中国“平原-山地”地形过渡带NDVI时空变异与气候响应

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 中国“平原-山地”地形过渡带NDVI时空变异与气候响应 DOI: 10.5846/stxb202202190399 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金-河南区域创新发展重点资助项目（U21A20108）；河南省高校科技创新团队支持计划项目（22IRTSTHN008） Spatio-temporal variation and its response to climate change of NDVI in the terrain transition zone, China Author: Affiliation: Fund Project: Supported by the National Natural Science Foundation of China ( No. U21A20108), and Scientific and Technological Innovation Team of Universities in Henan Province (No. 22IRTSTHN008) 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:研究地形过渡带植被的地形效应，边缘效应，及其对纬度、气候变化的响应，将为我国山地生态格局和资源禀赋的深层认知提供地学参考。利用1982-2015年第三代全球库存建模和制图研究归一化植被指数数据集（GIMMS NDVI3g v1）和年均气温、降水等气象数据，分别进行最大值合成、趋势分析、突变分析、变异分析和相关分析，揭示了中国近南北走向的"平原-山地"地形过渡带（简称"地形过渡带"）植被物候的时空变化规律及对气候变化的响应特征。研究表明：（1）"地形过渡带"跨越一年三熟的低纬度地区，到一年两熟的中纬度地区，再到一年一熟的高纬度地区的周期性植被物候特征区；（2）34年间，年际NDVI整体呈增长趋势，其中植被改善区域占58.84%；年内分析表明"地形过渡带"植被生长期（LOS）变化率-3.16 d/纬度；（3）34年间"地形过渡带"的年均气温呈现升高趋势，每10年上升速率为0.098-0.386℃之间；年均降水呈现减少趋势，每10年下降速率为8.29-31.82 mm；（4）34年间NDVI变异系数结果表明，研究区NDVI低波动变化和相对较低波动变化的面积占比达95.52%，说明研究区植被呈稳中向好趋势；（5） NDVI与年均气温的相关性随着纬度的升高而减弱，表明南方植被对气温变化敏感；NDVI与年均降水量的相关性随着纬度的升高而升高，表明北方植被对降水变化敏感。 Abstract:Due to its huge differences in longitude, latitude, and elevation, the transition zone between the second and third steps provides a unique natural profile for basic environmental research on physical geography and human settlements in mainland China. In terrain transition zone, the topographic and marginal effects of vegetation, and their responses to latitude and climate change will provide a geographical reference for in-depth understanding of the ecological pattern and resource endowment of mountainous areas in China. Based on the GIMMS NDVI3g v1 dataset, annual mean temperature and precipitation data from 1982 to 2015, combined with the maximum value synthesis, trend analysis, mutation analysis, variation analysis, and correlation analysis, this paper reveals the spatiotemporal variation trend and response characteristics to climate change of vegetation phenology in terrain transition zone of "plain-mountain" near the north-south direction between the second and third steps of China. The results show that:(1) The terrain transition zone is a periodical vegetation phenological characteristic region which spans the low-latitude region with three crops a year, the mid-latitude region with two crops a year, and the periodic vegetation phenology zone in the high-latitude region with one crop a year; (2) During 34 years, the inter-annual NDVI showed an increasing trend, of which the vegetation improvement area accounted for 58.84%; the inner-annual analysis showed that the vegetation growth period (LOS) change rate of the terrain transition zone was -3.16 d per latitude; (3) The annual average temperature of the terrain transition zone in the 34 years showed an increasing trend with an increase rate from 0.098℃ to 0.386℃ per 10 a, while the annual average precipitation showed a decreasing trend with a decrease rate from 8.29 mm to 31.82 mm per 10 a; (4) The NDVI variation coefficient analysis showed that low volatility change area and relatively low volatility change area accounted for 95.52%, presenting a stable and positive trend; (5) The correlation between NDVI and annual mean temperature decreased as latitude increased, indicating that southern vegetation was sensitive to temperature changes; while the correlation between NDVI and annual mean precipitation increased as latitude increased, indicating that northern vegetation was sensitive to precipitation changes. Vegetation distribution and climate change in terrain transition zone of "plain-mountain" have topographic effects; In the mountain-plain junction zone, due to the human-land conflict caused by urban expansion, the vegetation distribution around the city has a marginal effect. 参考文献 相似文献 引证文献