[1]拉 巴,拉 珍,拉巴卓玛*,等.2000-2018年那曲市植被NDVI变化及气候变化响应[J].山地学报,2019,(04):499-507.[doi:10.16089/j.cnki.1008-2786.000442]
　LA Ba,LA Zhen,LA Ba Droma*,et al.NDVI Change and Its Response to Climate Change in Nag Qu City during 2000-2018[J].Mountain Research,2019,(04):499-507.[doi:10.16089/j.cnki.1008-2786.000442]
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2000-2018年那曲市植被NDVI变化及气候变化响应()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2019年04期
页码:
499-507
栏目:
山地环境
出版日期:
2019-07-30

文章信息/Info

Title:
NDVI Change and Its Response to Climate Change in Nag Qu City during 2000-2018
文章编号:
1008-2786-(2019)4-499-09
作者:
拉 巴1; 拉 珍1; 拉巴卓玛2*; 卓 嘎2
1. 西藏自治区气候中心,拉萨 850001; 2. 西藏高原大气环境科学研究所,拉萨 850001
Author(s):
LA Ba1; LA Zhen1; LA Ba Droma2*; ZHUO Ga2
1. Climate Center of Tibet Autonomous Region,Lhasa 850001, China; 2. Tibet Institute of Plateau Atmospheric and Environmental Science,Lhasa 850001, China
关键词:
MODIS;  NDVI;  气候因子;  那曲市
Keywords:
MODIS;  NDVI;  Meteorological factor;  Nag Qu city
分类号:
Q948; TP79~A
DOI:
10.16089/j.cnki.1008-2786.000442
摘要:
植被覆盖动态变化的监测对区域生态环境保护具有重要意义。本文基于2000-2018年MODIS NDVI产品和地面气象站点观测数据,利用MVC最大值合成法、线性趋势分析法、Hurst指数法分析了那曲市植被NDVI变化趋势,并通过相关性、偏相关性分析法研究不同时间尺度和不同植被类型NDVI变化对气候因子的响应特征。研究表明:近19年来那曲市植被NDVI总体上呈不显著减小趋势,稳定状态的植被所占比重最大,占64.5%,退化区面积略大于改善区面积,但差距不大。另外,高寒荒漠类、高山植被类和高寒草原类植被呈上升趋势,其中高寒荒漠类植被上升趋势较显著(R2=0.52,P<0.05),其余两类呈微弱的上升趋势; 灌木类草地、高寒草甸类和针叶林类植被呈微弱的下降趋势。从可持续性来看,植被NDVI处于不变弱反持续比重最大,占35.6%。持续退化和弱反持续改善型分别占全市面积的7.42%和8.26%,其他4种类型占总面积的13.69%。从气候特征上看,近年来那曲市以暖湿型气候为主,这种气候特点有利于植被的生长和恢复。水热因素作为植被生长的两个重要因子,在不同时间和空间尺度上对植被生长具有不同的特点,即NDVI与月平均气温和月降水量间存在显著正相关性。
Abstract:
The dynamic monitoring of vegetation coverage plays an important role in the protection of regional ecological environment. Based on NDVI of MODIS products and meteorological observations during 2000-2018, along with analytical methods to be used including MVC maximum synthesis, linear tendency analysis, Hurst index, correlation coefficient and partial correlation coefficient, in this research it studied the distribution of NDVI with different time scales and vegetation types and its corresponding characteristics to the climatic factors in Nag Qu city, Tibet, China. Results showed that NDVI had presented slightly decreasing tendency in the past 19 years. The proportion of stable vegetation occupied the maximum area accounting for 64.5%. The coverage of degraded vegetation was slightly larger than that of improved vegetation. Furthermore, the distribution of vegetation was different with various types. The vegetation in cold desert, alpine vegetation, and alpine grassland presented increasing tendency, and the tendency was quite obvious for alpine desert(R2=0.52, P<0.05)among them, while the vegetation of shrub grassland, alpine meadow, and the coniferous forest was on the decline slightly. Considering the sustainability, continuous degradation and weak anti-continuous improvement areas accounted for 7.42% and 8.26% of the whole city respectively, while the other four types accounted for 13.69%. In recent years, climate change exhibited a “warm and humid” trend over Nag Qu city which was beneficial for the growth and improvement of vegetation. As main factors for vegetation growth, water and heat had different influence on the vegetation at various spatial and temporal scale. Namely, the NDVI was closely positive to monthly temperature and precipitation.

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备注/Memo

备注/Memo:
收稿日期(Received date):2017-04-10; 改回日期(Accepted date):2019-06-05
基金项目(Foundation item):国家自然科学基金项目(41165002); 西藏自治区重点科技计划项目(XZ201703-GA-01); 西藏自治区科技厅自然基金项目(XZ2017ZRG-114)。[National Natural Science Foundation of China(41165002); Tibet Key Technology Plan(XZ201703-GA-01); Natural Foundation of Tibet Science and Technology Department(XZ2017ZRG-114)]
作者简介(Biography):拉巴(1983-),男,西藏拉萨人,硕士,主要从事遥感应用方面的研究。[LA Ba, male, born in Lasa, Tibet Autonomous Region, M.Sc., research on remote sensing application] E-mail:xilaba@sohu.com
更新日期/Last Update: 2019-07-30