Operation and research at the Ithaca MAP3S regional precipitation chemistry site: Annual progress report for 1989

Technical Report · Sat Jul 01 04:00:00 EDT 1989

OSTI ID:5843257

Butler, T J; Likens, G E

The Ithaca MAP3S Regional Precipitation Chemistry Site, in continuous operation since September 1976 is now operating on a daily sampling rather than event sampling basis. Two other network stations (NDDN and EFPVMN) are co-located currently at the site. Research associated with MAP3S over the last year includes an analysis of the impact of changing emissions levels on precipitation chemistry in the eastern US. From 1977 to 1986 a 20% change in SO/sub 2/ emissions and a 10% change in NO/sub x/ emissions have occurred over the eastern and midwestern US. Six continental precipitation chemistry sites from the MAP3S network, plus the Hubbard Brook Experimental Forest, New Hampshire, show a direct relationship between emission levels and precipitation concentrations, except for Penn State, Pennsylvania. MAP3S sites at Illinois and Ohio, located closest to the major SO/sub 2/ source regions, demonstrate statistically significant (P < 0.05) linear regressions of SO/sub 4/ concentrations on SO/sub 2/ emissions. Hubbard Brook shows the strongest relationship (P < 0.01) between SO/sub 2/ emissions and SO/sub 4/ concentration in precipitation. Only Whiteface Mountain, New York, shows a significant relationships (P < 0.10) for NO/sub x/ emissions and NO/sub 3//sup /minus// concentrations. However, Illinois, Ohio, Ithaca, and Hubbard Brook show significant linear regressions of H/sup +/ concentrations on emissions of SO/sub 2/ + NO/sub x/ (P < 0.10, 0.05, 0.05, and 0.01, respectively). Overall, for the entire region examined, decreasing SO/sub 2/ emission levels appear to have decreased SO/sub 4/ concentrations with an efficiency of 66% + 17% (s.e.).

• Research Organization: Institute of Ecosystem Studies, Millbrook, NY (USA)
• DOE Contract Number: FG02-85ER60292
• OSTI ID: 5843257
• Report Number(s): DOE/ER/60292-5; ON: DE89016309
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring &amp; Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ANNUAL VARIATIONS
ATMOSPHERIC PRECIPITATIONS
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
PROGRESS REPORT
RAIN
SEASONAL VARIATIONS
SIZE
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
USA
VARIATIONS