Acidic Precipitation

1. Measurement of Dry Deposition to Vegetative Surfaces

   • Jean Muhlbaier Dasch

   Pages 205-210

2. Modeling of Throughfall Chemistry and Indirect Measurement of Dry Deposition

   • A. H. Johannes, Y. L. Chen, K. Dackson, T. Suleski

   Pages 211-216

3. The Composition of Precipitation at Snoqualmie Pass and Stevens Pass in the Central Cascades of Washington State

   • L. Clint Duncan, E. B. Welch, Wally Ausserer

   Pages 217-229

4. Precipitation Chemistry Measurement in Alberta

   • Henry L. Bertram, Nirmal C. Das, Yan K. Lau

   Pages 231-237

5. Rainfall Acidity in Northern Britain — Exploring the Data

   • J. N. Cape, D. Fowler

   Pages 239-244

6. The Role of Alkaline Materials in Precipitation Chemistry: A Brief Review of the Issues

   • Donald F. Gatz, William R. Barnard, Gary J. Stensland

   Pages 245-251

7. Snow Chemistry in the Flin Flon Area of Manitoba, 1981–1984

   • S. Floyd Phillips, David L. Wotton, Dale B. McEachern

   Pages 253-261

8. Spatial and Temporal Pattern of Sulfate and Nitrate Wet Deposition in Ontario

   • A. J. S. Tang, W. H. Chan, D. H. S. Chung, M. A. Lusis

   Pages 263-273

9. The Spatial and Temporal Variation of the Sulphate to Nitrate Ratio in Precipitation in Eastern North America

   • Peter W. Summers, Leonard A. Barrie

   Pages 275-283

10. Alkaline Materials Flux from Unpaved Roads: Source Strength, Chemistry and Potential for Acid Rain Neutralization

    • W. R. Barnard, Gary J. Stensland, Donald F. Gatz

    Pages 285-293

11. Uncertainties in Estimating Areal Means: With Applications to NADP/NTN Data

    • Chin-Fei Hsu

    Pages 295-302

12. Wet and Dry Deposition of Sulphates and Nitrates in Eastern Canada: 1979–1982

    • L. A. Barrie, A. Sirois

    Pages 303-310

13. Overview of Historical and Paleoecological Studies of Acidic Air Pollution and its Effects

    • Ronald B. Davis, Pamela M. Stokes

    Pages 311-318

14. Recent and Historic Red Spruce Mortality: Evidence of Climatic Influence

    • Arthur H. Johnson, Andrew J. Friedland, Jonathan G. Dushoff

    Pages 319-330

15. A Review of the Chemical Record in Lake Sediment of Energy Related Air Pollution and its Effects on Lakes

    • Stephen A. Norton

    Pages 331-345

16. Diatom-Based pH Reconstruction Studies of Acid Lakes in Europe and North America: A Synthesis

    • R. W. Battarbee, D. F. Charles

    Pages 347-354

17. The PIRLA Project (Paleoecological Investigation of Recent Lake Acidification): Preliminary Results for the Adirondacks, New England, N. Great Lakes States, and N. Florida

    • Donald F. Charles, Donald R. Whitehead, Dennis S. Anderson, Raymond Bienert, Keith E. Camburn, Robert B. Cook et al.

    Pages 355-365

18. Comparison of Paleolimnological with Magic Model Reconstructions of Water Acidification

    • R. F. Wright, B. J. Cosby, G. M. Hornberger, J. N. Galloway

    Pages 367-380

19. Changes in Fish Populations in Southernmost Norway during the Last Decade

    • I. H. Sevaldrud, O. K. Skogheim

    Pages 381-386

20. Evidence for Recent Acidification of Lentic Soft Waters in the Netherlands

    • R. S. E. W. Leuven, H. L. M. Kersten, J. A. A. R. Schuurkes, J. G. M. Roelofs, G. H. P. Arts

    Pages 387-392

Since the beginning of the 1980's, research has continued to clarify and improve our understanding of the problern of the ecological impact of acidic precipitation. From September 15-20, 1985, Canada convened the the Muskoka Symposium on Acidic Precipitation to review progress and help chart the direction of future studies. The Conference was held in central Ontario, Canada, a region of heavy sulphate deposition where aquatic effects are evident. Approximately 700 people attended, over 500 of whom were research scientists. Over 400 papers were presented. Nearly 200 of the papers are included in these proceedings, which tagether give the present state of the art of acid rain research. The Conference focused on atmospheric science and aquatic and terrestrial effects. I have made some general observations on progress in clarifying issues and linkages between these areas of research. Out­ standing issues which require a great deal more work are identified. These are my views, influenced by personal bias and limited by my expertise. Atmospheric Seiences Three aspects were covered: measurement techniques, the actual measure­ ments, and source-receptor relationships.

• acid
• deposition
• future
• measurement
• measurement techniques
• precipitation
• research
• science
• air pollution and air quality

• Atmospheric Environment Service, Canada

  Hans C. Martin

Policies and ethics