Sökning: "ice flux"

Visar resultat 11 - 15 av 46 avhandlingar innehållade orden ice flux.

  1. 11. Formation and Distribution of Marine Biogenic Halocarbons with Emphasis on Polar Regions

    Författare :Anders Karlsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; volatile biogenic halocarbons; Arctic Ocean; Southern Ocean; sea ice; snow; air-sea exchange; cyanobacteria;

    Sammanfattning : It is well-established that marine micro- and macroalgae form volatile halogenated compounds (halocarbons). Production occurs throughout the world ocean with strong regional sources in coastal areas. In the atmosphere, these compounds are converted to reactive inorganic halogen compounds, which degrade ozone. LÄS MER

  3. 12. Ocean Climate Variability over Recent Centuries Explored by Modelling the Baltic Sea

    Författare :Daniel Hansson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; ocean climate; modelling; reconsstruction; water temperature; sea ice; river runoff; salinity; oxygen concentration; long-term;

    Sammanfattning : Natural variability and anthropogenic factors both contribute to changes in the ocean climate of the Baltic Sea. Observations over the past century indicate that changes in environmental settings and ocean climate have taken place, attracting considerable media attention and building public awareness of climate and environmental issues related to the Baltic Sea. LÄS MER

  4. 13. The role of biogeophysical feedbacks and their impacts in the arctic and boreal climate system

    Författare :Wenxin Zhang; Institutionen för naturgeografi och ekosystemvetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arctic and boreal vegetation change; Biogeophysical feedbacks; Albedo; Latent heat; Carbon budget; Representative concentration pathways; Eearth system model; LPJ-GUESS; RCA; Sea ice;

    Sammanfattning : The physical environment in the northern high latitudes including the Arctic cryosphere has undergone dramatic changes due to anthropogenic greenhouse gas warming, which since pre-industrial times has been twice or more the rate of global mean warming. Global climate models predict that this accelerated warming will continue for at least the next few decades. LÄS MER

  5. 14. Studies of the Arctic Ocean sea ice cover and hydrothermal heat fluxes

    Författare :Christian Stranne; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Oceanography; Arctic climate sensisitvity;

    Sammanfattning : Since reliable ice extent estimates from satellite data became available in 1979 the Arctic sea ice cover has followed a declining long term trend. Over the last decade the decline has accelerated with record low sea ice extents recorded in 2002, 2005, 2007 and 2012. LÄS MER

  7. 15. Some Physical and Environmental Aspects of Shallow Ice Covered Lakes : Emphasis on Lake Vendyurskoe, Karelia, Russia

    Författare :Osama Ali Maher; Avdelningen för Teknisk vattenresurslära; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; convective mixing; dissolved oxygen; heat exchange ice–water; ice cover; oscillatory currents; sediment heat fluxes; water temperature;

    Sammanfattning : The ice cover presence on the surface of a lake insulates the water body from the atmosphere. This prevents or reduces the influence of processes which depend on the exchange between the atmosphere and the water surface. LÄS MER