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    Academic Journals

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• Hemispheric asymmetries in recent changes in the stratospheric circulation.

  Authors:Felix Ploeger and Hella GarnyFrom:Atmospheric Chemistry and Physics (Vol. 22, Issue 8) Peer-Reviewed

  Apr. 27, 2022287 words Brief article The expected effect of ozone recovery on the stratospheric Brewer-Dobson circulation (BDC) is a slow-down, strongest in the Southern Hemisphere (SH). In contrast, the BDC has been found to weaken more strongly in the...

• Characterization of transport from the Asian summer monsoon anticyclone into the UTLS via shedding of low potential vorticity cutoffs.

  Authors:Jan Clemens, Felix Ploeger, Paul Konopka, Raphael Portmann, Michael Sprenger, and Heini WernliFrom:Atmospheric Chemistry and Physics (Vol. 22, Issue 6) Peer-Reviewed

  Mar. 23, 2022287 words Brief article Air mass transport within the summertime Asian monsoon circulation provides a major source of anthropogenic pollution for the upper troposphere and lower stratosphere (UTLS). Here, we investigate the quasi-horizontal...

• The Asian tropopause aerosol layer within the 2017 monsoon anticyclone: microphysical properties derived from aircraft-borne in situ measurements.

  Authors:Christoph Mahnke, Ralf Weigel, Francesco Cairo, Jean-Paul Vernier, Armin Afchine, Martina Krämer, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 19) Peer-Reviewed

  Oct. 13, 2021488 words Article The Asian summer monsoon is an effective pathway for aerosol particles and precursors from the planetary boundary layer over Central, South, and East Asia into the upper troposphere and lower stratosphere. An enhancement...

• In situ observation of new particle formation (NPF) in the tropical tropopause layer of the 2017 Asian monsoon anticyclone - Part 1: Summary of StratoClim results.

  Authors:Ralf Weigel, Christoph Mahnke, Manuel Baumgartner, Antonis Dragoneas, Bärbel Vogel, Felix Ploeger, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 15) Peer-Reviewed

  Aug. 6, 2021478 words Article During the monsoon season of the year 2017 the airborne StratoClim mission took place in Kathmandu, Nepal, with eight mission flights of the M-55 Geophysica in the upper troposphere-lower stratosphere (UTLS) of the Asian...

• Processes influencing lower stratospheric water vapour in monsoon anticyclones: insights from Lagrangian modelling.

  Authors:Nuria Pilar Plaza, Aurélien Podglajen, Cristina Peña-Ortiz, and Felix PloegerFrom:Atmospheric Chemistry and Physics (Vol. 21, Issue 12) Peer-Reviewed

  June 28, 2021306 words Brief article We investigate the influence of different chemical and physical processes on the water vapour distribution in the lower stratosphere (LS), in particular in the Asian and North American monsoon anticyclones (AMA and NAMA,...

• Multitimescale variations in modeled stratospheric water vapor derived from three modern reanalysis products

  Authors:Mengchu Tao, Paul Konopka, Felix Ploeger, Xiaolu Yan, Jonathon S. Wright, Mohamadou Diallo, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 9) Peer-Reviewed

  May 16, 2019390 words Author abstract, Bri...

  Stratospheric water vapor (SWV) plays important roles in the radiation budget and ozone chemistry and is a valuable tracer for understanding stratospheric transport. Meteorological reanalyses provide variables...

• Sensitivities of modelled water vapour in the lower stratosphere: temperature uncertainty, effects of horizontal transport and small-scale mixing

  Authors:Liubov Poshyvailo, Paul Konopka, Martin Riese, and Felix PloegerFrom:Atmospheric Chemistry and Physics (Vol. 18, Issue 12) Peer-Reviewed

  June 18, 2018436 words Author abstract, Bri... Water vapour (H.sub.2 O) in the upper troposphere and lower stratosphere (UTLS) has a significant role for global radiation. A realistic representation of H.sub.2 O is therefore critical for accurate climate model...

• The stratospheric Brewer-Dobson circulation inferred from age of air in the ERA5 reanalysis.

  Authors:Felix Ploeger, Mohamadou Diallo, Edward Charlesworth, Paul Konopka, Bernard Legras, Johannes C. Laube, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 11) Peer-Reviewed

  June 2, 2021324 words Brief article This paper investigates the global stratospheric Brewer-Dobson circulation (BDC) in the ERA5 meteorological reanalysis from the European Centre for Medium-Range Weather Forecasts (ECMWF). The analysis is based on...

• Trend differences in lower stratospheric water vapour between Boulder and the zonal mean and their role in understanding fundamental observational discrepancies

  Authors:Stefan Lossow, Dale F. Hurst, Karen H. Rosenlof, Gabriele P. Stiller, Thomas von Clarmann, Sabine Brinkop, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 11) Peer-Reviewed

  June 14, 2018471 words Author abstract, Bri... Trend estimates with different signs are reported in the literature for lower stratospheric water vapour considering the time period between the late 1980s and 2010. The NOAA (National Oceanic and Atmospheric...

• Shift of subtropical transport barriers explains observed hemispheric asymmetry of decadal trends of age of air

  Authors:Gabriele P. Stiller, Federico Fierli, Felix Ploeger, Chiara Cagnazzo, Bernd Funke, Florian J. Haenel, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 18) Peer-Reviewed

  Sept. 21, 2017219 words Author abstract, Bri... In response to global warming, the Brewer--Dobson circulation in the stratosphere is expected to accelerate and the mean transport time of air along this circulation to decrease. This would imply a negative...

