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DOI	10.1007/s00382-016-3462-3
	Precipitation; temperature; and moisture transport variations associated with two distinct ENSO flavors during 1979–2014
	Gu G.; Adler R.F.
发表日期	2019
ISSN	0930-7575
起始页码	7249
结束页码	7265
卷号	52 期号:12
英文摘要	Interannual precipitation and temperature variations during 1979–2014 are investigated by examining the effects of two distinct flavors of the El Niño-Southern Oscillation (ENSO), i.e., the tropical eastern Pacific (EP) and central Pacific (CP) ENSO events. Satellite- and ground-based observations with global coverage are applied including the monthly precipitation data from the Global Precipitation Climatology Project (GPCP) and surface temperature anomalies from the NASA-GISS surface temperature anomaly analysis. Related variations in other water-cycle components including atmospheric moisture transport are also examined by using the outputs from the NASA-Modern Era Retrospective-analysis for Research and Applications (MERRA). While the second leading mode from an EOF analysis of sea surface temperature (SST) anomalies between 30°N and 30°S is dominated by interdecadal-scale variability that is not a focus of this study, the first and third leading modes represent well the EP and CP events, respectively. The corresponding principal components (PC1 and PC3) are then applied as indices to estimate the influences of the two ENSO flavors on various physical components through linear regression. Because of their distinct SST configurations in the tropical Pacific, the two ENSO flavors manifest different spatial features of precipitation anomalies as shown in past studies. Differences can also be readily seen in satellite-retrieved tropospheric layered temperatures and oceanic columnar water vapor content. General agreements between observations and MERRA outputs can be obtained as judged by consistent respective anomalies corresponding to the two ENSO flavors, suggesting that MERRA could provide an accurate account of variations on the interannual time scale. Interannual variations in MERRA vertically integrated moisture transport (VIMT) are further examined to explore possible relations between precipitation and tropospheric moisture transport corresponding to the two flavors during two contrasting seasons: December–March (DJFM) and June–September (JJAS). Anomalies of zonal moisture transport in the deep tropics following the variations in the Pacific Walker Circulation are distinctly different for two ENSO flavors and also manifest evident seasonal variations for each flavor. Differences in the zonal mean VIMT (both zonal and meridional components) are also evident between the two flavors, consistent with the differences in zonal mean precipitation anomalies from both GPCP and MERRA. Furthermore, the ENSO flavors are associated with distinct precipitation anomaly patterns over various land areas, which can be further traced to the differences in their associated VIMT anomalies, particularly during DJFM when the warm ENSO events usually reach their mature phase. © 2016, Springer-Verlag Berlin Heidelberg.
英文关键词	Atmospheric moisture transport; ENSO flavors; Precipitation variations
语种	英语
scopus关键词	air temperature; annual variation; atmospheric moisture; El Nino-Southern Oscillation; moisture flux; precipitation (climatology); sea surface temperature; temperature anomaly; Walker circulation; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (East); Pomatiopsis californica
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146289
作者单位	Earth System Science Interdisciplinary Center, University of Maryland, 5825 University Research Court, Suite 4001, College Park, MD 20740, United States
推荐引用方式 GB/T 7714	Gu G.,Adler R.F.. Precipitation; temperature; and moisture transport variations associated with two distinct ENSO flavors during 1979–2014[J],2019,52(12).
APA	Gu G.,&Adler R.F..(2019).Precipitation; temperature; and moisture transport variations associated with two distinct ENSO flavors during 1979–2014.Climate Dynamics,52(12).
MLA	Gu G.,et al."Precipitation; temperature; and moisture transport variations associated with two distinct ENSO flavors during 1979–2014".Climate Dynamics 52.12(2019).