Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0019.1 |
Seasonal Variability in Precipitation in Central and Southern Chile: Modulation by the South Pacific High | |
Barrett, Bradford S.1,2; Hameed, Sultan3 | |
2017 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Mexico |
英文摘要 | Monthly precipitation in Chile (308-558S) was found to vary by intensity, latitude, and longitude of the South Pacific high (SPH). In austral winter, precipitation was higher when the SPH was weaker and when it was centered farther west. In austral spring, precipitation was higher when the SPH was weaker, similar to winter. However, spring precipitation was not found to be related to SPH longitude, and higher precipitation was found when the SPH was centered farther north. In austral summer, no relationship was found between precipitation and either SPH intensity or longitude, but positive correlations were found between precipitation and latitude of the SPH. In austral autumn, correlation patterns between precipitation and all three SPH metrics more closely resembled those seen in winter. The results of a multiple linear regression confirmed the importance of two SPH metrics (intensity and longitude) and the unimportance of a third SPH metric (latitude) in understanding variability in winter, summer, and autumn precipitation in central and southern Chile. In spring, regression results confirmed a relationship between precipitation and SPH intensity and latitude. Furthermore, the SPH intensity and longitude in winter combined to hindcast monthly precipitation with a better goodness of fit than five El Nino-Southern Oscillation metrics traditionally related to Chilean precipitation. Anomalies of lower-tropospheric circulation and vertical velocities were found to support the observed relationships between SPH and precipitation. Based on these results, a physical mechanism is proposed that employs the SPH as a metric to aid in understanding variability in precipitation in central and south-central Chile in all seasons. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000391855700005 |
WOS关键词 | GLOBAL PRECIPITATION ; WINTER PRECIPITATION ; RAINFALL VARIABILITY ; GAUGE OBSERVATIONS ; CONVERGENCE ZONE ; OSCILLATION ; ANDES ; PREDICTABILITY ; CLIMATE ; EVENTS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21274 |
专题 | 气候变化 |
作者单位 | 1.US Naval Acad, Dept Oceanog, 572C Holloway Rd, Annapolis, MD 21402 USA; 2.Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City, DF, Mexico; 3.SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA |
推荐引用方式 GB/T 7714 | Barrett, Bradford S.,Hameed, Sultan. Seasonal Variability in Precipitation in Central and Southern Chile: Modulation by the South Pacific High[J]. JOURNAL OF CLIMATE,2017,30(1). |
APA | Barrett, Bradford S.,&Hameed, Sultan.(2017).Seasonal Variability in Precipitation in Central and Southern Chile: Modulation by the South Pacific High.JOURNAL OF CLIMATE,30(1). |
MLA | Barrett, Bradford S.,et al."Seasonal Variability in Precipitation in Central and Southern Chile: Modulation by the South Pacific High".JOURNAL OF CLIMATE 30.1(2017). |
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