Atmospheric Change & Forests

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About Us

The Atmospheric Change and Forests Working Group promotes the knowledge of forest ecosystems through the science and monitoring of the effects of atmospheric pollutants on these forests, through international cooperation and dissemination of new technologies and techniques among the cooperating countries.


  • Promote the collection, exchange and dissemination of information and techniques in the field of monitoring of forest health and the evaluation of the effects of atmospheric changes on forests.
  • Prepare publications on the state of the health of forests in North America based on the monitoring of forest health conditions in the three countries.
  • Foster international cooperation, in the field of detection and effects of atmospheric changes on forests, within North America among scientists and forest managers and other natural resource agencies.
  • Foster communication with other NAFC Working Groups and with those of other FAO Forestry Commissions.

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  • Latest minutes from the Working Group meeting in Queretero, Mexico in October 2001 are now available:
  • The Working Group is currently preparing a pamphlet on the impacts of tropospheric ozone on sensitive
    forest ecosystems of North America (to be published late 2002-early 2003).

  • Minutes (October 3-5, 2000) available in:
  • Health of North American Forests, published in 1996 by the Canadian Forest Service, Ottawa, Ontario K1A0E4, catalogue no. Fo42-252/1996, ISBN 0-662-62141-7, Available in English, French and Spanish
  • Research studies in the "Desierto de los Leones" regional park in the Federal District of Mexico include: Ozone & Meteorological Monitoring
  • Sedimentation of Nitrates and Sulfates in Pinus hartwegli
  • Ozone damage-tolerant native clones of Prunus caulil
  • Filter pack monitoring using Estc flow-controlled pumps
  • Canadian system for early detection of acid rain
  • Passive ozone monitoring
  • Historical record of the Atmospheric Changes and Forests Study Group: contact Elvia Niebla, US Forest Service

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  Mexico Canada USA  

M.C. Tomas Hernández Tejeda
Av. Progreso No. 5
Coyoacán C.P. 04110
México, D.F.
Tel: +52-5-554-8453

Dra. Maria Lourdes de Bauer
Colegio de Postgraduados
Instituto de Recursos Naturales
Montecillo, Mexico
Tel: +52-5-951-0185

David Paré
Research scientist
Canadian Forest Service
Centre de foresterie des Laurentides
1055, rue du P.E.P.S. C.P. 10380, succ. Sainte-Foy, Québec (Québec) G1V 4C7
Government of Canada, Natural Resources Canada, Canadian forest Service, Laurentian Forestry Centre
1055 du P.E.P.S., P.O. Box 10380, Stn. Sainte-Foy, Quebec, Quebec Canada G1V 4C7
Tel: 418 648 7598
Fax: 418 648 5849

Silvina Carou
Air Quality Science Advisor
Environment Canada
Science Integration
4905 Dufferin Street
Toronto, Ontario M3H 5T4
Telephone : 416-739-4879
Fax : 416-739-4882

Associate Members:

Kevin Percy
Research Scientists
Canadian Forest Service
Natural Resources Canada
PO Box 4000
Fredericton, NB E3B 5P7
Tel: 1-506-452-3524
Fax: 1-506-452-3140



Steve McNulty
(Current Chair)
US Forest Service

Dr. Mark Fenn
Research Plant Pathologist Pacific Southwest Research Station
US Forest Service
4955 Canyon Crest Drive
Riverside, California 92507
Tel: 909-680-1565
Fax: 909-680-1501

Associate Members:

Peter Lahm
US Forest Service
Tel: 602-207-2356

Dr. Robert Musselman
US Forest Service
Tel: 970-498-1239

WeiMin Hao
US Forest Service

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