西南师范大学学报(自然科学版)
西南師範大學學報(自然科學版)
서남사범대학학보(자연과학판)
JOURNAL OF SOUTHWEST CHINA NORMAL UNIVERSITY
2015年
5期
142-149
,共8页
δ2H%δ18O%氢氧同位素%大气降水%水汽来源%云南地区
δ2H%δ18O%氫氧同位素%大氣降水%水汽來源%雲南地區
δ2H%δ18O%경양동위소%대기강수%수기래원%운남지구
δ2 H%δ18 O%precipitation%moisture sources%Yunnan
国际原子能机构(IAEA)和世界气象组织(WMO)联合建立了全球降水中稳定同位素组成监测网(GNIP),对昆明站降水中稳定同位素组成进行连续的跟踪监测所得出的数据资料,分析了该地区降水中δ18 O与温度、降水量之间的关系,揭示了降水中δ2H、δ18O的变化特征,讨论了水汽输送对降水中δ2H和δ18O变化的影响。位于西南水汽通道上的昆明站降水中的稳定同位素比率具有显著的季节变化,旱季(11-4月)降水中平均值明显高于雨季(5-10月),显著的降水量效应说明昆明站降水的水汽主要来源于低纬度海洋。与全球大气水线相比,昆明站大气水线的斜率和常数项均较小。结果表明,年内尺度上,昆明站大气降水中δ18 O与降水量、温度之间存在相关关系,即该地区降水中δ18 O的变化具有显著的降水量效应及反温度效应,利用GrADS模拟该地区风矢量场发现,在夏季风期间,降水中较低的δ18 O主要受来自印度洋暖湿水汽输送的影响,在冬季风期间,降水中较高的δ18 O值主要受西风带水汽输送以及当地蒸发水汽的影响。
國際原子能機構(IAEA)和世界氣象組織(WMO)聯閤建立瞭全毬降水中穩定同位素組成鑑測網(GNIP),對昆明站降水中穩定同位素組成進行連續的跟蹤鑑測所得齣的數據資料,分析瞭該地區降水中δ18 O與溫度、降水量之間的關繫,揭示瞭降水中δ2H、δ18O的變化特徵,討論瞭水汽輸送對降水中δ2H和δ18O變化的影響。位于西南水汽通道上的昆明站降水中的穩定同位素比率具有顯著的季節變化,旱季(11-4月)降水中平均值明顯高于雨季(5-10月),顯著的降水量效應說明昆明站降水的水汽主要來源于低緯度海洋。與全毬大氣水線相比,昆明站大氣水線的斜率和常數項均較小。結果錶明,年內呎度上,昆明站大氣降水中δ18 O與降水量、溫度之間存在相關關繫,即該地區降水中δ18 O的變化具有顯著的降水量效應及反溫度效應,利用GrADS模擬該地區風矢量場髮現,在夏季風期間,降水中較低的δ18 O主要受來自印度洋暖濕水汽輸送的影響,在鼕季風期間,降水中較高的δ18 O值主要受西風帶水汽輸送以及噹地蒸髮水汽的影響。
국제원자능궤구(IAEA)화세계기상조직(WMO)연합건립료전구강수중은정동위소조성감측망(GNIP),대곤명참강수중은정동위소조성진행련속적근종감측소득출적수거자료,분석료해지구강수중δ18 O여온도、강수량지간적관계,게시료강수중δ2H、δ18O적변화특정,토론료수기수송대강수중δ2H화δ18O변화적영향。위우서남수기통도상적곤명참강수중적은정동위소비솔구유현저적계절변화,한계(11-4월)강수중평균치명현고우우계(5-10월),현저적강수량효응설명곤명참강수적수기주요래원우저위도해양。여전구대기수선상비,곤명참대기수선적사솔화상수항균교소。결과표명,년내척도상,곤명참대기강수중δ18 O여강수량、온도지간존재상관관계,즉해지구강수중δ18 O적변화구유현저적강수량효응급반온도효응,이용GrADS모의해지구풍시량장발현,재하계풍기간,강수중교저적δ18 O주요수래자인도양난습수기수송적영향,재동계풍기간,강수중교고적δ18 O치주요수서풍대수기수송이급당지증발수기적영향。
Based on the monitoring data of Kunming Station collected from GNIP which was confounded by IAEA and WMO ,the characteristics of the hydrogen isotope and oxygen isotope and their relationships with temperature and precipitation have been analyzed in order to reveal the moisture sources based on the statistics .First ,the slope and intercept value of LWML are smaller than other regions in consequence of the Yunnan~Guizhou Plateau's high altitude .The statistics shows that the variations of hydrogen isotope and oxygen isotope are different from summer and winter obviously with higher values in winter (Decem-ber~ February) and lower in summer (June~ August) ,which is partially because of different moisture sources .With further study of deuterium excess and other researches ,it is concluded that local evapora-tion accounts for a crucial proportion in the differences of deuterium excess .Then by virtue of GrADS modeling ,the summer and wind vector field respectively were drawn to verify and prove that the summer moisture sources mainly influenced by moisture transportation of Indian Ocean while the winter moisture sources mainly influenced by moisture transportation of westerly zone and local evaporation .