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Climate-related variations in atmospheric selenium as recorded in Greenland ice core during the past 30,000 years

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Title
Climate-related variations in atmospheric selenium as recorded in Greenland ice core during the past 30,000 years
Other Titles
그린란드 빙하코어에 기록된 지난 3만년 동안의 기후변화와 대기 셀레늄 변화
Authors
Lee, Khanghyun
Hong, Sungmin
Hur, Soon Do
Han, Yeongcheol
Moon, Jangil
Seong Jun Joon
Han, Changhee
Keywords
Atmospheric SeleniumGlacial-interglacial changeGreenland ice coreNatural source
Issue Date
2015
Citation
Lee, Khanghyun, et al. 2015. Climate-related variations in atmospheric selenium as recorded in Greenland ice core during the past 30,000 years. 한국환경분석학회 2015 추계학술대회 및 심포지움. 제주오션스위츠호텔. 2015.11.05~2015.11.06.
Abstract
Selenium (Se) is an essential element for human and animal heath and plant growth. Atmospheric Se is well known to play an important role in global biogeochemical cycle of Se. Recently, it was reported that Se in Greenland snow samples originated mainly from coal combustion in Asian countries. However, the natural biogeochemical cycle of atmospheric Se is required to understand to what extent human activities have perturbed the atmospheric Se cycle. In this research, we present the first record of past natural change in the occurrence of Se in Greenland ice core covering the past 30,000 years. Se was directly measured by ICP-SF-MS. Out data show a strong variability in concentrations with lower values during the Last Glacial Maximum (LGM) and much higher values during warm Holocene period. This pattern is opposite to any known climatic variations in dust-derived trace elements in polar regions, indicating that there exists different natural sources other than crustal dust for atmospheric Se. The variations in Se concentrations during the last 100 years is shown to be similar to those in chlorophyll concentrations in the North Atlantic. This indicates that an important natural source of atmospheric Se could be marine biogenic activities.
URI
https://repository.kopri.re.kr/handle/201206/8177
Conference Name
한국환경분석학회 2015 추계학술대회 및 심포지움
Conference Place
제주오션스위츠호텔
Conference Date
2015.11.05~2015.11.06
Type
Proceeding
Indexed
세미나-학술발표
Appears in Collections  
2014-2016, Investigation of Climate Change Mechanism by Observation and Simulation of Polar Climate for The Past and Present (14-16) / Kim, Seong-Joong (PE14010; PE15010; PE16010)
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