Study on the snow distribution and influencing factors in northern tibet based on remote sensing information
文献类型：期刊论文
| 作者 | Zhang Jia-Hua1; Wu Yang2; Yao Feng-Mei3 |
| 刊名 | Chinese journal of geophysics-chinese edition
 |
| 出版日期 | 2008-07-01 |
| 卷号 | 51期号:4页码:1013-1021 |
| 关键词 | Snow cover Ssm/i data Remote sensing Influencing factors Northern tibet |
| ISSN号 | 0001-5733 |
| 通讯作者 | Zhang jia-hua(zhangjh@cams.cma.gov.cn) |
| 英文摘要 | Based on two kinds of remote sensing data (snow depth of special sensor microwave/imager ssm/i from 1993 to 2004, snow cover of noaa/avhrr from 1996 to 2004) and snow depth and snow cover days of six stations over northern tibet from 1966 to 2003, we studied snow cover distribution in temporal and spatial scales, and analyzed the influencing factors of snow in northern tibet region. the result showed that the remote sensing snow data (retrieval from ssm/i, noaa/avhrr) was in general agreement with the weather stations data. in temporal scale, for the seasonal cycle, during 1966 to 2003, the snow cover extent increased rapidly in autumn and winter seasons in northern tibet. however, in spring (march-april-may), snow cover extent did not show a continual decrease, whereas indicated a positive feedback. for the interannual cycle, from the end of 1960s the snow cover of northern tibet region reduced, but in 1980s, the snow cover increased as a whole, and from 1990s it decreased again. thus, the snow cover variation showed a reducing-increasing-reducing dynamic process in the study area. the result of a wavelet analysis on temporal distributions of annual cumulative snow cover indicated that there were mainly oscillation periods of quasi-2 similar to 3 yr, quasi-9 yr, quasi-13 yr, and from the beginning of 1970s to the middle of 1990s, there was an oscillation period about quasi-5 yr. in spatial scale, the east part of northern tibet region was the main snow cover area, where the snow cover days exceeded 15 ten-days in each winter-spring, and were obviously distinguished from the western part of northern tibet region. the majority of snow cover pixels exist in altitude of 4900 similar to 5600 m. the greatest variance of snow cover was found in middle and eastern part of the northern tibet plateau, i.e. andu and nierong regions. we selected two important factors influencing snow-cover i.e., temperature, precipitation) and calculated multiple linear regressions. the result showed that the correlation coefficient between simulated annual cumulative snow days and observation data was 0.74. it revealed that temperature and precipitation are the main factors influencing the snow cover in northern tibet region. global warming might be one reason causing snow cover declining in recent years in northern tibet region. however, the effect of precipitation seems larger than that of temperature. |
| WOS关键词 | COVER ; VARIABILITY ; CHINA ; HEAT |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000258061300009 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2387709 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang Jia-Hua |
| 作者单位 | 1.Chinese Acad Meteorol Sci, Lab Remote Sensing & Climate Informat Sci, Beijing 100081, Peoples R China 2.Zhejiang Meteorol Informat Ctr, Hangzhou 310017, Zhejiang, Peoples R China 3.Chinese Acad Sci, Grad Univ, Coll Earth Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Jia-Hua,Wu Yang,Yao Feng-Mei. Study on the snow distribution and influencing factors in northern tibet based on remote sensing information[J]. Chinese journal of geophysics-chinese edition,2008,51(4):1013-1021. |
| APA | Zhang Jia-Hua,Wu Yang,&Yao Feng-Mei.(2008).Study on the snow distribution and influencing factors in northern tibet based on remote sensing information.Chinese journal of geophysics-chinese edition,51(4),1013-1021. |
| MLA | Zhang Jia-Hua,et al."Study on the snow distribution and influencing factors in northern tibet based on remote sensing information".Chinese journal of geophysics-chinese edition 51.4(2008):1013-1021. |
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来源：中国科学院大学
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