| DOI: | 10.1175/JCLI-D-11-00640.1
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| Scopus记录号: | 2-s2.0-84872946004
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| 论文题名: | Observations of climate feedbacks over 2000-10 and comparisons to climate models |
| 作者: | Dessler A.E.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2013
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| 卷: | 26, 期:1 | | 起始页码: | 333
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| 结束页码: | 342
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| 语种: | 英语
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| Scopus关键词: | Climate variation
; Ensemble averages
; Flux measurements
; Internal variability
; Long waves
; Meteorological fields
; Negative temperatures
; Reanalysis
; Spatial patterns
; Thermal damping
; Top of atmospheres
; Water vapor feedbacks
; Atmospheric pressure
; Climate models
; Global warming
; Lasers
; Masers
; Nickel compounds
; Temperature
; Vapors
; Feedback
; climate change
; climate feedback
; climate modeling
; flux measurement
; top of atmosphere
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| 英文摘要: | Feedbacks in response to climate variations during the period 2000-10 have been calculated using reanalysis meteorological fields and top-of-atmosphere flux measurements. Over this period, the climate was stabilized by a strongly negative temperature feedback (̃-3 W m2 K1); climate variations were also amplified by a strong positive water vapor feedback (̃+1.2 W m2 K1) and smaller positive albedo and cloud feedbacks (̃+0.3 and 10.5 W m2 K1, respectively). These observations are compared to two climate model ensembles, one dominated by internal variability (the control ensemble) and the other dominated by long-term global warming (the A1B ensemble). The control ensemble produces global average feedbacks that agree within uncertainties with the observations, as well as producing similar spatial patterns. The most significant discrepancy was in the spatial pattern for the total (shortwave + longwave) cloud feedback. Feedbacks calculated from the A1B ensemble show a stronger negative temperature feedback (due to a stronger lapse-rate feedback), but that is cancelled by a stronger positive water vapor feedback. The feedbacks in the A1B ensemble tend to be more smoothly distributed in space, which is consistent with the differences between El Niñ o-Southern Oscillation (ENSO) climate variations and long-term global warming. The sum of all of the feedbacks, sometimes referred to as the thermal damping rate, is-1.15±0.88 W m2 K1 in the observations and-0.60±0.37 W m2 K1 in the control ensemble.Within the control ensemble, models that more accurately simulate ENSO tend to produce thermal damping rates closer to the observations. The A1B ensemble average thermal damping rate is -1.26 ± 0.45 W m2 K1. © 2013 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/52083
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Department of Atmospheric Sciences, Texas A and M University, College Station, TX, United States
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| Recommended Citation: | |
Dessler A.E.. Observations of climate feedbacks over 2000-10 and comparisons to climate models[J]. Journal of Climate,2013-01-01,26(1)
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