Abstract

On the basis of Earth remote sensing data for 2000–2020, quantitative estimates of the influence of vegetation cover degradation on the summer warming in Belarus have been obtained. The average leaf area index of Belarus for this period increased by 3.3%, mainly due to forest areas, the leaf index of which increased by about 8%. The growth of the leaf area index slowed down the summer warming of forest lands in the north (above 54° N) by about half and by more than a quarter in the south of Belarus. At the same time, the leaf area index of croplands decreased by about 5%, which caused their additional warming and amplified their land surface temperature daily cycle for the summer period. Statistically significant signs of bioclimatic land degradation have been found on the territory of Belarus with a total area of about 400 000 ha, which are enhanced by high values of positive feedback between temperature, vegetation cover, and soil moisture. About of 58% of the degrading lands are agricultural lands located mainly in the southern part of the country. On these lands, the summer temperature grows twice as fast as the average for Belarus, and the leaf index decreases at a rate of about 2% per year, which indicates the insufficiency of agriculture climate mitigation in certain regions of Belarus.

中文翻译：

---

白俄罗斯夏季地表温度与叶面积指数之间的前向和后向联系

摘要

基于2000-2020年地球遥感数据，定量估算了植被覆盖退化对白俄罗斯夏季变暖的影响。白俄罗斯本期平均叶面积指数增长了3.3%，主要得益于森林面积，其中叶指数增长了约8%。叶面积指数的增长使白俄罗斯北部（北纬54°以上）林地夏季变暖速度减缓了约一半，南部地区则减缓了四分之一以上。与此同时，农田叶面积指数下降了约5%，导致农田温度进一步升高，并放大了夏季地表温度的日周期。在总面积约 40 万公顷的白俄罗斯领土上发现了统计上显着的生物气候土地退化迹象，温度、植被覆盖和土壤湿度之间的高正反馈值增强了这种土地退化迹象。大约 58% 的退化土地是农业用地，主要位于该国南部地区。在这些土地上，夏季气温增长速度是白俄罗斯平均水平的两倍，树叶指数以每年约2%的速度下降，这表明白俄罗斯某些地区农业气候缓解措施的不足。