Moisture sources of extreme summer precipitation events in North Xinjiang and their relationship with atmospheric circulation
In this study, the daily observational precipitation data and NCEP reanalysis data during 1951–2014, Euler and Lagrangian method were used to investigate the moisture sources of summer extreme precipitation events in North Xinjiang. The results show that water vapor at low and upper levels of most s...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2017-03-01
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| Series: | Advances in Climate Change Research |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674927816300648 |
| _version_ | 1828925743509274624 |
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| author | Wei Huang Shi-Qiao Chang Cheng-Ling Xie Zhi-Ping Zhang |
| author_facet | Wei Huang Shi-Qiao Chang Cheng-Ling Xie Zhi-Ping Zhang |
| author_sort | Wei Huang |
| collection | DOAJ |
| description | In this study, the daily observational precipitation data and NCEP reanalysis data during 1951–2014, Euler and Lagrangian method were used to investigate the moisture sources of summer extreme precipitation events in North Xinjiang. The results show that water vapor at low and upper levels of most summer heavy rain (more than 50 mm d−1 and less than 100 mm d−1) in North Xinjiang are mainly transported by westerly circulation from the North Atlantic Ocean and the Eurasian continent. However, rainstorms of more than 100 mm d−1, which are rarely observed, are dominated by vertically integrated moisture from the North Atlantic, Arctic Oceans, and the Eurasian continent, in addition to low-level moisture from the Indian Ocean. Among these sources, the anomalous low-level moisture from the Indian Ocean, which is closely associated with stronger meridional circulation, is considered to be more important with respect to rainstorms. On the days prior to rainstorm days, stronger meridional circulation leads to an anomalous pressure gradient force, which can transport low-level moisture from the Indian Ocean along the eastern periphery of the Tibetan Plateau to North Xinjiang. Furthermore, moisture from the North Atlantic, Arctic Oceans, the Eurasian continent, and the Indian Ocean converge together to influence rainstorm development in this region. |
| first_indexed | 2024-12-13T23:20:24Z |
| format | Article |
| id | doaj.art-7752c96bcad540b298d8966722c7909e |
| institution | Directory Open Access Journal |
| issn | 1674-9278 |
| language | English |
| last_indexed | 2024-12-13T23:20:24Z |
| publishDate | 2017-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Advances in Climate Change Research |
| spelling | doaj.art-7752c96bcad540b298d8966722c7909e2022-12-21T23:27:47ZengKeAi Communications Co., Ltd.Advances in Climate Change Research1674-92782017-03-0181121710.1016/j.accre.2017.02.001Moisture sources of extreme summer precipitation events in North Xinjiang and their relationship with atmospheric circulationWei HuangShi-Qiao ChangCheng-Ling XieZhi-Ping ZhangIn this study, the daily observational precipitation data and NCEP reanalysis data during 1951–2014, Euler and Lagrangian method were used to investigate the moisture sources of summer extreme precipitation events in North Xinjiang. The results show that water vapor at low and upper levels of most summer heavy rain (more than 50 mm d−1 and less than 100 mm d−1) in North Xinjiang are mainly transported by westerly circulation from the North Atlantic Ocean and the Eurasian continent. However, rainstorms of more than 100 mm d−1, which are rarely observed, are dominated by vertically integrated moisture from the North Atlantic, Arctic Oceans, and the Eurasian continent, in addition to low-level moisture from the Indian Ocean. Among these sources, the anomalous low-level moisture from the Indian Ocean, which is closely associated with stronger meridional circulation, is considered to be more important with respect to rainstorms. On the days prior to rainstorm days, stronger meridional circulation leads to an anomalous pressure gradient force, which can transport low-level moisture from the Indian Ocean along the eastern periphery of the Tibetan Plateau to North Xinjiang. Furthermore, moisture from the North Atlantic, Arctic Oceans, the Eurasian continent, and the Indian Ocean converge together to influence rainstorm development in this region.http://www.sciencedirect.com/science/article/pii/S1674927816300648North XinjiangMoisture sourcesExtreme precipitation eventsLagrangian trajectory modelIndian Ocean |
| spellingShingle | Wei Huang Shi-Qiao Chang Cheng-Ling Xie Zhi-Ping Zhang Moisture sources of extreme summer precipitation events in North Xinjiang and their relationship with atmospheric circulation Advances in Climate Change Research North Xinjiang Moisture sources Extreme precipitation events Lagrangian trajectory model Indian Ocean |
| title | Moisture sources of extreme summer precipitation events in North Xinjiang and their relationship with atmospheric circulation |
| title_full | Moisture sources of extreme summer precipitation events in North Xinjiang and their relationship with atmospheric circulation |
| title_fullStr | Moisture sources of extreme summer precipitation events in North Xinjiang and their relationship with atmospheric circulation |
| title_full_unstemmed | Moisture sources of extreme summer precipitation events in North Xinjiang and their relationship with atmospheric circulation |
| title_short | Moisture sources of extreme summer precipitation events in North Xinjiang and their relationship with atmospheric circulation |
| title_sort | moisture sources of extreme summer precipitation events in north xinjiang and their relationship with atmospheric circulation |
| topic | North Xinjiang Moisture sources Extreme precipitation events Lagrangian trajectory model Indian Ocean |
| url | http://www.sciencedirect.com/science/article/pii/S1674927816300648 |
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