The pH of Hawaiian precipitation a preliminary report
The pH of Hawaiian precipitation a preliminary report
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夏威夷降水 pH 值初步报告
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
A. Yoshinaga
中科院分区：
文献类型：
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作者：
John M. Miller;A. Yoshinaga
自1974年以来，夏威夷岛上的不同地点每天或每两周收集一次降水样本。这些地点的海拔从海平面到3400米不等。样本在采集当天进行了pH值和电导率的分析。在此期间，对选定的样本进行了主要阴离子检测，如硫酸盐和硝酸盐。
PH数据表明，随着海拔的升高，酸度逐渐增加。海平面站点的平均PH值为5.2，而海拔2500米以上的站点平均PH值为4.3。据推测，较高水平的酸度增加可能是由于酸性物质，无论是天然的还是人为的，在对流层中段被长距离输送，并在夏威夷群岛的雨水中被清除。
Daily or biweekly precipitation samples have been collected at various sites on the island of Hawaii since 1974. The elevations of the sites ranged from sea level to 3400 m. Samples were analyzed on the day of collection for pH and conductivity. Detection of major anions, such as sulfate and nitrate, were made on selected samples during the period.
The pH data show a progressive increase of acidity with elevation. The sea level site averaged pH 5.2, in contrast to the sites above 2500 m, which averaged pH 4.3. It is postulated that the increase in acidity at higher levels might be explained by acidic materials, either natural or man-made, being transported over long distances in the mid-troposphere and being scavenged in the rain of the Hawaiian islands.