Felix Plöger
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View article: Transport of volcanic aerosol from the Raikoke eruption in 2019 through the Northern Hemisphere
Transport of volcanic aerosol from the Raikoke eruption in 2019 through the Northern Hemisphere Open
Volcanic injections into the upper troposphere–lower stratosphere (UTLS) affect climate by altering Earth's radiation budget and atmospheric chemistry. However, the pathways by which mid-latitude eruptions spread globally remain poorly und…
View article: Long-term changes in the thermodynamic structure of the lowermost stratosphere inferred from reanalysis data
Long-term changes in the thermodynamic structure of the lowermost stratosphere inferred from reanalysis data Open
The lowermost stratosphere (LMS) plays an important role in stratosphere–troposphere coupling and the Earth's radiation balance. This study investigates the effects of long-term changes in the tropopause and the lower-stratospheric isentro…
View article: Variability and trends in the potential vorticity (PV)-gradient dynamical tropopause
Variability and trends in the potential vorticity (PV)-gradient dynamical tropopause Open
The dynamical tropopause acts as a transport barrier between the tropical upper troposphere and extratropical lowermost stratosphere and is characterized by steep gradients in potential vorticity (PV) along an isentropic surface. Hence, th…
View article: On the estimation of stratospheric age of air from correlations of multiple trace gases
On the estimation of stratospheric age of air from correlations of multiple trace gases Open
The stratospheric circulation is an important element in the climate system, but observational constraints are prone to significant uncertainties due to the low circulation velocities and uncertainties in available trace gas measurements. …
View article: Long-term changes in the thermodynamic structure of the lowermost stratosphere inferred from ERA5 reanalysis data
Long-term changes in the thermodynamic structure of the lowermost stratosphere inferred from ERA5 reanalysis data Open
The lowermost stratosphere (LMS) plays an important role for stratosphere-troposphere coupling and the Earth’s radiation balance. This study investigates the effects of long-term changes of the tropopause and the lower stratospheric isentr…
View article: Comment on egusphere-2024-471
Comment on egusphere-2024-471 Open
Abstract. The dynamical tropopause as a transport barrier between the tropical upper troposphere and extratropical lowermost stratosphere is characterized by steep gradients in potential vorticity (PV) along an isentropic …
View article: Characterization of refractory aerosol particles collected in the tropical upper troposphere–lower stratosphere (UTLS) within the Asian tropopause aerosol layer (ATAL)
Characterization of refractory aerosol particles collected in the tropical upper troposphere–lower stratosphere (UTLS) within the Asian tropopause aerosol layer (ATAL) Open
Aerosol particles with diameters larger than 40 nm were collected during the flight campaign StratoClim 2017 within the Asian tropopause aerosol layer (ATAL) of the 2017 monsoon anticyclone above the Indian subcontinent. A multi-impactor s…
View article: Variability and trends in the PV-gradient dynamical tropopause
Variability and trends in the PV-gradient dynamical tropopause Open
The dynamical tropopause as a transport barrier between the tropical upper troposphere and extratropical lowermost stratosphere is characterized by steep gradients in potential vorticity (PV) along an isentropic surface. Hence, the latitud…
View article: Impact of Hunga Tonga Hunga Ha’apai eruption on the global stratospheric aerosol layer in comparison with other eruptions and extreme fire events of the past decade 
Impact of Hunga Tonga Hunga Ha’apai eruption on the global stratospheric aerosol layer in comparison with other eruptions and extreme fire events of the past decade  Open
Using a combination of satellite, ground-based and in-situ observations, we quantify and compare the impact of the most recent moderate volcanic eruptions and extreme fire events (volcanic eruptions: Ambae, Vanuatu in July 2018; Raikoke, R…
View article: Variability and trends in the PV-gradient dynamical tropopause
Variability and trends in the PV-gradient dynamical tropopause Open
The dynamical tropopause as a transport barrier between the tropical upper troposphere and extratropical lowermost stratosphere is characterized by steep gradients in potential vorticity (PV) along an isentropic surface. Hence, the latitud…
