Publication Date:
2012-03-17
Description:
Dimethylsulfide (DMS) eddy correlation air/sea fluxes and gradients were measured aboard the R/V Knorr in January 2006 (Knorr_06). The cruise took place in the Eastern Pacific Ocean, from Manzanillo, Mexico to Punta Arenas, Chile. Atmospheric pressure chemical ionization mass spectrometry was used to measure DMS in air and in air equilibrated with surface seawater using a membrane equilibrator. Gas transfer coefficients (kDMS) computed from the data exhibit a linear dependence on wind speed, over the wind speed range from 1 to 9 m s-1. The k vs U relationship from this study is compared to the results of previous eddy covariance and dual tracer studies and to the NOAA/COARE gas transfer model. The Knorr_06 k values are in good agreement with those derived from earlier DMS flux studies, but differ significantly from prior CO2 data at low wind speeds. The NOAA/COARE model tends to underpredict the wind speed-dependence of kDMS observed on this and previous DMS-based field studies
Type:
Conference or Workshop Item
,
NonPeerReviewed
