To study the long-term climate trends and the characteristics of land-atmosphere interaction in the semi-arid regions, is conducive to the understanding of drought formation mechanism. It provides scientific basis for the effective organization of the orderly human activities, alleviation the process of drought and improvement of the ecological environment in arid and semi-arid region. The surface flux is the most critical factor in the land-atmosphere interaction. In order to analysis and understand the land-atmosphere interaction in semi-arid region, this paper proposes to start from the analysis of the exchange of the surface fluxes by analyzing the practical observation data in the two typical semi-arid region of China and Northern America. The analysis result shows that the sensible heat flux is the minimum in winter,followed by summer, then spring or autumn. The sensible heat flux is generally higher in seasons with high net radiation and low soil moisture. Data collected by the monitoring stations in the north of 40°N indicates that latent heat flux is larger in seasons with much precipitation. From 1979 to 2008, the 30 years witnessed the drying out of climate in semi-arid regions in eastern and northeastern part of China. As time goes, this trend is expected to continue. According to the monitoring stations in Northern America, long-term changes of resonating heat go hand in hand with temperature changes while latent heat and precipitation are in good consistency. Interannual variability of sensible heat flux in semi-arid regions of Central America is significantly affected by temperature changes and the average soil moisture content. There is a positive correlation between the interannual change of latent heat flux and that of rainfall. Besides, latent heat flux is also influenced by temperature change.
[1]魏凤英,曹鸿兴. 华北干旱异常的地区特征[J]. 应用气象学报,1998,9(2):205-211.
[2]符淙斌,安芷生,郭维栋. 我国生存环境演变和北方干旱化趋势预测研究(Ⅱ): 研究成果的创新性及项目实施效果[J]. 地球科学进展,2005,20(11):1168-1175.
[3]Seneviratne S I, Pal J S, Eltahir E A B, et al. Summer dryness in a warmer climate: A process study with a regional climate model[J]. Climate Dynamics, 2002,20(1):69-85.
[4]Welherald R T,Manabe S.The mechanisms of summer dryness induced by greenhouse warming[J]. J Climate, 1995,8:3096-3108.
[5]曾剑,张强. 2008年夏季中国干旱-半干旱区陆面主要物理参数的平均特征[J]. 高原气象,2012,31(6):1539-1550.
[6]Reynolds J F, Stafford Smith D M, Lambin E F, et al. Global desertification: Building a science for dryland development[J]. Science, 2007, 316(5826): 847-851.
[7]马柱国,符淙斌. 中国北方干旱区地表湿润状况的趋势分析[J]. 气象学报,2001,59(6):737-746.
[8]周连童,黄荣辉. 华北地区降水、蒸发和降水蒸发差的时空变化特征[J]. 气候与环境研究,2006,11(3):280-295.
[9]赵钱飞, 郭维栋, 凌霄露,等. 半干旱区不同类型土地利用的蒸散及水分收支差异分析—以通榆为例[J]. 气候与环境研究,2013,18(4):415-426.
[10]王介民. 陆面过程实验和地气相互作用研究(从HEIFE到IMGRASS和GAME-Tibet/TIPEX[J]. 高原气象,1999,18(3):280-294.
[11]马耀明, 姚檀栋, 王介民. 青藏高原能量和水循环试验研究—GAME-Tibet与CAMP-Tibet研究进展[J]. 高原气象,2006,25(2): 344-351.
[12]涂钢,刘辉志,董文杰. 东北半干旱区退化草地土壤温度的日、季变化特征[J]. 高原气象,2008,27(4):741-748.
[13]张述文,曹帮军. 变分方法估算西北半干旱区地表热通量的适用性研究[J]. 高原气象, 2013, 32(4): 956-963, doi: 10.7522/j.issn.1000-0534. 2012.00091.
[14]符淙斌. 关于实施“干旱/半干旱地区协同观测集成研究”的建议[R/OL]. http://www.iap.cas.cn/xwzx/zhxw/200911/t20091110_ 2651541.html, 2008.
[15]符淙斌,安芷生,郭维栋. 我国生存环境演变和北方干旱化趋势预测研究(Ⅰ): 主要研究成果[J]. 地球科学进展,2005,20(11): 1157-1167.
[16]刘辉志,董文杰,符淙斌,等. 半干旱地区吉林通榆“干旱化和有序人类活动”长期观测实验[J]. 气候与环境研究,2004,9(2): 378-389.
[17]刘辉志,涂钢,董文杰,等. 半干旱地区地气界面水汽和二氧化碳通量的日变化及季节变化[J]. 大气科学,2006,30(1): 108-118.
[18]姜纪峰,延晓冬,黄耀,等. 半干旱区农田和草地与大气间二氧化碳和水热通量的模拟研究[J]. 气候与环境研究,2006,11(3): 413-424.
[19]Koppen W, Geiger R. Handbuch der Klimatologie[M]. Berlin: Gebruder Borntraeger, 1936: 1-76.
[20]米娜,于贵瑞,温学发,等. 中国通量观测网络(ChinaFLUX)通量观测空间代表性初步研究[J]. 中国科学: 地球科学,2006(增刊1): 22-33.
[21]Kalnay E, Kanamitsu M, Kistler R, et al. The NCEP/NCAR 40-Year Reanalysis Project[J]. Bull Amer Meteor Soc, 1996, 77(3): 437-471.
[22]Xie P, Arkin P A. Global precipitation: A 17-year monthly analysis based on gauge observations, satellite estimates, and numerical model outputs[J]. Bull Amer Meteor Soc, 1997, 78: 2539-2558.
[23]Brohan P, Kennedy J J, Harris I, et al. Uncertainty estimates in regional and global observed temperature changes: A new dataset from 1850[J]. J Geophys Res, 2006, 111: D12106, doi: 10.1029/2005JD006548.
[24]Jones P D, New M, Parker D E, et al. Surface air temperature and its variations over the last 150 years[J]. Rev Geophys, 1999, 37: 173-199.
[25]Rayner N A, Brohan P, Parker D E, et al. Improved analyses of changes and uncertainties in marine temperature measured in situ since the mid-nineteenth century: The HadSST2 dataset[J]. J Climate, 2006, 19: 446-469.
[26]Rayner N A, Parker D E, Horton E B, et al. Globally complete analyses of sea surface temperature, sea ice and night marine air temperature, 1871-2000[J]. J Geophys Res, 2003, 108: 4407.
[27]李杉,符淙斌. 中美半干旱区长期地表通量序列的构建及检验[J]. 气象学报, 待发表.
[28]何平. 剔除数据中异常值的若干方法[J]. 航空计测技术,1995,15:19-21.
[29]俞钟行. 拉依达准则用于剔除物探数据中的坏值[J]. 物探与化,1989,3(15):238-240.
[30]张敏,袁辉. 拉依达(Pauta)准则和异常值剔除[J]. 郑州工业大学学报,1997,18(1):84-88.
[31]马柱国,符淙斌. 20世纪下半叶全球干旱化的事实及其与大尺度背景的联系[J]. 中国科学: 地球科学,2007,37(2):222-233.
[32]赵天保, 艾丽坤, 冯锦明. NCEP再分析料和中国站点观测资料的分析比较[J]. 气候与环境研究,2004,9(2): 278-294.
[33]赵天保, 符淙斌. 中国区域ERA-40、NCEP-2再分析资料与观测资料的初步比较与分析[J]. 气候与环境研究,2006,11(1): 14-33.
[34]李杉. 中美半干旱区地表通量的变化规律及其比较研究[D]. 北京:中国科学院大气物理研究所,2012.
