noaa-model-18719 Global Ocean Tidal Energy Dissipation Model Data for the Present and Last Glacial Maximum Schmittner, A.; Green, J.A.M.; Wilmes, S.-B. Global Ocean Tidal Energy Dissipation Model Data for the Present and Last Glacial Maximum 2015-05-22 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18719 Investigator A. Schmittner Investigator J.A.M. Green Investigator S.-B. Wilmes earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt per square meter,null,paleoclimatic modeling,null,null,N,sum of M2 S2 K1 and O1 earth science paleoclimate paleoclimatic modeling surface type,null,null,dimensionless,null,paleoclimatic modeling,null,null,N,land mask earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt per square meter,null,paleoclimatic modeling,null,null,N,M2 earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt,null,paleoclimatic modeling,null,null,N,for depths > 500m; K1 earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt per square meter,null,paleoclimatic modeling,null,null,N,K1 earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt,null,paleoclimatic modeling,null,null,N,for depths > 500m; M2 earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt,null,paleoclimatic modeling,null,null,N,for depths > 500m; O1 earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt per square meter,null,paleoclimatic modeling,null,null,N,S2 earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt,null,paleoclimatic modeling,null,null,N,for depths > 500m; sum of M2 S2 K1 and O1 earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt,null,paleoclimatic modeling,null,null,N,for depths > 500m; S2 earth science paleoclimate paleoclimatic modeling kinetic energy dissipation,null,null,watt per square meter,null,paleoclimatic modeling,null,null,N,O1 earth science paleoclimate model ocean model geoscientificInformation Last Glacial Maximum 21000 cal yr BP 0 cal yr BP Complete -90 90 -180 180 Geographic Region Global Global>LATITUDE >LONGITUDE None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Schmittner, A., J.A.M. Green, and S.-B. Wilmes 2015 Geophysical Research Letters 42 10.1002/2015GL063561

Due to lower sea levels during the Last Glacial Maximum (LGM), tidal energy dissipation was shifted from the shallow margins into the deep ocean. Here using a high-resolution tide model, we estimate that global energy fluxes below 200?m depth were almost quadrupled during the LGM. Applying the energy fluxes to a consistent tidal mixing parameterization of a global climate model results in a large intensification of mixing. Global mean vertical diffusivity increases by more than a factor of 3, and consequently, the simulated meridional overturning circulation accelerates by ~21–46%. In the model, these effects are at least as important as those from changes in surface boundary conditions. Our findings contrast with the prevailing view that the abyssal LGM circulation was more sluggish. We conclude that changes in tidal mixing are an important mechanism that may have strongly increased the glacial deep ocean circulation and should no longer be neglected in paleoclimate simulations. STUDY NOTES: This dataset includes three directories: 1) orig/ includes the original netcdf datafiles from the tide model and files used to convert them to ascii output. Contains tidal dissipation files including only IT drag obtained from Sophie-Bernice Wilmes dissipation_00.0kyrBP_ITfricPD_I0.02_191556.nc dissipation_21.0kyrBP_ITfricLGM0_I0.02_583323.nc First used ferret and the script read_diss_ITfric.jnl to produce the files ITfric*inverse*.txt. Then I used the fortran program flip_lat.f to produce the files ITfric*.txt. Next I used make_diss.jnl to produce the diss.nc files in the pd/ and lgm/ directories. Appropriate lines in the scripts and fortran code need to be commented out. 2) pd/ includes the present day data averaging on the UVic model grid including sub-gridscale bathymetry 3) lgm/ as for pd/ but for LGM data

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/schmittner2015/schmittner2015.txt Formatted Text File; Study Description GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/schmittner2015/ Data Folder; Data and Supporting Code USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11