Glacier geoengineering to address sea-level rise:A geotechnical approach  

作　　者：Andrew LOCKLEY Michael WOLOVICK Bowie KEEFER Rupert GLADSTONE Li-Yun ZHAO John C.MOORE 

机构地区：[1]University College London(Bartlett School),London,WC1H 0QB,UK [2]College of Global Change and Earth System Science,Beijing Normal University,Beijing,100875,PR China [3]Manastee Road,Galiano Island,British Columbia,BC V0N 1P0,Canada [4]Arctic Centre,University of Lapland,Rovaniemi,96101,Finland [5]Southern Marine Science and Engineering Guangdong Laboratory,Zhuhai,519082,China

出　　处：《Advances in Climate Change Research》2020年第4期401-414,共14页气候变化研究进展（英文版）

基　　金：supported by National Basic Research Program of China(2016YFA0602701);National Natural Science Foundation of China(41941006,41530748);National Key Research and Development Program of China(2018YFC1406104).

摘　　要：It is remarkable that the high-end sea level rise threat over the next few hundred years comes almost entirely from only a handful of ice streams and large glaciers.These occupy a few percent of ice sheets’coastline.Accordingly,spatially limited interventions at source may provide globally-equitable mitigation from rising seas.Ice streams control draining of ice sheets;glacier retreat or acceleration serves to greatly increase potential sea level rise.While various climatic geoengineering approaches have been considered,serious consideration of geotechnical approaches has been limited e particularly regarding glaciers.This study summarises novel and extant geotechnical techniques for glacier restraint,identifying candidates for further research.These include draining or freezing the bed;altering surface albedo;creating obstacles:retaining snow;stiffening shear margins with ice;blocking warm sea water entry;thickening ice shelves(increasing buttressing,and strengthening fractured shelves against disintegration);as well as using regional climate engineering or local cloud seeding to cool the glacier or add snow.Not all of these ideas are judged reasonable or feasible,and even fewer are likely to be found to be advisable after further consideration.By describing and evaluating the potential and risks of a large menu of responses e even apparently hopeless ones e we can increase the chances of finding one that works in times of need.

关 键 词：Climate intervention Targeted geoengineering ANTARCTICA GREENLAND Glaciers Sea level rise 

分 类 号：P343.6[天文地球—水文科学]