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The Cold and Warm Events from the Barrow,Arctic since the Little Ice Age

Pan Hongxi

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Abstract

For understanding the climatic and environmental changes in Barrow (71°20′N,156°40′W) area,Alaskan.9 lake cores with depth of 100～350 cm were taken by piston corer in this area. Based upon the analyses and measurements of ~(210)Pb,~(137)Cs,TOC,TN, organic materials,CaCO_3,grain size and pollen of core 98-4B,climatic and environmental records since the Little Ice Age at Barrow were reconstructed.In the past 400 years,three main warm periods occurred at 1540～1600 AD,1760～1730 AD and 1880～1992 AD,and three cold period at 1440～1520 AD,1610～1650 AD and 1750～1850 AD.The Barrow lake core record is compatible with three main cold-warm conditions since the Little Ice Age deduced from ice cores from Camp Century,Greenland and Guliya,Tibetan study although there exist differences in high frequent climatic changes among these areas.

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What this paper is about

For understanding the climatic and environmental changes in Barrow (71°20′N,156°40′W) area,Alaskan.9 lake cores with depth of 100～350 cm were taken by piston corer in this area. Based upon the analyses and measurements of ~(210)Pb,~(137)Cs,TOC,TN, organic materials,CaCO_3,grain size and pollen of core 98-4B,climatic and environmental records since the Little Ice Age at Barrow were reconstructed.In the past 400 years,three main warm periods occurred at 1540～1600 AD,1760～1730 AD and 1880～1992 AD,and three cold period at 1440～1520 AD,1610～1650 AD and 1750～1850 AD.The Barrow lake core record is compatible with three main cold-warm conditions since the Little Ice Age deduced from ice cores from Camp Century,Greenland and Guliya,Tibetan study although there exist differences in high frequent climatic changes among these areas.

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Available abstract

For understanding the climatic and environmental changes in Barrow (71°20′N,156°40′W) area,Alaskan.9 lake cores with depth of 100～350 cm were taken by piston corer in this area. Based upon the analyses and measurements of ~(210)Pb,~(137)Cs,TOC,TN, organic materials,CaCO_3,grain size and pollen of core 98-4B,climatic and environmental records since the Little Ice Age at Barrow were reconstructed.In the past 400 years,three main warm periods occurred at 1540～1600 AD,1760～1730 AD and 1880～1992 AD,and three cold period at 1440～1520 AD,1610～1650 AD and 1750～1850 AD.The Barrow lake core record is compatible with three main cold-warm conditions since the Little Ice Age deduced from ice cores from Camp Century,Greenland and Guliya,Tibetan study although there exist differences in high frequent climatic changes among these areas.

Key concepts: Ice core, Little ice age, Physical geography, Arctic, Period (music), Geology, Ice age, Climatology

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