| 沙漠与沙漠化 |
|
|
|
|
| Remote Sensing Analysis on Aeolian Desertification Trends in Northern China during 1975—2010 |
| WANG Tao, SONG Xiang, YAN Chang-zhen, LI Sen, XIE Jia-li |
| Key Laboratory of Desert and Desertification of Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
|
|
|
|
Abstract The data of aeolian desertification lands status in different periods have been extracted through visual interpretation method based on Landsat MSS, TM/ETM images in 1975, 1990, 2000, 2005 and 2010 over the northern China areas. Hence, we analyzed the changing trend of aeolian desertification in northern China during the last 35 years, and have got some results as follows: (1) The area of aeolian desertification lands in northern China in 2010 are 37.59×104 km2, among which the slight grade accounts for 33.80%, the moderate grade for 22.84%, the severe grade for 22.16%, and the extremely severe grade for 21.21%. (2) From 1975 to 1990, the net increase area of land desertification area of northern China was 33 838.32 km2 with an increasing rate of 2 255.89 km2·a-1; the net area of land desertification lands being intensified was 33 279.28 km2; thus the net developing rate was 4 474.51 km2·a-1. From 1990 to 2000, the net increasing rate of land desertification area was 3 441.49 km2·a-1 and net developing rate was 5 370.06 km2·a-1. Since 2000, there was a recovering trend of land desertification lands in northern China. From 2000 to 2005, the net area decreasing rate was 1 635.28 km2·a-1, and the net reversion rate was 10 071.02 km2·a-1. From 2005 to 2010, the net area decreasing rate was 1 114.35 km2·a-1, and the net reversion rate was 7 552.21 km2·a-1. Changes of land desertification mainly occurred in the agro-pasture ecotone of semi-arid area.
|
|
Received: 06 June 2011
Published: 20 November 2011
|
|
|
[1]高尚武,王葆芳,朱灵益,等.中国沙质荒漠化土地监测评价指标体系[J].林业科学,1998,34(2):1-10.
[2]王涛.沙漠化研究进展[J].中国科学院院刊,2009(3):290-296.
[3]王涛,朱震达.中国北方沙漠化的若干问题[J].第四纪研究,2001,21(1):56-65.
[4]张凯,高会旺,张仁健,等.我国沙尘的来源、移动路径及对东部海域的影响［J］.地球科学进展,2005,20(6):627-636.
[5]王存忠,牛生杰,王兰宁,等.中国近50 a来沙尘暴变化特征[J].中国沙漠,2010,30(4):933-939.
[6]Lee E H,Sohn B J.Recent increasing trend in dust frequency over Mongolia and Inner Mongolia regions and its association with climate and surface condition change[J].Atmospheric Environment,2011,45(27):4611-4616.
[7]刘拓.中国土地沙漠化经济损失评估[J].中国沙漠,2006,26(1):40-46.
[8]王涛,吴薇,薛娴.近50年来中国北方沙漠化土地的时空变化[J].地理学报,2004,59(2):203-212.
[9]王涛.我国沙漠与沙漠化科学发展的战略思考[J].中国沙漠,2008,28(1):1-7.
[10]Abd El-Kawy O R,Rd J K,Ismail H A,et al.Land use and land cover change detection in the western Nile delta of Egypt using remote sensing data[J].Applied Geography,2011,31(2):483-494.
[11]赵哈林,赵学勇,张铜会,等.我国西北干旱区的荒漠化过程及其空间分异规律[J].中国沙漠,2011,31(1):1-8.
[12]de Jong R,de Bruin S,de Wit A,et al.Analysis of monotonic greening and browning trends from global NDVI time-series[J].Remote Sensing of Environment,2011,115(2):692-702.
[13]Zhao X,Tan K,Zhao S,et al.Changing climate affects vegetation growth in the arid region of the northwestern China[J].Journal of Arid Environments,2011,75(10):946-952.
[14]朱震达.中国土地荒漠化的概念、成因与防治[J].第四纪研究,1998(2):145-155.
[15]董光荣,靳鹤龄,陈惠中,等.中国北方半干旱和半湿润地区沙漠化的成因[J].第四纪研究,1998(2):136-145. |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2011, Vol. 31 
