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Dive into the research topics where C. M. Volk is active.

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Featured researches published by C. M. Volk.


Geophysical Research Letters | 2000

CO2 and SF6 as stratospheric age tracers: Consistency and the effect of mesospheric SF6-loss

M. Strunk; Andreas Engel; Ulrich Schmidt; C. M. Volk; Thomas Wetter; Ingeborg Levin; H. Glatzel-Mattheier

Mixing ratios of the conserved tracers SF6 and CO2 in air samples collected with cryogenic whole-air samplers during two balloon flights in the Arctic and mid-latitude stratosphere up to 30 km altitude in 1997 are presented. The data are used to derive the mean age of stratospheric air. The calculated CO2-ages agree with the corresponding SF6-ages to within 0.5 years. These results do not confirm the findings previously reported by Harnisch et al. [1998] but rather suggest that SF6 and CO2 can be regarded as equivalent age tracers. However, evidence is presented that this general agreement may not be valid for polar stratospheric air parcels that comprise fractions of mesospheric air.


Atmospheric Chemistry and Physics | 2004

Simulation of Denitrification and Ozone Loss for the Arctic Winter 2002/2003

J.-U. Grooß; G. Günther; Ralph Müller; Paul Konopka; S. Bausch; Hans Schlager; C. Voigt; C. M. Volk; Geoffrey C. Toon


Atmospheric Chemistry and Physics | 2003

Ultrathin Tropical Tropopause Clouds (UTTCs): I. Cloud morphology and occurrence

Th. Peter; Beiping Luo; Martin Wirth; Christoph Kiemle; H. Flentje; V. Yushkov; V. Khattatov; V. Rudakov; A. Thomas; S. Borrmann; G. Toci; P. Mazzinghi; J. Beuermann; C. Schiller; F. Cairo; G. Di Donfrancesco; A. Adriani; C. M. Volk; Johan Ström; Kevin J. Noone; Valentin Mitev; R. MacKenzie; Kenneth S. Carslaw; Thomas Trautmann; V. Santacesaria; L. Stefanutti


Atmospheric Chemistry and Physics | 2007

Contribution of mixing to upward transport across the tropical tropopause layer (TTL)

P. Konopka; G. Günther; Ralph Müller; F. H. S. dos Santos; C. Schiller; Fabrizio Ravegnani; A. Ulanovsky; Hans Schlager; C. M. Volk; S. Viciani; Laura L. Pan; Daniel S. McKenna; Martin Riese


Geophysical Research Letters | 2003

Dehydration potential of ultrathin clouds at the tropical tropopause

Beiping Luo; Th. Peter; S. Fueglistaler; Heini Wernli; Martin Wirth; Christoph Kiemle; H. Flentje; V. Yushkov; V. Khattatov; V. Rudakov; Axel Thomas; Stephan Borrmann; G. Toci; P. Mazzinghi; J. Beuermann; C. Schiller; F. Cairo; G. Di Donfrancesco; A. Adriani; C. M. Volk; Johan Ström; Kevin J. Noone; Valentin Mitev; R. MacKenzie; Kenneth S. Carslaw; Thomas Trautmann; V. Santacesaria; L. Stefanutti


Atmospheric Chemistry and Physics | 2009

Aerosols in the tropical and subtropical UT/LS: in-situ measurements of submicron particle abundance and volatility

S. Borrmann; Daniel Kunkel; R. Weigel; Andreas Minikin; Terry Deshler; J. C. Wilson; Joachim Curtius; C. M. Volk; C.D. Homan; A. Ulanovsky; F. Ravegnani; S. Viciani; G. Shur; Gennady Belyaev; Kathy S. Law; F. Cairo


Atmospheric Chemistry and Physics | 2008

Envisat MIPAS measurements of CFC-11: retrieval, validation, and climatology

Lars Hoffmann; M. Kaufmann; Reinhold Spang; Ralph Müller; John J. Remedios; D. P. Moore; C. M. Volk; T. von Clarmann; Martin Riese


Atmospheric Chemistry and Physics | 2009

Cross-hemispheric transport of central African biomass burning pollutants: implications for downwind ozone production

Elsa Real; Emiliano Orlandi; Kathy S. Law; Federico Fierli; Damien Josset; F. Cairo; Hans Schlager; S. Borrmann; Daniel Kunkel; C. M. Volk; J. B. McQuaid; D. Stewart; James Lee; A. C. Lewis; J. R. Hopkins; F. Ravegnani; A. Ulanovski; C. Liousse


Atmospheric Chemistry and Physics | 2011

In situ observations of new particle formation in the tropical upper troposphere: the role of clouds and the nucleation mechanism

R. Weigel; S. Borrmann; Jan Kazil; Andreas Minikin; Andreas Stohl; J. C. Wilson; Jeanne M. Reeves; Daniel Kunkel; M. de Reus; W. Frey; E. R. Lovejoy; C. M. Volk; S. Viciani; F. D'Amato; C. Schiller; T. Peter; Hans Schlager; F. Cairo; Kathy S. Law; G. Shur; Gennady Belyaev; Joachim Curtius


Atmospheric Chemistry and Physics | 2012

Heterogeneous chlorine activation on stratospheric aerosols and clouds in the Arctic polar vortex

Tobias Wegner; J.-U. Grooß; M. von Hobe; F. Stroh; O. Sumińska-Ebersoldt; C. M. Volk; E. Hösen; V. Mitev; G. Shur; Ralph Müller

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C. Schiller

Forschungszentrum Jülich

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J.-U. Grooß

Forschungszentrum Jülich

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F. Stroh

Forschungszentrum Jülich

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P. Konopka

Forschungszentrum Jülich

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F. Cairo

National Research Council

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G. Günther

Forschungszentrum Jülich

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M. von Hobe

Forschungszentrum Jülich

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