Mercury records from natural archives reveal ecosystem responses to changing atmospheric deposition  

作　　者：Qinqin Chen Qingru Wu Yuying Cui Shuxiao Wang 

机构地区：[1]School of Environment,Tsinghua University,Beijing 100084,China [2]State Key Joint Laboratory of Environmental Simulation and Pollution Control,Beijing 100084,China [3]State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex,Beijing 100084,China

出　　处：《National Science Review》2024年第12期207-219,共13页国家科学评论(英文版)

基　　金：funded by the National Natural Science Foundation of China(22222604,42394094 and 42407138);the International Postdoctoral Exchange Fellowship Program(Talent Introduction Program)(YJ20210103);the Shuimu Scholar Fellowship from Tsinghua University(2020SM075);the Special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control(22L02ESPC).

摘　　要：Global ecosystems face mercury contamination,yet long-term data are scarce,hindering understanding of ecosystem responses to atmospheric Hg input changes.To bridge the data gap and assess ecosystem responses,we compiled and compared a mercury accumulation database from peat,lake,ice and marine deposits worldwide with atmospheric mercury deposition modelled by GEOS-Chem,focusing on trends,magnitudes,spatial-temporal distributions and impact factors.The mercury fluxes in all four deposits showed a 5-to 9-fold increase over 1700-2012,with lake and peat mercury fluxes that generally mirrored atmospheric deposition trends.Significant decreases in lake and peat mercury fluxes post-1950 in Europe evidenced effective environmental policies,whereas rises in East Asia,Africa and Oceania highlighted coal-use impacts,inter alia.Conversely,mercury fluxes in marine and high-altitude ecosystems did not align well with atmospheric deposition,emphasizing natural influences over anthropogenic impacts.Our study underscores the importance of these key regions and ecosystems for future mercury management.

关 键 词：mercury pollution natural archive GEOS-CHEM ecosystem recovery policy evaluation 

分 类 号：X51[环境科学与工程—环境工程] X171.1