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Volume 26 Issue 5

Sep.  2009

Article Contents
Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2009 >  26(5): 1027-1041

Structural Variation of Atmospheric Heat Source over the Qinghai-Xizang Plateau and its Influence on Precipitation in Northwest China the Qinghai-Xizang Plateau and Its Influence on Precipitation in Northwest China

  • 1.

    Shaanxi Provincial Climate Center, Xi'an 710015, Center for Plateau Atmospheric and Environmental Research, Department of Atmospheric Science, Chengdu University of Information Technology, Chengdu 610225,,Center for Plateau Atmospheric and Environmental Research, Department of Atmospheric Science, Chengdu University of Information Technology, Chengdu 610225, College of Atmosphere Sciences, Nanjing University of Information Science and Technology, Nanjing 210044,College of Atmosphere Sciences, Nanjing University of Information Science and Technology, Nanjing 210044


doi: 10.1007/s00376-009-7207-7

  • NCEP/NCAR reanalysis data and a 47-year precipitation dataset are utilized to analyze the relationship between an atmospheric heat source (hereafter called 1 >) over the Qinghai-Xizang Plateau (QXP) and its surrounding area and precipitation in northwest China. Our main conclusions are as follows: (1) The horizontal distribution of 1 > and its changing trend are dramatic over QXP in the summer. There are three strong centers of 1 > over the south side of QXP with obvious differences in the amount of yearly precipitation and the number of heat sinks predominate in the arid and semi-arid regions of northwest China (NWC), beside the northern QXP with an obvious higher intensity in years with less precipitation. (2) In the summer, the variation of the heat source's vertical structure is obviously different between greater and lesser precipitation years in eastern northwest China (ENWC). The narrow heat sink belt forms between the northeast QXP and the southwestern part of Lake Baikal. In July and August of greater precipitation years, the heating center of the eastern QXP stays nearly over 35oN, and at 400 hPa of the eastern QXP, the strong upward motion of the heating center constructs a closed secondary vertical circulation cell over the northeast QXP (40o--46oN), which is propitious to add precipitation over the ENWC. Otherwise, the heating center shifts to the south of 30oN and disappears in July and August of lesser precipitation years, an opposite secondary circulation cell forms over the northeast QXP, which is a disadvantage for precipitation. Meanwhile, the secondary circulation cell in years with more or less precipitation over the ENWC is also related to the heat source over the Lake Baikal. (3) The vertical structure of the heat source over the western QXP has obvious differences between greater and lesser precipitation years in western northwest China in June and July. The strong/weak heat source over the western QXP produces relatively strong/weak ascending motion and correspondingly constructs a secondary circulation cell in lesser/greater precipitation years.
  • [1] Zhao Ping, Chen Longxun, 2001: Interannual Variability of Atmospheric Heat Source/Sink over the Qinghai-Xizang (Tibetan) Plateau and its Relation to Circulation, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 106-116.  doi: 10.1007/s00376-001-0007-3
    [2] CHENG Aifang, FENG Qi, Guobin FU, ZHANG Jiankai, LI Zongxing, HU Meng, WANG Gang, 2015: Recent Changes in Precipitation Extremes in the Heihe River Basin, Northwest China, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 1391-1406.  doi: 10.1007/s00376-015-4199-3
    [3] Zhu Qiangen, Hu Jianglin, 1995: Effects on Asian Monsoon of Gigantic Qinghai-Xizang Plateau and Western Pacific Warm Pool, ADVANCES IN ATMOSPHERIC SCIENCES, 12, 351-360.  doi: 10.1007/BF02656984
    [4] XU Xingkui, ZHANG Feng, Jason K. LEVY, 2007: The Influence of Land Surface Changes on Regional Climate in Northwest China, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 527-537.  doi: 10.1007/s00376-007-0527-6
    [5] XUN Xueyi, HU Zeyong, MA Yaoming, 2012: The Dynamic Plateau Monsoon Index and Its Association with General Circulation Anomalies, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 1249-1263.  doi: 10.1007/s00376-012-1125-9
    [6] Chen Lieting, Wu Renguang, 2000: Interannual and Decadal Variations of Snow Cover over Qinghai-Xizang Plateau and Their Relationships to Summer Monsoon Rainfall in China, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 18-30.  doi: 10.1007/s00376-000-0040-7
    [7] Yizhe HAN, Dabang JIANG, Dong SI, Yaoming MA, Weiqiang MA, 2024: Time-lagged Effects of the Spring Atmospheric Heat Source over the Tibetan Plateau on Summer Precipitation in Northeast China during 1961–2020: Role of Soil Moisture, ADVANCES IN ATMOSPHERIC SCIENCES.  doi: 10.1007/s00376-023-2363-8
    [8] Zhong Qiang, Li Yinhai, 1988: SATELLITE OBSERVATION OF SURFACE ALBEDO OVER THE QINGHAI-XIZANG PLATEAU REGION, ADVANCES IN ATMOSPHERIC SCIENCES, 5, 57-66.  doi: 10.1007/BF02657347
    [9] Ding Yihui, 1992: Effects of the Qinghai-Xizang (Tibetan) Plateau on the Circulation Features over the Plateau and Its Surrounding Areas, ADVANCES IN ATMOSPHERIC SCIENCES, 9, 112-130.  doi: 10.1007/BF02656935
    [10] Zhao Ping, Chen Longxun, 2000: Calculation of Solar Albedo and Radiation Equilibrium over the Qinghai-Xizang Plateau and Analysis of Their Climatic Features, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 140-156.  doi: 10.1007/s00376-000-0050-5
    [11] ZHU Guofu, CHEN Shoujun, 2003: Analysis and Comparison of Mesoscale Convective Systems over the Qinghai-Xizang (Tibetan) Plateau, ADVANCES IN ATMOSPHERIC SCIENCES, 20, 311-322.  doi: 10.1007/BF02690789
    [12] ZHU Guofu, CHEN Shoujun, 2003: A Numerical Case Study on a Mesoscale Convective System over the Qinghai-Xizang (Tibetan) Plateau, ADVANCES IN ATMOSPHERIC SCIENCES, 20, 385-397.  doi: 10.1007/BF02690797
    [13] Wang Qianqian, Wang Anyu, Li Xuefeng, Li Shuren, 1986: THE EFFECTS OF THE QINGHAI-XIZANG PLATEAU ON THE MEAN SUMMER CIRCULATION OVER EAST ASIA, ADVANCES IN ATMOSPHERIC SCIENCES, 3, 72-85.  doi: 10.1007/BF02680046
    [14] Shan LU, Zeyong HU, Haipeng YU, Weiwei FAN, Chunwei FU, Di WU, 2021: Changes of Extreme Precipitation and its Associated Mechanisms in Northwest China, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 1665-1681.  doi: 10.1007/s00376-021-0409-3
    [15] Guoxiong WU, Bian HE, Anmin DUAN, Yimin LIU, Wei YU, 2017: Formation and Variation of the Atmospheric Heat Source over the Tibetan Plateau and Its Climate Effects, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 1169-1184.  doi: 10.1007/s00376-017-7014-5
    [16] Yongjing MA, Jinyuan XIN, Yining MA, Lingbin KONG, Kequan ZHANG, Wenyu ZHANG, Yuesi WANG, Xiuqin WANG, Yongfeng ZHU, 2017: Optical Properties and Source Analysis of Aerosols over a Desert Area in Dunhuang, Northwest China, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 1017-1026.  doi: 10.1007/s00376-016-6224-6
    [17] ZHOU Lian-Tong, HUANG Ronghui, 2010: An Assessment of the Quality of Surface Sensible Heat Flux Derived from Reanalysis Data through Comparison with Station Observations in Northwest China, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 500-512.  doi: 10.1007/s00376-009-9081-8
    [18] Chuandong ZHU, Rongcai REN, Guoxiong WU, 2018: Varying Rossby Wave Trains from the Developing to Decaying Period of the Upper Atmospheric Heat Source over the Tibetan Plateau in Boreal Summer, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 1114-1128.  doi: 10.1007/s00376-017-7231-y
    [19] ZHANG Cunjie, C. P.-A. BOURQUE, SUN Landong, Q. K. HASSAN, 2010: Spatiotemporal Modeling of Monthly Precipitation in the Upper Shiyang River Watershed in West Central Gansu, Northwest China, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 185-194.  doi: 10.1007/s00376-009-8089-4
    [20] YUAN Weihua, YU Rucong, LI Jian, 2013: Changes in the Diurnal Cycles of Precipitation over Eastern China in the Past 40 Years, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 461-467.  doi: 10.1007/s00376-012-2092-x
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    • Manuscript History

