<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear Mengdie, the drop in sea level probably means that Drake Passage transport has accelerated substantially during the last few years of the simulation.<div class="">My colleague Hong Zhang, cc-ed, has verified that this is indeed what happens in the cube92 simulation.</div><div class="">This drop is almost certainly caused because forcing changes from ERA-interim to JRA-55 in 2009.</div><div class=""><br class=""></div><div class="">What are you trying to study with the cube92 simulation?</div><div class="">How about using ECCO-v4r4: <a href="https://ecco-group.org/products-ECCO-V4r4.htm" class="">https://ecco-group.org/products-ECCO-V4r4.htm</a></div><div class="">or ECCO version5 Alpha: <a href="https://ecco.jpl.nasa.gov/drive/files/Version5/Alpha" class="">https://ecco.jpl.nasa.gov/drive/files/Version5/Alpha</a></div><div class="">instead?</div><div class=""><br class=""></div><div class="">Cheers, Dimitris</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jul 24, 2021, at 2:05 AM, Mengdie Xie <<a href="mailto:mengdie.xie@utas.edu.au" class="">mengdie.xie@utas.edu.au</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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<span style="color:rgb(49, 53, 59);font-family:微软雅黑, Verdana, 'Microsoft Yahei', SimSun, sans-serif;font-size:14px;font-weight:normal;line-height:1.6;orphans:auto;widows:1" class=""><span class="">Hello,</span></span>
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<span class="">Sorry to bother you. I have a question about ECCO2_cube92 SSH(sea surface height) data.</span></div>
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<span class="">The situation is that:</span></div>
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<span style="line-height:1.6" class="">I used </span><span class="">ECCO2_cube92 SSH 3-day data over the period 1996.01-2016.12 to calculate the area average value of Antarctic(50°S-90°S). And </span><font face="微软雅黑, Verdana, Microsoft Yahei, SimSun, sans-serif" style="line-height:1.6" class="">I
drew the time curve of SSH, as shown in the attachment. It shows a rapid decline in a short time.</font></div>
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<font face="微软雅黑, Verdana, Microsoft Yahei, SimSun, sans-serif" style="line-height:1.6" class="">I don't know why it drops so fast in such a short time, I'm not sure if it's reasonable. If it's unreasonable, there may be something wrong in my calculation. Could you
please help me check whether the result is reasonable?</font></div>
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<span style="font-family:Arial;line-height:23.8px" class="">I would appreciate it very much if you could give me some information on this.</span></div>
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<span class="">Best Regards,</span></div>
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<span class="">Mengdie </span></div>
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