DOI: 10.1175/JCLI-D-16-0766.1
Scopus记录号: 2-s2.0-85028510336
论文题名: Precipitation, temperature, and teleconnection signals across the combined North American, monsoon Asia, and old world drought atlases
作者: Baek S.H. ; Smerdon J.E. ; Coats S. ; Williams A.P. ; Cook B.I. ; Cook E.R. ; Seager R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 18 起始页码: 7141
结束页码: 7155
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric thermodynamics
; Climate change
; Correlation methods
; Drought
; Forestry
; Atlantic multidecadal oscillations
; Climate variability
; Multi-decadal time scale
; North Atlantic oscillations
; Pacific decadal oscillation
; Pearson's correlation coefficients
; Seasonal variability
; Surface air temperatures
; Climatology
英文摘要: The tree-ring-based North American Drought Atlas (NADA), Monsoon Asia Drought Atlas (MADA), and Old World Drought Atlas (OWDA) collectively yield a near-hemispheric gridded reconstruction of hydroclimate variability over the last millennium. To test the robustness of the large-scale representation of hydroclimate variability across the drought atlases, the joint expression of seasonal climate variability and teleconnections in the NADA, MADA, and OWDA are compared against two global, observation-based PDSI products. Predominantly positive (negative) correlations are determined between seasonal precipitation (surface air temperature) and collocated tree-ring-based PDSI, with average Pearson's correlation coefficients increasing in magnitude from boreal winter to summer. For precipitation, these correlations tend to be stronger in the boreal winter and summer when calculated for the observed PDSI record, while remaining similar for temperature. Notwithstanding these differences, the drought atlases robustly express teleconnection patterns associated with El Niño-Southern Oscillation (ENSO), the North Atlantic Oscillation (NAO), the Pacific decadal oscillation (PDO), and the Atlantic multidecadal oscillation (AMO). These expressions exist in the drought atlas estimates of boreal summer PDSI despite the fact that these modes of climate variability are dominant in boreal winter, with the exception of the AMO. ENSO and NAO teleconnection patterns in the drought atlases are particularly consistent with their well-known dominant expressions in boreal winter and over theOWDAdomain, respectively. Collectively, the findings herein confirm that the joint Northern Hemisphere drought atlases robustly reflect large-scale patterns of hydroclimate variability on seasonal to multidecadal time scales over the twentieth century and are likely to provide similarly robust estimates of hydroclimate variability prior to the existence of widespread instrumental data. © 2017 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48720
Appears in Collections: 气候减缓与适应 气候变化与战略
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作者单位: Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States; NASA Goddard Institute for Space Studies, New York, NY, United States
Recommended Citation:
Baek S.H.,Smerdon J.E.,Coats S.,et al. Precipitation, temperature, and teleconnection signals across the combined North American, monsoon Asia, and old world drought atlases[J]. Journal of Climate,2017-01-01,30(18)