GLOBAL-LargeLakes-2018-2019

Using the MODIS 8-day surface reflectance data (MOD09Q1, MYD09Q1) from 2018 to 2019, we have produced the data set for the typical global lakes (including Poyang Lake, Aral Sea, Lake Victoria and Lake Venant, the Great Lakes, Lake Titicaca and Lake Eyre) with 500 m resolution every 8 days from 2014 to 2017 by using the spectral characteristics of water body. The data range of this data set is 1-46. 1 indicates that the area has been flooded for 8 days in a year, 2 indicates that the area has been flooded for 16 days in a year and 46 indicates that the area has been flooded for the whole year. Larger data value indicates more flooded days.

本研究依托2018至2019年的中分辨率成像光谱仪（MODIS）8天地表反射率数据（MOD09Q1、MYD09Q1），结合水体光谱特征，构建了2014至2017年的全球典型湖泊数据集。该数据集空间分辨率为500米，时间分辨率为每8天一期，涵盖的典型湖泊包括鄱阳湖、咸海、维多利亚湖、韦南特湖、北美五大湖、的的喀喀湖与艾尔湖。该数据集的数值取值范围为1至46：其中1代表该区域一年内累计受淹8天，2代表一年内累计受淹16天，46代表该区域全年均处于受淹状态；数值越大，代表该区域年内受淹天数越多。