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<div class="moz-cite-prefix">On 4/17/18 7:31 AM, Lei Chen wrote:<br>
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<blockquote type="cite"
cite="mid:25C72364-B3D4-43CF-9E57-6968C3B76BA5@whoi.edu">
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<div><span>Hi,</span></div>
<div><span><br>
</span></div>
<div><span> Thank you for your effort for the data. It
helps a lot in research. </span></div>
<div><span> When I was using the data, I came across a
little question: I want to use the bottom pressure of ECCO4
data, and I found a variable named 'PHIBOT' in the
interp_monthly folder. I just wonder what is the meaning of
'anomaly' in the description of this variable? ( it says '</span><span style="orphans: 2; white-space: pre-wrap; widows: 2; line-height: 1.6;">Bottom Pressure Pot.(p/rhoConst) Anomaly (m^2/s^2) w.r.t. the product of gravity and </span><span style="line-height: 1.6; orphans: 2; white-space: pre-wrap; widows: 2;">ocean bottom depth. RhoConst is a constant density of 1029 kg/m^3 and gravity 9.81 m/s^2.'</span><span
style="line-height: 1.6;">) Does the anomaly spatial or
temporal? I looked up the 'readme' file and other files but
didn't find the answer. I hope you can help me i </span></div>
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Hi<span style="line-height: 1.6;"> Lei,<br>
</span><span>as it says, "anomaly" is wrt to "g*Depth",<br>
so the total (or absolute) bottom pressure in Pa is<br>
Depth * RhoConst * g + PHIBOT * RhoConst<br>
where "g" is for gravity and "Depth" can be loaded from<br>
nctiles_grid/GRID.*.nc<br>
<blockquote type="cite"> double Depth(i2, i3) ;<br>
Depth:long_name = "sea floor depth" ;<br>
Depth:units = "m" ;<br>
</blockquote>
regards,<br>
Hong<br>
</span>
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