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   https://doi.org/10.1002/2017JC012853  

   DeJong, Hans B. ; Dunbar, Robert B. ( October 2017 , Journal of Geophysical Research: Oceans)
2. Oxygen in the Southern Ocean From Argo Floats: Determination of Processes Driving Air-Sea Fluxes: SOUTHERN OCEAN ARGO O 2 AIR-SEA FLUXES

   https://doi.org/10.1002/2017JC012923  

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3. Rising methane emissions from northern wetlands associated with sea ice decline: Higher CH 4 Emissions and Sea Ice Retreat

   https://doi.org/10.1002/2015GL065013  

   Parmentier, Frans-Jan W. ; Zhang, Wenxin ; Mi, Yanjiao ; Zhu, Xudong ; van Huissteden, Jacobus ; Hayes, Daniel J. ; Zhuang, Qianlai ; Christensen, Torben R. ; McGuire, A. David ( September 2015 , Geophysical Research Letters)
4. Impacts of Paleoecology on the TEX 86 Sea Surface Temperature Proxy in the Pliocene‐Pleistocene Mediterranean Sea

   https://doi.org/10.1029/2018PA003494  

   Polik, Catherine A. ; Elling, Felix J. ; Pearson, Ann ( December 2018 , Paleoceanography and Paleoclimatology)

   The TEX₈₆proxy, based on the distribution of isoprenoid glycerol dialkyl glycerol tetraethers (iGDGTs) from planktonic Thaumarchaeota, is widely used to reconstruct sea surface temperature (SST). Recent observations of species‐specific and regionally dependent TEX₈₆‐SST relationships in cultures and the modern ocean raise the question of whether nonthermal factors may have impacted TEX₈₆paleorecords. Here we evaluate the effects of ecological changes on TEX₈₆using one Pliocene and two Pleistocene sapropels from the Mediterranean Sea. We find that TEX₈₆‐derived SSTs deviate from‐derived SSTs before, during, and after each sapropel event.‐derived SSTs vary by less than 6 °C, while TEX₈₆‐derived SSTs vary by up to 15 °C within a single record. Compound‐specific carbon isotope compositions indicate minimal confounding influence on TEX₈₆from exogenous sources. Some of the variation can be accounted for by changes in nitrogen cycling intensity affecting thaumarchaeal iGDGT biosynthesis, as demonstrated by an inverse relationship between TEX₈₆and δ¹⁵N_TN. TEX₈₆‐derived SSTs also consistently show warm anomalies in the Pleistocene, while the Pliocene samples exhibit both warmer and cooler relative offsets. These anomalies result from systematic differences between Plio‐Pleistocene iGDGT distributions and both modern Mediterranean and modern, globally distributed core top samples. Through characteristic GDGT distributions, we suggest the existence of three distinct endemic populations of Thaumarchaeota in the Pliocene, Pleistocene, and modern Mediterranean Sea, respectively. Importantly, these communities prevailed during both sapropel and oligotrophic conditions. Our results demonstrate that ecological and community‐specific effects must be considered when applying the TEX₈₆proxy to paleorecords.

    

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5. Atmospheric CO 2 and Sea Surface Temperature Variability Cannot Explain Recent Decadal Variability of the Ocean CO 2 Sink

   https://doi.org/10.1029/2021GL096018  

   DeVries, Tim ( April 2022 , Geophysical Research Letters)

   The ocean is one of the most important sinks for anthropogenic CO₂emissions. Here, I use an ocean circulation inverse model (OCIM), ocean biogeochemical models, and pCO₂interpolation products to examine trends and variability in the oceanic CO₂sink. The OCIM quantifies the impacts of rising atmospheric CO₂, changing sea surface temperatures, and gas transfer velocities on the oceanic CO₂sink. Together, these effects account for an oceanic CO₂uptake of 2.2 ± 0.1 PgC yr⁻¹from 1994 to 2007, and a net increase in the oceanic carbon inventory of 185 PgC from 1780 to 2020. However, these effects cannot account for the majority of the decadal variability shown in data‐based reconstructions of the ocean CO₂sink over the past 30 years. This implies that decadal variability of the ocean CO₂sink is predominantly driven by changes in ocean circulation or biology that act to redistribute both natural and anthropogenic carbon in the ocean.

    

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