| Summary: | The purpose of these notes is to describe how to perform accurate momentum budget analyses using output from the first release of the Arctic and Subpolar gyre sTate Estimate [ASTE R1 Nguyen et al., JAMES, 2021]. The goal of these analyses is to partition, at the grid-point level, the rate of change of momentum into all of its contributing terms in the momentum equation, such as wind and Coriolis forces, horizontal advection, resolved diffusion of momentum, parameterized diffusion of various kinds, etc. This work was supported by NSF-OPP-1603903, NSF-OPP-1708289, and NSF-OCE-1924546. Additional funding was provided from NASA Physical Oceanography's ECCO project through a JPL/Caltech subcontract. Computing resources were provided by the University of Texas at Austin Texas Advanced Computing Center (TACC) and NASA Advanced Supercomputing Division at the Ames Research Center.
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