Time evolutions of various radiative forcings for the past 150 years estimated by a general circulation model

Toshihiko Takemura, Yoko Tsushima, Tokuta Yokohata, Toru Nozawa, Tatsuya Nagashima, Teruyuki Nakajima

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Time series of the instantaneous radiative forcings for main anthropogenic and natural forcing agents from the year 1850 to 2000 are evaluated at the Earth's surface as well as at the tropopause with an atmospheric general circulation model. This evaluation corresponds to a simulation of 20th century climate with a synthetic coupled atmosphere-ocean general circulation model. The evaluation indicates that the positive radiative forcing at the tropopause rapidly increases from 1910 to 1950 and after 1970 principally due to long-lived greenhouse gases, while the negative radiative forcing at the surface sharply increases between 1955 and 1965 mainly due to the aerosol direct and indirect effects. This study suggests that a simultaneous analysis of changing rates of the radiative forcing both at the tropopause and surface can explain tendencies of changes in the surface air temperature.

Original languageEnglish
Article numberL19705
JournalGeophysical Research Letters
Volume33
Issue number19
DOIs
Publication statusPublished - Oct 2006
Externally publishedYes

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radiative forcing
tropopause
general circulation model
Atmospheric General Circulation Models
evaluation
greenhouses
atmospheric general circulation model
Earth surface
climate
aerosols
oceans
tendencies
greenhouse gas
surface temperature
air temperature
time series
aerosol
atmospheres
atmosphere
air

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Time evolutions of various radiative forcings for the past 150 years estimated by a general circulation model. / Takemura, Toshihiko; Tsushima, Yoko; Yokohata, Tokuta; Nozawa, Toru; Nagashima, Tatsuya; Nakajima, Teruyuki.

In: Geophysical Research Letters, Vol. 33, No. 19, L19705, 10.2006.

Research output: Contribution to journalArticle

Takemura, Toshihiko ; Tsushima, Yoko ; Yokohata, Tokuta ; Nozawa, Toru ; Nagashima, Tatsuya ; Nakajima, Teruyuki. / Time evolutions of various radiative forcings for the past 150 years estimated by a general circulation model. In: Geophysical Research Letters. 2006 ; Vol. 33, No. 19.
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