Essays about: "vegetation feedbacks"

Showing result 1 - 5 of 7 essays containing the words vegetation feedbacks.

1. 1. Reindeer induced changes in vegetation composition and plant traits on a tundra-forest border

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Femke Pijcke; [2019]
   Keywords : physical geography; ecosystem analysis; plant functional traits; nutrient allocation; grazing; reindeer; Earth and Environmental Sciences;

   Abstract : Reindeer (Rangifer tarandus) are the most common large herbivores in the arctic. With a habitat spreading over the entire circumpolar region, they can have a substantial effect on plant species composition and ecosystem processes and functions. READ MORE

3. 2. Hydrologic modelling of the Zackenberg river basin : an applied study using the Soil and Water Assessment Tool

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Malin Ahlbäck; [2018]
   Keywords : Greenland; SWAT; High Arctic; Distributed Hydrologic Modelling; GIS; surface Water; Earth and Environmental Sciences;

   Abstract : Since the 1980s, the Arctic has experienced an amplified warming of more than twice the rate of the global-mean, leading to large-scale changes in the Arctic hydrologic system, ultimately having cascading feedbacks on the global climate. However, few of today’s distributed models manage to capture the complex processes in Arctic hydrology, and therefore, the aim of this thesis was to evaluate the usage of the distributed Soil and Water Assessment Tool (SWAT) model, to see whether it could capture the different surface water paths and processes characterizing the Arctic water cycle. READ MORE

4. 3. Can the introduction of the topographic indices in LPJ-GUESS improve the spatial representation of environmental variables?

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Alejandra Narváez Vallejo; [2016]
   Keywords : smooth topography; drainage area; slope; topographic wetness index; LPJ-GUESS; GIS; physical geography and ecosystem analysis; geography; geographic information systems; leaf area index; spatial patterns; MODIS LAI.; Earth and Environmental Sciences;

   Abstract : Ecosystem modelling is an always evolving science trying to catch the complexity of the nature and its principles to model environmental responses in a realistic way. Over and over, models try to introduce more variables and interactions to achieve better representations of phenomena of interest like the responses of the ecosystem to a fast changing world (climate change, land use change). READ MORE

5. 4. Modelling vegetation dynamics and carbon fluxes in a high Arctic mire

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Laura Reinelt; [2015]
   Keywords : methane dynamics; biogeochemical cycling; vegetation dynamics; ecosystem modelling; LPJ-GUESS; geography; physical geography; high Arctic wetland; Zackenberg; Earth and Environmental Sciences;

   Abstract : High Arctic wetlands are an important component of the global climate system. Nevertheless estimations of their expected response to climate change and associated climate-feedbacks have large uncertainties. Improving models for vegetation and carbon dynamics of ecosystems is an important step towards making predictions more accurate. READ MORE

6. 5. Variations and correlations among climatic and environmental variables in Australia using GIS and remote sensing

   University essay from Institutionen för naturgeografi och kvartärgeologi (INK)

   Author : Robert Hellmark; [2013]
   Keywords : ;

   Abstract : This study was performed because of the potential vulnerability to climate change of the Australian continent. For example, global warming may increase the frequency and severity of drought [McAlpine, C.A., Syktus, J. READ MORE