DOI: 10.1175/JCLI-D-13-00338.1
Scopus记录号: 2-s2.0-84899115168
论文题名: Cloud and radiative balance changes in response to ENSO in observations and models
作者: Radley C. ; Fueglistaler S. ; Donner L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 9 起始页码: 3100
结束页码: 3113
语种: 英语
Scopus关键词: Tropics
; Correlation coefficient
; Outgoing longwave radiation
; Radiative balance
; Radiative effects
; Radiative fluxes
; Sea surface temperature (SST)
; Spatial structure
; Tropical tropospheric warming
; Precipitation (meteorology)
; atmospheric circulation
; atmospheric modeling
; cloud radiative forcing
; El Nino-Southern Oscillation
; longwave radiation
; radiation balance
; sea surface temperature
; shortwave radiation
; troposphere
; warming
英文摘要: The authors use observations and four GFDL AGCMs to analyze the relation between variations in spatial patterns and area-averaged quantities in the top-of-the-atmosphere radiative fluxes, cloud amount, and precipitation related to El Niño over the period 1979-2008. El Niño is associated with an increase in tropical average sea surface temperature of order +0.1K (with a maxima of +0.5 K), large local anomalies of +2K (maxima +6 K), and tropical tropospheric warming of +0.5K (maxima +1 K). The authors find that modelto-observation biases in the base state translate into corresponding biases in anomalies in response to El Niño. The pattern and amplitude of model biases in reflected shortwave (SW) and outgoing longwave radiation (OLR) follows expectations based on their biases in cloud amount: models with a positive cloud amount bias, compared to observations, have too strong local responses to El Niño in cloud amount, SW, OLR, and precipitation. Tropical averageOLRincreases in response to El Niño in observations and models [correlation coefficients (r) with Niño-3.4 index in the range 0.4-0.6]. Weaker correlations are found for SW (r: -0.6 to 0), cloud amount (r: -0.2 to +0.1), and precipitation (r: -0.2 to 0). Compositing El Niño events over the period 2001- 07 yields similar results. These results are consistent with El Niño periods being warmer due to a heat pulse from the ocean, and a weak response in clouds and their radiative effect. These weak responses occur despite a large rearrangement in the spatial structure of the tropical circulation, and despite substantial differences in the mean state of observations and models. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50988
Appears in Collections: 气候变化事实与影响
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作者单位: Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton University, Princeton, NJ, United States
Recommended Citation:
Radley C.,Fueglistaler S.,Donner L.. Cloud and radiative balance changes in response to ENSO in observations and models[J]. Journal of Climate,2014-01-01,27(9)