利用归一化植被指数(NDVI)估算白俄罗斯境内生物气候潜势值的变化

V. Loginov, M. Khitrykau
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引用次数: 0

摘要

分析了生物气候势变化与作物状态变化之间的关系。NDVI(归一化植被指数)和d.i. Shashko (Bk)的生物生产力参数用于此目的。这两个参数的平均值在白俄罗斯境内一直在增加:自21世纪初以来,Bk值增加了10-15点,NDVI值增加了0.02-0.03点。它们之间的关系取决于植被的类型。当前的气候变化似乎对森林有利,但耕地的平均NDVI值一直在下降,尽管森林面积有所增加。造成这一现象的主要原因是植被状况与可利用水资源之间的高度相关(NDVI与降水之间的相关系数r为0.65 ~ 0.80),而根据TWSA(陆地蓄水异常)测量,近十年来植被状况与可利用水资源之间的相关性开始下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Estimation of changes in bioclimatic potential values on the territory of Belarus using normalised difference vegetation index (NDVI)
Relations between bioclimatic potential changes and changes in state of crops have been analysed. NDVI (normalised difference vegetation index) and biological productivity parameter by D. I. Shashko (Bk) were used for this purpose. Average values of both parameters have been increasing over the territory of Belarus: since the beginning of 21st century, Bk values increased by 10–15 points and NDVI values – by 0.02–0.03 points. Relations between them depend on the type of vegetation. Current climate changes appeared to be favorable for forests, but average NDVI values on the croplands have been decreasing despite Bk growth. The main reason for this is high correlation between state of vegetation and water resources available (correlation coefficient r between NDVI and precipitation is 0.65–0.80), which, according to TWSA (terrestrial water storage anomaly) measurements, have begun to decrease during the last decade.
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