DOI: 10.1175/JCLI-D-15-0667.1
Scopus记录号: 2-s2.0-84971426787
论文题名: What surface observations are important for separating the influences of anthropogenic aerosols from other forcings?
作者: Yan X. ; DelSole T. ; Tippett M.K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 11 起始页码: 4165
结束页码: 4184
语种: 英语
Scopus关键词: Aerosols
; Atmospheric temperature
; Climate models
; Climatology
; Greenhouse gases
; Sea level
; Signal to noise ratio
; Surface properties
; Anthropogenic aerosols
; Anthropogenic effects
; Climate variability
; Latitudinal gradients
; Optimal fingerprinting
; Statistical techniques
; Surface temperatures
; Temporal information
; Climate change
; aerosol
; anthropogenic effect
; climate change
; climate forcing
; climate variation
; climatology
; greenhouse gas
; meteorology
; sea level pressure
; statistical analysis
; surface temperature
英文摘要: This paper shows that joint temperature-precipitation information over a global domain provides a more accurate estimate of aerosol forced responses in climate models than does any other combination of temperature, precipitation, or sea level pressure. This fact is demonstrated using a new quantity called potential detectability, which measures the extent to which a forced response can be detected in a model. In particular, this measure can be evaluated independently of observations and therefore permits efficient exploration of a large number of variable combinations before performing optimal fingerprinting on observations. This paper also shows that the response to anthropogenic aerosol forcing can be separated from that of other forcings using only spatial structure alone, leaving the time variation of the response to be inferred from data, thereby demonstrating that temporal information is not necessary for detection. The spatial structure of the forced response is derived by maximizing the signal-to-noise ratio. For single variables, the north-south hemispheric gradient and equator-to-pole latitudinal gradient are important spatial structures for detecting anthropogenic aerosols in some models but not all. Sea level pressure is not an independent detection variable because it is derived partly from surface temperature. In no case does sea level pressure significantly enhance potential detectability beyond that already possible using surface temperature. Including seasonal or land-sea contrast information does not significantly enhance detectability of anthropogenic aerosol responses relative to annual means over global domains. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49901
Appears in Collections: 气候变化事实与影响
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作者单位: George Mason University, Fairfax, VA, United States; Center for Ocean-Land-Atmosphere Studies, Calverton, MD, United States; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Center of Excellence for Climate Change Research, Department of Meteorology, King Abdulaziz University, Jeddah, Saudi Arabia
Recommended Citation:
Yan X.,DelSole T.,Tippett M.K.. What surface observations are important for separating the influences of anthropogenic aerosols from other forcings?[J]. Journal of Climate,2016-01-01,29(11)