A uniform <i>p</i>CO<sub>2</sub> climatology combining open and coastal oceans
<p>In this study, we present the first combined open- and coastal-ocean <span class="inline-formula"><i>p</i>CO<sub>2</sub></span> mapped monthly climatology (<span class="cit" id="xref_altparen.1"><a href="#bib1.b...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2020-10-01
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| Series: | Earth System Science Data |
| Online Access: | https://essd.copernicus.org/articles/12/2537/2020/essd-12-2537-2020.pdf |
| Summary: | <p>In this study, we present the first combined open- and coastal-ocean <span class="inline-formula"><i>p</i>CO<sub>2</sub></span> mapped monthly climatology (<span class="cit" id="xref_altparen.1"><a href="#bib1.bibx27">Landschützer et al.</a>, <a href="#bib1.bibx27">2020</a><a href="#bib1.bibx27">b</a></span>, <a href="https://doi.org/10.25921/qb25-f418">https://doi.org/10.25921/qb25-f418</a>, <span class="uri">https://www.nodc.noaa.gov/ocads/oceans/MPI-ULB-SOM_FFN_clim.html</span>, last access: 8 April 2020) constructed from observations collected between 1998 and 2015 extracted from the Surface Ocean <span class="inline-formula">CO<sub>2</sub></span> Atlas (SOCAT) database. We combine two neural network-based <span class="inline-formula"><i>p</i>CO<sub>2</sub></span> products, one from the open ocean and the other from the coastal ocean, and investigate their consistency along their common overlap areas. While the difference between open- and coastal-ocean estimates along the overlap area increases with latitude, it remains close to 0 <span class="inline-formula">µatm</span> globally. Stronger discrepancies, however, exist on the regional level resulting in differences that exceed 10 % of the climatological mean <span class="inline-formula"><i>p</i>CO<sub>2</sub></span>, or an order of magnitude larger than the uncertainty from state-of-the-art measurements. This also illustrates the potential of such an analysis to highlight where we lack a good representation of the aquatic continuum and future research should be dedicated. A regional analysis further shows that the seasonal carbon dynamics at the coast–open interface are well represented in our climatology. While our combined product is only a first step towards a true representation of both the open-ocean and the coastal-ocean air–sea <span class="inline-formula">CO<sub>2</sub></span> flux in marine carbon budgets, we show it is a feasible task and the present data product already constitutes a valuable tool to investigate and quantify the dynamics of the air–sea <span class="inline-formula">CO<sub>2</sub></span> exchange consistently for oceanic regions regardless of its distance to the coast.</p> |
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| ISSN: | 1866-3508 1866-3516 |