Upwelling Systems? Riley Brady Nicole Lovenduski, Michael Alexander, Michael Jacox, Nicolas Gruber Ocean Sciences Meeting February 15th, 2018 Institute o f Arctic and Alpin e Research INSTAAR
complex and variable carbon dynamics, leading to high rates of CO2 exchange with the atmosphere. Adapted from Pennington et al. 2005 CO2 uptake Offshore Ekman Transport High DIC Low DIC * * * * * * * * Biological Activity
[mol/m2/yr] CO2 fluxes in upwelling systems are characterized by significant internal variability that tends to be larger than the seasonal cycle. Brady et al. 2018, in prep
the coastal oceans and much of the global oceans. This internal variability tends to be larger than the seasonal cycle. Humboldt Current anomalies are modulated by ENSO (R = -0.42). Large reductions in DIC cause anomalous uptake during El Niño.
the coastal oceans and much of the global oceans. This internal variability tends to be larger than the seasonal cycle. Humboldt Current anomalies are modulated by ENSO (R = -0.42). Large reductions in DIC cause anomalous uptake during El Niño. California Current FCO2 anomalies are most prominently driven by the NPGO (R = -0.5). Colder SSTs and smaller negative terms outweigh DIC enhancement to promote anomalous uptake during positive events.
the coastal oceans and much of the global oceans. This internal variability tends to be larger than the seasonal cycle. Humboldt Current anomalies are modulated by ENSO (R = -0.42). Large reductions in DIC cause anomalous uptake during El Niño. California Current FCO2 anomalies are most prominently driven by the NPGO (R = -0.5). Colder SSTs and smaller negative terms outweigh DIC enhancement to promote anomalous uptake during positive events. Canary Current anomalies are associated with the NAO (R = 0.28). A strong Azores High supplies more DIC to the system and intensifies wind stress, causing anomalous outgassing.