<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Dear All,<div><br></div><div>this message is intended for those of you who may have already run ECCO version 4 release 2 </div><div>which is the reference 20 year 1992-2011 solution on the LLC90 grid that I intend to maintain </div><div>compatible with the up to date MITgcm code for the foreseeable future. </div><div><br></div><div>Before getting into ECCOv4r2 in more details I should mention that other ECCO v4 solutions </div><div>that we plan to release in the future will be announced via <a href="http://ecco-group.org/">http://ecco-group.org/</a> where </div><div>everything below is already cross referenced (see the “model” and “products” tabs).</div><div><br></div><div>General information about the LLC90 grid, ECCO v4 setup, and solutions is provided in the </div><div>Forget et al 2015 GMD paper (references incl. below) and details by which release 2 differs </div><div>from the original release 1 solution are reported in the Forget et al 2016 document. </div><div><br></div><div>Directions to re-run the 20 year ECCOv4r2 solution are provided in eccov4.pdf @</div><div><a href="http://mitgcm.org/viewvc/*checkout*/MITgcm/MITgcm_contrib/gael/verification/eccov4.pdf">http://mitgcm.org/viewvc/*checkout*/MITgcm/MITgcm_contrib/gael/verification/eccov4.pdf</a></div><div><br></div><div>The relevant code and input directories needed to re-run the 20 year ECCOv4r2 solution are in </div><div><a href="http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/">http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/</a></div><div><br></div><div>I have re-organized things recently to avoid confusion with the LLC90 short regression tests (now </div><div>in <a href="http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/verification_other/global_oce_llc90/">http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/verification_other/global_oce_llc90/</a>) which </div><div>I have set up to run daily on “glacier” in order to ensure continued compatibility (results are </div><div>posted @ <a href="http://mitgcm.org/public/testing.html">http://mitgcm.org/public/testing.html</a>; see post scriptum for a bit more detail).</div><div><br></div><div><div>All of the necessary inputs and reference output for ECCOv4r2 are freely available @</div><div><a href="ftp://mit.ecco-group.org/ecco_for_las/version_4/release2/">ftp://mit.ecco-group.org/ecco_for_las/version_4/release2/</a></div><div>where the top-level README explains the directory structure and included contents. </div><div><br></div><div>The various datasets distributed via the MIT ftp server are also permanently archived @</div><div><a href="https://dataverse.harvard.edu/dataverse/ECCOv4r2">https://dataverse.harvard.edu/dataverse/ECCOv4r2</a></div><div><a href="https://dataverse.harvard.edu/dataverse/ECCOv4r2inputs">https://dataverse.harvard.edu/dataverse/ECCOv4r2inputs</a></div></div><div>which is not yet really practical as a data server but readily provides DOIs for the </div><div>various datasets that you may be required for publications in scientific journals.</div><div><br></div><div>Since a number of people have already re-run ECCOv4r2 (and a new user did last week)</div><div>I have good hope that you will find it very easy to follow the directions in <a href="http://mitgcm.org/viewvc/*checkout*/MITgcm/MITgcm_contrib/gael/verification/eccov4.pdf">eccov4.pdf</a> </div><div><br></div><div>If you experience any difficulty please address questions or requests for additional </div><div>guidance to either <a href="mailto:mitgcm-support@mitgcm.org">mitgcm-support@mitgcm.org</a> or <a href="mailto:ecco-support@mit.edu">ecco-support@mit.edu</a></div><div><br></div><div>Cheers,</div><div>Gael</div><div><br></div><div><div>*** references:</div><div><br></div><div><div>Forget, G., Campin, J.-M., Heimbach, P., Hill, C. N., Ponte, R. M., and Wunsch, C.: </div><div>ECCO version 4: an integrated framework for non-linear inverse modeling and global </div><div>ocean state estimation, Geosci. Model Dev., 8, 3071-3104, doi:10.5194/gmd-8-3071-2015, 2015</div></div><div><br></div><div><div style="margin: 0px; font-size: 11px;"><span style="letter-spacing: 0px;">Forget, G., J.-M. Campin, P. Heimbach, C. N. Hill, R. M. Ponte, and C. Wunsch, 2016: </span></div><div style="margin: 0px; font-size: 11px;"><span style="letter-spacing: 0px;">ECCO version 4: Second Release, <span style="letter-spacing: 0px;"><a href="http://hdl.handle.net/1721.1/102062">http://hdl.handle.net/1721.1/102062</a></span></span></div></div><br></div><div>*** post scriptum: </div><div><br></div><div>It used to be that the reference 20 solution as well as the LLC90 short regression tests were all </div><div>together inside <a href="http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/global_oce_llc90/">http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/global_oce_llc90/</a> </div><div><br></div><div>Since this has been known to induce confusion I have recently separated them such that </div><div>1) <a href="http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/">http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/</a></div><div> now contains only the code, input, etc directories associated with the 20 year ECCOv4r2 solution</div><div>2) <a href="http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/v">http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/verification_other/global_oce_llc90/</a></div><div> now contains only the code, input, etc directories associated with the LLC90 short regression tests</div><div><br></div><div>It may be useful to stress that the latter (i.e. verification_other/global_oce_llc90/) is not meant to run </div><div>for more than a few time steps and DOES NOT include inputs that would be needed to do long runs.</div><div><br></div></body></html>