SEASONAL, EPISODIC AND TARGETED CONTROL OF SULFATE DEPOSITION
SEASONAL, EPISODIC AND TARGETED CONTROL OF SULFATE DEPOSITION
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DOI：
10.1080/00022470.1986.10466114
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发表时间：
1986-07-01
期刊：
影响因子：
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通讯作者：
KUMAR, S
中科院分区：
文献类型：
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作者：
GOLOMB, D;FAY, JA;KUMAR, S
在北美东部的许多受体上观察到的湿硫酸盐沉积季节速率的巨大差异表明，仅在一年中的夏季（4 - 9月）减少SO2排放将比全年减少相同数量的排放带来更大的年度湿硫酸盐沉积减少量。将减少排放的目标锁定在生态敏感区夏季沉积量最大的源区，将进一步增加增益因子，即年沉积减量与年排放减量的比值。在美国东北部，每年10到15次降雨沉积了大约60%的湿硫酸盐；在这些重沉积事件之前的干旱期减少排放可以进一步增加增益因子。然而，很难预测这些事件，而且它们不会同时发生在该国的大片地区。
The large differences in seasonal rates of wet sulfate deposition observed at many receptors in eastern North America imply that reducing SO2 emissions only in the summer half of the year (April-September) would bring about greater annual wet sulfate deposition reductions than reducing emissions by the same amount year-round. Targeting the emission reductions to those source areas which contribute the bulk of summer depositions in ecologically sensitive areas would increase further the gain factor, defined as the ratio of annual fractional deposition decrement to annual fractional emission decrement. In the northeastern U.S., between 10 and 15 rain episodes deposit about 60 percent of the annual wet sulfate; reducing emissions in the dry periods preceding these heavy deposition episodes could further increase the gain factor. However, it is difficult to predict these episodes, and they do not occur simultaneously over large regions of the country.