Estimation of Partial Pressure of CO2 (pCO2) Around Mount Krakatau waters, Sunda Straits, Indonesia

Susanna Nurdjaman

doi:10.51200/bjomsa.v5i1.2711

Authors

Susanna Nurdjaman Institut Teknologi Bandung

DOI:

https://doi.org/10.51200/bjomsa.v5i1.2711

Keywords:

Partial Carbon dioxide (pCO2), Temperature, Salinity, Chlorophyll-a, Multivariate Polynomial Regressions

Abstract

The study aimed to develop the formula and validation the value of oceanic carbon dioxide partial pressure (pCO₂_sea) around Krakatau Waters in the Sunda Strait using parameters such as sea surface temperature (SST), sea surface salinity (SSS), and chlorophyll-a (Chl). Using observation data from different seasons (September 2017 and April 2018) The formulation of the empirical equation by using a multivariate polynomial regression method. The results of the study show that the empirical equation for estimating the pCO₂ sea is as follows: : pCO₂= -472.069+1044.043x log(SST) -435.897xlog(SSS) -5.03xlog (Chl).This formula can be applied for both seasons. The results of the analysis of the T-student test and p-value showed a strong relationship between the SST parameters and pCO₂ with a correlation of 0.91 then followed by salinity with a correlation of -0.82. Whereas chlorophyll-a holds a weak proportion with a correlation of 0.32. The increase in SST accelerates the solubility of CO₂ from atmosphere to the sea thereby increasing CO2 sea concentration and increasing pCO₂_sea. While the increase in salinity and chlorophyll-a only gives a weak effect

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