Search for dissertations about: "global carbon cycle"

Showing result 21 - 25 of 162 swedish dissertations containing the words global carbon cycle.

2. 21. Mechanisms of below-ground carbon cycling in subarctic ecosystems

   Author : Maria Olsrud; Institutionen för naturgeografi och ekosystemvetenskap; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; cartography; climatology; Fysisk geografi; geomorfologi; marklära; kartografi; klimatologi; pedology; geomorphology; Physical geography; subarctic tundra; phosphorous mobilization; organic acids; open top chamber experiment; 15N natural abundance; Ericoid mycorrhizas; global change; 14C pulse-labelling; Carbon allocation;

   Abstract : Some components of the below-ground carbon (C) cycle in terrestrial ecosystems are still poorly understood. A better understanding will be necessary to predict adequately the impacts of global change factors on C cycling and storage, especially in high-latitude ecosystems, where much of the C is stored below-ground. READ MORE

4. 22. Greenhouse Gas Dynamics in Ice-covered Lakes Across Spatial and Temporal Scales

   Author : Blaize Amber Denfeld; Gesa Weyhenmeyer; Kimberly Wickland; Uppsala universitet; []
   Keywords : carbon cycle; climate change; cryosphere; carbon dioxide; methane; lakes; winter limnology; methane oxidation; nutrients; catchment; Limnologi; Limnology;

   Abstract : Lakes play a major role in the global carbon (C) cycle, despite making up a small area of earth’s surface. Lakes receive, transport and process sizable amounts of C, emitting a substantial amount of the greenhouse gases, carbon dioxide (CO2) and methane (CH4), into the atmosphere. READ MORE

5. 23. Biophysical controls on CO2 evasion from Arctic inland waters

   Author : Gerard Rocher-Ros; Reiner Giesler; Ryan A. Sponseller; Ann-Kristin Bergström; Paul del Giorgio; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Inland waters; carbon dioxide; organic carbon; inorganic carbon; arctic; CO2 evasion; DOC; DIC; streams; metabolism; oxygen; Limnology; limnologi;

   Abstract : CO2 evasion to the atmosphere from inland waters is a major component of the global carbon (C) cycle. Yet spatial patterns of CO2 evasion and the sources of C that fuel evasion remain poorly understood. READ MORE

6. 24. Greenhouse gas emission from tropical reservoirs : Spatial and temporal dynamics

   Author : Annika Linkhorst; Sebastian Sobek; Frédéric Guérin; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; methane; carbon dioxide; climate; carbon cycle; lake; limnology; inland water;

   Abstract : The emission of methane (CH4) and carbon dioxide (CO2) from reservoirs has been estimated to make up for about 1.3% of the global anthropogenic greenhouse gas emission. The impoundment of a river leads to the accumulation of sediment that is brought in from inflowing rivers, and the sediment organic matter is degraded to CH4 and CO2. READ MORE

7. 25. Model analysis of ocean carbon storage and transport across climate states

   Author : Malin Ödalen; Jonas Nycander; Johan Nilsson; Kevin I. C. Oliver; Nathaelle Bouttes-Mauhourat; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Oceanography; Climate; Climate model; Carbon cycle; Paleoclimate; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

   Abstract : The ocean carbon cycle plays a fundamental role in the Earth’s climate system, on decadal to multi-millennial timescales. Of the carbon held in the ocean, the atmosphere, and the terrestrial biosphere combined, more than 90% resides in the ocean. Carbon enters the surface ocean through air-sea gas exchange and from terrestrial sources. READ MORE