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學習快評丨qibao666888　　中??(zhong)新??(xin)社??(she)北??(bei)京??(jing)3月??(yue)23日??(ri)電??(dian) (記??(ji)者??(zhe) 阮??(ruan)煜??(yu)琳??(lin))23日??(ri)??，北??(bei)京??(jing)、呼??(hu)和??(he)浩??(hao)特??(te)等??(deng)多??(duo)個??(ge)中??(zhong)國?(guo)北??(bei)方??(fang)城??(cheng)市??(shi)出??(chu)現(xiàn)??(xian)沙??(sha)塵??(chen)污??(wu)染??(ran)??。??　　專??(zhuan)家??(jia)分??(fen)析??(xi)??，近??(jin)期?(qi)沙??(sha)塵??(chen)天?(tian)氣??(qi)比??(bi)較?(jiao)頻??(pin)繁??(fan)有??(you)兩??(liang)方??(fang)面??(mian)原??(yuan)因??(yin)??。??一??(yi)是??(shi)蒙??(meng)古?(gu)國??(guo)和??(he)中??(zhong)國??(guo)北??(bei)方??(fang)地??(di)區(qū)??(qu)氣??(qi)溫??(wen)偏?(pian)高??(gao)??，導??(dao)致??(zhi)地??(di)表??(biao)積?(ji)雪??(xue)覆??(fu)蓋?(gai)范??(fan)圍?(wei)縮??(suo)小??(xiao)、含?(han)水??(shui)率??(lv)下??(xia)降?(jiang)??，這??(zhe)是??(shi)有??(you)利??(li)于??(yu)沙??(sha)塵??(chen)發(fā)??(fa)生??(sheng)的??(de)熱??(re)力??(li)因??(yin)素??(su)??。二??(er)是??(shi)近??(jin)期?(qi)冷??(leng)空??(kong)氣??(qi)活??(huo)動??(dong)頻??(pin)繁??(fan)??，22日??(ri)北??(bei)方??(fang)地??(di)區(qū)??(qu)風??(feng)力?(li)明?(ming)顯??(xian)增??(zeng)強??(qiang)??，內(nèi)??(nei)蒙??(meng)古??(gu)普??(pu)遍??(bian)達?(da)到??(dao)6級??(ji)及??(ji)以??(yi)上??(shang)??，局??(ju)地??(di)超??(chao)過??(guo)8級??(ji)??，這??(zhe)是??(shi)誘??(you)發(fā)??(fa)沙?(sha)源??(yuan)地??(di)起??(qi)沙??(sha)的??(de)動??(dong)力??(li)因??(yin)素??(su)??。。