Upper tropospheric water vapour and its interaction with cirrus clouds as seen from IAGOS long-term routine in situ observations
IAGOS (In-service Aircraft for a Global Observing System) performs long-term routine in situ observations of atmospheric chemical composition (O 3 , CO, NO x , NO y , CO 2 , CH 4 ), water vapour, aerosols, clouds, and temperature on a global scale by operating compact instruments on board of passeng...
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Online Access: | http://dx.doi.org/10.1039/c7fd00006e http://pubs.rsc.org/en/content/articlepdf/2017/FD/C7FD00006E |
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crroyalschem:10.1039/c7fd00006e 2024-09-15T18:24:03+00:00 Upper tropospheric water vapour and its interaction with cirrus clouds as seen from IAGOS long-term routine in situ observations Petzold, Andreas Krämer, Martina Neis, Patrick Rolf, Christian Rohs, Susanne Berkes, Florian Smit, Herman G. J. Gallagher, Martin Beswick, Karl Lloyd, Gary Baumgardner, Darrel Spichtinger, Peter Nédélec, Philippe Ebert, Volker Buchholz, Bernhard Riese, Martin Wahner, Andreas 2017 http://dx.doi.org/10.1039/c7fd00006e http://pubs.rsc.org/en/content/articlepdf/2017/FD/C7FD00006E en eng Royal Society of Chemistry (RSC) Faraday Discussions volume 200, page 229-249 ISSN 1359-6640 1364-5498 journal-article 2017 crroyalschem https://doi.org/10.1039/c7fd00006e 2024-08-27T04:20:45Z IAGOS (In-service Aircraft for a Global Observing System) performs long-term routine in situ observations of atmospheric chemical composition (O 3 , CO, NO x , NO y , CO 2 , CH 4 ), water vapour, aerosols, clouds, and temperature on a global scale by operating compact instruments on board of passenger aircraft. The unique characteristics of the IAGOS data set originate from the global scale sampling on air traffic routes with similar instrumentation such that the observations are truly comparable and well suited for atmospheric research on a statistical basis. Here, we present the analysis of 15 months of simultaneous observations of relative humidity with respect to ice (RH ice ) and ice crystal number concentration in cirrus ( N ice ) from July 2014 to October 2015. The joint data set of 360 hours of RH ice – N ice observations in the global upper troposphere and tropopause region is analysed with respect to the in-cloud distribution of RH ice and related cirrus properties. The majority of the observed cirrus is thin with N ice < 0.1 cm −3 . The respective fractions of all cloud observations range from 90% over the mid-latitude North Atlantic Ocean and the Eurasian Continent to 67% over the subtropical and tropical Pacific Ocean. The in-cloud RH ice distributions do not depend on the geographical region of sampling. Types of cirrus origin ( in situ origin, liquid origin) are inferred for different N ice regimes and geographical regions. Most importantly, we found that in-cloud RH ice shows a strong correlation to N ice with slightly supersaturated dynamic equilibrium RH ice associated with higher N ice values in stronger updrafts. Article in Journal/Newspaper North Atlantic Royal Society of Chemistry Faraday Discussions 200 229 249 |
institution |
Open Polar |
collection |
Royal Society of Chemistry |
op_collection_id |
crroyalschem |
language |
English |
description |
IAGOS (In-service Aircraft for a Global Observing System) performs long-term routine in situ observations of atmospheric chemical composition (O 3 , CO, NO x , NO y , CO 2 , CH 4 ), water vapour, aerosols, clouds, and temperature on a global scale by operating compact instruments on board of passenger aircraft. The unique characteristics of the IAGOS data set originate from the global scale sampling on air traffic routes with similar instrumentation such that the observations are truly comparable and well suited for atmospheric research on a statistical basis. Here, we present the analysis of 15 months of simultaneous observations of relative humidity with respect to ice (RH ice ) and ice crystal number concentration in cirrus ( N ice ) from July 2014 to October 2015. The joint data set of 360 hours of RH ice – N ice observations in the global upper troposphere and tropopause region is analysed with respect to the in-cloud distribution of RH ice and related cirrus properties. The majority of the observed cirrus is thin with N ice < 0.1 cm −3 . The respective fractions of all cloud observations range from 90% over the mid-latitude North Atlantic Ocean and the Eurasian Continent to 67% over the subtropical and tropical Pacific Ocean. The in-cloud RH ice distributions do not depend on the geographical region of sampling. Types of cirrus origin ( in situ origin, liquid origin) are inferred for different N ice regimes and geographical regions. Most importantly, we found that in-cloud RH ice shows a strong correlation to N ice with slightly supersaturated dynamic equilibrium RH ice associated with higher N ice values in stronger updrafts. |
format |
Article in Journal/Newspaper |
author |
Petzold, Andreas Krämer, Martina Neis, Patrick Rolf, Christian Rohs, Susanne Berkes, Florian Smit, Herman G. J. Gallagher, Martin Beswick, Karl Lloyd, Gary Baumgardner, Darrel Spichtinger, Peter Nédélec, Philippe Ebert, Volker Buchholz, Bernhard Riese, Martin Wahner, Andreas |
spellingShingle |
Petzold, Andreas Krämer, Martina Neis, Patrick Rolf, Christian Rohs, Susanne Berkes, Florian Smit, Herman G. J. Gallagher, Martin Beswick, Karl Lloyd, Gary Baumgardner, Darrel Spichtinger, Peter Nédélec, Philippe Ebert, Volker Buchholz, Bernhard Riese, Martin Wahner, Andreas Upper tropospheric water vapour and its interaction with cirrus clouds as seen from IAGOS long-term routine in situ observations |
author_facet |
Petzold, Andreas Krämer, Martina Neis, Patrick Rolf, Christian Rohs, Susanne Berkes, Florian Smit, Herman G. J. Gallagher, Martin Beswick, Karl Lloyd, Gary Baumgardner, Darrel Spichtinger, Peter Nédélec, Philippe Ebert, Volker Buchholz, Bernhard Riese, Martin Wahner, Andreas |
author_sort |
Petzold, Andreas |
title |
Upper tropospheric water vapour and its interaction with cirrus clouds as seen from IAGOS long-term routine in situ observations |
title_short |
Upper tropospheric water vapour and its interaction with cirrus clouds as seen from IAGOS long-term routine in situ observations |
title_full |
Upper tropospheric water vapour and its interaction with cirrus clouds as seen from IAGOS long-term routine in situ observations |
title_fullStr |
Upper tropospheric water vapour and its interaction with cirrus clouds as seen from IAGOS long-term routine in situ observations |
title_full_unstemmed |
Upper tropospheric water vapour and its interaction with cirrus clouds as seen from IAGOS long-term routine in situ observations |
title_sort |
upper tropospheric water vapour and its interaction with cirrus clouds as seen from iagos long-term routine in situ observations |
publisher |
Royal Society of Chemistry (RSC) |
publishDate |
2017 |
url |
http://dx.doi.org/10.1039/c7fd00006e http://pubs.rsc.org/en/content/articlepdf/2017/FD/C7FD00006E |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Faraday Discussions volume 200, page 229-249 ISSN 1359-6640 1364-5498 |
op_doi |
https://doi.org/10.1039/c7fd00006e |
container_title |
Faraday Discussions |
container_volume |
200 |
container_start_page |
229 |
op_container_end_page |
249 |
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1810464349383294976 |