简介:Abetterunderstandingofthelong-termglobalcarboncyclerequiredestimateofthechangesinterrestrialcarbonstorageafterthelastglacialperiod.Theresultsofsimulationatmid-Holocene(MH)fromPMIP(PaleoclimateModelingIntercomparisonProject)andthemoderndatafromCRU(ClimateResearchUnit,EastAngliaUniversity,UK)allowustousetheAtmosphere-VegetationInteractionModel(AVIM)tosimulatetheChineseterrestrialnetprimaryproductivity(NPP)at6kaBPandpresenttime.ThechangeofNPPandtotalNPPinChinafromnowtomid-Holoceneareabout54gm-2yr-1and0.63Pgyr-1,respectively,mainlyduetothebuild-upoftemperateforestandtropicalrainforest.ChineseterrestrialNPPvariationfromMHtonowiscloselyrelatedtothevariationinintensityofAsianmonsoon,whichcontrolledtheclimate-vegetationpatternchange.
简介:1984年9月至12月,河北省文物研究所燕下都工作站为配合高陌乡东沈村农民用土而对“6”号遗址进行了局部的发掘。“6”号遗址位于燕下都城内南部的东沈村东、中易水北岸,是一处商周时期的生活居住遗址。在发掘的约3百平方米的范围内,出土了一批遗迹遗物,其中还出土了七座汉墓。现将七座汉墓的情况简报如下:一、墓葬形制七座汉墓(编号M1—M7)皆土坑竖穴墓,方向在0°到10°之间。墓中填土成五花状,部分夯打。葬具为木质,皆腐烂。从朽木痕迹看,M1、M4和M7为单棺墓,余为一棺一橔墓。椁木紧贴土坑四壁,棺放置在椁中部或偏南,唯M2棺下有两条横放的垫木。七