ANHA4

ANHA is our acronym for the Arctic and Northern Hemisphere Atlantic configuration of the NEMO model. It covers the entire Arctic and Northern Atlantic Ocean, and a portion of the Southern Atlantic. The ANHA configuration has open boundaries across Bering Strait in the Arctic, as well as in the Southern Atlantic Ocean across the 20 degree south latitude. ANHA was designed to be a subset of the ORCA global grid, allowing us to use a regional configuration to use much less computing resources (RAM + CPU time) to carry out our research and development purposes.

Here we show the 1/4 degree resolution ANHA configuration (ANHA4)

ANHA4 horizontal grid spacing

ANHA4 is our low resolution regional configuration that affords us a low-cost, eddy-permitting simulation. Such simulations are particularly useful for any sensitivity studies since we can finish a multi-decade simulation within a month or so. ANHA4 has been a very productive configuration. Its fast simulation time allows us to test all sorts of new model development, parameter testing, coupled systems. Here is our incomplete listing of our ANHA4 simulations with some useful information:

ANHA4 simulations:

ANHA4 simulations with Tides:

ANHA4 BaySys Climate simulations:

ANHA4 simulations with 75 vertical levels:

ANHA4 ice shelf melt

ANHA4 Icebergs

ANHA4 BLING runs

ANHA4 SBC filtering runs

ANHA4 Greenland

ANHA4 Runoff Test

ANHA4 Atmospheric Forcing

ANHA4 Misc