Hi,@hannay! I can't find the UBOT and VBOT in CAM output.(My CESM version is 2.1.3) I find "U U10 UM_CLUBB UP2_CLUBB UPWP_CLUBB UTEND_CLUBB UU V VD01 VM_CLUBB VP2_CLUBB VPWP_CLUBB VQ VT VTEND_CLUBB VU VV" field in my cam.h0 file.U10 is the 10-meter wind. It is not the zonal wind component at 10m. It is the total wind component.
U10 = sqrt( sqr(U at 10m) + sqr(V at 10m) )
UBOT and VBOT are the wind on the first model level (which is higher than 10m). Maybe you could use these if you need the directions ?
myabe U and V correspond to UBOT and VBOT respectively in CESM2.1.3?
I see U variable has many levels. I think the 992.556 level is the U10 wind direction. Correct?
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