Spatial and temporal changes of photosynthetically available radiation, temperature and salinity beneath a variable sea ice cover

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dc.contributor.authorRossnagel, Andrea L.
dc.contributor.examiningcommitteePapakyriakou, Tim (Environment and Geography) Gosselin, Michel (Institut des Sciences de la Mer, Universite du Quebec a Rimouski, Rimouski, Quebec, Canada)en_US
dc.contributor.supervisorBarber, David (Environment and Geography)en_US
dc.date.accessioned2012-01-13T22:29:00Z
dc.date.available2012-01-13T22:29:00Z
dc.date.issued2012-01-13
dc.degree.disciplineEnvironment and Geographyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractMelt ponds greatly increase the transmission of solar radiation through sea ice relative to snow covered or bare ice. This rise in transmittance has the potential to enhance water column heating and primary production. I examine how spatially variable sea ice surfaces control the under-ice salinity, temperature and photosynthetically active radiation (PAR) and provide estimates of solar heating and primary production during melt. Conductivity, temperature and PAR profiles were measured in the Canadian Arctic under snow covered ice, leads, bare ice and melt ponds. The under-ice light field to a depth of 10 to 13 m was highly variable, controlled by increased transmission under melt ponds and shading by bare ice. Below, the light field became relatively homogeneous showing the depth the surface heterogeneity had an effect on transmitted PAR. Furthermore, one water column profile is not representative of the PAR, salinity or temperature under a spatially heterogeneous surface.en_US
dc.description.noteFebruary 2012en_US
dc.identifier.urihttp://hdl.handle.net/1993/5090
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectSea Iceen_US
dc.subjectMelt Ponden_US
dc.subjectPhotosynthetically Available Radiationen_US
dc.subjectArcticen_US
dc.titleSpatial and temporal changes of photosynthetically available radiation, temperature and salinity beneath a variable sea ice coveren_US
dc.typemaster thesisen_US
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