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青藏高原植被覆盖对水热条件年内变化的响应及其空间特征
  • ISSN号:1007-6301
  • 期刊名称:地理科学进展
  • 时间:0
  • 页码:507-512
  • 语言:中文
  • 分类:P342.4[天文地球—水文科学;天文地球—地球物理学]
  • 作者机构:[1]中国科学院地理科学与资源研究所,北京100101, [2]江西师范大学地理环境学院,南昌330008
  • 相关基金:国家科技支撑计划项目(2007BAC06B08); 国家重点基础研究发展计划(2005CB422006); 国家自然科学基金项目(40771206)在数据处理过程中得到中国科学院地理科学与资源研究所陶波博士的帮助,王秀红和朱会义老师对本文提出过宝贵的修改意见,在此一并致谢.
  • 相关项目:基于全球定位系统的高寒草地退化研究-以黄河源区为例
中文摘要:

利用1982-2000年NOAA/AVHRR卫星的NDVI数据(时间分辨率旬,空间分辨率8 km×8 km),结合同时期的气温和降水资料,基于时滞互相关方法和GIS工具,分析了青藏高原植被覆盖对水、热条件年内变化的时滞响应及其空间特征。结果如下:①除高寒荒漠、森林外,青藏高原植被NDVI与同期旬均温和旬降水相关性均呈高度正相关。其中,中等覆盖度的植被受水、热影响表现更为强烈。②青藏高原植被NDVI对气温和降水有滞后效应,且滞后水平存在空间差异,高原北部(柴达木盆地、昆仑山北冀)和高原南部植被对降水、和温度的响应比较迟缓,而高原中、东部地区植被对温度和降水的响应比较敏感。③不同植被类型对水热条件的响应程度也存在差异,由高到低依次是草甸、草原、灌丛、高寒垫状植被、荒漠,最后是森林。

英文摘要:

Today,human activities become more and more intense.How to minimize human disturbance is very important in the study of the relationship between vegetation and climate.The Tibetan Plateau,as one of the few extensive regions escaped from human disturbance,provides an ideal site for studies on the response of natural vegetation cover to water/thermal conditions.Based on the trend surface of TN(short for time series of ten-day NDVI),TP(short for time series of ten-day rainfall) and TT(short for time series of ten-day temperature),which all are multi-year means,ARCGIS9.2 software and lag cross-correlation method are used to analyze the temporal and spatial characteristics of the relationships between water/thermal climate elements and vegetation cover.The main results are as follows:(1) Except high-cold desert vegetation and forest vegetation,the TN has very good correlation with TT and TP on the Tibetan Plateau,especially in the areas with a vegetation cover of moderate density,such as meadow and grassland.(2) NDVI has a hysteresis effect towards temperature and precipitation and in the northern part(Qaidam Basin and the north of Kunlun Mountains) and southern part of the Tibetan Plateau,the vegetation responds to the water/thermal changes slowly,but in the middle and east parts of the Tibetan Plateau,the vegetation responds to the water/thermal changes quickly;(3) Different vegetation types respond to water/thermal condition differently.The descending order of the responding degree for each vegetation type is: alpine cold meadow,alpine cold grassland,alpine cold brush,periglacial cushion vegetation,desert,and forest.

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期刊信息
  • 《地理科学进展》
  • 北大核心期刊(2011版)
  • 主管单位:中科院出版委员会
  • 主办单位:中国科学院地理科学与资源研究所
  • 主编:李秀彬
  • 地址:北京安外大屯路甲11号917大楼
  • 邮编:100101
  • 邮箱:editor@progressingeograply.com
  • 电话:010-64889313
  • 国际标准刊号:ISSN:1007-6301
  • 国内统一刊号:ISSN:11-3858/P
  • 邮发代号:2-940
  • 获奖情况:
  • 全国中文核心期刊
  • 国内外数据库收录:
  • 日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版),中国北大核心期刊(2000版)
  • 被引量:30394