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Direct thermal radiative forcing of tropospheric aerosol in the Arctic measured by ground based infrared spectrometry
Author(s) -
Ritter Christoph,
Notholt Justus,
Fischer Jürgen,
Rathke Carsten
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl024331
Subject(s) - longwave , environmental science , atmospheric sciences , aerosol , radiative forcing , troposphere , forcing (mathematics) , radiative transfer , arctic , flux (metallurgy) , climatology , meteorology , physics , materials science , geology , optics , oceanography , metallurgy
We present, to our knowledge for the first time in the high Arctic, atmospheric thermal emission spectra recorded by ground‐based FTIR spectrometry revealing an excess emission contribution, which can only be attributed to the presence of tropospheric aerosols. Consideration of direct thermal forcing in climatological sensitive and remote regions as the Arctic seems to be important for more realistic modelling. According to our measurements, the aerosols can alter the flux density of downward longwave radiation by up to +2.99 to +4.66 W m −2 , and the flux density of outgoing longwave radiation by −0.23 to +1.17 W m −2 .