Operation and research at the Ithaca MAP3S regional precipitation chemistry site: Annual progress report for 1988
Ten complete years of precipitation chemistry data, 1977 to 1986, are summarized for the Ithaca MAP3S site. For comparison purposed selected data from the eight other MAP3S sites are included. Notable findings include the following: 1) Monthly concentrations of H/sup +/, SO/sub 4//sup 2/minus//, NO/sub 3//sup /minus//, and NH/sub 4//sup +/ show a high degree of variability from year to year. 2) The Ithaca Site shows a statistically significant (p = 0.05) decline, from 1977 to 1986, in annual volume-weighed H/sup +/ concentration. 3) A statistically significant (p = 0.05) increase in annual volume-weighted NH/sub 4//sup +/ concentration also occurs for this time period at the Ithaca site. 4) Ohio, from 1979 to 1986, shows a significant (p = 0.05) decline in volume-weighted H/sup +/ and SO/sub 4//sup 2/minus// concentration. 5) While there is not a significant (p = 0.05) linear relationship between emissions of SO/sub 2/ and SO/sub 4//sup /minus// concentrations, and emissions of NO/sub x/ and NO/sub 3//sup /minus// concentrations, there is a significant positive relationship for emissions of SO/sub 2/ plus NO/sub x/ versus H/sup +/ concentrations at Ithaca (p = 0.10) and Ohio (p = 0.05). 6) 15% to 30% of dry-deposited particles at the Ithaca site are anthropogenicly derived. On a mass basis, one third of the calcium species are CaSO/sub 4/, probably derived from the conversion of CaCO/sub 3/ interacting with SO/sub 2/ or acidic sulfate. Experimental results suggest this conversion can occur at rates from 0% to 20% per day in the Ithaca area. 13 refs., 23 figs., 2 tabs.
- Research Organization:
- New York Botanical Garden, NY (USA). Inst. of Ecosystem Studies
- DOE Contract Number:
- FG02-85ER60292
- OSTI ID:
- 6926978
- Report Number(s):
- DOE/ER/60292-4; ON: DE88015269
- Country of Publication:
- United States
- Language:
- English
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Operation and research at the Ithaca MAP3S regional precipitation chemistry site
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALINE EARTH METAL COMPOUNDS
ANNUAL VARIATIONS
ATMOSPHERIC PRECIPITATIONS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHALCOGENIDES
CHARGED PARTICLES
DEPOSITION
DOCUMENT TYPES
EMISSION
FEDERAL REGION II
HYDROGEN IONS
IONS
NEW YORK
NITROGEN COMPOUNDS
NITROGEN OXIDES
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
POLLUTANTS
PROGRESS REPORT
RAIN
SEASONAL VARIATIONS
SIZE
SULFATES
SULFUR COMPOUNDS
SULFUR OXIDES
USA
VARIATIONS