| Disastrous Abrupt Climate Events of Environment Change in Beijing in Recent 15,000 Years |
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| 作者姓名： | Zhang Jiahua |
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| 作者单位： | Institute of Remote Sensing Application，Chinese Academy of Sciences，Beijing |
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| 摘 要： | Atpresent,theworldclimaticandenvironmentalchangesfromregionstoglobalextentatvarioustimescaleswillallbeinfluencedbyphysical,chemicalandbiologicalinteraction,someofthesechangesarerecordedinmarine,terrestrial,glacialandbiologicalenvironment,thereby,recon-structtemporallyandspatiallysignificanteventspastenvironmentalandecologicalconditions.In198o'sglobalclimatechangehasbeenwidelypaidattentiontointernationalization,aseriesofresearchplansincludingIGBPhasbeensetupandPAGES,BHAC,GCTEareimportantc…
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Disastrous Abrupt Climate Events of Environment Change in Beijing in Recent 15,000 Years |
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| Zhang Jiahua.Disastrous Abrupt Climate Events of Environment Change in Beijing in Recent 15,000 Years[J].Natural Disaster Reduction in China,1997(1). |
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| Authors: | Zhang Jiahua |
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| Abstract: | In this paper, 197 samples were gathered from a 820 cm profile in Donganchi of Fangshan, Beijing. They provided a continuous record of vegetation and environmental change overca.15,000 aB. P.. By these records, it is concluded that in about 14, 100~14, 000 aB. P, the climate was cold and dry, which corresponds to Gothenburg Drift and interval between 10, 620 to10, 310 aB. P.. The rapid decline in pollen, charcoal concentrations and LOI implied a more cold-er climate and probably corresponded to Younger Dryas cooling event, at 5, 770 aB. P., 4, 650aB. P. and 2, 850 ~ 2, 650 aB. P., while the decline of forest cover showed three abrupt coldepisodes. |
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| Keywords: | paleo-environment climate event climate anomaly |
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