View article: Comment on egusphere-2023-2245
Comment on egusphere-2023-2245 Open
Abstract. Aerosol particles with diameters larger than 40 nm were collected during the flight campaign StratoClim2017 within the Asian Tropopause Aerosol Layer (ATAL) of the 2017 Monsoon Anticyclone above the Indian subcon…
View article: Characterization of refractory aerosol particles collected in the tropical UTLS within the Asian Tropopause Aerosol Layer (ATAL)
Characterization of refractory aerosol particles collected in the tropical UTLS within the Asian Tropopause Aerosol Layer (ATAL) Open
Aerosol particles with diameters larger than 40 nm were collected during the flight campaign StratoClim2017 within the Asian Tropopause Aerosol Layer (ATAL) of the 2017 Monsoon Anticyclone above the Indian subcontinent. A multi-impactor sy…
View article: CLaMS results used for age of air analysis in the report of assessment of the ESA Earth Explorer candidate mission CAIRT
CLaMS results used for age of air analysis in the report of assessment of the ESA Earth Explorer candidate mission CAIRT Open
Results of the Chemical Lagrangian Model of the Stratosphere (CLaMS) used for age of air analysis in the report of assessment of the ESA Earth Explorer candidate mission CAIRT. Days of results: 2011-01-01, 2011-04-01, 2011-07-01, 2011-10-0…
View article: CLaMS results used for age of air analysis in the report of assessment of the ESA Earth Explorer candidate mission CAIRT
CLaMS results used for age of air analysis in the report of assessment of the ESA Earth Explorer candidate mission CAIRT Open
Results of the Chemical Lagrangian Model of the Stratosphere (CLaMS) used for age of air analysis in the report of assessment of the ESA Earth Explorer candidate mission CAIRT. Days of results: 2011-01-01, 2011-04-01, 2011-07-01, 2011-10-0…
View article: QBO modulation of the Asian Monsoon water vapour
QBO modulation of the Asian Monsoon water vapour Open
The Asian Monsoon (AM) plays a key role in the transport of water vapour to the lower stratosphere and contributes significantly to the wet phase of the annual global stratospheric water vapour cycle. Although it is known that the QBO is o…
View article: Stratospheric water vapor affecting atmospheric circulation
Stratospheric water vapor affecting atmospheric circulation Open
View article: Stratospheric water vapor affecting atmospheric circulation
Stratospheric water vapor affecting atmospheric circulation Open
Water vapor plays an important role in many aspects of the climate system, by affecting radiation, cloud formation, atmospheric chemistry and dynamics. Even the low stratospheric water vapor content provides an important climate feedback, …
View article: A Method for Estimating the Evolution of Brewer-Dobson Circulation Upwelling
A Method for Estimating the Evolution of Brewer-Dobson Circulation Upwelling Open
<p>Both theory and climate model results suggest that the Brewer-Dobson circulation should strengthen with increasing greenhouse gas concentrations. Can this be confirmed by observations?</p><p>Directly measuring the circ…
View article: 3-D tomographic observations of Rossby wave breaking over the North Atlantic during the WISE aircraft campaign in 2017
3-D tomographic observations of Rossby wave breaking over the North Atlantic during the WISE aircraft campaign in 2017 Open
This paper presents measurements of ozone, water vapour and nitric acid (HNO3) in the upper troposphere/lower stratosphere (UTLS) over North Atlantic and Europe. The measurements were acquired with the Gimballed Limb Observer for Radiance …
View article: 3-D tomographic observations of Rossby wave breaking over the Northern Atlantic during the WISE aircraft campaign in 2017
3-D tomographic observations of Rossby wave breaking over the Northern Atlantic during the WISE aircraft campaign in 2017 Open
<p>We present measurements of ozone, water vapour and nitric acid in the upper troposphere/lower stratosphere (UTLS) over North Atlantic and Europe. The measurements were acquired with the Gimballed Limb Observer for Radiance Imaging…
View article: Investigating stratospheric circulation and chemistry changes over three decades with trace gas data from aircraft, large balloons, and AirCores
Investigating stratospheric circulation and chemistry changes over three decades with trace gas data from aircraft, large balloons, and AirCores Open
