Glacial reconstruction and periglacial dynamics at the end of Late Pleistocene on the surface of Cofre de Perote volcano,México:a climatological retrospective  

作　　者：Victor SOTO Hugo DELGADO-GRANADOS Carlos M.WELSH Kenji YOSHIKAWA 

机构地区：[1]Centro de Ciencias de la Tierra,Universidad Veracruzana,Xalapa,Veracruz 91090,México [2]Instituto de Geofísica,Universidad Nacional Autónoma de México,Ciudad de México 04150,México [3]Water and Environmental Research Center,University of Alaska Fairbanks,Fairbanks,Alaska 99775,USA

出　　处：《Journal of Mountain Science》2023年第9期2453-2467,共15页山地科学学报（英文）

摘　　要：Despite being within the intertropical region of the planet,the Mexican territory still has glacier-covered mountains.In recent decades,important advances have been made in studies on glaciology and periglacial environment in Mexico both for current and past conditions.However,in spite of Cofre de Perote volcano(4200 m a.s.l.)being a strategically located mountain,it has not yet been studied in regards to the glacial and periglacial processes;in fact,those dynamics have modified the mountain massifs in the past.To complement the series of studies on glacial history in the high mountain environment of México,this study reconstructs the glacial cover and the periglacial environment of the volcano surface during the final stage of the Late Pleistocene based on climatic retrospective and through the identification of geomorphological features.The findings indicate the existence of a large glacier(ice cap)that covered the northern,western,and southern slopes of the mountain;while in the eastern sector there were two small glaciers,one being of cirque type,and the other of valley type.The current temperature conditions prevent the occurrence of permanent ice bodies;at the same time,it was found that the periglacial blockfields of the slopes is a legacy of the climatic conditions that prevailed at the end of Late Pleistocene.

关 键 词：Cofre de Perote Glacial cover Periglacial environment Climatic retrospective Palaeoclimatic modelling 

分 类 号：P343.6[天文地球—水文科学] P532[天文地球—地球物理学]