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學(xué)習(xí)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(dǎo)??(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(fēng)?(feng)力??(li)明??(ming)顯??(xian)增??(zeng)強(qiáng)??(qiang)??，內(nèi)?(nei)蒙??(meng)古??(gu)普??(pu)遍??(bian)達(dá)??(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)??。。