厦门大气降水的氢氧同位素研究  

A study on hydrogen and oxygen isotopes composition of precipitation in Xiamen

作　　者：蔡明刚[1] 黄奕普[1] 陈敏[1] 刘广山[1] 金德秋[2] 周锡煌[2] 

机构地区：[1]厦门大学海洋系,厦门361005 [2]北京大学化学系,北京100871

出　　处：《台湾海峡》2000年第4期446-453,共8页Journal of Oceanography In Taiwan Strait

基　　金：高等学校博士学科点专项科研基金!(980 3840 8号 );福建省自然科学基金!(D970 0 2号 )资助项目

摘　　要：本文研究了厦门地区大气降水的氢、氧同位素组成 ,提出了大气降水线方程为δD =8.1 6δ18O + 1 0 .6 8,并与全国及全球降水线进行比较 ,揭示了该降水线方程的特征。对全年氘过剩值 (d)及降水线特征研究表明 ,厦门岛全年降水来源较为单一 ,主要为海洋性气团。降水中δD与δ18O的降水量效应明显 ,且该影响远远掩盖了温度效应。Hydrogen and oxygen isotopic compositions of the precipitation in Xiamen area during 1998 were studied. The meteoric water line (MWL) equation for Xiamen area was presented and its characteristics were revealed by the comparison with the global and Chinese MWL equations. There was a clear negative correlation between δ values of the precipitation and monthly precipitation amount. This precipitation amount effect has overshadowed the temperature effect in Xiamen area. In addition, the effect of vapor source of the precipitation on theδ values as well as 'deuterium excess' were discussed also.

关 键 词：氧同位素 大气降水 氢同位素 温度效应 降水线 降水量效应 厦门市 

分 类 号：P426.61[天文地球—大气科学及气象学]