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STUDIES OF EFFECTS OF POLLUTANT GASES ON YOUNG TREES IN OPEN TOP CHAMBERS

Objective

TO GENERATE INFORMATION NEEDED TO ELUCIDATE THE INTERFERENCE BETWEEN AIR POLLUTION AND THE KEY PHYSIOLOGICAL PROCESSES IN FOREST TREES.

THE RESEARCH PROGRAMME MAY BE DIVIDED INTO FOUR DISTINCT PROJECTS, EACH OF WHICH MAKES USE OF NEW OPEN-TOP CHAMBER FACILITIES.

1. THE MAGNITUDE OF PEAK VALUES OF GASEOUS POLLUTANTS WILL BE DETERMINED BY EXTERNAL ENVIRONMENTAL CONDITIONS. SIMILARLY, FOR MIST AND CLOUD SIMULATION, THE TREATMENTS TO BE CARRIED OUT WILL BE GOVERNED BY INFORMATION FROM NEARBY CLOUDWATER MONITORING STATIONS.

2. THE EFFECTS OF EPISODES ON PLANT PHYSIOLOGICAL PROCESSES, IN PARTICULAR CO2 AND WATER VAPOUR EXCHANGE AND THE RESPONSE OF MYCORRHIZAL ASSOCIATIONS OF YOUNG TREE ROOT SYSTEMS TO DIFFERENT TREATMENTS WILL ALSO BE EXAMINED.

3. IN 'CLOUD WATER' TREATED TRESS, THE IMPORTANCE OF THE EFFECTS OF SOLUTION CHEMISTRY AND INSOLUBLE PARTICLES ON NEEDLE FUNCTION WILL BE SEPARATELY EXAMINED AND THE CONCENTRATION BY EVAPORATION OF POLLUTANTS ON WET FOLIAGE AND THEIR POTENTIAL FOR AFFECTING LEAF SURFACES WILL BE ESTIMATED.

4. THE REMAINING PROJECT IS A STUDY OF THE PHYSICAL ENVIRONMENT OF OPEN TOP CHAMBERS, INCLUDING DETAILED STUDIES OF THE NEW OPEN TOP CHAMBERS AT THE ITE LABORATORIES, AND DEVELOPMENT OF A NUMERICAL MODEL TO SIMULATE CHAMBER PROPERTIES. THE MODEL WILL BE USED TO EXAMINE THE PROPERTIES OF CHAMBER SYSTEMS USED ELSEWHERE WITHIN THE ECE.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

NATURAL ENVIRONMENT RESEARCH COUNCIL
Address
C/o Bush Estate
EH26 0QB Penicuik
United Kingdom