Radiant Heat Transportation at the Interface of Desert——Taking Gurbantunggut desert for example
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摘要: 根据古尔班通古特沙漠的自然与气候条件，对不同下垫面区域的太阳短波辐射量和地表与大气的长波辐射热量以及沙层热通量收支状况进行了测量分析。结果表明，流动沙漠层和固定沙漠层的热量传输差异主要是由地表状况、抄层性质和气温等因素决定的。流动沙漠区反射率和长波辐射大于固定沙漠区。沙漠层热通量随着沙层深度的增加而增大，而热量传输则随其深度的增加而减小，不同类型沙漠区地一气之间的热量传输过程，白天以感热、夜间以潜热的形式向大气传输，形成了沙漠地区对辐射热量特有的响应与反馈交换传输过程。同时，依据实测资料和地球表面热量平衡方程讨论了沙漠区域物理气候参数的变化特征，并进行了地-气界面热量过程耦合作用的模拟分析。Abstract: The radiant heat transportation at desert interface includes solar radiant heat flux,long wave radiant heat flux and desert surface heat flux. Based on the natural and climatic conditions of Gurbantunggut Desert,the author has measured and analyzed the heat budget on different underlying areas .The following results are mainly obtained: (1) The heat transportation on sand-shifting desert and on sand-fixed desert is different limited by individual surface feature,sand layer nature and air temperature etc. (2)The reflectivity and the long wave radiation on sand-shifting area are all larger than that on sand-fixed area. (3)The heat flux through sand layer increases with the layer going down;while heat transportation value changes with an inverse trend. (4)The heat transportation from earth to atmosphere on different desert types are in forms of sensible heat at daytime and latent heat at night which constitutes special response and feedback transfer process to solar radiant heat on desert area. In the meantime,the author has analyzed the changing properties of physical climate parameters in desert region according to measured data and heat balance equation of earth surface;and modeled the heat transfer process at earth-atmosphere interface.
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Key words:
- earth-atmosphere interface /
- heat flux /
- Gurbantunggut Desert
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[1] 1 Charney J G. Dynamics of deserts and drought in the Sahel[J].Quart. J. Roy. Meteor: Soc,1975,101:193-202
2 Smith E A. Transition of surfaces enengy budget in Gobi desert between spring and summer season. [J] J. Climate Appl. Met，1986.25:1725-1740
3 Henry N, Le Houerou. Climate Change,drought and desertification[J]. J Arid Environments,1996,34:133-185
4 季国良，邹基玲.干旱地区绿洲和沙漠辐射收支的季节变化[J].高原气象，1992,13(3):323-329.
5 魏文寿.沙漠表层粒度与水热变化的环境效应分析[J].沉积学报，1998,16(1):152-155
6 王可丽，钟强.辐射传输模式中地表参数对大气长波辐射的影响[J].大气科学，1995,19(5):606-613
7 魏文寿，董光荣.古尔班通古特沙漠的辐射热量交换分析[J].中国沙漠,1997, 17(4):335-341
8 Cunnington M, Rowntree P R. Simulation of the Saharan atmosphere-dependence on moisture and albedo[J]. Quan J Roy Meteo Soc,1986, 112:971-999
9 Kimyra F,Shimzu Y. Estunation of sensible and latent heat fluxes from soil surface temperatune using a linear air-land heat transfermodel[J]. J. App. Met.,1994,33(4):344-356
10 Norman J R. Microclimate:The biological environment[M]. John Wiley and Sons .Second Edition,1983. 1-8
11 何宗颖，申建友，李胜功.奈曼地区流动沙丘的地中热状况，科尔沁沙地生态环境综合整治研究[M].兰州:甘肃科学技术出版社，1993. 141-147
12 马庆芳，方荣生，项立成等.实用热物理手册[M].北京:中国农业机械出版社，1986. 955
13 董光荣，申建友，金炯.试论全球气候变化与沙漠的关系[J].第四纪研究，1990,1:91-98
14 Monteith J L. Principles of environmental physics [M]. Edward Arnold .London,1973. 238-245
15 Mabbutt J A. Desertification indicators [J]. Climate Change，1986,9:113-122
16 Thom A S. Momentum,massed heat exchange of vegetation[J].Quart .J. Roy. Meteor .Soc .1972,98:124-134
17 郭学良，王介民.利用简化动力学近似分析黑河实验区的感热通量[J].高原气象，1993,12(2):133-140
18 张强.西部干旱环境同绿洲的相互作用及其与大气环流的关系，中国西部区域气候变化及其相关问题的研究[M].兰州:兰州大学出版社，1995. 50-55 -
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