Scully, N. M. Dalhousie University, nscully@is.dal.ca
Miller, W. L. Dalhousie University, william.miller@dal.ca
Pinette, A. Dalhousie University, apinette@is2.dal.ca

 
SPATIAL AND TEMPORAL PROPERTIES OF COLOURED DISSOLVED ORGANIC MATTER IN THE NORTH WATER POLYNYA.
 
The UV absorption properties of coloured dissolved organic matter (CDOM) were measured during the NOW Arctic polynya experiment from April to July 1998. Discreet water samples were obtained through the water column at stations along East-West transects between 75 and 79 N and absorption spectra of filtered seawater measured with a spectrophotometer. Preliminary analysis of the data indicate spatial and temporal changes in the spectral properties of CDOM in the NOW polynya. The slope (S), the log-linear spectrum of CDOM, ranged from 0.006 to 0.047 nm-1 (n = 1072) and decreased over the development of the polynya with high S values of ~0.04 nm-1 in April. S values were highest at a centrally located station of the polynya however preliminary analysis did not detect any discernable trends of S over water column depth. Absorption coefficients at 350 nm were generally highest near the surface of the water column and at stations located in the Southern region of the polynya. There was also a significant inverse correlation between S and absorption coefficients at 350 nm. Further in depth analysis will be conducted to elucidate the role of transport processes in influencing the spatial and temporal properties of CDOM in the NOW polynya.
 
Day: Thursday, Feb. 4
Time: 03:45 - 04:00pm
Location: Eldorado Hotel
 
Code: CS61TH0345E