DEVELOPMENT AND VALIDATION OF AN ISOTOPIC METHOD FOR ESTIMATING LAKE EVAPORATION
DEVELOPMENT AND VALIDATION OF AN ISOTOPIC METHOD FOR ESTIMATING LAKE EVAPORATION
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DOI：
10.1002/(sici)1099-1085(199610)10:10
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发表时间：
1996
影响因子：
3.2
通讯作者：
J. Gibson;T. Edwards;T. Prowse
中科院分区：
文献类型：
--
作者：
J. Gibson;T. Edwards;T. Prowse
A study designed to test the validity of an isotopic method for estimating evaporation was conducted within a small, tundra lake situated in the continuous Arctic of Canada. Evaporation was determined using an isotope mass balance approach which accounted for quantitatively for isotopic fractionation, progressive evaporator enrichment of δ 18 O and δ 2 H in lake water, and attenuation of enrichment by liquid inputs and atmospheric moisture. Concurrent determinations made using标准的平衡，空气动力学轮廓和A级PANS可以在两个夏季进行严格的比较，这两个夏季的天气状况和氢平衡总体而言，在两个年度的时间间隔中，δ18O的平衡与标准方法相吻合。在这种情况下，定量质量平衡确定在时间间隔少于50天。
A study designed to test the validity of an isotopic method for estimating evaporation was conducted within a small, tundra lake situated in the continental Arctic of Canada. Evaporation was determined using an isotope mass balance approach which accounted quantitatively for isotopic fractionation, progressive evaporative enrichment of δ 18 O and δ 2 H in lake water, and attenuation of enrichment by liquid inputs and atmospheric moisture. Concurrent determinations made using standard mass balance, energy balance, aerodynamic profile and class A pans permitted rigorous comparisons between methods. Results are presented for two summers which had distinct weather conditions and hydrological balances. Overall, the δ 18 O balance was found to be in good agreement with standard methods during both years over time intervals greater than about one week. Owing to a less systematic response of δ 2 H over short time periods, it use is not recommended for quantitative mass balance determinations over time intervals of less than about 50 days in this setting.