Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025721 |
Characterizing extreme and oppressive heat waves in Illinois | |
Ford, Trent W.; Schoof, Justin T. | |
2017-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Heat waves are characteristic features of summertime climate in the Midwest United States and can have significant agricultural, hydrological, and societal impacts. Historically, heat waves in the Midwest state of Illinois have been either extreme (high temperature and low humidity) or oppressive (high temperature and high humidity) in nature, but our knowledge of the factors determining which heat wave type occurs is limited. We use self-organizing maps to classify synoptic-scale atmospheric circulation patterns associated with oppressive and extreme heat events and analysis of variance to evaluate the atmospheric and land surface features responsible for differences in humidity that characterize the two. We find that the majority of extreme and oppressive heat events are associated with similar synoptic-scale atmospheric conditions. Additionally, both locally evaporated moisture and advected moisture sources were important for determining which of the two heat wave types occurred. Specifically, oppressive heat waves were characterized by abundant antecedent precipitation, surplus soil moisture, and elevated evapotranspiration and related atmospheric humidity. Lower humidity levels during extreme heat wave events were driven by relative reductions in evapotranspiration due to limited soil water content. Overall, our results suggest that the onset of heat waves in Illinois is primarily driven by circulation features in the upper atmosphere; however, the distinction of extreme or oppressive heat wave is due to differences in boundary layer humidity, driven in part by land surface moisture availability for evapotranspiration. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396116900007 |
WOS关键词 | MIDWESTERN UNITED-STATES ; SELF-ORGANIZING MAP ; DEW-POINT EVENTS ; EQUIVALENT TEMPERATURE ; SYNOPTIC CLIMATOLOGY ; SOIL-MOISTURE ; PRECIPITATION ; SCALE ; TRENDS ; MORTALITY |
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/33634 |
专题 | 气候变化 |
作者单位 | Southern Illinois Univ, Dept Geog & Environm Resources, Carbondale, IL 62901 USA |
推荐引用方式 GB/T 7714 | Ford, Trent W.,Schoof, Justin T.. Characterizing extreme and oppressive heat waves in Illinois[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(2). |
APA | Ford, Trent W.,&Schoof, Justin T..(2017).Characterizing extreme and oppressive heat waves in Illinois.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(2). |
MLA | Ford, Trent W.,et al."Characterizing extreme and oppressive heat waves in Illinois".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.2(2017). |
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