Table 3. Chl Algorithm Performance From MODIS/Aqua Measurements for Chl <= 0.25 mg m-3, as Gauged by in Situ Chla


Algorithm	RMS	URMS	Mean Ratio	Median Ratio	MRE	R2 (Linear)	R2 (Log)	N

OC3	77.7%	44.2%	1.24	1.05	32.0%	0.42	0.66	63
CI	43.9%	32.7%	1.15	1.04	25.4%	0.62	0.71	63

aMODIS/Aqua Rrs(lambda) were used as the input of all algorithms. URMS, "unbiased" RMS (see text for details); MRE, mean relative error after converting negative errors to positive.