Search: L773:1680 7316 OR L773:1680 7324 >
On the linkage betw...
-
Achtert, Peggy,1982-Stockholms universitet,Meteorologiska institutionen (MISU)
(author)
On the linkage between tropospheric and Polar Stratospheric clouds in the Arctic as observed by space-borne lidar
- Article/chapterEnglish2012
Publisher, publication year, extent ...
-
2012-04-25
-
Copernicus GmbH,2012
-
printrdacarrier
Numbers
-
LIBRIS-ID:oai:DiVA.org:su-79722
-
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-79722URI
-
https://doi.org/10.5194/acp-12-3791-2012DOI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:art swepub-publicationtype
Notes
-
AuthorCount:4;
-
The type of Polar stratospheric clouds (PSCs) as well as their temporal and spatial extent are important for the occurrence of heterogeneous reactions in the polar stratosphere. The formation of PSCs depends strongly on temperature. However, the mechanisms of the formation of solid PSCs are still poorly understood. Recent satellite studies of Antarctic PSCs have shown that their formation can be associated with deep-tropospheric clouds which have the ability to cool the lower stratosphere radiatively and/or adiabatically. In the present study, lidar measurements aboard the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite were used to investigate whether the formation of Arctic PSCs can be associated with deep-tropospheric clouds as well. Deep-tropospheric cloud systems have a vertical extent of more than 6.5 km with a cloud top height above 7 km altitude. PSCs observed by CALIPSO during the Arctic winter 2007/2008 were classified according to their type (STS, NAT, or ice) and to the kind of underlying tropospheric clouds. Our analysis reveals that 172 out of 211 observed PSCs occurred in connection with tropospheric clouds. 72% of these 172 observed PSCs occurred above deep-tropospheric clouds. We also find that the type of PSC seems to be connected to the characteristics of the underlying tropospheric cloud system. During the Arctic winter 2007/2008 PSCs consisting of ice were mainly observed in connection with deep-tropospheric cloud systems while no ice PSC was detected above cirrus. Furthermore, we find no correlation between the occurrence of PSCs and the top temperature of tropospheric clouds. Thus, our findings suggest that Arctic PSC formation is connected to adiabatice cooling, i.e. dynamic effects rather than radiative cooling.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Karlsson Andersson, M.Stockholms universitet,Meteorologiska institutionen (MISU)
(author)
-
Khosrawi, FarahnazStockholms universitet,Meteorologiska institutionen (MISU)(Swepub:su)fkhos
(author)
-
Gumbel, JörgStockholms universitet,Meteorologiska institutionen (MISU)(Swepub:su)jgumb
(author)
-
Stockholms universitetMeteorologiska institutionen (MISU)
(creator_code:org_t)
Related titles
-
In:Atmospheric Chemistry And Physics: Copernicus GmbH12:8, s. 3791-37981680-73161680-7324
Internet link
Find in a library
To the university's database