报告人：刘琳（副教授）

时间：2023.7.27 10:00-11:30

地点：测绘馆206会议室

报告人简介

  刘琳，香港中文大学理学院地球与环境科学课程副教授、地球与大气科学研究生学部主任、太空与地球信息科学研究所研究员、能源与可持续发展研究所研究员。主要从事将地球物理、大地测量、深度学习等技术应用于冰冻圈变化研究。2021年获AGU John Wahr青年科学家奖。

报告简介

   Permafrost has long been listed as a terrestrial Essential Climate Variable (ECV) by the Global Climate Observing System (GSOS). This talk reviews the applications and potential of geodetic methods to generate two ECV products: active layer thickness and rock glacier velocity. A few retrieval algorithms have been developed to take the geodetic measurements of seasonal elevation changes as the input to indirectly estimate active layer thickness and have achieved moderate success in a few case studies. Substantial improvements, especially incorporation with frozen ground hydro-thermal models and remote sensing products of soil moisture and ground surface temperature, are warranted to improve the accuracy and generalizability for generating reliable active layer thickness. Despite being just added as a new ECV product, rock glacier velocity has been routinely measured using various geodetic methods for years to decades. The geodesy community should be actively involved to provide inputs to the International Permafrost Association to standardize the measurement protocols for monitoring changes of rock glacier velocities around the globe.