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Short-term trends in sulfate deposition at selected bulk precipitation stations in New York

Atmospheric Environment

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Abstract

Trends in rainfall-adjusted sulfate concentration were assessed for 5-yr subrecords of the 14.5-17 yr of monthly bulk-deposition data from five stations in New York by using the seasonal Kendall test. For the 5-yr subrecord from 1978 to 1982, the trends for the bulk deposition were similar to those for weekly wet-only deposition for adjacent stations of the National Atmospheric Deposition Program (NADP). The long-term trend at each of the bulk-precipitation sites was downward and statistically significant at P < 0.02, whereas 26% of the 69 subrecords had trends that were statistically significant only at P <0.2. Of these statistically significant subrecord trends, 10% were positive (opposite to the long-term trend). Furthermore, the slopes of the subrecord trends tended to be much steeper than those of the whole record. These 5-yr trends, consequently, are poor indicators of the trends that occur over much longer periods in the same record.Trends in rainfall-adjusted sulfate concentration were assessed for 5-yr subrecords of the 14. 5-17 yr of monthly bulk-deposition data from five stations in New York by using the seasonal Kendall test. For the 5-yr subrecord from 1978 to 1982, the trends for the bulk deposition were similar to those for weekly wet-only deposition for adjacent stations of the National Atmosheric Deposition Program (NADP). The long-term trend at each of the bulk-precipitation sites was downward and statistically significant at p less than 0. 02, whereas 26 percent of the 69 subrecords had trends that were statistically significant only at P less than 0. 2. Of these statistically significant subrecord trends, 10 percent were positive (opposite to the long-term trend). Furthermore, the slopes of the subrecord trends tended to be much steeper than those of the whole record. These 5-yr trends, consequently, are poor indicators of the trends that occur over much longer periods in the same record.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Short-term trends in sulfate deposition at selected bulk precipitation stations in New York
Series title:
Atmospheric Environment
Volume
22
Issue:
6
Year Published:
1988
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Atmospheric Environment
First page:
1175
Last page:
1178
Number of Pages:
4