Isotopic evidence for the origin of sulphate in coastal rain

被引：62

作者：

Wadleigh, MA ^{[1
]}

Schwarcz, HP ^{[1
]}

Kramer, JR ^{[1
]}

机构：

[1] MCMASTER UNIV, DEPT GEOL, HAMILTON, ON L8S 4M1, CANADA

来源：

TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY | 1996年 / 48卷 / 01期

关键词：

D O I：

10.1034/j.1600-0889.1996.00005.x

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Stable sulphur and oxygen isotopic analyses were combined with chemistry, air mass back trajectories and factor analysis on 39 rainfall events collected at Shelburne, Nova Scotia, Canada in an attempt to identify the sources of sulphate in precipitation falling in this coastal area. Sulphate in the Shelburne rain samples can be described by two-endmember mixing between continental and oceanic sources. The continental endmember is characterized by delta(34)S approximate to 4 degrees/(oo) and delta(18)O similar to 11 degrees/(oo) and is interpreted as representing the average value for continentally-derived, long range transported sulphate. The marine endmember has 634S, 21 degrees/(oo) and delta(18)O approximate to 9.5 degrees/(oo) corresponding to the composition of oceanic dissolved sulphate which entered the rain as sea spray. Significant components of putative marine, DMS-derived sulphate were not observed in any of the rain samples.

引用

页码：44 / 59

页数：16

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