The Westerlies is important in linking the Northem high latitude, North Atlantic and East Asian monsoon. The location and intensity of the Westerly jet can not only control the climate of central Asia （including nort...The Westerlies is important in linking the Northem high latitude, North Atlantic and East Asian monsoon. The location and intensity of the Westerly jet can not only control the climate of central Asia （including northwest arid China）, but also significantly influence the climate of the East Asian monsoon region. However, it remains unclear of the variability of the Westerlies in Asia on multiple timeseales and their global linkage.展开更多
Characterization of transport pathways and depositional changes in Mercury(Hg)and their connection to climatic and environmental changes on various time scales are crucial for better understanding the anthropogenic im...Characterization of transport pathways and depositional changes in Mercury(Hg)and their connection to climatic and environmental changes on various time scales are crucial for better understanding the anthropogenic impacts on the global Hg cycle in the Anthropocene epoch.In this study,we examined Hg variations recorded in a stalagmite from central China,covering the period from 25.5 to 10.9 thousand years ago.Our data show a marked increase in Hg concentrations during the late Last Glacial Maximum,which coincided with the period of highest dust deposition on the Chinese Loess Plateau.Hg concentrations were lower during Heinrich events 1 and 2 and the Younger Dryas but higher during the BùllingAllerùd and the early Holocene.We suggest that regional dust load,which enhances atmospheric dry deposition of Hg,is the primary factor influencing Hg deposition in central China on glacialinterglacial timescales.On millennial-to-centennial timescales,climate also plays a significant role.Warmer and wetter conditions increase vegetation,litterfall,and soil/rock weathering,which in turn boost mineral dissolution and soil erosion in the vadose zone.These processes collectively result in higher Hg concentrations in the stalagmite.展开更多
基金supported by the National Natural Science Foundation of China(grants No.41290254 and 41372192)the State Key Laboratory of Loess and Quaternary Geology,and Chinese Academy of Science(International partnership Program,grant No.132B61KYS20160002)
文摘The Westerlies is important in linking the Northem high latitude, North Atlantic and East Asian monsoon. The location and intensity of the Westerly jet can not only control the climate of central Asia （including northwest arid China）, but also significantly influence the climate of the East Asian monsoon region. However, it remains unclear of the variability of the Westerlies in Asia on multiple timeseales and their global linkage.
基金supported by the National Natural Science Foundation of China(42325705 and 42230208)the Chinese Academy of Sciences(xbzg-zdsys-202217)。
文摘Characterization of transport pathways and depositional changes in Mercury(Hg)and their connection to climatic and environmental changes on various time scales are crucial for better understanding the anthropogenic impacts on the global Hg cycle in the Anthropocene epoch.In this study,we examined Hg variations recorded in a stalagmite from central China,covering the period from 25.5 to 10.9 thousand years ago.Our data show a marked increase in Hg concentrations during the late Last Glacial Maximum,which coincided with the period of highest dust deposition on the Chinese Loess Plateau.Hg concentrations were lower during Heinrich events 1 and 2 and the Younger Dryas but higher during the BùllingAllerùd and the early Holocene.We suggest that regional dust load,which enhances atmospheric dry deposition of Hg,is the primary factor influencing Hg deposition in central China on glacialinterglacial timescales.On millennial-to-centennial timescales,climate also plays a significant role.Warmer and wetter conditions increase vegetation,litterfall,and soil/rock weathering,which in turn boost mineral dissolution and soil erosion in the vadose zone.These processes collectively result in higher Hg concentrations in the stalagmite.