• Investigating stratospheric changes between 2009 and 2018 with halogenated trace gas data from aircraft, AirCores, and a global model focusing on CFC-11.

  Authors:Johannes C. Laube, Emma C. Leedham Elvidge, Karina E. Adcock, Bianca Baier, Carl A. M. Brenninkmeijer, Huilin Chen, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 16) Peer-Reviewed

  Aug. 20, 2020415 words Article We present new observations of trace gases in the stratosphere based on a cost-effective sampling technique that can access much higher altitudes than aircraft. The further development of this method now provides...

• Seasonal and inter-annual variability of lower stratospheric age of air spectra

  Authors:Felix Ploeger and Thomas BirnerFrom:Atmospheric Chemistry and Physics (Vol. 16, Issue 15) Peer-Reviewed

  Aug. 11, 2016233 words Brief article Trace gas transport in the lower stratosphere is investigated by analysing seasonal and inter-annual variations of the age of air spectrum - the probability distribution of stratospheric transit times. Age spectra are...

• Quantifying pollution transport from the Asian monsoon anticyclone into the lower stratosphere

  Authors:Felix Ploeger, Paul Konopka, Kaley Walker, and Martin RieseFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 11) Peer-Reviewed

  June 14, 2017178 words Author abstract, Bri... Pollution transport from the surface to the stratosphere within the Asian monsoon circulation may cause harmful effects on stratospheric chemistry and climate. Here, we investigate air mass transport from the monsoon...

• Tropospheric mixing and parametrization of unresolved convective updrafts as implemented in the Chemical Lagrangian Model of the Stratosphere (CLaMS v2.0)

  Authors:Paul Konopka, Mengchu Tao, Felix Ploeger, Mohamadou Diallo, and Martin RieseFrom:Geoscientific Model Development (Vol. 12, Issue 6) Peer-Reviewed

  June 24, 2019344 words Author abstract, Bri...

  Inaccurate representation of mixing in chemistry transport models, mainly suffering from an excessive numerical diffusion, strongly influences the quantitative estimates of the stratosphere-troposphere exchange...

• Quantification of water vapour transport from the Asian monsoon to the stratosphere

  Authors:Hella Garny and Felix PloegerFrom:Atmospheric Chemistry and Physics (Vol. 19, Issue 13) Peer-Reviewed

  July 12, 2019294 words Author abstract, Bri...

  Numerous studies have presented evidence that the Asian summer monsoon anticyclone substantially influences the distribution of trace gases - including water vapour - in the upper troposphere and lower stratosphere...

• The advective Brewer-Dobson circulation in the ERA5 reanalysis: climatology, variability, and trends.

  Authors:Mohamadou Diallo, Manfred Ern, and Felix PloegerFrom:Atmospheric Chemistry and Physics (Vol. 21, Issue 10) Peer-Reviewed

  May 18, 2021470 words Article The stratospheric Brewer-Dobson circulation (BDC) is an important element of climate as it determines the transport and distributions of key radiatively active atmospheric trace gases, which affect the Earth's radiation...

• Evidence of horizontal and vertical transport of water in the Southern Hemisphere tropical tropopause layer (TTL) from high-resolution balloon observations

  Authors:Sergey M. Khaykin, Jean-Pierre Pommereau, Emmanuel D. Riviere, Gerhard Held, Felix Ploeger, Melanie Ghysels, et al.From:Atmospheric Chemistry and Physics (Vol. 16, Issue 18) Peer-Reviewed

  Sept. 29, 2016407 words Brief article High-resolution in situ balloon measurements of water vapour, aerosol, methane and temperature in the upper tropical tropopause layer (TTL) and lower stratosphere are used to evaluate the processes affecting the...

• Influence of enhanced Asian NO.sub.x emissions on ozone in the upper troposphere and lower stratosphere in chemistry--climate model simulations

  Authors:Chaitri Roy, Suvarna Fadnavis, D. C. Ayantika, Felix Ploeger, and Alexandru RapFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 2) Peer-Reviewed

  Jan. 27, 2017302 words Author abstract, Bri... The Asian summer monsoon (ASM) anticyclone is the most pronounced circulation pattern in the upper troposphere and lower stratosphere (UTLS) during northern hemispheric summer. ASM convection plays...

• Stratospheric aerosol layer perturbation caused by the 2019 Raikoke and Ulawun eruptions and their radiative forcing.

  Authors:Corinna Kloss, Gwenaël Berthet, Pasquale Sellitto, Felix Ploeger, Ghassan Taha, Mariam Tidiga, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 1) Peer-Reviewed

  Jan. 15, 2021286 words Brief article In June 2019 a stratospheric eruption occurred at Raikoke (48.sup." N, 153.sup." E). Satellite observations show the injection of ash and SO.sub.2 into the lower stratosphere and an early entrainment of the plume into a...

• Observations of PAN and its confinement in the Asian summer monsoon anticyclone in high spatial resolution

  Authors:Mandfred Ern, Martin Kaufmann, Reinhold Spang, Felix Ploeger, and Martin RieseFrom:Atmospheric Chemistry and Physics (Vol. 16, Issue 13) Peer-Reviewed

  July 12, 2016311 words Brief article This paper presents an analysis of trace gases in the Asian summer monsoon (ASM) region on the basis of observations by the CRISTA infrared limb sounder taken in low-earth orbit in August 1997. The spatially...