Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD030424 |
Ocean-Atmosphere Trajectories of Extended Drought in Southwestern North America | |
Parsons, Luke A.1; Coats, Sloan2 | |
2019-08-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:16页码:8953-8971 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Multiyear droughts are a common occurrence in southwestern North America (SWNA), but it is unclear what causes these persistent dry periods. The ocean-atmosphere conditions coinciding with droughts have traditionally been studied using correlation and composite methods, which suggest that cool conditions in the tropical Pacific are associated with SWNA droughts and warm conditions are associated with wet periods in SWNA. Nevertheless, the extent to which multiyear droughts are truly consistent with this paradigm remains unknown. This is, in part, because the temporal trajectory of ocean-atmosphere conditions during these dry periods have not been sufficiently characterized. Here we examine the continuum of ocean-atmosphere trajectories before, during, and after multiyear droughts in SWNA using observation-based data and an ensemble of climate model simulations from the Community Earth System Model. An examination of sea surface temperature patterns at the beginning, middle, and end of SWNA droughts shows that an El Nino event tends to precede SWNA droughts, a cool tropical Pacific occurs during droughts, and central Pacific El Nino events end droughts. However, moderate El Nino events can occur in the middle of persistent droughts, so a warm tropical Pacific does not always end these dry periods. These findings are important for drought predictability and emphasize the need to improve simulations of the magnitude, life cycle, and frequency of occurrence of El Nino events. |
英文关键词 | drought climate dynamics teleconnections southwest climate model tropical Pacific |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490762800005 |
WOS关键词 | SELF-ORGANIZING MAPS ; SEA-SURFACE TEMPERATURE ; EL-NINO ; LAST MILLENNIUM ; PRECIPITATION VARIABILITY ; CALIFORNIA PRECIPITATION ; WINTER PRECIPITATION ; COLD-TONGUE ; PACIFIC ; CLIMATE |
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/186141 |
专题 | 气候变化 |
作者单位 | 1.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 2.Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA |
推荐引用方式 GB/T 7714 | Parsons, Luke A.,Coats, Sloan. Ocean-Atmosphere Trajectories of Extended Drought in Southwestern North America[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(16):8953-8971. |
APA | Parsons, Luke A.,&Coats, Sloan.(2019).Ocean-Atmosphere Trajectories of Extended Drought in Southwestern North America.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(16),8953-8971. |
MLA | Parsons, Luke A.,et al."Ocean-Atmosphere Trajectories of Extended Drought in Southwestern North America".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.16(2019):8953-8971. |
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