Water Vapor Transportation and Its Influences on Precipitation in Summer over Qinghai-Xizang Plateau and Its Surroundings

LIN Houbo; YOU Qinglong; JIAO Yang; MIN Jinzhong

doi:10.7522/j.issn.1000-0534.2014.00146

2016 , Vol. 35 >Issue 2: 309 - 317

DOI: https://doi.org/10.7522/j.issn.1000-0534.2014.00146

Water Vapor Transportation and Its Influences on Precipitation in Summer over Qinghai-Xizang Plateau and Its Surroundings

LIN Houbo ,
YOU Qinglong ,
JIAO Yang ,
MIN Jinzhong

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Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China;2. Institute of Climate Change and Evaluation between China and UK, Nanjing University of Information Science and Technology, Nanjing 210044, China;3. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China

Received date: 2014-07-01

Online published: 2016-04-28

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Abstract

Based on the European Centre for Medium-Range Weather Forecasts (ECMWF) Interim Reanalysis (ERA-Interim hereafter) from 1979 to 2010, the average water vapor transport flux distribution in summer over the Qinghai-Xizang Plateau (QXP hereafter) is calculated and studied. Combined with the high resolution observational data of the daily precipitation over the QXP, four moisture paths influencing the precipitation over the QXP are found, which are defined as the paths of westerly, Arabian Sea, the northern side of Bay of Bengal and South China Sea, respectively. Moreover, the area and function of these paths influencing precipitation process over the QXP have been analyzed and addressed. The results show that the years of both strong (1979, 1984, 1996, 1998, 2002, 2004, 2007) and weak (1994, 2001, 2006) precipitation over the QXP are consistent with the results reflected from path of the northern side of Bay of Bengal. Compared with the rest paths, the influence of the westerly path is weakest, which only has an role in the northwest QXP from Shiquanhe to the south of Tarim Basin; The northern side of Bay of Bengal path has an effect in the central-southeastern QXP;the path of the South China Sea dominates the southeastern and central-south of QXP such as Naqu, Linzhi, Changdu, Yushu and other regions; Arabian Sea path has negative correlations with the rest three paths, especially with the northern side of Bay of Bengal path (R=-0.65, P<0.05). Furthermore, Arabian Sea path indirectly modulates the central-southwestern QXP by adjusting the intensity of both the northern side of Bay of Bengal path and South China Sea path. These results suggest that both the water vapor transport path and pattern of precipitation over the QXP is coherently connected.

Key words： The Qinghai-Xizang P; Water vapor transpor; Precipitation

Cite this article

LIN Houbo , YOU Qinglong , JIAO Yang , MIN Jinzhong . Water Vapor Transportation and Its Influences on Precipitation in Summer over Qinghai-Xizang Plateau and Its Surroundings[J]. Plateau Meteorology, 2016 , 35(2) : 309 -317 . DOI: 10.7522/j.issn.1000-0534.2014.00146

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