Principal Investigator: | Lafleur, Peter M (19) |
Licence Number: | 14124 |
Organization: | Geography Department, Trent University |
Licensed Year(s): |
2018
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Issued: | Mar 08, 2007 |
Project Team: | Dr. Greg Henry, Dr. Paul Grogan, Dr. Elyn Humphreys |
Objective(s): To study how carbon dioxide is exchanged between various tundra surfaces and the atmosphere in order to understand how future climate change will impact the land surface and in turn how these impacts might influence the climate.
Project Description: The specific research objectives are to quantify the variation in CO2 exchange among different tundra types and to explore the potential impacts of climate change on tundra ecosystems. As for the past three summers CO2 exchange and environmental variables (air and soil temperatures, light, precipitation and wind) will be measured at a central monitoring tower. Two satellite towers were added last summer. The equipment runs automatically and is visited a few times a week for data retrieval and maintenance. CO2 exchange from small (0.5m x 0.5m) plots is measured using a portable gas analyzer. The plots are manipulated by clipping the vegetation to simulate the effects of caribou grazing. These measurements are conducted every few days and are confined to a small patch of upland tundra close to the main tower. A series of wood frames for greenhouses is also installed and each spring the houses are covered with plastic she... Show more