Abstract

This paper presents the results of a trend and correlation analysis of the air temperature and the normalized difference vegetation index (NDVI) performed for the warm season in the taiga and tundra zones of West Siberia over the period of 1982–2015. Both in the taiga and tundra zones, a significant increase in NDVI values is observed in certain months of the spring–summer period amid significant (α = 0.05) positive air temperature trends. The air temperature and NDVI trends have been computed for the taiga and tundra zones from April to October over the period of 1982–2015; the irregularity of their spatial distribution in the study area is demonstrated. It is established that the vegetation development during the warm season is significantly determined by its development in the first month of the warm season (May for taiga and June for tundra). In the taiga zone, the NDVI value in May is formed under the influence of April and May temperatures; in the tundra zone, it is formed in June under the influence of June temperatures. However, the input of May temperatures into the formation of the tundra vegetation cover has increased in recent years due to climate warming. Significant correlation coefficients between the NDVI and averaged temperatures in April–May and May–June are typical for most of the study area, except for coastal northern regions in the first case and southwestern regions in the second case.

中文翻译：

---

基于卫星数据的1982-2015年西西伯利亚大河和苔原植被与气候相关的变化

摘要

本文介绍了1982-2015年期间西西伯利亚taiga和tundra地区暖季进行的气温和归一化植被指数（NDVI）的趋势和相关分析。在针叶林和苔原带，在春季至夏季的某些月份中，由于显着（α= 0.05）积极的气温趋势，NDVI值均显着增加。计算了1982–2015年4月至10月taiga和tundra地区的气温和NDVI趋势；证明了它们在研究区域中空间分布的不规则性。可以确定，温暖季节的植被发育在很大程度上取决于温暖季节第一个月的生长（针叶林为5月，苔原为6月）。在针叶林地区，5月的NDVI值是在4月和5月的温度影响下形成的；在苔原带，它是在六月温度的影响下于六月形成的。然而，由于气候变暖，近年来5月温度对苔原植被覆盖的形成的输入增加了。在大多数研究区域中，NDVI与4月至5月和5月至6月平均温度之间的显着相关系数是典型的，除了第一种情况下的北部沿海地区和第二种情况下的西南地区。近年来，由于气候变暖，5月温度对苔原植被覆盖形成的投入有所增加。在大多数研究区域中，NDVI与4月至5月和5月至6月平均温度之间的显着相关系数是典型的，除了第一种情况下的北部沿海地区和第二种情况下的西南地区。近年来，由于气候变暖，5月温度对苔原植被覆盖形成的投入有所增加。在大多数研究区域中，NDVI与4月至5月和5月至6月平均温度之间的显着相关系数是典型的，除了第一种情况下的北部沿海地区和第二种情况下的西南地区。