Global Ocean Tidal Energy Dissipation Model Data for the Present and Last Glacial Maximum Schmittner, A.; Green, J.A.M.; Wilmes, S.-B. Schmittner, A. Green, J.A.M. Wilmes, S.-B. Last Glacial Maximum 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 (Global>LATITUDE >LONGITUDE ) 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 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Schmittner, A. Investigator : Green, J.A.M. Investigator : Wilmes, S.-B. 2015-05-22 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/18719 https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/schmittner2015/schmittner2015.txt https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/schmittner2015/ https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/schmittner2015/schmittner2015.txt https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/schmittner2015/ English https://www.ncdc.noaa.gov/paleo/study/18719 https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/schmittner2015/schmittner2015.txt https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/schmittner2015/ Schmittner, A., J.A.M. Green, and S.-B. Wilmes2015Glacial ocean overturning intensified by tidal mixing in a global circulation modelGeophysical Research Letters4210.1002/2015GL063561 START YEAR: 21000 cal yr BP * END YEAR: 0 cal yr BP -180 -90 180 90