DOI: 10.1002/jgrd.50820
论文题名: Impact of Pacific and Atlantic sea surface temperatures on interannual and decadal variations of GRACE land water storage in tropical South America
作者: De Linage C. ; Kim H. ; Famiglietti J.S. ; Yu J.-Y.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 19 起始页码: 10811
结束页码: 10829
语种: 英语
英文关键词: Amazon
; El Niñ
; o Southern Oscillation
; GRACE
; MSSA
; teleconnections
; Tropical North Atlantic
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Deforestation
; Melting
; Recharging (underground waters)
; Tropics
; Amazon
; GRACE
; MSSA
; North Atlantic
; Southern oscillation
; Teleconnections
; Oceanography
; annual variation
; covariance analysis
; decadal variation
; deforestation
; El Nino-Southern Oscillation
; GRACE
; land surface
; melting
; runoff
; sea surface temperature
; temporal variation
; Atlantic Ocean
; Pacific Ocean
; South America
英文摘要: We analyze 10 years of Gravity Recovery and Climate Experiment (GRACE) terrestrial water storage anomalies (TWSAs) over tropical South America along with seven climate indices linked to equatorial Pacific and tropical Atlantic oceans sea surface temperatures (SSTs) using a multichannel singular spectrum analysis and lagged cross correlations. We focus on the interannual, nonlinear modes of covariability between TWSAs and SSTs. By comparing the relative distributions of the leading modes, we identify teleconnections between TWSAs, Pacific and Atlantic SSTs at different time periods. Thus, the northern and northeastern regions of tropical South America are mainly influenced by Pacific SSTs, while the central and western Amazon regions are more influenced by Atlantic SSTs. The former regions are more sensitive to central Pacific SSTs than to eastern Pacific SSTs. A quasi-biennial mode explains the largest part (27%) of the residual, interannual cross covariance and is found both in the El Niño-Southern Oscillation and in the Atlantic meridional mode. A trend-like mode explains the second largest part (24%) of the residual cross covariance and may be caused by the following: (1) the decadal variability in the North Pacific climate, as expressed by the negative trend in the Pacific decadal oscillation and by increased water storage in northern and northeastern South America, (2) the melting of Andean glaciers in Peru and Bolivia due to man-induced increase in land surface temperatures, and (3) the land use/cover changes after deforestation leading to increased runoff and groundwater recharge, expressed by increased water storage in southern Amazon regions. Key Points A quasi-biennial mode is found both in GRACE and in Pacific and Atlantic SST Observed decadal trends may be due to PDO, deforestation or glacier melting NE (central/W) Amazon is influenced by central Pacific (tropical N Atlantic) SST ©2013. American Geophysical Union. All Rights Reserved. 资助项目: AGS-1233542
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63287
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Earth System Science, University of California, 2224 Croul Hall, Irvine, CA 92697-3100, United States; Institute of Industrial Science, University of Tokyo, Tokyo, Japan; University of California, Center for Hydrological Modeling, Irvine CA, United States
Recommended Citation:
De Linage C.,Kim H.,Famiglietti J.S.,et al. Impact of Pacific and Atlantic sea surface temperatures on interannual and decadal variations of GRACE land water storage in tropical South America[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)