Search for dissertations about: "net ecosystem exchange"
Showing result 1 - 5 of 16 swedish dissertations containing the words net ecosystem exchange.
-
1. Impact of cold climate on boreal ecosystem processes : exploring data and model uncertainties
Abstract : The impact of cold climate on physical and biological processes, especially the role of air and soil temperature in recovering photosynthesis and transpiration in boreal forests, was investigated in a series of studies. A process-based ecosystem model (CoupModel) considering atmospheric, soil and plant components was evaluated and developed using Generalized Likelihood Uncertainty Estimation (GLUE) and detailed measurements from three different sites. READ MORE
-
2. Modeling the Seasonality of Carbon, Evapotranspiration and Heat Processes for Cold Climate Conditions
Abstract : The productivity of agricultural and forest ecosystems in regions at higher latitudes is to a large extent governed by low temperature and moisture conditions. Environmental conditions are acting both above- and below-ground and regulating carbon fluxes and evapotranspiration. READ MORE
-
3. Surface energy exchange and land-atmosphere interactions of Arctic and subarctic tundra ecosystems under climate change
Abstract : The surface energy balance determines the functioning of any ecosystem on the Earth but is still poorly understood in Arctic and subarctic biomes. In a dynamic system, such as the Earth’s climate, any change in its characteristics modifies the exchange of energy, water, and greenhouse gases between the surface and the atmosphere. READ MORE
-
4. Effects of future climate on carbon assimilation of boreal Norway spruce
Abstract : In boreal forests, the main factors limiting biomass production are the harsh climate, which combines a short growing season and low annual levels of incoming solar energy, and the limited availabilit... mery of nitrogen. READ MORE
-
5. Tundra meets atmosphere : Seasonal dynamics of trace gas exchange in the High Arctic
Abstract : Arctic environments have experienced strong warming in recent decades, which is affecting the carbon cycle of tundra ecosystems.Degrading permafrost, diminishing snow cover, and changing hydrology are examples of ongoing processes that affect the land-atmosphere interactions and seasonal ecosystem dynamics. READ MORE