基于MODIS每日积雪产品的青藏高原湖冰物候数据集（2001-2020）

该数据集提供了2001-2020年青藏高原71个湖泊的湖冰物候，包括开始冻结日、完全冻结日、开始消融日、完全消融日、完全封冻时间和湖冰覆盖时间。数据集采用动态阈值法提取自经过双星去云和临近日去云后的MODIS每日积雪产品。与粗分辨率被动微波AMSR-E/2湖冰物候数据集对比，开始冻结日的平均绝对误差为2.33-7.25天，完全消融日的平均绝对误差为1.75-4.67天。该数据可为青藏高原湖泊系统响应气候变化的相关研究提供数据基础。

This dataset provides lake ice phenology data for 71 lakes on the Qinghai-Tibet Plateau from 2001 to 2020, covering parameters including initial freezing date, complete freezing date, initial melting date, complete melting date, total frozen duration, and total lake ice cover duration. The dataset is extracted using the dynamic threshold method from MODIS daily snow cover products that have undergone dual-satellite cloud removal and near-daily cloud removal. Compared with the coarse-resolution passive microwave lake ice phenology dataset from AMSR-E/2, the mean absolute error of the initial freezing date ranges from 2.33 to 7.25 days, and that of the complete melting date ranges from 1.75 to 4.67 days. This dataset can serve as a foundational data resource for studies investigating the responses of lake systems on the Qinghai-Tibet Plateau to climate change.

搜集汇总

背景与挑战

背景概述

该数据集提供了2001-2020年青藏高原71个湖泊的湖冰物候信息，包括冻结和消融的关键日期。数据通过动态阈值法从MODIS每日积雪产品中提取，与被动微波数据集相比具有较高的精度，适用于研究湖泊系统对气候变化的响应。