<p>Laube et al. (2020) investigated stratospheric changes between 2009 and 2018 with halogenated trace gas data (CFC-11, CFC-12, H-1211, H-1301, HCFC-22, and SF<sub>6</sub>) from air samples collected via aircraft and Air…
View article: Impact of Lagrangian transport on lower-stratospheric water vapor and radiative balance in a climate model
Impact of Lagrangian transport on lower-stratospheric water vapor and radiative balance in a climate model Open
<p>A robust result of climate model simulations is the moistening of the stratosphere.<br>Many models show their strongest changes in stratospheric water vapor in the extratropical lowermost stratosphere, a change which could h…
View article: The Changing-Atmosphere Infra-Red Tomography Explorer CAIRT &#8211; a proposal for an innovative whole-atmosphere infra-red limb imaging satellite instrument
The Changing-Atmosphere Infra-Red Tomography Explorer CAIRT – a proposal for an innovative whole-atmosphere infra-red limb imaging satellite instrument Open
<p>To improve our knowledge of the coupling of atmospheric circulation, composition and regional climate change, and to provide the urgently needed observations of the on-going changes and processes involved, we have recently propose…
View article: Reappraising the appropriate calculation of the potential temperature
Reappraising the appropriate calculation of the potential temperature Open
<p>The potential temperature is a widely used quantity in atmospheric science since it corresponds to the entropy and is conserved for adiabatic changes of dry air. As such, it is routinely employed in applications ranging from atmos…
View article: Reappraising the appropriate calculation of a common meteorological quantity: potential temperature
Reappraising the appropriate calculation of a common meteorological quantity: potential temperature Open
The potential temperature is a widely used quantity in atmospheric science since it is conserved for dry air's adiabatic changes of state. Its definition involves the specific heat capacity of dry air, which is traditionally assumed as con…
View article: 3-D tomographic observations of Rossby wave breaking over theNorthern Atlantic during the WISE aircraft campaign in 2017
3-D tomographic observations of Rossby wave breaking over theNorthern Atlantic during the WISE aircraft campaign in 2017 Open
This paper presents measurements of ozone, water vapour and nitric acid in the upper troposphere/lower stratosphere (UTLS) over North Atlantic and Europe. The measurements were acquired with the Gimballed Limb Observer for Radiance Imaging…
View article: Impact of Lagrangian transport on lower-stratospheric transport timescales in a climate model
Impact of Lagrangian transport on lower-stratospheric transport timescales in a climate model Open
We investigate the impact of model trace gas transport schemes on the representation of transport processes in the upper troposphere and lower stratosphere. Towards this end, the Chemical Lagrangian Model of the Stratosphere (CLaMS) was co…
View article: Impact of Lagrangian Transport on Lower-Stratospheric Transport Time Scales in a Climate Model
Impact of Lagrangian Transport on Lower-Stratospheric Transport Time Scales in a Climate Model Open
We investigate the impact of model trace gas transport schemes on the representation of transport processes in the upper troposphere and lower stratosphere. Towards this end, the Chemical Lagrangian Model of the Stratosphere (CLaMS) was co…
View article: Investigation of transport in the northern lowermost stratosphere between spring and fall using airborne in situ tracer measurements
Investigation of transport in the northern lowermost stratosphere between spring and fall using airborne in situ tracer measurements Open
<p>Over the course of the summer, when the subtropical jet is weakest, quasi-isentropic transport of young air from the troposphere and the tropical tropopause layer into the northern hemisphere (NH) lowermost stratosphere (LMS) is i…
View article: Results from a comparison of HCN measurements and Lagrangian backtrajectory analyses in the Asian Summer Monsoon Anticyclone
Results from a comparison of HCN measurements and Lagrangian backtrajectory analyses in the Asian Summer Monsoon Anticyclone Open
<p>The StratoClim aircraft field campaign took place from Kathmandu, Nepal, in summer 2017 in<br>order to study the atmospheric composition, chemistry, and dynamics in the Asian Summer<br>Monsoon Anticyclone (ASMA) which …