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                    國家科學數據中心聯合???/a> 最新來稿(未評審) ? 版本 ZH1
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                    黃河流域250m分辨率植被生長季時空演變數據集(2000–2020年)
                    250 m resolution dataset of spatiotemporal variations of vegetation in the growing season over the Yellow River Basin (2000–2020)
                    白燕,楊雅萍,孫九林
                    : 2021 - 07 - 14
                    : 2021 - 07 - 14
                    极速快三
                    79 0 0
                    摘要&關鍵詞
                    摘要:黃河流域是我國重要的生態屏障區,在經濟社會發展和生態安全等方面的作用舉足輕重。植被的時空變化格局與趨勢是評估區域生態恢復狀況以及揭示氣候變化和人類活動對生態系統影響的重要指標。本研究基于MODIS植被指數產品(MOD13Q1,C6),通過投影轉換、鑲嵌裁剪和最大值合成等預處理,采用非參數Theil-Sen趨勢估算與Mann-Kendall顯著性檢驗,以及變異系數等方法,生成了2000–2020年黃河流域250 m分辨率植被生長季時空演變數據集,包含植被NDVI和EVI的變化趨勢及其波動性特征等信息。通過數據共享,期望為全球變化背景下黃河流域植被生態系統過去、現在、未來演變規律的深入認知提供重要參考。
                    關鍵詞:黃河流域;植被指數;Mann-Kendall檢驗;變異系數;生長季
                    Abstract & Keywords
                    Abstract:?The Yellow River Basin (YRB) is a significant ecological barrier region in China and plays a pivotal role in the economic and social development as well as the ecological security. In view of assessing the status of regional ecological restoration and revealing the impacts of climate change and human activities on ecosystems, the spatiotemporal patterns and trends of vegetation dynamics are imperative indicators. Based on the MODIS vegetation index product (MOD13Q1, C6), we generate a dataset of spatiotemporal variations of vegetation NDVI and EVI in the growing season over the YRB from 2000 to 2020, with a resolution of 250 m. The dataset is obtained using approaches including projection, mosaicking, clipping, maximum value composites, non-parametric Theil–Sen estimator and Mann–Kendall significance test, and coefficient of variation. In addition, the dataset contains information on the time series change trends and volatility characteristics of both NDVI and EVI in the YRB during past 21 years. This datasets is expected to provide an important reference for in-depth understanding the past, present, and future evolution of vegetation ecosystem in the YRB under the background of global change.
                    Keywords:?Yellow River Basin;?vegetation index;?Mann-Kendall test;?coefficient of variation;?growing season
                    稿件與作者信息
                    白燕
                    Bai Yan
                    baiy@lreis.ac.cn
                    楊雅萍
                    Yang Yaping
                    孫九林
                    Sun Jiulin
                    出版歷史
                    參考文獻列表中查看
                    中國科學數據
                    csdata