Based on the science of this paper,ΒΆ
Suvarchal, C., and B. E. Mapes, 2018: Cumulus friction in the Asian monsoon of a global model with 7km mesh. Peer-reviewed chapter in INTROSPECT-2016 volume in preparation (Elsevier Press, PDF
these notebooks examine the sign of a quantity called KEdot that summarizes momentum flux (kinetic energy work: upscale or downscale?).
These are readable, documented versions of the fine programming work at https://github.com/suvarchal/G5NR_Interactive_notebooks/tree/master/