Initial snow chemistry survey of the Mogollon Rim in Arizona
Initial snow chemistry survey of the Mogollon Rim in Arizona
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DOI：
10.1016/1352-2310(95)00293-6
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发表时间：
1996-09-01
影响因子：
5
通讯作者：
Betterton, EA
中科院分区：
文献类型：
--
作者：
Barbaris, B;Betterton, EA
利用离子色谱法和仪器中子活化法对1992-1994年冬末/早春期间从亚利桑那州中北部高海拔森林采集的新鲜积雪样品进行了分析。测定了11种主要离子，包括有机种醋酸酯和甲酸酯，以及28种元素。结果表明，雪堆相对原始，大多数样品具有低离子强度（20 +/- 15 mu eq l(-1)）和中等pH（范围4.9-5.7，平均5.4）。典型的造雪风暴在西南海洋气流的影响下向东北移动。1993年1月31日和2月1日，西北风与以犹他州南部为中心的低压系统相结合，带来了化学物质含量增加的降雪。与区域土壤相比，积雪明显富集Zn、As、Sb和Cu。区域源排放（冶炼厂、凤凰城市区）可能影响了雪的化学性质，但其影响似乎微乎其微。这些明显的微量金属富集与在世界各地偏远和农村地区的降水中发现的相似。版权所有爱思唯尔科学有限公司
Fresh snowpack samples collected from high-elevation forests of north-central Arizona during late winter/early spring 1992-1994 were analyzed by ion chromatography and by instrumental neutron activation. Eleven major ions, including the organic species acetate and formate, and twenty-eight elements were determined. The results indicate a relatively pristine snowpack-most samples exhibited low ionic strengths (20 +/- 15 mu eq l(-1)) and moderate pH (range 4.9-5.7, mean 5.4). Typical snow-producing storms moved northeast under the influence of southwesterly flow of marine air. Northwesterly winds associated with a cutoff low pressure system centered over southern Utah on 31 January and 1 February 1993 brought snowfall with increased chemical loading. The snowpack was apparently enriched with Zn, As, Sb, and Cu when compared to regional soils. Regional source emissions (smelters, metropolitan Phoenix) may have influenced the snow chemistry but their impact appears to be minimal. These apparent trace metal enrichments are similar to those found in precipitation in remote and rural locations worldwide. Copyright (C) 1996 Elsevier Science Ltd