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Titre du document / Document title

Antarctic atmospheric temperature trend patterns from satellite observations

Auteur(s) / Author(s)

JOHANSON Celeste M. (1) ; QIANG FU (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Atmospheric Sciences, University of Washington, Seattle, Washington, ETATS-UNIS

Résumé / Abstract

Tropospheric temperatures in the Antarctic are retrieved by linearly combining satellite-borne Microwave Sounding Unit (MSU) channels 2 and 4 observations. We show good agreement between satellite-inferred temperature trends and radiosonde observations. It is illustrated that the Antarctic troposphere has cooled in the summer and fall seasons since 1979, in agreement with Thompson and Solomon (2002). It is shown that significant tropospheric warming prevails during Antarctic winters and springs, but we also find significant winter cooling over half of East Antarctica. We find the largest winter tropospheric warming of about 0.6 K/decade for 1979-2005 between 120°Wand 180°W. Homogeneous winter tropospheric warming over Antarctica from the ERA-40 reanalysis is not supported by the MSU observations. While MSU stratospheric temperatures exhibit the expected large cooling during the spring and summer seasons, we also find large stratospheric warming over half the southern hemisphere high latitudes in the winter and spring seasons.

Revue / Journal Title

Geophysical research letters    ISSN  0094-8276   CODEN GPRLAJ 

Source / Source

2007, vol. 34, no12, [Note(s): L12703.1-L12703.5] (1/2 p.)

Langue / Language

Anglais

Editeur / Publisher

American Geophysical Union, Washington, DC, ETATS-UNIS  (1974) (Revue)

Mots-clés anglais / English Keywords

polar regions

;

Antarctica

;

East Antarctica

;

Space remote sensing

;

High latitude

;

Southern Hemisphere

;

exhibits

;

stratosphere

;

cooling

;

Spring(season)

;

springs

;

Winter

;

Stratospheric warming

;

Summer

;

channels

;

sounding

;

microwaves

;

satellites

;

troposphere

;

Satellite observation

;

trend-surface analysis

;

Atmospheric temperature

;

Mots-clés français / French Keywords

Région Polaire

;

Antarctique

;

Antarctique Est

;

Télédétection spatiale

;

Haute latitude

;

Hémisphère Sud

;

Exposition

;

Stratosphère

;

Refroidissement

;

Printemps

;

Source

;

Hiver

;

Réchauffement stratosphérique

;

Eté

;

Chenal

;

Sondage

;

Hyperfréquence

;

Satellite

;

Troposphère

;

Observation par satellite

;

Analyse tendance

;

Température atmosphérique

;

Mots-clés espagnols / Spanish Keywords

Antártico

;

Teledetección espacial

;

Alta latitud

;

Hemisferio sur

;

Estratosfera

;

Enfriamiento

;

Primavera

;

Fuente

;

Invierno

;

Calentamiento estratosférico

;

Verano

;

Canal

;

Pozo sondeo

;

Satélite

;

Observación por satélite

;

Análisis tendencia

;

Temperatura atmosférica

;

Localisation / Location

INIST-CNRS, Cote INIST : 16687, 35400015000467.0360

Nº notice refdoc (ud4) : 18948717



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