Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0890.1 |
Polar Mesoscale Cyclone Climatology for the Nordic Seas Based on ERA-Interim | |
Michel, Clio1; Terpstra, Annick; Spengler, Thomas | |
2018-03-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:6页码:2511-2532 |
文章类型 | Article |
语种 | 英语 |
国家 | Norway |
英文摘要 | Polar mesoscale cyclones (PMCs) are automatically detected and tracked over the Nordic seas using the Melbourne University algorithm applied to ERA-Interim. The novelty of this study lies in the length of the dataset (1979-2014), using PMC tracks to infer relationships to large-scale flow patterns, and elucidating the sensitivity to different selection criteria when defining PMCs and polar lows and their genesis environments. The angle between the ambient mean and thermal wind is used to distinguish two different PMC genesis environments. The forward shear environment (thermal and mean wind have the same direction) features typical baroclinic conditions with a temperature gradient at the surface and a strong jet stream at the tropopause. The reverse shear environment (thermal and mean wind have opposite directions) features an occluded cyclone with a barotropic structure throughout the entire troposphere and a low-level jet. In contrast to previous studies, PMC occurrence features neither a significant trend nor a significant link with the North Atlantic Oscillation and the Scandinavian blocking (SB), though the SB negative pattern seems to promote reverse shear PMC genesis. The sea ice extent in the Nordic seas is not associated with overall changes in PMC occurrence but influences the genesis location. Selected cold air outbreak indices and the temperature difference between the sea surface and 500 hPa (SST - T500) show no robust link with PMC occurrence, but the characteristics of forward shear PMCs and their synoptic environments are sensitive to the choice of the SST - T500 threshold. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427447000026 |
WOS关键词 | LOWS ; REPRESENTATION ; REANALYSIS ; ATLANTIC ; IMPACT |
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/20489 |
专题 | 气候变化 |
作者单位 | 1.Univ Bergen, Geophys Inst, Bergen, Norway; 2.Bjerknes Ctr Climate Res, Bergen, Norway |
推荐引用方式 GB/T 7714 | Michel, Clio,Terpstra, Annick,Spengler, Thomas. Polar Mesoscale Cyclone Climatology for the Nordic Seas Based on ERA-Interim[J]. JOURNAL OF CLIMATE,2018,31(6):2511-2532. |
APA | Michel, Clio,Terpstra, Annick,&Spengler, Thomas.(2018).Polar Mesoscale Cyclone Climatology for the Nordic Seas Based on ERA-Interim.JOURNAL OF CLIMATE,31(6),2511-2532. |
MLA | Michel, Clio,et al."Polar Mesoscale Cyclone Climatology for the Nordic Seas Based on ERA-Interim".JOURNAL OF CLIMATE 31.6(2018):2511-2532. |
条目包含的文件 | 条目无相关文件。 |
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