DOI: 10.1175/JCLI-D-12-00482.1
Scopus记录号: 2-s2.0-84876340848
论文题名: Measurement methods affect the observed global dimming and brightening
作者: Wang K. ; Dickinson R.E. ; Ma Q. ; Augustine J.A. ; Wild M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 12 起始页码: 4112
结束页码: 4120
语种: 英语
Scopus关键词: Climate variability
; Data quality control
; Decadal variability
; Instrumentation/sensors
; Short-wave radiation
; Surface observation
; Climatology
; Mathematical models
; Climate control
; climate variation
; data quality
; data set
; decadal variation
; measurement method
; sensor
; shortwave radiation
; solar radiation
英文摘要: Surface incident solar radiation G determines our climate and environment, and has been widely observed with a single pyranometer since the late 1950s. Such observations have suggested a widespread decrease between the 1950s and 1980s (global dimming), that is, at a rate of -3.5 W m-2 decade21 (or -2% decade-1) from 1960 to 1990. Since the early 1990s, the diffuse and direct components of G have been measured independently, and a more accurate G has been calculated by summing these two measurements. Data from this summation method suggest that G increased at a rate of 6.6 W m-2decade-1 (3.6% decade-1) from 1992 to 2002 (brightening) at selected sites. The brightening rates from these studies were also higher than those from a single pyranometer. In this paper, the authors used 17 years (1995-2011) of parallel measurements by the two methods from nearly 50 stations to test whether these two measurement methods of G provide similar long-term trends. The results show that although measurements of G by the two methods agree very well on a monthly time scale, the long-term trend from 1995 to 2011 determined by the single pyranometer is 2-4 W m-2 decade-1 less than that from the summation method. This difference of trends in the observed G is statistically significant. The dependence of trends of G on measurement methods uncovered here has an important implication for the widely reported global dimming and brightening based on datasets collected by different measurement methods; that is, the dimming might have been less if measured with current summation methods. © 2013 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51834
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Department of Geological Sciences, The University of Texas at Austin, Austin, TX, United States; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; NOAA/Earth System Research Laboratory, Boulder, CO, United States; Institute for Atmospheric and Climate Science, ETH Zürich, Zurich, Switzerland
Recommended Citation:
Wang K.,Dickinson R.E.,Ma Q.,et al. Measurement methods affect the observed global dimming and brightening[J]. Journal of Climate,2013-01-01,26(12)