Compar ison Analysis of Environmental Changes Between Sahel and Agro- pastor al Zone in Nor thern China
Received date: 2007-04-01
Revised date: 2007-06-01
Online published: 2007-07-25
Sahel is similar to agro~pastoral zone in Northern China in some aspects concerning environmental characteristics and environmental change, and there are some obvious linkages between them. The comparison analysis between them in precipitation, vegetation, drought events and dust storms can help better understand the variability of environment and climate in semiarid/arid regions in China and Sahel. Their interdecadal changes of precipitation have the similar trends. For Sahel, the interannual variability in precipitation is dominant before 1950s, while the interdecadal changes are outstanding from the mid of 1960s. A large portion of Sahel shows an increasing trend in NDVI. The interdecadal change of precipitation may be an important factor for the occurrence of drought, and temperature may also play roles in the formation of drought. The dust storm frequency has some evident relationship with precipitation on the interannual and interdecadal timescales, and the annual mean temperature and synoptic variability also have some influence on it. In agro- pastoral zone in Northern China, the interannual change is an outstanding characteristic in annual precipitation. In the north and east part of the zone vegetation experiences the increasing trend, and the south part shows a decreasing trend. The interdacadal change of precipitation played a role in the forming of drought events, but the same amount precipitation reduction may cause different drought in intensity. The spring dust storm frequency has tight relationship with previous winter temperature and synoptic variability, and also has some link with spring precipitation.
MAO Rui,GONG Daoyi,FANG Qiaomin . Compar ison Analysis of Environmental Changes Between Sahel and Agro- pastor al Zone in Nor thern China[J]. PROGRESS IN GEOGRAPHY, 2007 , 26(4) : 51 -63 . DOI: 10.11820/dlkxjz.2007.04.008
[1] Ye Duzheng, Chen Panqin. The primary study of global change of China. Beijing: Meteorology Press, 1992.
[2] Zhang Lansheng, Fang Xiuqi, Ren Guoyu, et al. Environmental changes in the north China framing~grazing transitional zone. Earth Science Frontiers (China University of Geosciences, Beijing), 1997, 4(1~2): 127~136.
[3] Yan Zhongwei, Ji Jinjun. Climatic jump over the northern hemisphere in 1960s I: Summer precipitation and temperature. Sciences in China (B), 1990, 97~103.
[4] Yan Zhongwei, Ji Jinjun, Ye Duzheng. Climatic jump over the northern hemisphere in 1960s II: Sea level pressure and height at 500 hPa level. Sciences in China (B), 1990, 8, 879~885.
[5] Song Yan, Ji Jinjun. The interdecadal abrupt change of the African~Asian summer monsoon in the 1960s. Chinese Journal of Atmospheric Sciences, 2001, 25(2): 200~208.
[6] Shi Peijun, Ha Si. Comparision between Holocene environmental changes in north China agro~pastoral zone and Africa Sahelian belt. Earth Science Frontiers (China University of Geosciences, Beijing), 2002, 9(1): 121~128.
[7] Ren B H, Lu R Y, Xiao Z N. A possible linkage in the interdecadal variability of rainfall over North China and the Sahel. Advances in Atmospheric Science, 2004, 21(5): 699~707.
[8] Huang Gang. Global climate change phenomenon associated with the droughts in North China. Climatic and Environmental Research, 2006, 11(3): 270~279.
[9] Folland C K, Palmer T N, Parker D E. Sahel rainfall variability and worldwide sea temperature, 1901~85. Nature, 1986, 320: 602~ 606.
[10] Taylor C M, Lambin E F, Stephane N, et al. The influence of land use change on climate in the Sahel. Journal of Climate, 2003, 24(15): 3615~3629.
[11] Wang Jing’ai, Xu Xia, Liu Peifang. Land use and land carrying capacity in ecotone between agriculture and husbandry in Northern China. Resources Science, 1999, 21(5): 19~24.
[12] Shi Peijun, Gong Daoyi. Variability of summer rainfall over northern China and its association with thermal conditions of early stage underlying surface. Journal of Natural Resources, 2001, 16(3): 21~215.
[13] Wang Shaowu, Gong Daoyi, Ye Jinlin, et al. Seasonal precipitation series of Eastern China since 1880 and the variability. Acta Geographica Sinica, 2000, 55(3): 281~293.
[14] Hulme M. Recent climatic change in the world' s dry lands. Geophysical Research Letters, 1996, 23: 61~64.
