Evaluation of grassland dynamics in the northern-tibet plateau of china using remote sensing and climate data
文献类型：期刊论文
| 作者 | Zhang, Jiahua1; Yao, Fengmei2; Zheng, Lingyun1; Yang, Limin |
| 刊名 | Sensors
 |
| 出版日期 | 2007-12-01 |
| 卷号 | 7期号:12页码:3312-3328 |
| 关键词 | Grassland dynamic Noaa/avhrr Northern-tibet plateau Climate change Human activities |
| ISSN号 | 1424-8220 |
| 通讯作者 | Zhang, jiahua(zhangjh@cams.cma.gov.cn) |
| 英文摘要 | The grassland ecosystem in the northern-tibet plateau (ntp) of china is very sensitive to weather and climate conditions of the region. in this study, we investigate the spatial and temporal variations of the grassland ecosystem in the ntp using the noaa/avhrr ten-day maximum ndvi composite data of 1981-2001. the relationships among vegetation peak-normalized difference vegetation index (vp-ndvi) and climate variables were quantified for six counties within the ntp. the notable and uneven alterations of the grassland in response to variation of climate and human impact in the ntp were revealed. over the last two decades of the 20th century, the maximum greenness of the grassland has exhibited high increase, slight increase, no-change, slight decrease and high decrease, each occupies 0.27%, 8.71%, 77.27%, 13.06% and 0.69% of the total area of the ntp, respectively. a remarkable increase (decrease) in vp-ndvi occurred in the central-eastern (eastern) ntp whereas little change was observed in the western and northwestern ntp. a strong negative relationship between vp-ndvi and et0 was found in sub-frigid, semi-arid and frigid-arid regions of the ntp (i.e., nakchu, shantsa, palgon and amdo counties), suggesting that the et0 is one limiting factor affecting grassland degradation. in the temperate-humid, sub-frigid and sub-humid regions of the ntp (chali and sokshan counties), a significant inverse correlation between vp-ndvi and population indicates that human activities have adversely affected the grassland condition as was previously reported in the literature. results from this research suggest that the alteration and degradation of the grassland in the lower altitude of the ntp over the last two decades of the 20th century are likely caused by variations of climate and anthropogenic activities. |
| WOS关键词 | HIGH-RESOLUTION RADIOMETER ; AVHRR DATA ; NOAA AVHRR ; VEGETATION INDEXES ; GLOBAL DATA ; TEMPERATURE ; ECOSYSTEMS ; MODELS ; NDVI ; INFORMATION |
| WOS研究方向 | Chemistry ; Electrochemistry ; Instruments & Instrumentation |
| WOS类目 | Chemistry, Analytical ; Electrochemistry ; Instruments & Instrumentation |
| 语种 | 英语 |
| WOS记录号 | WOS:000252628300021 |
| 出版者 | MOLECULAR DIVERSITY PRESERVATION INT |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2382795 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang, Jiahua |
| 作者单位 | 1.Chinese Acad Meteorol Sci, LRSCIS, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Grad Univ, Coll Earth Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jiahua,Yao, Fengmei,Zheng, Lingyun,et al. Evaluation of grassland dynamics in the northern-tibet plateau of china using remote sensing and climate data[J]. Sensors,2007,7(12):3312-3328. |
| APA | Zhang, Jiahua,Yao, Fengmei,Zheng, Lingyun,&Yang, Limin.(2007).Evaluation of grassland dynamics in the northern-tibet plateau of china using remote sensing and climate data.Sensors,7(12),3312-3328. |
| MLA | Zhang, Jiahua,et al."Evaluation of grassland dynamics in the northern-tibet plateau of china using remote sensing and climate data".Sensors 7.12(2007):3312-3328. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。