资源简介

摘要： 植被是陆地生态系统最重要的组成部分，在调节陆地碳循环过程和气候变化中起着关键作用。冬季降雪为植被生长提供良好的水分条件，加强冬季降雪与植被关系研究具有重要的生态意义。利用1982~2013年GIMMS NDVI数据，基于趋势分析研究了北疆4~10月植被覆盖的时空变化特征，并结合WRF模拟冬季降雪数据，采用基于栅格的相关性分析方法，分析了各月NDVI对冬季降雪的响应及不同生态系统之间大小的差异。结果表明：①北疆地区4~10月NDVI总体呈增加趋势，增加区域主要位于农田地区和高海拔草地，但准噶尔盆地中东部地区呈减少趋势；②区域内冬季降雪基本呈环状分布，中部少、四周高， 冬季降雪呈增加趋势；③冬季降雪与5、6月NDVI显著正相关的面积最大，且显著正相关区域主要位于准噶尔盆地的荒漠生态系统；④冬季降雪对整个研究区以及不同生态系统类型NDVI的影响具有显著的滞后性，对4~10月NDVI的影响均呈现先增大后减小的趋势，且对6月NDVI的影响最大。 关键词： NDVI;  WRF;  降雪;  生态系统;  北疆     Abstract: Vegetation is the most important component of terrestrial ecosystem，and plays a key role in regulating land carbon balance and climate change.In arid zones，vegetation growth during the growing season primarily depends on winter snowfall，and further research is required on the relationship between vegetation and winter snowfall.Based on GIMMS NDVI during the growing season (April to October )and winter snowfall data simulated by WRF in northern Xinjiang from 1982 to 2013，this study used trend analysis and correlation analysis pixel by pixel to investigate the spatial pattern of NDVI variation，correlation between NDVI and winter snowfall，and the influence of winter snowfall on different ecosystems.The results indicated that：NDVI increased in northern Xinjiang during the growing season，and the increased area is mainly located in farmland and high altitude meadow，while the middle and eastern parts of Junggar Basin showed a decreasing trend.In the study area，winter snowfall showed an increasing trend and the spatial distribution of winter snowfall presented a ring\|shape：winter snowfall increases from the central part to the surrounding area.The largest significantly positive correlation between winter snowfall and NDVI was in May and June，and was mainly concentrated in the desert ecosystem of Junggar basin.NDVI of different ecosystems in northern Xinjiang had the hysteresis to winter snowfall，and the impact of winter snowfall on monthly NDVI increases from April，peaks in June，then decreases until the end of the growth season.

相关资源

1. 水质遥感监测的关键要素叶绿素a的反演算法研究进展
2. 基于无人机遥感技术的森林参数获取研究进展
3. 基于无线传感器网络的森林生态系统观测试验平台构建
4. 基于无人机激光雷达的森林冠层高度分析
5. 多源时序国产卫星影像的森林火灾动态监测
6. 基于无人机遥感技术的台风灾害倒伏绿化树木检测

下载说明

·如果您发现该资源不能下载，请通知管理员.gissky@gmail.com

·为确保下载的资源能正常使用，请使用[WinRAR v3.8]或以上版本解压本站资源,缺省解压密码www.gissky.net ，如果是压缩文件为分卷多文件，请依次下载每一个文件，并按照顺序命名为1.rar,2.rar,3.rar...，然后鼠标右击1.rar解压.

·为了保证您快速的下载速度，我们推荐您使用[网际快车]等专业工具下载.

·站内提供的资源纯属学习交流之用,如侵犯您的版权请与我们联系.