On the determination of climate feedbacks from ERBE data

Details On the determination of climate feedbacks from ERBE data On the determination of climate feedbacks from ERBE data

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3616705l&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 16, CiteID L16705

Physics

14

Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Radiative Processes, Atmospheric Processes: Clouds And Cloud Feedbacks, Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Global Change: Global Climate Models (3337, 4928)

Scientific paper

Climate feedbacks are estimated from fluctuations in the outgoing radiation budget from the latest version of Earth Radiation Budget Experiment (ERBE) nonscanner data. It appears, for the entire tropics, the observed outgoing radiation fluxes increase with the increase in sea surface temperatures (SSTs). The observed behavior of radiation fluxes implies negative feedback processes associated with relatively low climate sensitivity. This is the opposite of the behavior of 11 atmospheric models forced by the same SSTs. Therefore, the models display much higher climate sensitivity than is inferred from ERBE, though it is difficult to pin down such high sensitivities with any precision. Results also show, the feedback in ERBE is mostly from shortwave radiation while the feedback in the models is mostly from longwave radiation. Although such a test does not distinguish the mechanisms, this is important since the inconsistency of climate feedbacks constitutes a very fundamental problem in climate prediction.

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