[15] Janowiak J E. An investigation of inter- annual rainfall variability in Africa. Journal of Climate, 1988, 1: 240~255.
[16] Nicholson S E. An overview of African rainfall fluctuations of the last decade. Journal of Climate, 1996, 9: 1463~1466.
[17] Nicholson S E, Palao I M. A re- evaluation of rainfall variability in the Sahel Part I: Characteristics of rainfall fluctuations. International Journal of Climatology, 1993, 13: 371~389.
[18] Hulme M, Doherty R, Ngara T, et al. African climate change: 1900~2100. Climate Research, 2001, 17: 145~168.
[19] Nicholson S E. Long- term changes in African rainfall. Weather, 1989, 44: 46~56.
[20] Hulme M. Climatic perspectives on Sahelian desiccation: 1973~1998. Global Environmental Change, 2001, 11: 19~29.
[21] Dai A G, Wigley T M L. Global patterns of ENSO- induced precipitation. Geophysical Research Letters, 2000,27:1283~ 1286.
[22] Ward M N. Diagnosis and short - lead time prediction of summer rainfall in tropical North Africa at internal and multidecadal timescales. Journal of Climate, 1998, 11: 3167~3191.
[23] Dai A G, Lamb P J, Trenberth K E, et al. The recent Sahel drought is real. International Journal of Climatology, 2004a, 24: 1323~1331.
[24] Yan Zhongwei, Nicole P M. On the relationship between global thermal variations and the wet/dry alterations in the Asian and African monsoon areas. Acta Geographica Sinica, 1995, 50(5): 471~479.
[25] Yan Zhongwei, Li Zhaoyuan, Wang Xiaochun. An Analysis of Decade to Century scale Climatic Jumps in History. Chinese Journal of Atmospheric Sciences, 1993, 17(6): 663~671.
[26] Herrmann S M, Anyamba A, Tucker C J. Recent trends in vegetation dynamics in the African Sahel and their relationship to climate. Global Environmental Change, 2005, 15: 394~404.
[27] Tucker C J, Pinzon J E, Brown M E, et al. An extended AVHRR 8~km NDVI data set compatible with MODIS and SPOT vegetation NDVI data. International Journal of Remote Sensing, 2005, 26(20): 4485~4498.
[28] Olsson L, Eklundh L, Ardoe J. A recent greening of the Sahel trends, patterns and potential causes. Journal of Arid Environments, 2005, 63: 556~566.
[29] Fang J Y, Piao S L, He J S, et al. Increasing terrestrial vegetation activity in China, 1982~1999. Science in China(C), 2004, 47(3): 229~240.
[30] Gong D Y, Shi P J. Inter~annual changes in Eurasian continent NDVI and its sensitivity to the large~scale climate variations in the last 20 years. Acta Botanica Sinica, 2004, 46 (2): 186~193.
[31] Dai A G, Trenberth K E, Qian T T. A global data set of Palmer Drought Severity Index for 1870~2002: Relationship with soil moisture and effects of surface warming. Hydrometeorology, 2004, 5:1117~1130.
[32] Goudie A S, Middleton N J. The changing frequency of dust Storms through time. Climatic Change, 1992, 20: 197~225.
[33] N’tchayi G M, Bertrand J J, Nicholson S E. The Diurnal and Seasonal Cycles of Wind~Borne Dust over Africa North of the Equator. Journal of Applied Meteorology, 1997, 36: 868~882.
[34] Ben Mohamed A. Wind Erosion in Niger: Extent, Current Research and Ongoing Soil Conservation Activities. In: Sivakumar M V et al, eds. Wind Erosion in Africa and West Asia: Problems and Control Strategies. Aleppo: ICARDA, 1998. 125~133.
[35] Hulme M. Recent climatic change in the world' s drylands. Geophysical Research Letters, 1996, 23: 61~64.
[36] Quan Linsheng, Shi Shaoying, Zhu Yafen, et al. Temporal~spatial distribution characteristics and causes of dust~day in China. Acta Geographica Sinica, 2001, 56(4): 477~485.
[37] Qian W H, Quan L S, Shi S Y. Variations of the dust storm in China and its climatic control. Journal of Climate, 2002, 15: 1216~1229.
[38] Mao Rui, Gong Daoyi, Fan Yida. Influences of synoptic variability on spring sand storm frequency in North China. Acta Geographica Sinica, 2005,60(1):12~20.
/
| 〈 |
|
〉 |