Changes of Accumulated Temperature, Growing Season and Precipitation in the North China Plain from 1961 to 2009

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摘要 Usingthehigh-qualityobservedmeteorologicaldata,changesofthethermalconditionsandprecipitationovertheNorthChinaPlainfrom1961to2009wereexamined.Trendsofaccumulatedtemperatureandnegativetemperature,growingseasonduration,aswellasseasonalandannualrainfallsat48stationswereanalyzed.Theresultsshowthattheaccumulatedtemperatureincreasedsignificantlyby348.5℃dayduetoglobalwarmingduring1961-2009whiletheabsoluteaccumulatednegativetemperaturedecreasedapparentlyby175.3℃day.Thestartofgrowingseasondisplayedasignificantnegativetrendof-14.3daysduring1961-2009,buttheendofgrowingseasondelayedinsignificantlyby6.7days.Asaresult,thelengthofgrowingseasonincreasedby21.0days.Theannualandautumnrainfallsdecreasedslightlywhilesummerrainfallandsummerrainydaysdecreasedsignificantly.Incontrast,springrainfallincreasedslightlywithoutsignificanttrends.AlltheresultsindicatethatthethermalconditionswereimprovedtobenefitthecropgrowthovertheNorthChinaPlainduring1961-2009,andthedecreasingannualandsummerrainfallshadnodirectnegativeimpactonthecropgrowth.ButthedecreasingsummerrainfallwaslikelytoinfluencethewaterresourcesinNorthChina,especiallytheundergroundwater,reservoirwater,aswellasriverrunoff,whichwouldhaveinfluencedtheirrigationofagriculture.
机构地区 不详
出处 《气象学报:英文版》 2011年4期
出版日期 2011年04月14日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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