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Volume 2 Issue 4

Oct.  1985

Article Contents

THE ATMOSPHERIC HEAT BUDGET OVER THE WESTERN PART OF THE TIBETAN PLATEAU DURING MONEX, 1979


doi: 10.1007/BF02678744

  • The atmospheric heat source strength over western Tibet has been computed for the period beginning with the last ten days in May, 1979 and extending through August, 1979. Our results show a significantly smaller heat source than that obtained by other authors. The discrepancy is mainly due to adjustments in the dray, coefficient suggested by observations and numerical modeling experiments. We subdivided western Tibet into northern and southern parts. In the north sensible heating, SH, provides the dominant input into the atmospheric heat source, whereas in the southern part latent heat, LP, offers a significant contribution after the start of the rainy season.Detailed heat budget calculations were also carried out over limited regions of southwestern Tibet which hau good station coverage. During periods with area-averaged rainfall ≤1 mm/day an atmospheric heat source maximum was located over southwestern Tibet near the 500 hPa level, while a heat sink dominated the upper troposphere in a layer of subsidence. When rainfall exceeded 4 mm/day, ascending motions and heal sources prevailed throughout the troposphere with maxima near 400 hPa. Time series analyses of the heat sourcs components show that the total atmospheric heat source is strongly modulated by the release of latent heat. Atmospheric radiational cooling reveals a phase shift in its relation with precipitation. During the first part of the observation period a correlation of that cooling exists mainly with the net radiation at the top of the atmosphere, during the last part with the net radiation at the ground.
  • [1] JIAN Maoqiu, QIAO Yunting, YUAN Zhuojian, LUO Huibang, 2006: The Impact of Atmospheric Heat Sources over the Eastern Tibetan Plateau and the Tropical Western Pacific on the Summer Rainfall over the Yangtze-River Basin, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 149-155.  doi: 10.1007/s00376-006-0015-4
    [2] P. N. Mahajan, V. R. Mujumdar, S. P. Ghanekar, 1986: THE BURST OF INDIAN SUMMER MONSOON AS REVEALED BY GOES SATELLITE DURING MONEX 1979, ADVANCES IN ATMOSPHERIC SCIENCES, 3, 514-519.  doi: 10.1007/BF02657941
    [3] 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
    [4] Chen Longxun, Li Weiliang, 1985: THE ATMOSPHERIC HEAT BUDGET IN SUMMER OVER ASIA MONSOON AREA, ADVANCES IN ATMOSPHERIC SCIENCES, 2, 487-497.  doi: 10.1007/BF02678747
    [5] 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
    [6] 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
    [7] 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
    [8] Ding Yihui, Fu Xiuqin, Zhang Baoyan, 1984: STUDY OF THE STRUCTURE OF A MONSOON DEPRESSION OVER THE BAY OF BENGAL DURING SUMMER MONEX, ADVANCES IN ATMOSPHERIC SCIENCES, 1, 62-83.  doi: 10.1007/BF03187617
    [9] ZHU Weijun, Yongsheng ZHANG, 2009: Summertime Atmospheric Teleconnection Pattern Associated with a Warming over the Eastern Tibetan Plateau, ADVANCES IN ATMOSPHERIC SCIENCES, 26, 413-422.  doi: 10.1007/s00376-009-0413-5
    [10] Wu Aiming, Ni Yunqi, 1997: The Influence of Tibetan Plateau on the Interannual Variability of Atmospheric Circulation over Tropical Pacific, ADVANCES IN ATMOSPHERIC SCIENCES, 14, 69-80.  doi: 10.1007/s00376-997-0045-6
    [11] YANG Kun, Toshio KOIKE, 2008: Satellite Monitoring of the Surface Water and Energy Budget in the Central Tibetan Plateau, ADVANCES IN ATMOSPHERIC SCIENCES, 25, 974-985.  doi: 10.1007/s00376-008-0974-8
    [12] Lihua ZHU, Gang HUANG, Guangzhou FAN, Xia QU, Guijie ZHAO, Wei HUA, 2017: Evolution of Surface Sensible Heat over the Tibetan Plateau Under the Recent Global Warming Hiatus, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 1249-1262.  doi: 10.1007/s00376-017- 6298-9
    [13] Fangchi LIU, Xiaojing JIA, Wei DONG, 2024: Changes in Spring Snow Cover over the Eastern and Western Tibetan Plateau and Their Associated Mechanism, ADVANCES IN ATMOSPHERIC SCIENCES, 41, 959-973.  doi: 10.1007/s00376-023-3111-9
    [14] Ding Yihui, T. Iwashima, T. Murakami, 1985: TEMPERATURE CHANGES OVER EURASIA DURING THE LATE SUMMER OF 1979, ADVANCES IN ATMOSPHERIC SCIENCES, 2, 200-214.  doi: 10.1007/BF03179752
    [15] Nan GE, Lei ZHONG, Yaoming MA, Yunfei FU, Mijun ZOU, Meilin CHENG, Xian WANG, Ziyu HUANG, 2021: Estimations of Land Surface Characteristic Parameters and Turbulent Heat Fluxes over the Tibetan Plateau Based on FY-4A/AGRI Data, ADVANCES IN ATMOSPHERIC SCIENCES.  doi: 10.1007/s00376-020-0169-5
    [16] Yang ZHAO, Xiangde XU, Bin CHEN, Yinjun Wang, 2016: The Upstream "Strong Signals" of the Water Vapor Transport over the Tibetan Plateau during a Heavy Rainfall Event in the Yangtze River Basin, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 1343-1350.  doi: 10.1007/s00376-016-6118-7
    [17] Duming GAO, Jiangyu MAO, Guoxiong WU, Yimin LIU, 2024: Circulation Background and Genesis Mechanism of a Cold Vortex over the Tibetan Plateau during Late April 2018, ADVANCES IN ATMOSPHERIC SCIENCES, 41, 1201-1216.  doi: 10.1007/s00376-023-3124-4
    [18] CAO Ning, REN Baohua, ZHENG Jianqiu, 2015: Evaluation of CMIP5 Climate Models in Simulating 1979-2005 Oceanic Latent Heat Flux over the Pacific, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 1603-1616.  doi: 10.1007/s00376-015-5016-8
    [19] Zhijie KANG, Bo QIU, Zheng XIANG, Ye LIU, Zhiqiang LIN, Weidong GUO, 2022: Improving Simulations of Vegetation Dynamics over the Tibetan Plateau: Role of Atmospheric Forcing Data and Spatial Resolution, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 1115-1132.  doi: 10.1007/s00376-022-1426-6
    [20] Anmin DUAN, Ruizao SUN, Jinhai HE, 2017: Impact of Surface Sensible Heating over the Tibetan Plateau on the Western Pacific Subtropical High: A Land-Air-Sea Interaction Perspective, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 157-168.  doi: 10.1007/s00376-016-6008-z

