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bgc_phi.m
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bgc_phi.m
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function Phi = bgc_phi(Q,Aq_Cq)
%bgc_phi Calculate disequilibrium CT from isocapnic quotient and
% biogeochemical process vector
% === INPUTS ==============================================================
% Q: isocap slope, calculated from bgc_isocap() /
% Aq_Cq: change in [AT CT] due to biogeochemical process / micromol/kg
% === OUTPUTS =============================================================
% Phi: extra change in DIC required to not change pCO2 / micromol/kg
% =========================================================================
% --- Written by Matthew P. Humphreys -------------------------------------
% v1: last updated 2017-06-23
% Citation: Humphreys MP, Daniels CJ, Wolf-Gladrow DA, Tyrrell T, &
% Achterberg EP (2017): "On the influence of marine
% biogeochemical processes over CO2 exchange between the
% atmosphere and ocean", Marine Chemistry, in press,
% doi:10.1016/j.marchem.2017.12.006
% =========================================================================
% Phi
Phi = Aq_Cq(2) - Aq_Cq(1) ./ Q;
end %function bgc_phi