Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0010.1 |
The Continuum of Drought in Southwestern North America | |
Parsons, Luke A.1,4; Coats, Sloan2; Overpeck, Jonathan T.3 | |
2018-10-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:20页码:8627-8643 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Drought has severe consequences for humans and their environment, yet we have a limited understanding of the drivers of drought across the full range of time scales on which it occurs. Here, the atmosphere and ocean conditions that drive this continuum of drought variability in southwestern North America (SWNA) are studied using the latest observationally based products, paleoclimate reconstructions, and state-of-the-art Earth system model simulations of the last millennium. A novel application of the self-organizing maps (SOM) methodology allows for a visualization of the continuum of climate states coinciding with thousands of droughts of varying lengths in last millennium simulations from the Community Earth System Model (CESM), the Goddard Institute for Space Studies Model E2-R (GISS E2-R), and eight other members from phase 5 of the Coupled Model Intercomparison Project (CMIP5). It is found that most droughts are associated with a cool Pacific decadal oscillation (PDO) pattern, but persistent droughts can coincide with a variety of ocean-atmosphere states, including time periods showing a warm PDO or weak ocean-atmosphere anomalies. Many CMIP5 models simulate similar SWNA teleconnection patterns, but the SOM analysis demonstrates that models simulate different continuums of ocean-atmosphere states coinciding with droughts of different lengths, suggesting fundamental differences in their drought dynamics. These findings have important implications for our understanding and simulation of the drivers of persistent drought, and for their potential predictability. |
英文关键词 | Atmosphere-ocean interaction Drought Paleoclimate Ensembles General circulation models Climate variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445058600001 |
WOS关键词 | SELF-ORGANIZING MAPS ; WESTERN UNITED-STATES ; PACIFIC DECADAL VARIABILITY ; LAST MILLENNIUM ; CLIMATE VARIABILITY ; CALIFORNIA DROUGHT ; MODEL SIMULATIONS ; PRECIPITATION ; OCEAN ; MEGADROUGHTS |
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/19903 |
专题 | 气候变化 |
作者单位 | 1.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA; 2.Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA; 3.Univ Michigan, Sch Environm & Sustainabil, Ann Arbor, MI 48109 USA; 4.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Parsons, Luke A.,Coats, Sloan,Overpeck, Jonathan T.. The Continuum of Drought in Southwestern North America[J]. JOURNAL OF CLIMATE,2018,31(20):8627-8643. |
APA | Parsons, Luke A.,Coats, Sloan,&Overpeck, Jonathan T..(2018).The Continuum of Drought in Southwestern North America.JOURNAL OF CLIMATE,31(20),8627-8643. |
MLA | Parsons, Luke A.,et al."The Continuum of Drought in Southwestern North America".JOURNAL OF CLIMATE 31.20(2018):8627-8643. |
条目包含的文件 | 条目无相关文件。 |
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