Data for: Extensive vegetation browning and drying in forests of India's Tiger Reserves

Data and code used to assess trends in forest vegetation condition in India's Tiger Reserves, using historical Landsat 5 TM data. The Javascript code is to be run on Google Earth Engine Code Editor (sign-up required). See 00_README.txt or 00_README.html or 00_README.md for details. The algorithm matches 25 study Tiger Reserves with a Wildlife Sanctuary each. For each of these matched pairs, the Landsat 5 TM timeseries data are divided into 'before' and 'after' epochs based on the Tiger Reserve's year of declaration. A before-after control-impact-style analysis is performed to assess vegetation condition in Tiger Reserves compared to their matched Wildlife Sanctuaries. The GeoTIFF files are park-wise multiband geo-referenced result rasters, and one CSV file contains a table of park-wise summary results, and the other contains attributes of each study Tiger Reserve and its selected and candidate matched Wildlife Sanctuaries. Code was written by PK.本数据集与配套代码用于评估印度老虎保护区内森林植被状况的变化趋势，所用数据源为历史Landsat 5 TM（陆地卫星5号主题制图仪）数据。配套JavaScript代码需在Google Earth Engine Code Editor（谷歌地球引擎代码编辑器，需注册后方可使用）中运行。详细说明请参阅00_README.txt、00_README.html或00_README.md文件。 该算法将25处研究用老虎保护区与各自对应的野生动物保护区进行配对。针对每一组匹配对，基于该老虎保护区的正式设立年份，将Landsat 5 TM时间序列数据划分为“设立前”与“设立后”两个时段。随后采用前后对照-影响控制（before-after control-impact, BACI）分析范式，对比老虎保护区与其匹配的野生动物保护区的植被状况，以评估其植被变化效果。 数据集包含两类GeoTIFF（地理标记栅格文件格式）文件：其一为按保护区划分的多波段地理参考结果栅格；另有两个CSV（逗号分隔值格式）文件，其一存储按保护区汇总的统计结果表格，其二则包含所有研究用老虎保护区及其匹配、候选匹配野生动物保护区的属性信息。 本代码由PK编写。