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　　北??(bei)京??(jing)市??(shi)生??(sheng)態(tài)??(tai)環(huán)??(huan)境??(jing)監(jiān)??(jian)測(cè)??(ce)中?(zhong)心??(xin)介??(jie)紹??(shao)??，受??(shou)強(qiáng)??(qiang)低??(di)壓??(ya)氣??(qi)旋?(xuan)系?(xi)統(tǒng)??(tong)影??(ying)響??(xiang)??，23日??(ri)白??(bai)天??(tian)??，我??(wo)國(guó)??(guo)西??(xi)北??(bei)地??(di)區(qū)??(qu)出??(chu)現(xiàn)??(xian)大??(da)范??(fan)圍??(wei)沙??(sha)塵??(chen)天??(tian)氣??(qi)??，上??(shang)午??(wu)內(nèi)??(nei)蒙??(meng)古??(gu)中?(zhong)部??(bu)地??(di)區(qū)??(qu)部??(bu)分??(fen)城??(cheng)市??(shi)PM10小??(xiao)時(shí)??(shi)濃??(nong)度??(du)達(dá)??(da)到??(dao)500微??(wei)克??(ke)/立??(li)方??(fang)米??(mi)左??(zuo)右??(you)??，為??(wei)嚴(yán)??(yan)重??(zhong)污??(wu)染??(ran)水??(shui)平??(ping)；山?(shan)西??(xi)河??(he)北??(bei)北??(bei)部??(bu)PM10小??(xiao)時(shí)??(shi)濃??(nong)度??(du)處??(chu)于??(yu)3級(jí)??(ji)輕??(qing)度??(du)污??(wu)染??(ran)水??(shui)平??(ping)??。??受??(shou)外??(wai)來??(lai)沙??(sha)塵??(chen)傳??(chuan)輸??(shu)影??(ying)響??(xiang)??，北??(bei)京??(jing)PM10濃??(nong)度??(du)持?(chi)續(xù)??(xu)上??(shang)升??(sheng)??，10時(shí)??(shi)PM10濃??(nong)度??(du)達(dá)??(da)到??(dao)152微??(wei)克??(ke)/立??(li)方??(fang)米??(mi)??，為??(wei)3級(jí)??(ji)輕??(qing)度??(du)污??(wu)染??(ran)水?(shui)平??(ping)???！　”??(bei)京??(jing)市?(shi)生??(sheng)態(tài)??(tai)環(huán)??(huan)境??(jing)監(jiān)??(jian)測(cè)??(ce)中??(zhong)心??(xin)介??(jie)紹??(shao)??，受??(shou)強(qiáng)??(qiang)低??(di)壓??(ya)氣??(qi)旋??(xuan)系??(xi)統(tǒng)??(tong)影??(ying)響??(xiang)??，23日??(ri)白??(bai)天??(tian)??，我??(wo)國(guó)??(guo)西??(xi)北??(bei)地??(di)區(qū)??(qu)出??(chu)現(xiàn)??(xian)大??(da)范??(fan)圍??(wei)沙??(sha)塵??(chen)天??(tian)氣??(qi)??，上??(shang)午??(wu)內(nèi)??(nei)蒙??(meng)古??(gu)中??(zhong)部??(bu)地?(di)區(qū)??(qu)部??(bu)分??(fen)城??(cheng)市??(shi)PM10小??(xiao)時(shí)??(shi)濃??(nong)度??(du)達(dá)??(da)到?(dao)500微??(wei)克??(ke)/立??(li)方??(fang)米??(mi)左??(zuo)右??(you)??，為??(wei)嚴(yán)??(yan)重??(zhong)污??(wu)染??(ran)水??(shui)平??(ping)；山??(shan)西??(xi)河??(he)北?(bei)北??(bei)部??(bu)PM10小??(xiao)時(shí)??(shi)濃??(nong)度??(du)處??(chu)于祝(yu)3級(jí)??(ji)輕??(qing)度??(du)污?(wu)染??(ran)水??(shui)平秘(ping)??。??受??(shou)外??(wai)來??(lai)沙??(sha)塵??(chen)傳??(chuan)輸??(shu)影??(ying)響??(xiang)??，北??(bei)京??(jing)PM10濃??(nong)度??(du)持??(chi)續(xù)??(xu)上??(shang)升??(sheng)??，10時(shí)??(shi)PM10濃??(nong)度??(du)達(dá)??(da)到??(dao)152微??(wei)克??(ke)/立??(li)方??(fang)米??(mi)??，為??(wei)3級(jí)??(ji)輕??(qing)度??(du)污?(wu)染??(ran)水??(shui)平??(ping)??。。