[1]周梦甜,李军,朱康文.西北地区NDVI变化与气候因子的响应关系研究[J].水土保持研究,2015,22(03):182-187.
　ZHOU Mengtian,LI Jun,ZHU Kangwen.Changes of NDVI in Different Regions of Northwest Area and Its Responses to Climate Factor[J].Research of Soil and Water Conservation,2015,22(03):182-187.
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西北地区NDVI变化与气候因子的响应关系研究

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 22 期数: 2015年03期 页码: 182-187 栏目: 出版日期: 2015-06-28
Title:
Changes of NDVI in Different Regions of Northwest Area and Its Responses to Climate Factor
作者:
周梦甜1, 李军2, 朱康文1
1. 重庆师范大学 地理与旅游学院, 重庆 401331;
2. 重庆市高校GIS应用研究重点实验室, 重庆 401331
Author(s):
ZHOU Mengtian1, LI Jun2, ZHU Kangwen1
1. College of Geography and Tourism, Chongqing Normal University, Chongqing 401331, China;
2. Key Laboratory of GIS Application, Chongqing 401331, China
关键词:
NDVI; MVC最大合成法; SPSS; 时滞性
Keywords:
NDVI; MVC; SPSS; time delay
分类号:
P461+.7
摘要:
基于1998-2012年SPOT VEGETATION/NDVI数据，研究近15年来西北地区植被覆盖时空特征。通过时滞相关分析法，分析研究区不同地区植被对气温和降水的响应程度。结果表明：（1）西北地区总体植被覆盖率偏低，极低植被区分布较广，主要位于新疆东南大部以及内蒙古西北部；（2）西北地区退化区所占西北总面积比例小，主要位于新疆阿尔泰山脉周边、天山山脉以南和塔里木盆地以北。改善区范围分布分散，其中轻微改善区主要位于新疆天山周边、准格尔盆地边缘及甘肃东部；（3）年尺度来看，西北各地区NDVI年均值均出现缓慢增长的趋势，新疆、青海NDVI的年均值保持相对稳定；甘肃、宁夏、内蒙古西部NDVI的年均值在此期间先增加而后减少，起伏波动较大。月尺度，西北各地区NDVI多年平均月值呈现出明显的季节变化，因此与气温、降水等气候因子密切相关；（4）西北各地区NDVI与气温、降水的年际相关性不大，而年内相关性显著。新疆、宁夏NDVI对气温、降水不具有滞后性，而甘肃NDVI对气温具有明显滞后一个月的性质，青海地区NDVI对气温、降水的滞后性不明显，而内蒙古西部地区NDVI对气温具有明显滞后性而对降水具有及时性。
Abstract:
The spatial distribution and dynamic changes of vegetation in Northwest China were analyzed using SPOT/NDVI data during the period from 1998 to 2012. According to different regional NDVI, we analyzed the correlation between NDVI and climate factors such as temperature and precipitation. The results showed that：(1) vegetation coverage was low, the extremely low vegetation area was great in northwest China, and the extremely low vegetation area was mainly located in the southeast of Xinjiang and western Inner Mongolia; (2) degraded areas accounted for small proportion of total area of northwest China, and was mainly located in the Altai mountains, south of the Tianshan mountains and the north of Tarim Basin in Xinjiang. However, some areas had higher vegetation coverage that was improved slightly as a whole during the past years, the improved area was mainly located in surrounding of Tianshan mountains, edge of Junggar Basin and eastern Gansu; (3) on the annual scale, vegetation coverage in each area in northwest slowly increased in the recent 15 years, vegetation coverage in Xinjiang and Qinghai remained relatively stable, the vegetation coverage in Gansu, Ningxia and western region of Inner Mongolia presented the fluctuating trend, on the monthly scale, there were significant correlations between NDVI and both temperature and precipitation; (4) by comparison, the vegetation NDVI with temperature and precipitation had significant monthly correlations but less significant annual correlations in different areas. The responses of vegetation NDVI showed no significant time lag to temperature and precipitation in Xinjiang, Ningxia and Gansu, the response of NDVI exhibited noticeable lag to temperature, and NDVI to temperature and precipitation lag in Qinghai Province was not obvious. The NDVI of western region of Inner Mongolia had the lag to temperature, but it had no lag to precipitation.

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备注/Memo

收稿日期:2014-06-05;改回日期:2014-08-03。
基金项目:重庆师范大学资助项目（11XLB050）；国家自然科学资助项目（40701148）；公益性行业（气象）科研专项项目（GYHY201106025）；重庆市气象局开放式研究资助项目（Kfjj-201303）
作者简介:周梦甜(1990-),女,四川遂宁人,硕士研究生,研究方向为地图学与地理信息系统。E-mail:mengtianzhou@163.com
通讯作者:李军(1974-),男,天津人,副教授,主要从事农业遥感和地理信息系统应用研究。E-mail:zju_lijun@163.com

更新日期/Last Update: 1900-01-01