Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-017-3630-0 |
Moisture sources and pathways associated with the spatial variability of seasonal extreme precipitation over Canada | |
Tan, Xuezhi1,2; Gan, Thian Yew1; Chen, Yongqin David3 | |
2018 | |
发表期刊 | CLIMATE DYNAMICS
![]() |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:629-640 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Peoples R China |
英文摘要 | Nine regions with spatially coherent seasonal 3-day total precipitation extremes across Canada were identified using a clustering method that is compliant to the extreme value theory. Using storm back-trajectory analyses, we then identified possible moisture sources and pathways that are conducive to occurrences of seasonal extreme precipitation events in four seasons for the nine regions identified. Moisture pathways for all extreme precipitation events were clustered to nine dominant moisture pathway patterns using the self-organizing map method. Results show that horizontal moisture pathway patterns and their occurrences were not evidently different between seasons. However, warm (summer and fall) and cold (winter and spring) seasons show considerable differences in the spreading of moisture sources in all nine regions, even though many sources do not frequently contribute to extreme precipitation events. In all four seasons, terrestrial evapotranspiration had provided major moisture sources to many extreme precipitation events occurred in inland regions. Central Canada had received more widespread moisture sources over surrounding oceans of North America than western and eastern Canada, because of more diverse moisture pathway patterns for central Canada that transport moisture from all surrounding oceans to central Canada. Extreme precipitation in southwestern Canada mainly resulted from atmospheric rivers over the North Pacific Ocean. For northwestern Canada, moisture pathway patterns were from the northern Pacific, Arctic and northern Atlantic oceans, even though more than 78% of trajectories for northwestern Canada were from the North Pacific. Westerlies from the North Pacific Ocean and northern polar jet streams controlled dominant pathways to central and eastern Canada. More extreme precipitation events over Canada were fed by the Arctic Ocean in warm than in cold seasons. |
英文关键词 | Seasonal extreme precipitation Backtrajectory analyses Moisture sources Moisture pathways Regionalization |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422908700039 |
WOS关键词 | ATMOSPHERIC WATER-VAPOR ; MACKENZIE RIVER-BASIN ; SELF-ORGANIZING MAP ; TROPICAL MOISTURE ; BRITISH-COLUMBIA ; RAINFALL EVENTS ; HEAVY RAINFALL ; CLIMATE-CHANGE ; UNITED-STATES ; TRENDS |
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/35331 |
专题 | 气候变化 |
作者单位 | 1.Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2, Canada; 2.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China; 3.Chinese Univ Hong Kong, Inst Environm Energy & Sustainabil, Dept Geog & Resource Management, Sha Tin, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Tan, Xuezhi,Gan, Thian Yew,Chen, Yongqin David. Moisture sources and pathways associated with the spatial variability of seasonal extreme precipitation over Canada[J]. CLIMATE DYNAMICS,2018,50:629-640. |
APA | Tan, Xuezhi,Gan, Thian Yew,&Chen, Yongqin David.(2018).Moisture sources and pathways associated with the spatial variability of seasonal extreme precipitation over Canada.CLIMATE DYNAMICS,50,629-640. |
MLA | Tan, Xuezhi,et al."Moisture sources and pathways associated with the spatial variability of seasonal extreme precipitation over Canada".CLIMATE DYNAMICS 50(2018):629-640. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论