...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Science of the total environment >Vegetation net primary productivity and its response to climate change during 2001-2008 in the Tibetan Plateau
【24h】

Vegetation net primary productivity and its response to climate change during 2001-2008 in the Tibetan Plateau

机译：青藏高原2001-2008年植被净第一性生产力及其对气候变化的响应。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Alpine ecosystems are highly sensitive to global climate changes. The Tibetan Plateau is one of the areas that are most sensitive to global climate change. Increases in temperature and changes in precipitation can impact the plateau's ecosystem productivity. Net primary productivity (NPP) is one of the most important factors in the carbon cycle of terrestrial ecosystems. In this paper, a light-use-efficiency model was used to estimate the net primary productivity in the Tibetan Plateau. The model is based on a 1-km×l-km-resolution map of vegetation type, multi-temporal 500-m-resolution MODIS data and daily meteorological data. The spatial distribution pattern and dynamic change of the annual NPP from 2001 to 2008 are analyzed. Then, we analyzed the response of the NPP to temperature and precipitation changes. The results show that the mean annual NPP of alpine ecosystems in the Tibetan Plateau is equal to 0.472 Pg C and that the NPP exhibits significant seasonal and interannual variation due to the combined effects of temperature and precipitation changes. Finally, to analyze the effect of temperature and precipitation on the inter-annual change of the NPP, the correlation coefficient between temperature, precipitation and the NPP was computed. It was found that the relations among air temperature, precipitation and the NPP in the Tibetan Plateau region are different. The annual average temperature increase had a significantly positive effect on the vegetation NPP (R~2 = 0.83). In contrast, the annual precipitation changes had a weakly negative effect on the vegetation NPP (R~2 = 0.373).
机译：高山生态系统对全球气候变化高度敏感。青藏高原是对全球气候变化最敏感的地区之一。温度升高和降水变化会影响高原的生态系统生产力。净初级生产力（NPP）是陆地生态系统碳循环中最重要的因素之一。本文采用光利用效率模型估算青藏高原的净初级生产力。该模型基于1 km×l km分辨率的植被类型图，多时相500 m分辨率的MODIS数据和每日气象数据。分析了2001-2008年全年核电厂的空间分布格局和动态变化。然后，我们分析了NPP对温度和降水变化的响应。结果表明，青藏高原高山生态系统的年平均NPP等于0.472 Pg C，并且由于温度和降水变化的共同影响，NPP表现出明显的季节和年际变化。最后，为了分析温度和降水量对NPP年际变化的影响，计算了温度，降水量与NPP之间的相关系数。研究发现，青藏高原地区气温，降水与NPP之间的关系不同。年平均温度升高对植被NPP有显着的正效应（R〜2 = 0.83）。相比之下，年降水量变化对植被NPP的影响较小（R〜2 = 0.373）。

著录项

  • 来源
    《Science of the total environment》 |2013年第1期|356-362|共7页
  • 作者

    Yanhua Gao; Xu Zhou; Qiao Wang; Changzuo Wang; Zhiming Zhan; Liangfu Chen; Junxia Yan; Ran Qu;

  • 作者单位

    Satellite Environment Center, Ministry of Environment Protection, Beijing 100094, China Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;

    National Ceomatics Center of China, Beijing 100830, China;

    Satellite Environment Center, Ministry of Environment Protection, Beijing 100094, China;

    Satellite Environment Center, Ministry of Environment Protection, Beijing 100094, China;

    Satellite Environment Center, Ministry of Environment Protection, Beijing 100094, China;

    State Key Laboratory of Remote Sensing Science jointly sponsored by Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Beijing 100101, China;

    Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China;

    Satellite Environment Center, Ministry of Environment Protection, Beijing 100094, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Net primary productivity; Climate change; Tibetan Plateau;

    机译：净初级生产力;气候变化;青藏高原;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号