    Manuscript received: 10 September 2009
    Manuscript revised: 10 September 2009
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Structural Variation of Atmospheric Heat Source over the Qinghai-Xizang Plateau and its Influence on Precipitation in Northwest China the Qinghai-Xizang Plateau and Its Influence on Precipitation in Northwest China

    • 1. Shaanxi Provincial Climate Center, Xi'an 710015, Center for Plateau Atmospheric and Environmental Research, Department of Atmospheric Science, Chengdu University of Information Technology, Chengdu 610225,,Center for Plateau Atmospheric and Environmental Research, Department of Atmospheric Science, Chengdu University of Information Technology, Chengdu 610225, College of Atmosphere Sciences, Nanjing University of Information Science and Technology, Nanjing 210044,College of Atmosphere Sciences, Nanjing University of Information Science and Technology, Nanjing 210044
    • Manuscript received: 2009-09-10
    • Manuscript revised: 2009-09-10

    Abstract: NCEP/NCAR reanalysis data and a 47-year precipitation dataset are utilized to analyze the relationship between an atmospheric heat source (hereafter called 1 >) over the Qinghai-Xizang Plateau (QXP) and its surrounding area and precipitation in northwest China. Our main conclusions are as follows: (1) The horizontal distribution of 1 > and its changing trend are dramatic over QXP in the summer. There are three strong centers of 1 > over the south side of QXP with obvious differences in the amount of yearly precipitation and the number of heat sinks predominate in the arid and semi-arid regions of northwest China (NWC), beside the northern QXP with an obvious higher intensity in years with less precipitation. (2) In the summer, the variation of the heat source's vertical structure is obviously different between greater and lesser precipitation years in eastern northwest China (ENWC). The narrow heat sink belt forms between the northeast QXP and the southwestern part of Lake Baikal. In July and August of greater precipitation years, the heating center of the eastern QXP stays nearly over 35oN, and at 400 hPa of the eastern QXP, the strong upward motion of the heating center constructs a closed secondary vertical circulation cell over the northeast QXP (40o--46oN), which is propitious to add precipitation over the ENWC. Otherwise, the heating center shifts to the south of 30oN and disappears in July and August of lesser precipitation years, an opposite secondary circulation cell forms over the northeast QXP, which is a disadvantage for precipitation. Meanwhile, the secondary circulation cell in years with more or less precipitation over the ENWC is also related to the heat source over the Lake Baikal. (3) The vertical structure of the heat source over the western QXP has obvious differences between greater and lesser precipitation years in western northwest China in June and July. The strong/weak heat source over the western QXP produces relatively strong/weak ascending motion and correspondingly constructs a secondary circulation cell in lesser/greater precipitation years.

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