More Like this

1. Multiple Ocean Equilibria and Decoupling of Miocene Atmospheric pCO ₂ and Regional Temperatures

   https://doi.org/10.1029/2025PA005126  

   Lee, Daeun; Sarr, Anta‐Clarisse; Acosta, R Paul; Poulsen, Christopher J (May 2025, Paleoceanography and Paleoclimatology)

   Abstract During the Middle Miocene Climate Transition (MMCT; ∼14.7–13.8 Ma), the global climate experienced rapid cooling, leading to modern‐like temperatures, precipitation patterns, and permanent ice sheets. However, proxy records indicate that atmospheric pCO₂and regional climate conditions (SST, ice volume) were highly variable from 17 to 12.5 Ma and these changes were not always synchronous. Here, we report on a series of middle Miocene (∼16–12.5 Ma) simulations using the water isotope enabled earth system model (iCESM1.2) to explore the potential for multiple equilibrium states to explain the observed decoupling between pCO₂and regional climates. Our simulations indicate that initial ocean conditions can significantly influence deep water formation in the North Atlantic and lead to multiple ocean equilibria. When the model is initiated from a cold state, residual cool surface water temperatures in the North Atlantic intensify Atlantic Meridional Ocean Circulation (AMOC) and inhibit Arctic sea‐ice formation. When initiated from a warm state, the AMOC remains weak. The different ocean states drive differences in equator‐to‐pole sea surface temperature gradients and sea ice distributions through heat redistribution changes. These equilibria cause variations in temperature gradients and sea ice distribution due to changes in heat redistribution. Additionally, changes in ocean circulation and a reduced temperature gradient in the North Atlantic increase North Atlantic precipitation when the AMOC is strong. These findings underscore the importance of the ocean's initial state in shaping regional climate responses to atmospheric pCO₂, potentially explaining regional climate pattern variability observed during the Miocene. 

   more » « less
2. Short-term and seasonal pH, p CO ₂ and saturation state variability in a coral-reef ecosystem: CORAL REEF pCO ₂ , pH, SATURATION STATES

   https://doi.org/10.1029/2011GB004114  

   Gray, Sarah E.; DeGrandpre, Michael D.; Langdon, Chris; Corredor, Jorge E. (September 2012, Global Biogeochemical Cycles)
3. Dynamics of benthic metabolism, O ₂ , and pCO ₂ in a temperate seagrass meadow: Seagrass metabolism, O ₂ , and pCO ₂ dynamics

   https://doi.org/10.1002/lno.11236  

   Berg, Peter; Delgard, Marie Lise; Polsenaere, Pierre; McGlathery, Karen J.; Doney, Scott C.; Berger, Amelie C. (January 2019, Limnology and Oceanography)
4. Drawdown of Atmospheric pCO ₂ Via Variable Particle Flux Stoichiometry in the Ocean Twilight Zone

   https://doi.org/10.1029/2021GL094924  

   Tanioka, Tatsuro; Matsumoto, Katsumi; Lomas, Michael W. (November 2021, Geophysical Research Letters)
5. Explicit Physical Knowledge in Machine Learning for Ocean Carbon Flux Reconstruction: The pCO ₂ ‐Residual Method

   https://doi.org/10.1029/2021MS002960  

   Bennington, Val; Galjanic, Tomislav; McKinley, Galen A. (October 2022, Journal of Advances in Modeling Earth Systems)