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植物覆盖的变化及其对黄河流域极端气候的反应

Jian Liu¹, Lihong Wei¹, Zhaopei Zheng¹

¹College of Geography and Environment, Shandong Normal University, Jinan 250358, China.

The Science of the total environment

|September 27, 2023

概括

黄河盆地 (YRB) 的植被生长正在改善,正常化差异植被指数 (NDVI) 显著上升. 植被对气候极端的反应在空间和时间上有所不同,显示出滞后的效应.

科学领域:

生态生态学生态生态学
气候科学气候科学
遥感遥感遥感遥感

背景情况:

气候变化正在增加极端气候事件的频率和严重性.
植被生长对这些极端气候事件非常敏感.
了解植被反应对于生态管理至关重要.

研究的目的:

为黄河流域 (YRB) 创建一个高分辨率的长期规范差异植被指数 (NDVI) 数据集.
在YRB中分析NDVI的时空变异性.
研究植被覆盖对极端气候事件的反应.

主要方法:

使用剩余网络对GIMMS NDVI和MODIS NDVI数据进行同化.
为YRB.生成一个高分辨率,长时间序列的NDVI数据集.
使用气象数据分析植被反应.

主要成果:

在YRB显著增加NDVI (平均增长率为0.019/10a),与从东南到西北的空间变化.
在YRB中对极端温度有差异性的NDVI反应;对极端降水有更强烈的反应 (与CWD负相关,与PRCPTOT正相关).
对气候极端的NDVI反应滞后,极端温度的滞后时间比降水时间更长.

结论:

尽管季节性和空间变化,YRB的整体植被覆盖面正在改善.
植被表现出对温度和降水极端的复杂反应,包括滞后效应.
调查结果支持YRB的未来植被管理和生态监管,以实现可持续发展.

关键词:

极端的气候变化可能导致极端气候变化.NDVI NDVI 在线阅读剩余网络的残余网络黄河流域的黄河流域

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