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<p class="MsoNormal">Hello Emily,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For ECCO V4r4, it is possible to estimate TFLUX using monthly averaged fields. Below is a brief description about how to do it. An example of Jupyter notebook is attached for your reference.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">TFLUX = (EXFhs + EXFhl - EXFlwnet - EXFswnet + (TFLUX - oceQnet)) * (1-SIarea) + Other<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">- TFLUX: Rate of change of ocean heat content per m2 accounting for mass fluxes, >0 increase THETA
<o:p></o:p></p>
<p class="MsoNormal">- EXFhs: Open ocean air-sea sensible heat flux, >0 increases THETA<o:p></o:p></p>
<p class="MsoNormal">- EXFhl: Open ocean air-sea latent heat flux, >0 increases THETA<o:p></o:p></p>
<p class="MsoNormal">- EXFlwnet: Net open ocean longwave radiative flux, >0 decreases THETA<o:p></o:p></p>
<p class="MsoNormal">- EXFswnet: Net open ocean shortwave radiative flux, >0 decreases THETA<o:p></o:p></p>
<p class="MsoNormal">- (TFLUX - oceQnet): Implied heat flux due to added mass, >0 increases THETA<o:p></o:p></p>
<p class="MsoNormal">- SIarea: Sea-ice concentration<o:p></o:p></p>
<p class="MsoNormal">- Other = (turbulent + conductive fluxes between ocean and sea-ice + penetrative shortwave flux thru sea-ice and residual due to using values averaged over a period longer than one time step). ECCO V4r4 does not save the terms on the right-hand
side separately. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">All terms except for SIarea (dimensionless) are in Wm-2.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Although it depends what time scales you are interested in, using monthly averages for the estimate is a good approximation. We may lose some precision along ice edges. Using daily means would likely help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best,<o:p></o:p></p>
<p class="MsoNormal">Ou Wang <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">ecco-support <ecco-support-bounces@mit.edu> on behalf of Emily E. Hayden <haydenem@oregonstate.edu><br>
<b>Date: </b>Thursday, September 29, 2022 at 5:32 AM<br>
<b>To: </b>ecco-support@mit.edu <ecco-support@mit.edu><br>
<b>Subject: </b>[EXTERNAL] [ecco-support] ECCO V4r4: Components of TFLUX<o:p></o:p></span></p>
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<p class="MsoNormal">Good afternoon,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I am working with ECCO to compute a mixed layer heat budget and its anomalies in the subpolar North Pacific, and I would like to assess what component of the total heat flux drives the majority of the observed surface forcing anomalies.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">To do this, I would like to access each term that contributes to TFLUX. At this point, I believe I need EXFlh, EXFsh, EXFswnet, EXFlwnet, and oceFWflux; however, I am unsure if this covers all of the components. In particular, I think I
still need the turbulent and conductive fluxes between the ocean and sea-ice/snow, but I am having trouble determining what these fields are called in the ECCO output files. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Is it possible to estimate TFLUX using monthly averaged fields of its components? If so, what fields do I need to do so?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thank you!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best,<o:p></o:p></p>
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<p class="MsoNormal"><span style="color:black">--------<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Emily E. Hayden<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Ph.D. Student | College of Earth, Ocean, and Atmospheric Sciences<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">National Defense Science and Engineering Graduate Fellow <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><a href="mailto:haydenem@oregonstate.edu">haydenem@oregonstate.edu</a><o:p></o:p></span></p>
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