edu.ucar.opensky::articles:25831 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T22:44:55.466691 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d72r3wgh https://doi.org/10.5065/D6RX99HX https Related Service #1 Cheyenne: SGI ICE XA Cluster https://doi.org/10.5281/zenodo.5932697 https Related Software #1 Analysis and visualisation software for "Simulation and scaling of the turbulent vertical heat transport and deep-cycle turbulence across the equatorial Pacific cold tongue" Simulation and scaling of the turbulent vertical heat transport and deep-cycle turbulence across the equatorial Pacific cold tongue 2022-05-01T00:00:00Z publication https://n2t.org/ark:/85065/d72r3wgh https://doi.org/10.1175/JPO-D-21-0153.1 Whitt, Daniel author Cherian, Deepak author Holmes, R. M. author Bachman, Scott author Lien, R. author Large, William G. author Moum, J. N. author UCAR/NCAR - Library publisher Microstructure observations in the Pacific cold tongue reveal that turbulence often penetrates into the thermocline, producing hundreds of watts per square meter of downward heat transport during nighttime and early morning. However, virtually all observations of this deep-cycle turbulence (DCT) are from 0 degrees, 140 degrees W. Here, a hierarchy of ocean process simulations, including submesoscale-permitting regional models and turbulence-permitting large-eddy simulations (LES) embedded in a regional model, provide insight into mixing and DCT at and beyond 0 degrees, 140 degrees W. A regional hindcast quantifies the spatiotemporal variability of subsurface turbulent heat fluxes throughout the cold tongue from 1999 to 2016. Mean subsurface turbulent fluxes are strongest (similar to 100 W m(-2)) within 2 degrees of the equator, slightly (similar to 10 W m(-2)) stronger in the northern than Southern Hemisphere throughout the cold tongue, and correlated with surface heat fluxes (r(2) = 0.7). The seasonal cycle of the subsurface heat flux, which does not covary with the surface heat flux, ranges from 150 W m(-2) near the equator to 30 and 10 W m(-2) at 4 degrees N and 4 degrees S, respectively. Aseasonal variability of the subsurface heat flux is logarithmically distributed, covaries spatially with the time-mean flux, and is highlighted in 34-day LES of boreal autumn at 0 degrees and 3 degrees N, 140 degrees W. Intense DCT occurs frequently above the undercurrent at 0 degrees and intermittently at 3 degrees N. Daily mean heat fluxes scale with the bulk vertical shear and the wind stress, which together explain similar to 90% of the daily variance across both LES. Observational validation of the scaling at 0 degrees, 140 degrees W is encouraging, but observations beyond 0 degrees, 140 degrees W are needed to facilitate refinement of mixing parameterization in ocean models. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2022 American Meteorological Society (AMS). None eng geoscientificInformation