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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal">I’ve recently set-up and run the flux-forced version of ECCOv4r4 (<a href="https://github.com/ECCO-GROUP/ECCO-v4-Configurations/tree/master/ECCOv4%20Release%204/flux-forced">https://github.com/ECCO-GROUP/ECCO-v4-Configurations/tree/master/ECCOv4%20Release%204/flux-forced</a>),
but some of the forcing variables used by this version do not seem to be documented in the MITgcm manual.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In particular, I am unable to find information on the variable “saltflx” other than a note added here
<a href="http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm/doc/tag-index?revision=1.2291&view=markup&sortby=date&pathrev=checkpoint63">
http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm/doc/tag-index?revision=1.2291&view=markup&sortby=date&pathrev=checkpoint63</a> , and similarly “spflx” which I have believe is a “salt plume flux” in g/m2/s.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a few questions about this configuration:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">What is the difference (other than the units) between sflux and saltflx?<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Why are all three of saltflx, sflux, and spflx necessary for the flux-forced run, as opposed to a single flux variable impacting salinity?<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Similarly, why do we have two heat flux terms (hflux and swflux), the latter of which is entirely contained within the former (hflux = latent + sensible + lwflux + swflux) ? Is this
related to the subsurface penetration of SW fluxes? <o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">The paper Fukumori et al., 2021, JPO (<a href="https://doi.org/10.1175/JPO-D-21-0069.1">https://doi.org/10.1175/JPO-D-21-0069.1</a>), which uses this config, states: “whereas heat
and freshwater fluxes are dependent in the bulk-formula version, the two are independent in the flux-forced version, thus permitting unambiguous determination of their individual effects.” – does independence here refer to the fact that they are not derived
from common quantities (such as specific humidity), rather than being statistically independent, which would suggest they do not covary?<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance for any help with this!<o:p></o:p></p>
<p class="MsoNormal">Best wishes,<o:p></o:p></p>
<p class="MsoNormal">Dafydd<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
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