"胡焕庸线"两侧植被覆盖度地域分异的时空特征分析OA北大核心CSTPCD
Spatio-temporal Characteristics of Regional Differentiation of Vegetation Coverage on both Sides of the Hu Huanyong Line
探究"胡焕庸线"两侧植被覆盖度的地域分异对于生态环境保护与自然资源的可持续管理具有重要意义.本研究根据MODIS-NDVI遥感数据及相关研究资料,运用像元二分法量化了2000至2020年间植被覆盖的变化情况,并结合斜率分析、空间自相关分析、转移矩阵及相关分析法,系统分析了"胡焕庸线"东西两侧植被覆盖度的动态及降水对其的潜在影响.研究发现,中国植被覆盖度在"胡焕庸线"两侧展现出显著的空间异质性,西部地区普遍低于东部;冷点主要分布于线西,热点主要分布于线东.尽管过去21年间全国植被覆盖度经历了局部年度波动,但从整体趋势看呈上升态势,约有45%的地区植被覆盖水平实现了由低向高的转变.具体而言,"胡焕庸线"以西区域的年均植被覆盖度增长率约为0.003 5/a,而线东地区则达到0.005 9/a,且在各自区域内,植被显著增长的区域占比分别为53.22%和59.81%.此外,年降水量与年际间植被覆盖度的相关性在"胡焕庸线"两侧表现出空间上的差异化特征,即东部地区呈负相关,而西部则为正相关.综上所述,以"胡焕庸线"为界,中国的植被覆盖度在时间和空间上的分布特征凸显了其独特的地域分异性.本研究为理解我国植被生态系统的动态变化提供了重要依据.
Exploring the regional differentiation in vegetation cover across the"Hu Huanyong Line"holds significant implications for environmental conservation and sustainable management of natural resources.Based on MODIS-NDVI remote sensing data and related research data,we used the pixel dichotomy method to quantify the change of vegetation coverage between 2000 and 2020,and combined the slope analysis,spatial auto-correlation analysis,transfer matrix,and correlation analysis method to systematically analyze the dynamics of vegetation coverage on the east and west sides of"Hu Huanyong Line"and the potential impact of precipitation on it.The study found that the vegetation coverage in China showed significant spatial heterogeneity on both sides of the"Hu Huanyong Line",with the western region generally lower than that in the eastern region.Cold spots are predominantly located west of the line,while hot spots are mainly found to the east of the line.Although the national vegetation coverage has experienced local annual fluctuations over the past 21 years,an overall increasing trend is evident,with approximately 45%of areas have achieved the transition from low to high vegetation coverage.Specifically,the average annual growth rate of vegetation coverage in the west of"Hu Huanyong Line"was about 0.003 5/a,while that in the eastern region was 0.005 9/a.In the respective regions,the areas with significant vegetation growth accounted for 53.22%and 59.81%,respectively.Additionally,the correlation between annual precipitation and interannual vegetation coverage shows a spatial difference on both sides of the"Hu Huanyong Line",that is,the eastern region has a negative correlation,while the western region has a positive correlation.In summary,with the"Hu Huanyong Line"as the boundary,the spatiotemporal distribution characteristics of vegetation coverage in China highlight the unique regional differentiation.This research provides an important basis for understanding the dynamic changes of vegetation ecosystems in China.
厉彦玲;董超;王薪宇
山东农业大学信息科学与工程学院,山东 泰安 271018山东农业大学信息科学与工程学院,山东 泰安 271018||中国气象科学研究院,北京 100081
计算机与自动化
胡焕庸线植被覆盖度地域分异时空特征分析
Hu Huanyong Linefractional vegetation coverageregional differentiationspatiotemporal characteristics analysis
《山东农业大学学报（自然科学版）》 2024 (003)
335-346 / 12
国家自然科学基金项目(11701337);山东省自然科学基金项目(ZR2021MD096)
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