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<p class="MsoNormal"><span style="font-size:11.0pt">Dear all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I am working on a fully-coupled configuration with an interactive carbon cycle. To do so, I set the parameter “<i>aim_select_pCO2=3</i>” in the file
<i>data.aimphys</i> (attached).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The problem is that the total carbon I calculated have almost linear decreasing trends, and different experiments have different decreasing rates. The figure is also attached. I would expect some numerical
noise but there should not be any trends in this figure. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">My approach to calculate total carbon inventory in the model is:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;color:#0070C0">Total carbon = atmospheric carbon + total DIC + organic carbon<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Specifically, <o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;color:#0070C0">atmospheric carbon = pCO2 * 1E-6 * total_atmos_moles
<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt">where pCO2 is taken from “<i>aim_pCO2_ave</i>” in
<i>pCO2StDiag.*</i>, in ppm, and “<i>total_atmos_moles</i>” is 1.77E20.<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;color:#0070C0">total DIC = DIC * ocean volume<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt">where DIC is diagnosed from “<i>TRAC01_ave</i>” in
<i>BioStDiag.*</i>, in mol C/m^3, and ocean volume is from “<i>TRAC01_vol</i>” in
<i>BioStDiag</i>.*, in m^3.<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;color:#0070C0">organic carbon = R_cp * DOP * ocean volume<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt">where R_cp = 117, and DOP is taken from “<i>TRAC04_ave</i>” in
<i>BioStDiag.*</i>, in mol P/m^3.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Did I do it wrong? Are there any carbon sinks that I have not been aware of?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thank you so much in advance!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Fangze<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">-------------------------------------------------------------------------<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Georgia",serif">Fangze Zhu<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman",serif">PhD student | Teaching Assistant<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman",serif">Department of Atmospheric & Environmental Sciences<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman",serif">University at Albany, SUNY<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman",serif">Office: ES 309<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman",serif"><a href="mailto:fzhu@albany.edu"><span style="color:#0563C1">fzhu@albany.edu</span></a></span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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