简介:Aregionalclimatemodelisemployedtosimulatetheaerosols(dust,sulfate,blackcarbon,andorganiccarbon)andtheirdirecteffectontheclimateoverChina.Theemphasisisonthedirectradiativeforcingduetothechangeinmixingstateofaerosols.Theresultsshowthatdirectradiativeforcingissignificantlydifferentbetweenexternallyandinternallymixedaerosols.Atthetopoftheatmosphere(TOA),theradiativeforcingofexternallymixedaerosolsislargerthanthatofinternallymixedones,especiallyintheTarimdesertregionwherethedifferenceisabout0.7Wm2.Atthesurface,however,thesituationbecomesopposite,especiallyintheSichuanbasinwherethedifferenceisabout-1.4Wm2.Nonetheless,eitherexternallyorinternallymixedaerosolsinChinacanresultinasignificantcoolingeffect,exceptforthewarminginSouthChinainwinterandtheslightwarminginNorthChinainFebruary.Thecoolingeffectinducedbyexternallymixedaerosolsisweakerthanthatinducedbyinternallymixedaerosols,andthisismoreobviousinspringandwinterthaninsummerandautumn.Inspringandsummer,theinhibitingeffectofexternallymixedaerosolsonprecipitationislessthanthatofinternallymixedaerosols,whereasinautumnandwinterthedifferenceisnotobvious.
简介:Y101井区沙四段沉积时期处于混合、动荡沉积环境,造成砂体薄互层多,连续性差,具有厚度薄、横向非均质性强和受火成岩反射干扰的特点,造成该区储层识别难度大,制约了该区的勘探进程.为此,从制约储层预测精度的几个因素(地震因素、地质因素、技术方法、主观认识等)入手,逐一分析,最后确定造成研究区储层预测精度低的主原因为地震资料品质差和预测方法不当.通过分频技术处理,提高地震资料的纵向分辨率,并结合测井曲线进行小波变换,建立了该区高分辨率层序地层格架,再通过提取多类属性,优选敏感属性进行多属性融合,完成了该区储层预测,最终将储层预测精度从65%提高至85%,达到了目前精细勘探的需求.
简介:在Quanji山岳的变形早Paleoproterozoicgranitoids,西北的中国为在TarimCraton和诺思中国Craton之间的关系提供限制。在granitoids底盘之中,Mohe石英闪长岩的岩石典型地显示出adakiticgeochemical特征,与中等K2O/Na2O比率(0.561.17)和高Sr(519619ppm)低Y(9.3720.40ppm)和Yb(0.971.77ppm)集中。岩石有在+2.4和+4.4和2.432.59Ga的弄空的披风Nd模型年龄之间的Nd(t)价值。magmatic锆石有积极Hf(t)价值从+0.40到+7.60和2.432.70Ga的弄空的披风Hf模型年龄,与在2.54和2.65Ga的主要山峰。geochemical和Nd-Hf同位素的特征显示Mohequartz-dioritic岩石可能被高压的变形少年的部分融化形成在在早Paleoproterozoic的post-orogenicextensional政体的外壳的岩石。它建议重要外壳的生长在2.4和2.52.7Ga发生在Quanji山岳和TarimCraton。Quanji山岳和TarimCraton可能在Neoarchean与北方中国Craton分享类似的外壳的进化历史。