Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3319/TAO.2012.11.01.01(TibXS) |
Decadal Variation in Surface Characteristics over Xinjiang, Western China, from TAP Altimetry Backscatter Coefficients: Evidence of Climate Change | |
Guo, Jinyun1,2; Yang, Lei1; Liu, Xin1; Chang, Xiaotao2,3; Hwang, Cheinway4 | |
通讯作者 | Guo, Jinyun |
来源期刊 | TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
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ISSN | 1017-0839 |
出版年 | 2013 |
卷号 | 24期号:4页码:565-579 |
英文摘要 | The backscatter coefficient, known as sigma0, is an important measurement of satellite radar altimetry and a key parameter for land altimetry because of its close relationship with the physical properties and geometric features of land coverage under global/regional climate change effects. Using the TOPEX/Poseidon GDR-M dataset from January 1993 to December 2004, we study the spatial and temporal distribution of sigma at bands Ku and C over Xinjiang, western China. The results show that the sigma0 is influenced by the water distribution over land and the time evolution of sigma0 has clear seasonal changes. River basins or deserts are classified over the spatial distribution based on different sigma0 values. For example, high sigma0 values are found in the Tarim River Basin and low values are found in the Taldimakan Desert. The periodic components of sigma0 time series are determined using the fast Fourier transformation method. The annual variation is the dominating cycle and the semi-annual variation is the secondary signal. The amplitudes of sigma0 time series at bands Ku and C are also given and most areas have quite low amplitudes except for the Tarim River Basin. Several areas including the Tarim River Basin, Tianshan Mountain and Taldimakan Desert are selected for sigma0 time series spacial analysis to discuss the reasons for variations in sigma0. The main factors are precipitation and vegetation growth, which are affected by the global/regional climate change. The correlation between the brightness temperature, which is related to the water-vapor content in the atmosphere measured by TMR at the 21 GHz channel and sigma0 at two bands, is analyzed. |
英文关键词 | Xinjiang Satellite radar ahimetry Backscatter coefficient Geographical condition monitoring TOPEX/Poseidon |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; Taiwan |
收录类别 | SCI-E |
WOS记录号 | WOS:000329894700010 |
WOS关键词 | LAKE LEVEL VARIATIONS ; WAVE-FORM RETRACKING ; SATELLITE ALTIMETRY ; RADAR ALTIMETER ; WIND-SPEED ; PRECIPITATION ; LINKS ; SEA |
WOS类目 | Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Oceanography |
WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences ; Oceanography |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/180088 |
作者单位 | 1.Shandong Univ Sci & Technol, Coll Geodesy & Geomat, Qingdao, Peoples R China; 2.Key Lab Surveying & Mapping Isl & Reef NASMG, Qingdao, Peoples R China; 3.Satellite Surveying & Mapping Applicat Ctr NASMG, Beijing, Peoples R China; 4.Natl Chiao Tung Univ, Dept Civil Engn, Hsinchu, Taiwan |
推荐引用方式 GB/T 7714 | Guo, Jinyun,Yang, Lei,Liu, Xin,et al. Decadal Variation in Surface Characteristics over Xinjiang, Western China, from TAP Altimetry Backscatter Coefficients: Evidence of Climate Change[J],2013,24(4):565-579. |
APA | Guo, Jinyun,Yang, Lei,Liu, Xin,Chang, Xiaotao,&Hwang, Cheinway.(2013).Decadal Variation in Surface Characteristics over Xinjiang, Western China, from TAP Altimetry Backscatter Coefficients: Evidence of Climate Change.TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,24(4),565-579. |
MLA | Guo, Jinyun,et al."Decadal Variation in Surface Characteristics over Xinjiang, Western China, from TAP Altimetry Backscatter Coefficients: Evidence of Climate Change".TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES 24.4(2013):565-579. |
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