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學習快評丨qibao666888　　根?(gen)據(jù)?(ju)《氣??(qi)候??(hou)季??(ji)節(jié)??(jie)劃??(hua)分??(fen)》國??(guo)家??(jia)標??(biao)準??(zhun)：當??(dang)年??(nian)5天??(tian)滑??(hua)動??(dong)平??(ping)均??(jun)氣??(qi)溫??(wen)序??(xu)列??(lie)中?(zhong)?，首??(shou)次??(ci)連??(lian)續(xù)??(xu)5個??(ge)滿??(man)足??(zu)≥10℃的??(de)滑??(hua)動??(dong)平??(ping)均??(jun)值??(zhi)所?(suo)對?(dui)應(yīng)??(ying)的?(de)日??(ri)平??(ping)均??(jun)氣??(qi)溫??(wen)序??(xu)列??(lie)(9天??(tian))中??(zhong)?，第??(di)一??(yi)個??(ge)≥10℃的??(de)日??(ri)期??(qi)作??(zuo)為??(wei)春??(chun)季??(ji)起??(qi)始??(shi)日??(ri)??。??結(jié)?(jie)合??(he)前??(qian)期??(qi)實??(shi)況??(kuang)?，北??(bei)京??(jing)自??(zi)3月??(yue)21日??(ri)起??(qi)滑??(hua)動??(dong)平??(ping)均??(jun)氣??(qi)溫??(wen)序??(xu)列??(lie)開??(kai)始?(shi)≥10℃?，并??(bing)于??(yu)3月??(yue)25日??(ri)達??(da)到??(dao)連??(lian)續(xù)??(xu)5天??(tian)≥10℃?，其??(qi)所??(suo)對?(dui)應(yīng)??(ying)的??(de)氣??(qi)溫??(wen)序??(xu)列??(lie)中??(zhong)第??(di)一??(yi)個??(ge)≥10℃的??(de)日??(ri)期??(qi)為??(wei)3月??(yue)19日??(ri)(11.6℃)?，因??(yin)此?(ci)判??(pan)定??(ding)2025年??(nian)北??(bei)京??(jing)入??(ru)春??(chun)日??(ri)期??(qi)為??(wei)3月??(yue)19日??(ri)??。　　今??(jin)年??(nian)北??(bei)京??(jing)入??(ru)春??(chun)較??(jiao)常??(chang)年??(nian)偏?(pian)早??(zao)??，主??(zhu)要??(yao)原??(yuan)因??(yin)是??(shi)2月??(yue)下??(xia)旬??(xun)以??(yi)來?(lai)??，華??(hua)北?(bei)地??(di)區(qū)??(qu)冷??(leng)空??(kong)氣??(qi)勢??(shi)力?(li)較??(jiao)弱??(ruo)??，降??(jiang)水??(shui)偏??(pian)少??(shao)??，使??(shi)得??(de)氣??(qi)溫??(wen)回??(hui)升??(sheng)明??(ming)顯??(xian)??，導(dǎo)??(dao)致??(zhi)入??(ru)春??(chun)時??(shi)間??(jian)提??(ti)前??(qian)??。??。