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Humidity observations in the Arctic troposphere over Ny-Alesund, Svalbard based on 15 years of radiosonde data
Vise andre og tillknytning
Ansvarlig organisasjon
2007 (engelsk)Inngår i: Atmospheric Chemistry And Physics, ISSN 1680-7316, E-ISSN 1680-7324, Vol. 7, nr 10, s. 2721-2732Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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-Alesund ( 78 degrees 55 0 N 11 degrees 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-Alesund. 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.

sted, utgiver, år, opplag, sider
Alfred Wegener Inst Polar & Marine Res, D-14473 Potsdam, Germany. Univ Stockholm, Dept Meteorol, S-10691 Stockholm, Sweden. Univ Stockholm, ITM, Dept Appl Environm Sci, S-10691 Stockholm, Sweden. Alfred Wegener Inst Polar & Marine Res, D-27570 Bremerhaven, Germany. NASA, Langley Res Ctr, Hampton, VA 23681 USA., 2007. Vol. 7, nr 10, s. 2721-2732
Forskningsprogram
SWEDARCTIC 2006, Zeppelin; SWEDARCTIC 2007, Zeppelin 2007
Identifikatorer
URN: urn:nbn:se:polar:diva-2317ISI: 000246903900019OAI: oai:DiVA.org:polar-2317DiVA, id: diva2:858295
Tilgjengelig fra: 2015-10-01 Laget: 2015-10-01 Sist oppdatert: 2017-12-01

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