Wind blows sandstorm back to northern regions

　　 Black-headedgullsarefedataparkinYinchuan,NingxiaHuiautonomousregion,/XINHUADuetoshiftingwindandweatherconditions,amassivesandandduststormwillbeblownbacktonorthernChinaandhitcentral,northernandnorthwesternpartsofthecountry,,whichhadshroudedBeijinginthickbrowndustonMonday,movedawayfromthecapitalonTuesdaybutcontinuedtosweepthroughmanyareas,includingtheXinjiangUygur,InnerMongoliaandNingxiaHuiautonomousregions,aswellastheprovincesofQinghai,Gansu,Shaanxi,Shanxi,Hebei,Shandong,,accordingtothecenter,whichremindedpeopleinaffectedareastobepreparedandclosewindowsanddoors."Peopleareadvisedtowearmasksandotherprotectivegeartopreventpossibledamagetotheireyesandrespiratorytract,",thesandstormfromneighboringMongoliahit12provincialregionsinnorthernChinaandresult,,theNationalMeteorologicalCenterrenewedasandstormalertfornorthern,,thelevelofPM10－particulatematterof10micronsorsmaller－inBeijinghadreached8,108microgramspercubicmeter,,thea,citingachangeinwindandweatherconditions,saidonWednesdaymorningthatthesandstorm,mountainousareasinBeijingweretohaverain,withrainfallexpandingtourbanareasofthecapitallateonFriday,,saidZhouBing,chiefexpertattheChinaMeteorologicalAdministration,daysofprecipitationinMongoliaandmanyregionsofNorthChinawereonlyhalfofwhattheywereduringthesameperiodlastyear,whichincreasedthepossibilityofsandstorms,hesaid."TheheavysandstormthistimewasalsoinfluencedbystrongwindsfromSiberia,InnerMongoliaandtheMongolianPlateau,aswellasrisingtemperatures,whichmakesthesandmoreexposedandpronetobeingcarriedbythewind,",theregionhadsandandduststormsabout10timesannuallyinthepastdecade,ountry,,ndylandundercontrolthroughimprovingvegetation,AdministrationindicatesthatChinassandyanddesertareashaveeachbeenreducedbyabout2,,anditsresultsareexpectedtobepublishedbytheendoftheyear,saidSunTao,directoroftheadministration。