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简介：Thepaperdealswiththebackgroundfeatures,formationanddistributionofthechemicalel-ementsK,Na,Ca,Mg,Si,Fe,Mn,Cr,Ni,V,Co,Ti,Mo,Cu,Pb,Zn,As,Hg,Cd,Be,Li,Sr,B,F,Cl,BrandIinthegroundwaterintheregionofthemiddleandlowerreachesoftheYangtzeRiverandtheirrelationstothecompositionofthewater-bearingmedia,propertiesoftheoverly-ingrocksandsoils,redoxenvironment,andgroundwaterflowcondition,mineralizationandpHofgroundwater.

简介：ThisstudyexaminedtherainfallaroundthemiddleandlowerreachesoftheYangtzeRiverandrelatedatmosphericcirculationbyusingNCEPreanalysisdata.Thepurposeofthisstudyistoanalyzetheirdecadalvariationandtherelationshipamongrainfall,atmosphericcirculationaroundEastAsiaandtheENSOepisodes.Currentresultsarepresentedasfollows:(1)VeryclearincreasingtrendoftherainfallaroundthemiddleandlowreachesoftheYangtzeRiverduringtheMeiyuperiodandJunetoJulyisfoundintherecent15years.Meanwhile,thegeopotentialheightat500hPaaroundtheOkhotskSeaalsoholdssimilarincreasingtrend.ItisnoticeablethatENSOepisodestendtooccurmorefrequentlyintherecent15years.(2)AnindexdescribingEastAsiansummermonsooniswellcorrelatedwiththeSSTintheNino-3regioninprecedingautumnintherecent20yearsbutisnotpriortotheperiod.ThismeansthattheElNinophenomenonexertsmoreimpactsonEastAsiansummermonsoonrecently.(3)ThewarmphaseofPDOintherecent20yearsbasicallycoincideswiththeincreasingtrendoftheatmosphericcirculationinEastAsia.

简介：ＥＦＦＥＣＴＳＯＦＣＯＬＤＯＲＷＡＲＭＣＬＩＭＡＴＩＣＣＨＡＮＧＥＯＮＡＧＲＩＣＵＬＴＵＲＡＬＥＮＶＩＲＯＮＭＥＮＴＯＶＥＲＴＨＥＬＯＷＥＲＡＮＤＭＩＤＤＬＥＲＥＡＣＨＥＳＯＦＣＨＡＮＧＪＩＡＮＧＲＩＶＥＲＩＮＴＨＥＬＡＳＴＣＥＮＴＵＲＹＺｈａｎｓＹ...

简介：(1)SAM断然在Yangtze的中间、更低的活动范围与Mei-yu相关很好以便强壮的春季SAM被更多的降雨在河并且反过来也如此的ther各个在Mei-yu跟随。(2)SAM否定地与SST相关很好近海中国以便当时，强壮的春季SAM以后被近海的低SST和弱夏季风在东亚伴随高SST近海被强壮的夏季风在东亚跟随。(3)强壮的异常春天SAM的Inthe年，重要风切变在Yangtze的中间、更低的活动范围上统治空气的中间和底层；在弱异常春天SAM的年里，shear是到在诺思中国上的北方的更多。(4)怎么在Yangtze的中间、更低的活动范围上做SAM锁子甲Mei-yu降雨？为他们的关联的内部机制是什么？他们仍然保持不清楚并且需要推进学习。

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