多年冻土区热喀斯特湖水—热—碳循环过程研究进展  

Advances in the Study of Water,Heat,and Carbon Cycling Dynamics in Thermokarst Lakes of Permafrost

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作  者:陈梦佳 白炜[1,3] 张成铭 刘文艳 高泽永 CHEN Mengjia;BAI Wei;ZHANG Chengming;LIU Wenyan;GAO Zeyong(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;State Key Laboratory of Cryospheric Science and Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;Ministry of Education Engineering Research Center of Water Resource Comprehensive Utilization in Cold and Arid Regions,Lanzhou 730070,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区:[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]中国科学院西北生态环境资源研究院冰冻圈科学与冻土工程全国重点实验室,甘肃兰州730000 [3]寒旱地区水资源综合利用教育部工程研究中心,甘肃兰州730070 [4]中国科学院大学,北京100049

出  处:《地球科学进展》2025年第1期82-98,共17页Advances in Earth Science

基  金:甘肃省杰出青年基金项目(编号:25JRRA489);甘肃省教育厅高校科研创新平台重大培育项目(编号:2024CXPT-14)资助.

摘  要:热喀斯特湖作为多年冻土响应气候变暖最显著的冰冻圈地貌之一,其形成演化过程深刻影响着生态环境变化、区域水文循环及生物地球化学过程,并危害冻土工程稳定性。通过综述北半球多年冻土区热喀斯特湖形成演化、水文循环、热量迁移及生态环境效应和工程影响的研究进展,发现在环北极不连续多年冻土区,多数区域的湖塘面积呈减少趋势;在连续多年冻土区,湖塘面积的增加和减少均有发生,而青藏高原区域气候暖湿化导致热喀斯特湖快速形成和扩张。同时,热喀斯特湖演化耦合水文循环过程及产生的热效应会改变周围土壤理化性质,影响高寒生态系统的水热过程,并降低毗邻冻土工程的稳定性。热喀斯特湖发育加速多年冻土碳库分解,释放CO_(2)、CH_(4)和N_(2)O等温室气体,并反馈于气候变化系统。目前,热喀斯特湖“水—热—碳”循环过程及环境效应是国际冻土研究的热点议题之一。未来需综合考虑人类活动及气候变化的协同作用,并基于热喀斯特湖水—热—碳循环耦合过程,发展高精度陆面过程模型,研究变化环境下多年冻土区生态环境演替、水资源变化及碳循环等问题,推动冰冻圈科学发展。As one of the most significant cryospheric landforms that respond to climate warming in permafrost regions,thermokarst lakes profoundly influence ecological changes,regional hydrological cycles,and biogeochemical processes while compromising the stability of permafrost engineering.This study reviews recent advances in the formation and evolution of thermokarst lakes,their hydrological cycles,heat transfer,ecological and environmental effects,and engineering impacts across northern hemisphere permafrost regions.Research indicates that in the discontinuous permafrost zones of the Arctic,lake and pond areas show a predominantly decreasing trend,whereas,in continuous permafrost zones,both expansion and shrinkage are observed.On the Qinghai-Tibet Plateau,climate warming and increased precipitation have led to the rapid formation and expansion of thermokarst lakes.The evolution of these lakes,coupled with hydrological cycling and thermal effects,alters the physicochemical properties of the surrounding soils,influences hydrothermal dynamics in alpine ecosystems,and reduces the stability of adjacent permafrost engineering structures.Furthermore,the development of thermokarst lakes accelerates the decomposition of permafrost carbon stocks,releasing greenhouse gases such as CO_(2),CH_(4),and N_(2)O,which further feedback into the climate system.Currently,coupled water-heat-carbon cycling processes and their environmental implications represent a key research focus in permafrost science.Future studies should comprehensively consider the interactive effects of climate change and human activities and,based on coupled water-heat-carbon cycling processes,develop high-precision land surface process models to investigate ecological succession,water resource dynamics,and carbon cycling in permafrost regions under changing environmental conditions,thereby advancing cryospheric science.

关 键 词:北半球 热喀斯特湖 多年冻土 碳循环 气候变化 

分 类 号:P642.14[天文地球—工程地质学]

 

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