| Autor: |
J. Stuart Warner, R Butler, B. J. Bell |
| Rok vydání: |
1985 |
| Předmět: |
|
| Zdroj: |
Journal of the Air Pollution Control Association. 35:130-132 |
| ISSN: |
0002-2470 |
| Popis: |
The authors look for some specific effects in the Hubbard Brook data due to the local source. First among these is a higher concentration of sulfate and nitrate during the winter. Since primary sulfate emissions from coal burning are low and the wintertime conversion of atmospheric SO2 to sulfate drops sharply due to lack of oxidants it is not obvious that concentrations should increase. In fact one might expect a decrease. Sulfate concentration correlations with N to NE winds might exist but the authors really have no information on the valley winds. The variable sulfate concentrations because of plume alignment over the deposition collector would tend to be erased due to the weekly nature of the data. A meaningful analysis needs good local wind data. Here the authors must show variability, not assume it. The authors' expected inverse dependence of sulfate concentration on precipitation amount might be a weaker factor than the timing of the precipitation and the collection techniques. This area certainly merits a more intensive investigation. One final comment: In my September 1984 discussion paper I raised the question about the effects of the local source on the Hubbard Brook deposition data. Here we see a statistical analysis and absolutely no data from which it was constructed. I feel that this investigation as such is not adequate and that the scientific community would be better served if the Hubbard Brook deposition data were to be released to such community for independent investigation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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