地理学报 ›› 2014, Vol. 69 ›› Issue (s1): 61-64.doi: 10.11821/dlxb2014S011

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青藏高原草地退化类型空间分布数据集

王靓1, 2, 徐新良1, 刘洛2, 3   

  1. 1. 中国科学院地理科学与资源研究所, 北京 100101;
    2. 中国科学院大学, 北京 100049;
    3. 中国科学院新疆生态与地理研究所, 乌鲁木齐 830011
  • 收稿日期:2014-03-20 修回日期:2014-06-20 出版日期:2014-12-26 发布日期:2020-04-07
  • 通讯作者: 徐新良 (1972-), 副研究员, 硕士生导师, 主要从事土地利用土地覆被变化研究。E-mail: xuxl@lreis.ac.cn
  • 作者简介:王靓 (1992-), 女, 长春人, 硕士研究生, 主要从事地理信息的应用研究。E-mail: wangln808@126.com
  • 基金资助:
    国家科技支撑计划“陆地生态系统遥感监测技术研究与应用” (2013BAC03B01)

Remotely sensed dataset of grassland degradation on the Qinghai-Tibet Plateau

ZHANG Yili, LI Bingyu, ZHENG Du   

  1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2014-03-20 Revised:2014-06-20 Online:2014-12-26 Published:2020-04-07
  • Supported by:
    National Key Project of Scientific and Technical Supporting Programs, No.2013BAC03B01

摘要: 青藏高原拥有丰富的草地资源,对我国畜牧业生产发展、涵养水源及全球气候变化具有重要的作用。然而,近几十年来,在季节性过度放牧和开矿采金等人为干扰因素,以及气候暖干化和鼠虫害等不利自然因素的影响下,青藏高原草地退化明显。青藏高原草地退化类型空间分布数据集 (GLD_Tibet) 是基于连续时间序列的AVHRR-NDVI 数据和 SPOT-NDVI 数据,采用Sense趋势度和Mann-Kendall变化趋势检验的方法获取的。该数据集包括1991-2000年和2001-2012年两期青藏高原草地退化类型空间分布数据,有效反映了青藏高原草地退化类型和程度的空间差异,对揭示全球气候变化和人类干扰影响下的青藏高原草地退化时空过程具有重要的参考价值。

关键词: 青藏高原, 草地退化, 遥感监测, 空间数据

Abstract: The Tibetan Plateau (TP) is an unique geomorphic region composed of specific geomorphic types, such as extreme high mountains, hills, plains, and plateaus of high altitude or sub-high altitude. There are different opinions as to the exact scope of the TP. According to the latest results of long-term fieldwork, questions related to the area and boundaries of the TP were reviewed geographically. The geomorphologic features were used to define the boundary. A 1?1,000,000 geomorphologic map was compiled based on a 1?100,000 aerial photographic map, a 1?500,000 topographic map, and the interpretation of satellite images. The boundary of the TP was delineated by referring to a relief map in 1?3,000,000 scale. The position of the boundary was quantitatively determined with GIS, and an electronic version of the map of the TP was compiled. The main conclusion is that: the TP starts from the southern edge of the Himalayan Range (not including the low Himalayas Mountains); abuts India, Nepal and Bhutan; connects to the northern edge of Kunlun, Altun and Qilian Mountains; and joins the Tarim Basin and Hexi Corridor in Central Asia. To the west of the TP are the Pamir and Karakorum Mountains, bordering on Kyrgyzstan, Tajikistan, Afghanistan, Pakistan, and Kashmir. To the east of it are the Yulong Jokul, Daxueshan, Jiajin, and Qionglai Mountains as well as the south or east piedmont of the Mt. Minshan. The TP joins the Qinling Mountains and the Loess Plateau in its eastern and northeastern part. It ranges from 25°59′37″N to 39°49′33″N, and from 73°29′56″E to 104°40′20″E, covering an area of 2542.30×103 km2, with a total boundary length of about 11,745.96 km.

Key words: Tibetan Plateau, geographical unit, boundary, area, dataset