Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 14 years of radiosonde data
International audience Water vapour is an important component in the radiative balance of the polar atmosphere. We present a study covering fourteen-years of data of tropopsheric humidity profiles measured with standard radiosondes at Ny-Ålesund (78°55' N 11°52' E) during the period from 1...
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ftinsu:oai:HAL:hal-00302541v1 2023-11-12T04:12:12+01:00 Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 14 years of radiosonde data Treffeisen, R. Krejci, R. Ström, J. Engvall, A. C. Herber, A. Thomason, L. W. Alfred Wegner Institute for Polar and Marine Research Department of Meteorology Stockholm (MISU) Stockholm University Department of Applied Environmental Science Stockholm (ITM) NASA Langley Research Center Hampton (LaRC) 2007-01-25 https://hal.science/hal-00302541 https://hal.science/hal-00302541/document https://hal.science/hal-00302541/file/acpd-7-1261-2007.pdf en eng HAL CCSD European Geosciences Union hal-00302541 https://hal.science/hal-00302541 https://hal.science/hal-00302541/document https://hal.science/hal-00302541/file/acpd-7-1261-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00302541 Atmospheric Chemistry and Physics Discussions, 2007, 7 (1), pp.1261-1293 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2007 ftinsu 2023-10-25T16:26:36Z International audience Water vapour is an important component in the radiative balance of the polar atmosphere. We present a study covering fourteen-years of data of tropopsheric humidity profiles measured with standard radiosondes at Ny-Ålesund (78°55' N 11°52' E) during the period from 1991 to 2005. It is well known that relative humidity measurements are less reliable at cold temperatures when measured with standard radiosondes. The data were corrected for errors and used to determine key characteristic features of the vertical and temporal RH evolution in the Arctic troposphere over Ny-Ålesund. We present frequency 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 22% of all cases and less frequently in spring (March?May 13%), and summer (June?September, 10%). The results are finally compared with findings from the SAGE II satellite instrument on subvisible clouds. Article in Journal/Newspaper Arctic Ny Ålesund Ny-Ålesund Svalbard Institut national des sciences de l'Univers: HAL-INSU Arctic Ny-Ålesund Svalbard |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Treffeisen, R. Krejci, R. Ström, J. Engvall, A. C. Herber, A. Thomason, L. W. Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 14 years of radiosonde data |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Water vapour is an important component in the radiative balance of the polar atmosphere. We present a study covering fourteen-years of data of tropopsheric humidity profiles measured with standard radiosondes at Ny-Ålesund (78°55' N 11°52' E) during the period from 1991 to 2005. It is well known that relative humidity measurements are less reliable at cold temperatures when measured with standard radiosondes. The data were corrected for errors and used to determine key characteristic features of the vertical and temporal RH evolution in the Arctic troposphere over Ny-Ålesund. We present frequency 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 22% of all cases and less frequently in spring (March?May 13%), and summer (June?September, 10%). The results are finally compared with findings from the SAGE II satellite instrument on subvisible clouds. |
author2 |
Alfred Wegner Institute for Polar and Marine Research Department of Meteorology Stockholm (MISU) Stockholm University Department of Applied Environmental Science Stockholm (ITM) NASA Langley Research Center Hampton (LaRC) |
format |
Article in Journal/Newspaper |
author |
Treffeisen, R. Krejci, R. Ström, J. Engvall, A. C. Herber, A. Thomason, L. W. |
author_facet |
Treffeisen, R. Krejci, R. Ström, J. Engvall, A. C. Herber, A. Thomason, L. W. |
author_sort |
Treffeisen, R. |
title |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 14 years of radiosonde data |
title_short |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 14 years of radiosonde data |
title_full |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 14 years of radiosonde data |
title_fullStr |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 14 years of radiosonde data |
title_full_unstemmed |
Humidity observations in the Arctic troposphere over Ny-Ålesund, Svalbard based on 14 years of radiosonde data |
title_sort |
humidity observations in the arctic troposphere over ny-ålesund, svalbard based on 14 years of radiosonde data |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00302541 https://hal.science/hal-00302541/document https://hal.science/hal-00302541/file/acpd-7-1261-2007.pdf |
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 |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00302541 Atmospheric Chemistry and Physics Discussions, 2007, 7 (1), pp.1261-1293 |
op_relation |
hal-00302541 https://hal.science/hal-00302541 https://hal.science/hal-00302541/document https://hal.science/hal-00302541/file/acpd-7-1261-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782330882427715584 |