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Mean vertical profiles of temperature and absolute humidity from a 12-year radiosounding data set at Terra Nova Bay (Antarctica)

TitleMean vertical profiles of temperature and absolute humidity from a 12-year radiosounding data set at Terra Nova Bay (Antarctica)
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2004
AuthorsTomasi, C., Cacciari A., Vitale V., Lupi A., Lanconelli C., Pellegrini A., and Grigioni P.
JournalAtmospheric Research
Volume71
Pagination139-169
ISSN01698095
Keywordsantarctica, Arctic and Antarctic, Atmospheric humidity, atmospheric moisture, Data acquisition, Data sets, East Antarctica, error correction, Heat exchange processes, Heat exchangers, humidity, Moisture, Moisture parameters, Parameter estimation, Radiation, radiosonde, Sensors, stratosphere, Temperature control, temperature profile, Terra Nova Bay, troposphere, upper atmosphere, Vertical profile, World
Abstract

A set of 1330 radiosoundings was performed at the Italian station of Terra Nova Bay in Antarctica during 12 measurement campaigns from 1987 to 1998. These measurements were separately analyzed for the various 10-day periods from mid-October to mid-February, to determine the mean vertical profiles of air pressure and temperature in the troposphere and lower stratosphere, and those of moisture parameters in the troposphere. The temperature data were corrected for the errors due to radiation and heat exchange processes and for the lag errors of the sensor. Due to temperature dependence and other dry bias effects, the humidity errors were also taken into account. The tropospheric temperature was found to present average values of its vertical gradient varying between -5.4 and -6.3 K/km, while its minimum height associated with the tropopause gradually lowered from 13.7 to 7.9 km. Total water vapor content increased correspondingly from 0.12 to 0.36 g cm-2 during the first two months and decreased to 0.26 g cm-2 in the following period. Stratospheric temperature was observed to increase during the first 2 months by about 15 K in the region below the 24-km height and to appreciably decrease at upper levels, maintaining almost stable features during the subsequent months. © 2004 Elsevier B.V. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-13944258566&doi=10.1016%2fj.atmosres.2004.03.009&partnerID=40&md5=c6f43efd30132106300548f52e39b73c
DOI10.1016/j.atmosres.2004.03.009
Citation KeyTomasi2004139