Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data
Water vapour is an important component in the radiative balance of the polar atmosphere. We present a study covering fifteen years of data of tropospheric humidity profiles measured with standard radiosondes at Ny-Ålesund (78°55' N 11°52' E) during the period from 1991 to 2006. It is well-...
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ftdoajarticles:oai:doaj.org/article:72176540d6d4468590f94912aec84ff3 2023-05-15T14:56:05+02:00 Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data R. Treffeisen R. Krejci J. Ström A. C. Engvall A. Herber L. Thomason 2007-01-01T00:00:00Z https://doaj.org/article/72176540d6d4468590f94912aec84ff3 EN eng Copernicus Publications http://www.atmos-chem-phys.net/7/2721/2007/acp-7-2721-2007.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/72176540d6d4468590f94912aec84ff3 Atmospheric Chemistry and Physics, Vol 7, Iss 10, Pp 2721-2732 (2007) Physics QC1-999 Chemistry QD1-999 article 2007 ftdoajarticles 2022-12-31T13:12:52Z Water vapour is an important component in the radiative balance of the polar atmosphere. We present a study covering fifteen years of data of tropospheric humidity profiles measured with standard radiosondes at Ny-Ålesund (78°55' N 11°52' E) during the period from 1991 to 2006. It is well-known that relative humidity measurements are less reliable at low temperatures when measured with standard radiosondes. The data was corrected for errors and used to determine key characteristic features of the vertical and temporal relative humidity evolution in the Arctic troposphere over Ny-Ålesund. We present frequencies of occurrence of ice-supersaturation layers in the troposphere, their vertical span, temperature and statistical distribution. Supersaturation with respect to ice shows a clear seasonal behaviour. In winter, (October–February) it occurred in 19% of all cases and less frequently in spring (March–May 12%), and summer (June–September, 9%). Finally, the results are compared with findings from the SAGE II satellite instrument on subvisible clouds. Article in Journal/Newspaper Arctic Ny Ålesund Ny-Ålesund Svalbard Directory of Open Access Journals: DOAJ Articles Arctic Ny-Ålesund Svalbard |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 R. Treffeisen R. Krejci J. Ström A. C. Engvall A. Herber L. Thomason Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Water vapour is an important component in the radiative balance of the polar atmosphere. We present a study covering fifteen years of data of tropospheric humidity profiles measured with standard radiosondes at Ny-Ålesund (78°55' N 11°52' E) during the period from 1991 to 2006. It is well-known that relative humidity measurements are less reliable at low temperatures when measured with standard radiosondes. The data was corrected for errors and used to determine key characteristic features of the vertical and temporal relative humidity evolution in the Arctic troposphere over Ny-Ålesund. We present frequencies of occurrence of ice-supersaturation layers in the troposphere, their vertical span, temperature and statistical distribution. Supersaturation with respect to ice shows a clear seasonal behaviour. In winter, (October–February) it occurred in 19% of all cases and less frequently in spring (March–May 12%), and summer (June–September, 9%). Finally, the results are compared with findings from the SAGE II satellite instrument on subvisible clouds. |
format |
Article in Journal/Newspaper |
author |
R. Treffeisen R. Krejci J. Ström A. C. Engvall A. Herber L. Thomason |
author_facet |
R. Treffeisen R. Krejci J. Ström A. C. Engvall A. Herber L. Thomason |
author_sort |
R. Treffeisen |
title |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data |
title_short |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data |
title_full |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data |
title_fullStr |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data |
title_full_unstemmed |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 15 years of radiosonde data |
title_sort |
humidity observations in the arctic troposphere over ny-ålesund, svalbard based on 15 years of radiosonde data |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
https://doaj.org/article/72176540d6d4468590f94912aec84ff3 |
geographic |
Arctic Ny-Ålesund Svalbard |
geographic_facet |
Arctic Ny-Ålesund Svalbard |
genre |
Arctic Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund Svalbard |
op_source |
Atmospheric Chemistry and Physics, Vol 7, Iss 10, Pp 2721-2732 (2007) |
op_relation |
http://www.atmos-chem-phys.net/7/2721/2007/acp-7-2721-2007.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/72176540d6d4468590f94912aec84ff3 |
_version_ |
1766328128390561792 |