報告人：劉琳（副教授）
時間：2023.7.27 10:00-11:30
地點：測繪館206會議室
報告人簡介
劉琳，香港中文大學理近20期六合彩結果
地球與環境科學課程副教授、地球與大氣科學研究生學部主任、太空與地球信息科學研究所研究員、能源與可持續發展研究所研究員。主要從事將地球物理、大地測量、深度學習等技術應用于冰凍圈變化研究。2021年獲AGU John Wahr青年科學家獎。
報告簡介
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.
