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3 results for “CO2 outgassing”
Data used in "Storms drive outgassing of CO2 in the Subpolar Southern Ocean"
<p><strong>Description: </strong></p> <p>The data included in this repository were used to generate the analysis and resulting figures for the paper "Storms drive outgassing of CO<sub>2</sub> in the subpolar Southern Ocean" in Nature Communications.</p> <p>Abstract:</p> <p>"The subpolar Southern Ocean is a critical region where CO<sub>2</sub> outgassing influences the global mean air-sea CO<sub>2</sub> flux (F<sub>CO2</sub>). However, the processes controlling the outgassing remain elusive. We show, using an unprecedented multi-glider dataset combining F<sub>CO2</sub> and ocean turbulence, that the air-sea gradient of CO2 (∆pCO<sub>2</sub>) is modulated by synoptic storm-driven ocean variability (20 µatm, 1-10 days) through two processes. Ekman transport explains 60% of the variability, and entrainment drives strong episodic CO<sub>2</sub> outgassing events of 2-4 mol m<sup>-2</sup> yr<sup>-1</sup>. Extrapolation across the subpolar Southern Ocean using a process model shows how ocean fronts spatially modulate synoptic variability in ∆pCO<sub>2</sub> (6 µatm<sup>2</sup> average) and how spatial variations in stratification influence synoptic entrainment of deeper carbon into the mixed layer (3.5 mol m<sup>-2</sup> yr<sup>-1</sup> average). These results not only constrain aliased-driven uncertainties in F<sub>CO2</sub> but also the effects of synoptic variability on slower seasonal or longer ocean physics-carbon dynamics."</p> <p>In this study, we first use a two-month dataset from the Southern Ocean Seasonal Cycle Experiment (SOSCEx) which utilised multiple autonomous platforms to simultaneously observe the coupled atmosphere - ocean system, in high-resolution, in the Atlantic sector of the subpolar Southern Ocean. Corresponding processed data for this experiment used by this study is provided in the folder /Data/SOSCEx_STORM2_Glider_Data.</p> <p>Using these data we explain how storms influence, through ocean mixed layer physics (advection and mixing), the direction and magnitude of the air-sea CO<sub>2 </sub>gradient (∆pCO<sub>2</sub>) and flux (F<sub>CO2</sub>) over the duration of the experiment. We construct a conceptual ocean mixed layer model that captures the observed synoptic variability of ∆pCO<sub>2</sub> in the observations, we estimate the synoptic variability around the entire subpolar Southern Ocean. The relating data for this second step can be found under /Data/Generalisation</p> <p><strong>Related code:</strong></p> <p>The data files provided are those that are required to create the figures for this study and/or perform key analyses. Each figure or analysis has an associated python script. Auxiliary data that are not provided in this repository are available in other public repositories and have been referred to in the main study manuscript and in each of the python scripts where they are used. The python scripts for this study are found at the corresponding authors GitHub at <a href="https://github.com/sarahnicholson/SouthernOceanStormsCO2">https://github.com/sarahnicholson/SouthernOceanStormsCO2</a>.</p>
New data for Dai, Y., Yu, J., Ren, H. et al. Deglacial Subantarctic CO2 outgassing driven by a weakened solubility pump. Nat Commun 13, 5193 (2022)
<p>This repository contains new data reported in the article entitled "Deglacial Subantarctic CO<sub>2</sub> outgassing driven by a weakened solubility pump" in Nature Communications by Dai et al.</p> <p>File d11B MgCa.txt contains boron isotope and Mg/Ca data in planktic foraminifera <em>G. bulloides</em> at site MD97-2106.</p> <p>File d15N.txt contains nitrogen isotope data in planktic foraminifera <em>G. bulloides</em> at site MD97-2106.</p>
Data for manuscript "Suppression of CO2 outgassing by gas bubbles under a hurricane"
<p>Matlab data files containing data used to plot figures in the manuscript "Suppression of CO2 outgassing by gas bubbles under a hurricane"</p>
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