Title Timing of sea ice formation and exposure to photosynthetically active radiation along the western Antarctic Peninsula
Author Fritsen, C.H.; Memmott, J.C.; Ross, R.M.; Quetin, L.B.; Vernet, M.; Wirthlin, E.D.
Author Affil Fritsen, C.H., Desert Research Institute, Reno, NV. Other: University of California at Santa Barbara; Scripps Institution of Oceanography
Source Polar Biology, 34(5), p.683-692. Publisher: Springer-Verlag, Berlin, Germany. ISSN: 0722-4060
Publication Date May 2011
Notes In English. NSF grants ANT-0529666, ANT-0529087, and ANT-0528728. 36 refs. GeoRef Acc. No: 309883. CRREL Acc. No: 65006924
Index Terms algae; ecology; ice; ice cover; ice cover thickness; photosynthesis; plant ecology; solar radiation; Antarctica-- Antarctic Peninsula; Southern Ocean; annual variations; Antarctic Peninsula; Antarctica; Arthropoda; Crustacea; ice cover distribution; Invertebrata; Mandibulata; photochemistry; Plantae; sea ice; seasonal variations
Abstract Understanding the flow of solar energy into ecosystems is fundamental to understanding ecosystem productivity and dynamics. To gain a better understanding of this fundamental process in the Antarctic winter sea ice, we produced a model that estimates the time-integrated exposure of seasonal Antarctic sea ice to PAR through the use of remotely sensed sea ice concentrations, sea ice movement and spatially distributed PAR calculations that account for cloud cover and have applied this model over the past three decades. The resulting spatially distributed estimates of sea ice exposure to PAR by mid-winter are evaluated in context of changes in the timing of sea ice formation that have been documented along the Western Antarctic Peninsula (WAP) region and its potential effects on the variation (seasonal and inter- annual) in the accumulation of sea ice algae in this region. The analysis shows the ice pack is likely to have large inter-annual variations (10-100 fold) in productivity throughout the autumn to winter transition in the sea ice along the WAP. Moreover, the pack ice is likely to have spatial structure in regards to biological processes that cannot be determined from analysis of sea ice concentration information alone. The resulting inter-annual variations in winter processes are likely to affect the dynamics of Antarctic krill (Euphausia superba).
URL http://hdl.handle.net/10.1007/s00300-010-0924-7
Publication Type journal article
Record ID 91542