<div><p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Hi,</span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">I use the MITgcm
model to simulate the transport of microplastics over the global ocean . Wind
affects the drift of microplastics on the sea surface. However, the offline
input files do not include the wind field.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">I calculate the speed
for drift (Udrift and Vdrift) based on UvelFile, VvelFile and wind field data
from ECMWF, e.g. one linear solution is Udrift=Uvel+Uwind*0.01, Vdrift=Vvel+Vwind*0.01.
Then the uFld(:,:,1) and vFld(:,:,1) in ptracers_integrate.F were replaced by Udrift(:,:) and Vdrift(:,:). The results were not very satisfactory.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">I wonder if I changed
the appropriate subroutine? Will the change of uFld and vFld break the
conservation relations? I would be greatly appreciated if you could give some suggestions
on simulating the drift process of microplastics.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Thank you, and I
look forward to hearing from you.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Best wishes<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">Peipei Wu<o:p></o:p></span></p></div>