Hill, J. K.. Oregon State University, hillj@ucs.orst.edu
Wheeler, P. K.. Oregon State University, pwheeler@oce.orst.edu

 
VARIATIONS IN CONCENTRATIONS AND C:N RATIOS OF DISSOLVED AND PARTICULATE ORGANIC CARBON AND NITROGEN IN OREGON COASTAL AND OFFSHORE WATER
 
As part of the west coast GLOBEC long term observation program (LTOPS) we have been measuring DOC and DON in coastal and oceanic water off Oregon. Data will be presented for eleven coastal/offshore transects extending from Gray's Harbor, Washington to Cape Blanco, Oregon and a one year time series along the transect off Newport, Oregon. The distribution of particulate and dissolved organic carbon and nitrogen will be compared to physical parameters (temperature and salinity), inorganic nutrients (nitrate and silicate) and chlorophyll to infer some of the major sources and distribution pathways for organic material in the northeast Pacific Ocean. Four distinct regions can be identified from physical, chemical, and biological parameters: the oligotrophic eastward flowing cross-Pacific surface current, the Columbia River plume, a northeast coastal sector with moderate productivity and a southeast coastal sector with high productivity and an offshore coastal jet. The partitioning of particulate and dissolved organic carbon and nitrogen and their C:N ratios will be compared for each of these regions. The time series along the Newport transect will be used to evaluate the effects of seasonal upwelling and phytoplankton blooms.
 
Day: Tuesday, Feb. 2
Time: 08:45 - 09:00am
Location: Eldorado Hotel
 
Code: SS34TU0845E