https://repository.kopri.re.kr/handle/201206/5107 2026-04-22T12:31:00Z https://repository.kopri.re.kr/handle/201206/6309 Title: Seasonal variations in the sources of natural and anthropogenic leaddeposited at the East Rongbuk Glacier in the high-altitude Himalayas Authors: Lee, Khanghyun; Kevin Rosman; Robert Loss; Ross Edwards; Andrew Moy; Shugui Hou; Graeme Burton; Sungmin Hong; Paul Vallelonga; Laurie Burn-Nune Abstract: Lead (Pb) isotopic compositions and concentrations, and barium(Ba) and indium(In) concentrations have been analysed at sub-annual resolution in three sections froma b110mice core dated to the 18th and 20th centuries, as well as snow pit samples dated to 2004/2005, recovered from the East Rongbuk Glacier in the high-altitude Himalayas. Ice core sections indicate that atmospheric chemistry prior to ~1953 was controlled by mineral dust inputs, with no discernible volcanic or anthropogenic contributions. Eighteenth century monsoon ice core chemistry is indicative of dominant contributions from local Himalayan sources;non-monsoon ice core chemistry is linked to contributions fromlocal (Himalayan), regional (Indian/Thar Desert) and long-range (North Africa, Central Asia) sources. Twentieth century monsoon and non-monsoon ice core data demonstrate similar seasonal sources of mineral dust, however with a transition to less-radiogenic isotopic signatures that suggests local and regional climate/environmental change. The snow pit record demonstrates natural and anthropogenic contributions during both seasons,with increased anthropogenic influence during non-monsoon times.Monsoon anthropogenic inputs are most likely sourced to South/South-East Asia and/or India, whereas non-monsoon anthropogenic inputs are most likely sourced to India and Central Asia. 2014-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/6308 Title: Isotopic signatures for natural versus anthropogenic Pb in high-altitude Mt. Everest ice cores during the past 800 years Authors: Lee, Khanghyun; Hong, Sung-Min; L.J. Burn-Nunes; K.J.R. Rosman; C.Boutron; C.Barbante; S.Hou; Hur, Soon Do Abstract: A long-term record, extending back 800 years (1205 to 2002 AD), of the Pb isotopic composition (206Pb/207Pb and 208Pb/207Pb) as well as Pb concentrations from high altitude Mt. Everest ice cores has the potential to identify sources and source regions affecting natural and anthropogenic Pb deposition in central Asia. The results show that the regional natural background Pb isotope signature (~1.20 for 206Pb/207Pb and ~2.50 for 208Pb/207Pb) in the central Himalayas was dominated by mineral dust over the last ~750 years from 1205 to 1960s,mostly originating from local sources with occasional contributions of long-range transported dust probably from Sahara desert and northwestern India. source regions affecting natural and anthropogenic Pb deposition in central Asia. The results show that the regional natural background Pb isotope signature (~1.20 for 206Pb/207Pb and ~2.50 for 208Pb/207Pb) in the central Himalayas was dominated by mineral dust over the last ~750 years from 1205 to 1960s,mostly originating from local sources with occasional contributions of long-range transported dust probably from Sahara desert and northwestern India. 2011-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/6348 Title: High-resolution trace element records of an ice core from the eastern Tien Shan, central Asia, since 1953 AD Authors: Y.Liu; Lee, Khanghyun; Hur, Soon Do; Y.Wang; Hong, Sung-Min; S.Hou Abstract: High­resolution records of trace elements (Ba, V, Cr, Mn, Co, Ni, Cu, As, Rb, Sr, Mo, Cd, Sn, Sb, Tl, Pb, Bi, Th, and U) quantified in an ice core recovered from the Miaoergou glacier in the eastern Tien Shan, central Asia, spanning the period 1953？2004 AD, provide the first comprehensive time series on characterizing the relative contributions from natural and anthropogenic sources to the deposition of trace elements in central Asia. the period 1953？2004 AD, provide the first comprehensive time series on characterizing the relative contributions from natural and anthropogenic sources to the deposition of trace elements in central Asia. 2011-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/6206 Title: Atmospheric pollution indicated by trace elements in snow from the northern slope of Cho Oyu range, Himalayas Authors: Y.Wang; Hur, Soon Do; S.Hou; Lee, Khanghyun; Hong, Sung-Min; Y.Liu Abstract: Samples collected from a 0.87 m snow pit at a high altitude site in the Cho Oyu range, Himalayas were measured for V, Cr, Mn, Co, Ni, Cu, Zn, As, Rb, Sr, Cd, Sn, Sb, Ba, Tl, Pb, Bi, Th, and U using inductively coupled plasma mass spectrometry. In addition, major ions, oxygen stable isotopes, and microparticles were also measured to assist the interpretation of seasonal variation of trace elements.ometry. In addition, major ions, oxygen stable isotopes, and microparticles were also measured to assist the interpretation of seasonal variation of trace elements. 2011-01-01T00:00:00Z