生态与农业气象研究进展  

Progress in Ecological and Agricultural Meteorology Research

出　　处：《中国气象科学研究院年报》2023年第1期76-99,共24页Annual Report of Cams

摘　　要：1生态气象1.20气候变化驱动下黄土高原刺槐林气候适宜性和脆弱性刺槐是黄土高原乡土树种,具有优良的水土保持和固碳功能。黄土高原生态恢复实践中实施了大规模的植树造林,刺槐林面积占沟壑丘陵区人工植树造林面积90%以上。由于种植时没有考虑刺槐的气候适宜性,一些地区的刺槐林出现了退化现象。采用最大熵模型,在0.5km×0.5km空间精度上分别模拟了1961—1990、1966—1995、1971—2000、1976—2005、1981—2010.1 Ecological meteorology 1.1 Comparison of lake extraction and classification methods for the Tibetan Plateau based on topographic-spectral information Accurate identification and extraction of lake boundaries are the basis of the accurate assessment of lake changes and their responses to climate change.To reduce the effects of lake ice and snow cover,mountain shadows,cloud and fog shielding,alluvial and proluvial deposits,and shoals on the extraction of lake boundaries on the Tibetan Plateau,this study developed an RNSS water index to increase the contrast between the lake and similar surface objects of the spectral curve,and constructed a new method flow for lake extraction on the Tibetan Plateau based on image synthesis,topographic-spectral feature indexes.

关 键 词：气候适宜性 刺槐林 乡土树种 植树造林 黄土高原 丘陵区 水土保持 最大熵模型 

分 类 号：S15[农业科学—土壤学]