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Volume 3 Issue 4

Oct.  1986

Article Contents

A SIMPLIFIED MODEL STUDY ON THE SHORT-TERM CLIMATIC EFFECT OF SNOWFALL ANOMALY IN MID-HIGH LATITUDES


doi: 10.1007/BF02657934

  • A simulation of the annual variation of temperature and moisture in the atmosphere and sublayer of soil in mid-high latitudes has been performed with a one-dimensional atmosphere-land coupled model, in which snowmelt process is included. The computed temperature variations in each latitudinal belt are con-sistent with the seasonal change of snowextent over continents in the Northern Hemisphere.To analyse the short-term climatic effect of snowfall anomaly, two sets of experiments have carried out by using the above simplified model, i. e. 1) the snowmelt period is earlier than the climatic mean and 2) snowdepth is less than the climatic mean. The results are shown in the present paper. In the first ex-periment, snow melts earlier, and comparing with the normal annual variation, the absorption of solar radia-tion increases significantly due to the earlier decrease of albedo. Thus the surface temperature is higher, and latent and sensible heat fluxes are enhanced. This process is characterized by thermal anomaly. In less snow-depth experiment, the soil is drier after snowmelting, and thus evaporation and precipitation are reduced. The hydrological anomaly constitutes its main character which will continue till August. In summary, the snowfall anomaly is an important factor in the formation of dry-warm or cold-wet climate in spring and summer.
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    [2] Jianping LI, Fei ZHENG, Cheng SUN, Juan FENG, Jing WANG, 2019: Pathways of Influence of the Northern Hemisphere Mid-high Latitudes on East Asian Climate: A Review, ADVANCES IN ATMOSPHERIC SCIENCES, 36, 902-921.  doi: 10.1007/s00376-019-8236-5
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    [4] Ni Yunqi, Lin Wuyin, Wang Wanqiu, Yuan Chongguang, Zhang Qin, 1993: Numerical Study for Potential Predictability of Short-Term Anomalous Climate Change Caused by El Nino, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 1-10.  doi: 10.1007/BF02656949
    [5] CAO Jian, Bin WANG, Baoqiang XIANG, Juan LI, WU Tianjie, Xiouhua FU, WU Liguang, MIN Jinzhong, 2015: Major Modes of Short-Term Climate Variability in the Newly Developed NUIST Earth System Model (NESM), ADVANCES IN ATMOSPHERIC SCIENCES, 32, 585-600.  doi: 10.1007/s00376-014-4200-6
    [6] JIN Long, JIN Jian, YAO Cai, 2005: A Short-Term Climate Prediction Model Based on a Modular Fuzzy Neural Network, ADVANCES IN ATMOSPHERIC SCIENCES, 22, 428-435.  doi: 10.1007/BF02918756
    [7] LIU Xiying, ZHANG Xuehong, YU Yongqiang, YU Rucong, 2004: Mean Climatic Characteristics in High Northern Latitudes in an Ocean-Sea Ice-Atmosphere Coupled Model, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 236-244.  doi: 10.1007/BF02915710
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    [9] Fei WANG, Hua ZHANG, Qi CHEN, Min ZHAO, Ting YOU, 2020: Analysis of Short-term Cloud Feedback in East Asia Using Cloud Radiative Kernels, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 1007-1018.  doi: 10.1007/s00376-020-9281-9
    [10] HAN Leqiong, LI Shuanglin, LIU Na, 2014: An Approach for Improving Short-Term Prediction of Summer Rainfall over North China by Decomposing Interannual and Decadal Variability, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 435-448.  doi: 10.1007/s00376-013-3016-0
    [11] Wang Huijun, Zhou Guangqing, Lin Zhaohui, Zhao Yan, Guo Yufu, Ma Zhuguo, 2001: Recent Researches on the Short-Term Climate Prediction at IAP-A Brief Review, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 929-936.
    [12] Li Maicun, Yao Dirong, 1985: SOME RESULTS OF APPLICATIONS OF STATISTICAL METHOD TO CLIMATE CHANGES AND SHORT-TERM CLIMATE PREDICTION IN CHINA, ADVANCES IN ATMOSPHERIC SCIENCES, 2, 271-281.  doi: 10.1007/BF02677243
    [13] Zhang Fuqing, Lin Zhenshan, Jiang Quanrong, 1994: The Fractal Dimension Distribution of the Short-Term Climate System in China and It’s Connection with the Monsoon Climate, ADVANCES IN ATMOSPHERIC SCIENCES, 11, 459-462.  doi: 10.1007/BF02658166
    [14] Xiuping YAO, Qin ZHANG, Xiao ZHANG, 2020: Potential Vorticity Diagnostic Analysis on the Impact of the Easterlies Vortex on the Short-term Movement of the Subtropical Anticyclone over the Western Pacific in the Mei-yu Period, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 1019-1031.  doi: 10.1007/s00376-020-9271-y
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    [17] Rong KONG, Ming XUE, Edward R. MANSELL, Chengsi LIU, Alexandre O. FIERRO, 2024: Assimilation of GOES-R Geostationary Lightning Mapper Flash Extent Density Data in GSI 3DVar, EnKF, and Hybrid En3DVar for the Analysis and Short-Term Forecast of a Supercell Storm Case, ADVANCES IN ATMOSPHERIC SCIENCES, 41, 263-277.  doi: 10.1007/s00376-023-2340-2
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Manuscript History

Manuscript received: 10 October 1986
Manuscript revised: 10 October 1986
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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A SIMPLIFIED MODEL STUDY ON THE SHORT-TERM CLIMATIC EFFECT OF SNOWFALL ANOMALY IN MID-HIGH LATITUDES

  • 1. Institute of Atmospheric Physics, Academia Sinica, Beijing

Abstract: A simulation of the annual variation of temperature and moisture in the atmosphere and sublayer of soil in mid-high latitudes has been performed with a one-dimensional atmosphere-land coupled model, in which snowmelt process is included. The computed temperature variations in each latitudinal belt are con-sistent with the seasonal change of snowextent over continents in the Northern Hemisphere.To analyse the short-term climatic effect of snowfall anomaly, two sets of experiments have carried out by using the above simplified model, i. e. 1) the snowmelt period is earlier than the climatic mean and 2) snowdepth is less than the climatic mean. The results are shown in the present paper. In the first ex-periment, snow melts earlier, and comparing with the normal annual variation, the absorption of solar radia-tion increases significantly due to the earlier decrease of albedo. Thus the surface temperature is higher, and latent and sensible heat fluxes are enhanced. This process is characterized by thermal anomaly. In less snow-depth experiment, the soil is drier after snowmelting, and thus evaporation and precipitation are reduced. The hydrological anomaly constitutes its main character which will continue till August. In summary, the snowfall anomaly is an important factor in the formation of dry-warm or cold-wet climate in spring and summer.

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