J. Ronald et al., VERTICAL STRUCTURE OF PRODUCTIVITY AND ITS VERTICAL INTEGRATION AS DERIVED FROM REMOTELY-SENSED OBSERVATIONS, Limnology and oceanography, 38(7), 1993, pp. 1384-1393
A method for predicting oceanic productivity from remotely sensed diff
use attenuation (488 nm) and surface chlorophyll concentration is pres
ented. The method uses a climatological approach which consists of app
lying a set of regressions for each region and season to yield the dep
th of the chlorophyll maximum, the exponential slope of the chlorophyl
l profile, and the depths of various irradiance levels from the remote
ly sensed diffuse attenuation coefficient at 488 nm. These parameters,
combined with the remotely sensed surface chlorophyll concentration a
nd a model of quantum efficiency vs. irradiance, yield a vertical prof
ile of productivity. This profile can be numerically integrated or dir
ectly integrated piecewise with a logarithmic approximation for the qu
antum efficiency model and a piecewise linear relationship of total ir
radiance and irradiance at 488 nm. The results favorably compare with
productivity profiles calculated from direct measurements of chlorophy
ll and irradiance for a meridional transect of the North Pacific Ocean
.