The first 10 m resolution thermokarst lake and pond dataset for the Lena Basin in the 2020 thawing season  

作　　者：Yining Yu Fengming Hui Yu Zhou Chong Liu Xiao Cheng 

机构地区：[1]School of Geospatial Engineering and Science,Sun Yat-sen University,and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai,China [2]Key Laboratory of Comprehensive Observation of Polar Environment,(Sun Yat-sen University),Ministry of Education,Zhuhai,China [3]Guangdong Provincial Key Laboratory of Geodynamics and Geohazards,School of Earth Sciences and Engineering,Sun Yat-sen University,Zhuhai,China

出　　处：《Big Earth Data》2024年第2期302-332,共31页地球大数据（英文）

基　　金：supported by the National Science Fund for Distinguished Young Scholars[41925027].

摘　　要：Climate warming rates in the Arctic are far greater than the global average,exerting stronger impacts on permafrost degradation and thermokarst landform development.Thermokarst lakes and ponds(TLPs),which are widely distributed in the Lena Basin in the Russian Arctic,play a vital role in altering local ecosystem.However,the detailed distribution of TLPs in the Lena Basin still remains poorly known.In this study,we built the first 10 m resolution TLP dataset for the Lena Basin in the 2020 thawing season by utilizing 4902 Sentinel-2 images.A robust mapping workflow was developed and implemented in the Google Earth Engine(GEE)platform.The accu-racy assessment demonstrates a satisfactory accuracy(93.63%),and our results exhibit a better consistency with real TLPs than global water body products.A total of 380,477 TLPs(~0.53%of the total surface area of the Lena Basin)were identified,showing an uneven distribution in the five sub-basins.The TLPs were found to be mainly located within plain areas,with an active layer thickness in the range of 80-100 cm.The higher ground ice content and mean annual ground temperature were favorable for TLP development.This dataset will be valuable for investigating the complex interac-tion between TLPs and permafrost.It will also serve as a baseline product for better incorporating thermokarst processes into perma-frostclimate models.

关 键 词：Thermokarst lakes and ponds Lena Basin PERMAFROST GEE Sentinel-2 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]