operated from 2002 to 2012 aboard the Environmental Satellite (ENVISAT). The f…
View article: Comment on amt-2022-114
Comment on amt-2022-114 Open
Abstract. The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) was a limb-viewing infrared Fourier transform spectrometer that operated from 2002 to 2012 aboard the Environmental Satellite (ENVISAT). The f…
View article: Referee report on amt-2022-114
Referee report on amt-2022-114 Open
The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) was a limb-viewing infrared Fourier transform spectrometer that operated from 2002 to 2012 aboard the Environmental Satellite (ENVISAT). The final re-processing of the f…
View article: Long-term validation of MIPAS ESA operational products using MIPAS-B measurements
Long-term validation of MIPAS ESA operational products using MIPAS-B measurements Open
The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) was a limb-viewing infrared Fourier transform spectrometer that operated from 2002 to 2012 aboard the Environmental Satellite (ENVISAT). The final re-processing of the f…
View article: Quantification and mitigation of the instrument effects and uncertainties of the airborne limb imaging FTIR GLORIA
Quantification and mitigation of the instrument effects and uncertainties of the airborne limb imaging FTIR GLORIA Open
The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an infrared imaging FTS (Fourier transform spectrometer) with a 2-D infrared detector that is operated on two high-flying research aircraft. It has flown on eig…
View article: The CAIRT Earth Explorer 11 mission: A way towards global GW momentum budgets
The CAIRT Earth Explorer 11 mission: A way towards global GW momentum budgets Open
<p>Retrieving global observations of gravity waves (GWs) from recent satellite missions is challenging. Nadir viewing satellites such as AIRS provide directional momentum fluxes, but lack fine vertical resolution and hence observe on…
View article: First flight of the mid-infrared limb-imaging interferometer GLORIA on a stratospheric balloon
First flight of the mid-infrared limb-imaging interferometer GLORIA on a stratospheric balloon Open
<p>GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) is a limb-imaging Fourier-Transform spectrometer (iFTS) providing radiances of the thermal infrared emission of atmospheric species. The nominal wavelength ra…
View article: Oblique propagation of mountain waves to the upwind side of the Andes observed by GLORIA and ALIMA during the Southtrac measurement campaign
Oblique propagation of mountain waves to the upwind side of the Andes observed by GLORIA and ALIMA during the Southtrac measurement campaign Open
<p>The SOUTHTRAC measurement campaign was held in Argentina from September to Novem ber 2019 using the HALO research aircraft. One of the main goals of the campaign was gravity wave (GW) study in the region of Southern Andes: a globa…
View article: Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model
Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model Open
In this study, we present simultaneous airborne measurements of peroxyacetyl nitrate (PAN), ethane (C2H6), formic acid (HCOOH), methanol (CH3OH), and ethylene (C2H4) above the South Atlantic in September and October 2019. Observations were…
View article: Challenge of modelling GLORIA observations of upper troposphere–lowermost stratosphere trace gas and cloud distributions at high latitudes: a case study with state-of-the-art models
Challenge of modelling GLORIA observations of upper troposphere–lowermost stratosphere trace gas and cloud distributions at high latitudes: a case study with state-of-the-art models Open
Water vapour and ozone are important for the thermal and radiative balance of the upper troposphere (UT) and lowermost stratosphere (LMS). Both species are modulated by transport processes. Chemical and microphysical processes affect them …
View article: Comment on amt-2021-293
Comment on amt-2021-293 Open
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an infrared imaging FTS (Fourier transform spectrometer) with a 2-D infrared detector that is operated on two high-flying research ai…
View article: Supplementary material to "Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model"
Supplementary material to "Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model" Open
View article: Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model
Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model Open
In this study, we present simultaneous airborne measurements of peroxyacetyl nitrate (PAN), ethane (C2H6), formic acid (HCOOH), methanol (CH3OH), and ethylene (C2H4) above the South Atlantic in September and October 2019. Observations were…
View article: SOUTHTRAC-GW: Gravity Waves Meet Sudden Stratospheric Warming
SOUTHTRAC-GW: Gravity Waves Meet Sudden Stratospheric Warming Open
T he region of the southern Andes and the Antarctic Peninsula is known as the world's strongest stratospheric hotspot of gravity wave (GW) activity, occurring during austral winter through early spring.Known sources of GWs include flow ove…
View article: Comment on amt-2021-293
Comment on amt-2021-293 Open
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an infrared imaging FTS (Fourier transform spectrometer) with a 2-D infrared detector that is operated on two high-flying research ai…