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Manuscript History

Manuscript received: 10 October 1985
Manuscript revised: 10 October 1985
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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THE ATMOSPHERIC HEAT BUDGET OVER THE WESTERN PART OF THE TIBETAN PLATEAU DURING MONEX, 1979

  • 1. ZhongshanUniversity,Guangzhou,DepartmentofAtmosphericScienceColoradoStateUniversityFortCollinsColoradoU.S.A.,InstituteofAtmosphericphysics,AcademiaSinica,Beijing

Abstract: The atmospheric heat source strength over western Tibet has been computed for the period beginning with the last ten days in May, 1979 and extending through August, 1979. Our results show a significantly smaller heat source than that obtained by other authors. The discrepancy is mainly due to adjustments in the dray, coefficient suggested by observations and numerical modeling experiments. We subdivided western Tibet into northern and southern parts. In the north sensible heating, SH, provides the dominant input into the atmospheric heat source, whereas in the southern part latent heat, LP, offers a significant contribution after the start of the rainy season.Detailed heat budget calculations were also carried out over limited regions of southwestern Tibet which hau good station coverage. During periods with area-averaged rainfall ≤1 mm/day an atmospheric heat source maximum was located over southwestern Tibet near the 500 hPa level, while a heat sink dominated the upper troposphere in a layer of subsidence. When rainfall exceeded 4 mm/day, ascending motions and heal sources prevailed throughout the troposphere with maxima near 400 hPa. Time series analyses of the heat sourcs components show that the total atmospheric heat source is strongly modulated by the release of latent heat. Atmospheric radiational cooling reveals a phase shift in its relation with precipitation. During the first part of the observation period a correlation of that cooling exists mainly with the net radiation at the top of the atmosphere, during the last part with the net radiation at the ground.

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