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| Titel |
Evaluation of ACCMIP outgoing longwave radiation from tropospheric ozone using TES satellite observations |
| VerfasserIn |
K. W. Bowman, D. T. Shindell  , H. M. Worden, J. F. Lamarque, P. J. Young, D. S. Stevenson, Z. Qu, M. Torre, D. Bergmann, P. J. Cameron-Smith, W. J. Collins, R. Doherty, S. B. Dalsøren, G. Faluvegi, G. Folberth, L. W. Horowitz, B. M. Josse, Y. H. Lee, I. A. MacKenzie, G. Myhre, T. Nagashima, V. Naik, D. A. Plummer, S. T. Rumbold, R. B. Skeie, S. A. Strode, K. Sudo, S. Szopa, A. Voulgarakis, G. Zeng, S. S. Kulawik, A. M. Aghedo, J. R. Worden |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 8 ; Nr. 13, no. 8 (2013-04-18), S.4057-4072 |
| Datensatznummer |
250018595
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| Publikation (Nr.) |
 copernicus.org/acp-13-4057-2013.pdf |
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| Zusammenfassung |
| We use simultaneous observations of tropospheric ozone and outgoing longwave
radiation (OLR) sensitivity to tropospheric ozone from the Tropospheric
Emission Spectrometer (TES) to evaluate model tropospheric ozone and its
effect on OLR simulated by a suite of chemistry-climate models that
participated in the Atmospheric Chemistry and Climate Model Intercomparison
Project (ACCMIP). The ensemble mean of ACCMIP models show a persistent but
modest tropospheric ozone low bias (5–20 ppb) in the Southern Hemisphere
(SH) and modest high bias (5–10 ppb) in the Northern Hemisphere (NH)
relative to TES ozone for 2005–2010. These ozone biases have a
significant impact on the OLR. Using TES instantaneous radiative kernels
(IRK), we show that the ACCMIP ensemble mean tropospheric ozone low bias
leads up to 120 mW m−2 OLR high bias locally but zonally compensating
errors reduce the global OLR high bias to 39 ± 41 m Wm−2
relative to TES data. We show that there is a correlation (R2 = 0.59)
between the magnitude of the ACCMIP OLR bias and the deviation of the ACCMIP
preindustrial to present day (1750–2010) ozone radiative forcing (RF) from
the ensemble ozone RF mean. However, this correlation is driven primarily by
models whose absolute OLR bias from tropospheric ozone exceeds
100 m Wm−2. Removing these models leads to a mean ozone radiative
forcing of 394 ± 42 m Wm−2. The mean is about the same and the
standard deviation is about 30% lower than an ensemble ozone RF of
384 ± 60 m Wm−2 derived from 14 of the 16 ACCMIP models reported
in a companion ACCMIP study. These results point towards a profitable
direction of combining satellite observations and chemistry-climate model
simulations to reduce uncertainty in ozone radiative forcing. |
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