Premium
Using satellite data to estimate partial pressure of CO 2 in the Baltic Sea
Author(s) -
Parard Gaëlle,
Charantonis Anastase Alexandre,
Rutgersson Anna
Publication year - 2016
Publication title -
journal of geophysical research: biogeosciences
Language(s) - English
Resource type - Journals
eISSN - 2169-8961
pISSN - 2169-8953
DOI - 10.1002/2015jg003064
Subject(s) - baltic sea , environmental science , mixed layer , satellite , chlorophyll a , sea surface temperature , partial pressure , climatology , oceanography , geology , chemistry , oxygen , aerospace engineering , engineering , biochemistry , organic chemistry
In this study we focused on estimating the pressure partial of CO 2 ( p CO 2 ) in the entire Baltic Sea which can be considered a coastal area in its entirety. We used the self‐organizing multiple linear output (SOMLO) method to estimate the ocean surface p CO 2 in the Baltic Sea from the remotely sensed sea surface temperature, chlorophyll a , colored dissolved organic matter, net primary production, and mixed‐layer depth. Uncertainties in the estimates include sparsity of in situ data used to train the algorithms, in particular, for some sectors and seasons. For this application we divided the Baltic Sea in four basins. When comparing the results obtained with this division to those obtained in previous studies, we notice a decrease in the root‐mean‐square error (<40 μatm) between the reconstruction of the p CO 2 and their corresponding in situ measurements, as well as an increase of the correlation coefficient (> 0.96) between them. The outputs of this research have a horizontal resolution of 4 km and cover the 1998–2011 period. For the first time, a climatological mean distribution of surface water p CO 2 over the Baltic Sea was calculated based on the SOMLO method with a mean p CO 2 of 368.3 ± 100 μatm, and a range of 234–514 μatm. The seasonal variability is similar throughout the Baltic Sea, being high in winter and low in summer.