Fritsen, C. H. Desert Research Institute, email@example.com
Adams, E. H. Montana State University, firstname.lastname@example.org
Edens, M. Q. Montana State University, email@example.com
Priscu, J. C. Montana State University, firstname.lastname@example.org
LIGHT-FOCUSING IN ASSOCIATION WITH SMALL-SCALE STRUCTURES IN FRESHWATER AND SALINE ICE COVERS
Radiative energy transfer within freshwater and saline ice covers influences heat and mass balance processes, liquid water availability as well as photoautotrophic processes. We have recently been evaluating small-scale (cm to m) physical structures within sea ice and freshwater ice covers to determine if they are conducive for enhancing localized trapping or focusing of radiant energy. First-order evaluations of brine drainage networks in sea ice indicates that brine-filled tubes are not highly conducive for light trapping or focusing, even though enhanced irradiances are often observed in association with these structures. Rather, enhanced light-levels and transmission are primarily due to the absence of ice and associated pigmented microalgae. Vapor-filled cylindrical tubes in freshwater ice covers have more of a capacity for light focusing and are thought to enhance localized fluxes of radiant energy. Radiative energy transfer, heat dissipation and microalgal photometabolism processes will have to be evaluated at proper scales to determine if such enhanced irradiance regimes have appreciable consequences for either small-scale or wide-spread physical or biological processes.
Day: Tuesday, Feb. 2
Location: Sweeney Center