210-year ice core records of dust storms, volcanic eruptions and acidification at Site-J, Greenland (scientific note)

元データ 国立極地研究所

概要

210-year records of dust concentration, electrical conductivity, acidity (pH), non-sea salt sulfate (nss sulfate) and nitrate concentrations were obtained for an ice core from Site-J, Greenland. The ice core was well dated by counting annual cycles of the δ^<18>O profile and by tuning with time markers established for tritium peaks and the Laki 1783 eruption signal. Dust records in both ice cores from Site-J and Crete suggest that dust storms occurred in 1818,1900,1919,1936 and 1943 over Greenland. Electrical conductivity shows remarkable peaks probably due to volcanic eruptions with VEI larger than 4. The anthropogenic effect on precipitation chemistry started in ca. 1860,40 years earlier than the time previously reported. Nss sulfate increased remarkably, much more than nitrate, because of the rapid increase in solid fossil fuel combustion, but by the early 1970's, the nitrate concentration exceeded the nss sulfate concentration due to the intense increase in liquid fossil fuel combustion since the 1950's. The decrease in sulfate and nitrate concentrations started in the early 1970's. This is attributed to the spread of suppression facilities for anthropogenic pollutants emitted by the combustion of solid and liquid fossil fuels.

著者

西尾 文彦 千葉大学環境リモートセンシング研究センター
Watanabe Okitsugu National Institute of Polar Research, Research Organization of Information and Systems
Fujii Yoshiyuki National Institute of Polar Research, Research Organization of Information and Systems
Kamiyama Kokichi National Institute of Polar Research, Research Organization of Information and Systems
Narita Hideki Institute of Low Temperature Science Pan-Okhotsk Research Center, Hokkaido University
Kawada Kunio Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
Kawamura Kenji Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
Shoji Hitoshi Kitami Institute of Technology
Kameda Takao Kitami Institute of Technology
亀田 貴雄 北見工大
Watanabe O National Institute Of Polar Research Research Organization Of Information And Systems
Watanabe Okitsugu National Institute Of Polar Research
Kamiyama K National Institute Of Polar Research Research Organization Of Information And Systems
Kamiyama Kokichi National Institute Of Polar Research
Nishio Fumihiko Center for Environmental Remote Sensing, Chiba University
Narita Hideki Institute Of Low Temperature Science Pan-okhotsk Research Center Hokkaido University
Kameda T Kitami Inst. Technol. Hokkaido Jpn
Nishio F Hokkaido University Of Education Kushiro Branch
Kawamura K Center For Atmospheric And Oceanic Studies Tohoku University
Kawada K Toyama Univ. Toyama
Narita Hideki Institute Of Low Temperature Science Hokkaido University
Fujii Yoshiyuki National Institute Of Polar Research
Watanabe Okitsusgu National Institute of Polar Research
Kawada Kunio Department Earth Science Toyama University
Nishio Fumihiko Center For Environmental Remote Sensing Chiba University
西尾 文彦 Hokkaido University Of Education Kushiro Branch
Kamiyama Kokichi National Institute Of Polar Research Research Organization Of Information And Systems
Watanabe Okitsugu National Institute Of Polar Research Research Organization Of Information And Systems
Kameda Takao Institute Of Low Temperature Science Hokkaido University
Kawamura Toshiyuki Department Of Applied Physics Faculty Of Engineering Hokkaido University:(present Address)institute
Kameda T Department Of Civil Engineering Kitami Institute Of Technology
西尾 文彦[他] 北海道教育大学釧路校

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