Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0891.1 |
An Objective Classification and Analysis of Upper-Level Coupling to the Great Plains Low-Level Jet over the Twentieth Century | |
Burrows, D. Alex1,2; Ferguson, Craig R.1,2; Campbell, Matthew A.1,2; Xia, Geng1,2; Bosart, Lance F.1 | |
2019-11-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:21页码:7127-7152 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Low-level jets (LLJ) around the world critically support the food, water, and energy security in regions that they traverse. For the purposes of development planning and weather and climate prediction, it is important to improve understanding of how LLJs interact with the land surface and upper-atmospheric flow, and collectively, how LLJs have and may change over time. This study details the development and application of a new automated, dynamical objective classification of upper-atmospheric jet stream coupling based on a merging of the Bonner-Whiteman vertical wind shear classification and the finite-amplitude local wave activity diagnostic. The classification approach is transferable globally, but applied here only for the Great Plains (GP) LLJ (GPLLJ). The analysis spans the period from 1901 to 2010, enabled by the ECMWF climate-quality, coupled Earth reanalysis of the twentieth century. Overall, statistically significant declines in total GPLLJ event frequency over the twentieth century are detected across the entire GP corridor and attributed to declines in uncoupled GPLLJ frequency. Composites of lower- and upper-atmospheric flow are shown to capture major differences in the climatological, coupled GPLLJ, and uncoupled GPLLJ synoptic environments. Detailed analyses for southern, central, and northern GP subregions further highlight synoptic differences between weak and strong GPLLJs and provide quantification of correlations between total, coupled, and uncoupled GPLLJ frequencies and relevant atmospheric anomalies. Because uncoupled GPLLJs tend to be associated with decreased precipitation and low-level wind speed and enhanced U.S. ridge strength, this finding may suggest that support for drought over the twentieth century has waned. |
英文关键词 | North America Synoptic climatology Jets Climate variability Interannual variability Regional effects |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000487426800002 |
WOS关键词 | AMPLITUDE WAVE ACTIVITY ; SEA-ICE MODEL ; WARM-SEASON ; LAND-SURFACE ; PART II ; CLIMATOLOGY ; PRECIPITATION ; VARIABILITY ; DROUGHT ; PACIFIC |
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/188091 |
专题 | 气候变化 |
作者单位 | 1.SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA; 2.SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12222 USA |
推荐引用方式 GB/T 7714 | Burrows, D. Alex,Ferguson, Craig R.,Campbell, Matthew A.,et al. An Objective Classification and Analysis of Upper-Level Coupling to the Great Plains Low-Level Jet over the Twentieth Century[J]. JOURNAL OF CLIMATE,2019,32(21):7127-7152. |
APA | Burrows, D. Alex,Ferguson, Craig R.,Campbell, Matthew A.,Xia, Geng,&Bosart, Lance F..(2019).An Objective Classification and Analysis of Upper-Level Coupling to the Great Plains Low-Level Jet over the Twentieth Century.JOURNAL OF CLIMATE,32(21),7127-7152. |
MLA | Burrows, D. Alex,et al."An Objective Classification and Analysis of Upper-Level Coupling to the Great Plains Low-Level Jet over the Twentieth Century".JOURNAL OF CLIMATE 32.21(2019):7127-7152. |
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