Table 3 Fixed model parameters.
From: Permo–Triassic boundary carbon and mercury cycling linked to terrestrial ecosystem collapse
Description | Name | Size at present |
|---|---|---|
Thermohaline speed | \({\mathrm{f}}_{{\mathrm{circ}}}\) | 10 Sv |
Relative area of low-latitude surface ocean | \({\mathrm{A}}_{\mathrm{s}}\) | 0.85 |
Relative area of high-latitude surface ocean | \({\mathrm{A}}_{\mathrm{h}}\) | 0.15 |
Present day moles of atmospheric CO2 | \({\mathrm{M}}_{{\mathrm{atm}}}\) | \(5 \times 10^{16}\) mol C |
Timescale parameter for gas exchange | \(\tau _{{\mathrm{oa}}}\) | 10 years |
Long-term climate sensitivity | \({\mathrm{k}}_{{\mathrm{clim}}}\) | 5 K |
CO2 second dissociation constant | \({\mathrm{K}}_2\) | \(7.4 \times 10^{-10}\) |
Calcium carbonate solubility product | \({\mathrm{K}}_{{\mathrm{sp}}}\) | 0.8 mmol2 kg−2 * |
Present day CaCO3 saturation state | \({\mathrm{\Omega }}_0\) | 3 |
Marine calcium concentration | \([{\mathrm{Ca}}]\) | 10 mM |
Photosynthetic C fractionation | ΔB | 27‰ |
C-isotope composition of carbonates | \(\delta ^{13}{\mathrm{C}}_{\mathrm{C}}\) | 0‰ |
C isotope composition of organics | \(\delta ^{13}{\mathrm{C}}_{\mathrm{G}}\) | −27‰ |
