Table 2.

Measurements of Acetone Concentrations in Surface Seawater and Air-Sea Fluxes^a

Period	Location	Concentration (nM)	Fluxb (ng m−2 s−1)	Reference
Mar 1989	Bahamas	3 – 15c	−2.8 – 1.0*c	Zhou and Mopper [1997]
Oct – Nov 2002	Tropical Atlantic	17.6 ± 8.1	7.8*	Williams et al. [2004]
May -Jul 2004	W. Pacific (mid-latitude)	13.6 ± 3.0	−10.2d, −7.4*	Marandino et al. [2005]
May -Jul 2004	W. Pacific (equatorial)	13.9 ± 11.7	−2.6d, 1.1*	Marandino et al. [2005]
Jun – Jul 2004	North Atlantic	<9.6	———	Hudson et al. [2007]
May – Jun 2005	Norwegian fjord	———	0.21	Sinha et al. [2007]
Jan – Feb 2007	S. Atlantic (bloom)	———	0.67	Taddei et al. [2009]
Jan 2007	S. Atlantic (non-bloom)	———	∼−1.0 – 0.2e	Taddei et al. [2009]
Jul – Aug 2008	Northwest Pacific	19.0 ± 4.4	———	Kameyama et al. [2010]

^aValues are means standard deviation unless otherwise noted.

^bFluxes were either directly measured by eddy covariance or mesocosms, or were inferred from the measured saturation ratios. The latter are indicated by asterisks. Positive fluxes are upward.

^cRanges of concentrations and inferred fluxes. The authors reported a flux of 15.7 ng m⁻² s⁻¹ based on an acetone concentration of 55 nM in the surface micro-layer. We repeated their flux calculations using their measured bulk seawater concentrations.

^dThe authors reported a discrepancy between the fluxes measured by eddy covariance and inferred from saturation ratios. Both are shown here. All measured fluxes were downward, but the range of saturation ratios (0.35–6.5), implied both upward and downward fluxes.

^eTaddei et al. [2009] report “near zero, negative or highly variable low acetone fluxes” in non-bloom conditions. They do not report a mean value for non-bloom conditions, thus a range is given here based on DOY 28 – 30 in Figure 4 of Taddei et al. [2009].