Aquatic effects of acidic deposition by Timothy J Sullivan

By Timothy J Sullivan

"While now not an everyday information merchandise, acidic deposition remains to be a common factor for environmental managers and coverage makers. Emissions of sulfur and nitrogen from strength crops, commercial amenities, and motorcars - significant motives of acidic deposition - nonetheless pour into the ambience each day. Aquatic results of Acidic Deposition summarizes and synthesizes significant developments in medical research, Read more...

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0 at higher initial CB concentrations. , 1991). Since 1990, more quantitative data have become available. , Eshleman and Kaufmann, 1987). In other cases, a maximum “reasonable” F was calculated for a given lake or stream by assuming a lower reasonable level for initial pre-acidification CB. A high F-factor is then estimated as the difference between current CB and the lower estimate for pre-industrial CB divided by the estimated change in (SO42- + NO3-) concentration. , 1984, 1987). Brakke et al.

S. , 1992). No simple causality between forest damage and air pollution has been identified in areas without large local emission sources. Matzner and Murach (1995) contended that an integrating hypothesis of regional effects of air pollution on forests is almost untestable because of the long-time lags in forest response, large number of natural and anthropogenic stresses that interact with each other, and long history of local forest management. Based on a review of the literature, these authors postulated that: 1.

The significance of the ANCG/[CB] ratio has been misinterpreted in the acidic deposition literature. A ratio much less than one does not necessarily Background and Approach 29 indicate that acidification [loss of ANC, as defined by Galloway (1984)] has occurred. 0 only where surface water organic acid anion concentrations (RCOO-) are low and both atmospheric and watershed sources of SO42- are minimal. , Cook and Jager, 1991). Watershed sources of SO42- are derived from weathering reactions that yield base cations that are charge balanced by SO42- rather than HCO3-.

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