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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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                    1992–2018年中國及其毗鄰地區土地覆蓋與景觀多樣性數據集
                    A dataset of land cover and landscape diversity in China and its adjacent areas (1992–2018)
                    : 2021 - 07 - 07
                    : 2021 - 07 - 14
                    极速快三
                    50 0 0
                    摘要&關鍵詞
                    摘要:土地覆蓋是陸地表層的自然狀態,表現為地表覆蓋的類型、數量以及空間異質性特征(如景觀多樣性)等,是自然過程和人類活動共同作用的結果。土地覆蓋數據是全球變化、物質與能量循環等研究和應用的基礎數據。遙感技術為土地覆蓋變化監測提供重要支撐,加深了人們對于土地覆蓋變化的驅動機制以及景觀多樣性響應的認識。本文以歐空局氣候變化中心生產的土地覆蓋數據為基礎,利用交叉步行表,經尺度轉換將原數據的離散土地覆蓋類型轉換為具有連續數值的植被功能類型(PFT)比例,并基于PFT計算香農多樣性指數,生產得到1992-2018年逐年0.05°的中國及其毗鄰地區(70-140°E,15-55°N)土地覆蓋與景觀多樣性數據集。該數據集具有時序長、分辨率高、定量化等優點,可應用于區域的植被覆蓋、景觀格局動態等方面的研究,也可為模型模擬、遙感反演等研究提供基礎底圖。
                    關鍵詞:土地覆蓋;植被功能類型;香農多樣性指數;遙感技術
                    Abstract & Keywords
                    Abstract:?Land cover is a natural condition of the land surface, presenting types and quantity of the observed (bio)physical cover, and spatial heterogeneity (e.g., landscape diversity), etc. It is shaped by the combined effect of natural processes and human activities. Land cover data play a crucial role of studies and applications of global change, matter and energy cycles. Remote sensing technology provides an important foundation of land cover change monitoring, and deepens understandings of driving mechanisms of land cover change and responses of landscape diversity. In this paper, the land cover data produced by the ESA Climate Change Initiative were applied to derive the plant functional type (PFT) ratio with continuous values from the discrete land cover type of the original data using a cross walking table after scaling. Then, the Shannon diversity index was calculated based on PFT. Finally, a dataset of land cover and landscape diversity of China and its adjacent areas (70-140°E, 15-55°N) from 1992 to 2018 with a resolution of 0.05° was produced. This dataset has the advantages of long time series, high resolution, and quantification. It can be applied to studies on regional vegetation coverage and landscape pattern dynamics. Besides, it can also provide basic maps for model simulation and remote sensing inversion.
                    Keywords:?land cover;?plant functional type;?Shannon diversity index;?remote sensing
                    稿件與作者信息
                    嚴濤
                    YAN Tao
                    金佳鑫
                    JIN Jiaxin
                    jiaxinking@hhu.edu.cn
                    朱青松
                    ZHU Qingsong
                    劉穎
                    LIU Ying
                    出版歷史
                    參考文獻列表中查看
                    中國科學數據
                    csdata