Create index for the strength of selected currents at key locations

[Thomas-Moore-Creative]

• [x] map the 4 sections for the calculations
• [x] "head" of the EAC @ 27south
• [x] extension south of the EAC
• [x] extension east of the EAC
• [x] SEC
• [x] Set clear sign convention for N/S & E/W current (strength)
• [x] export into usable dataframe & csv files

[Thomas-Moore-Creative]

References: Revisiting the circulation of the East Australian Current: Its path, separation, and eddy field - Oke et al Seasonal variability in the continental shelf waters off southeastern Australia: Fact or fiction? - Wood et al The East Australian Current and Property Transport at 27°S from 2012 to 2013 - Sloyan et al Drivers of decadal variability in the Tasman Sea - Sloyan & OKane

Latitude = -27.0 Longitude = 153.5 - 155.5 Depth = 0 - 2000

Head of the EAC parameters: EAC_transport = weighted_v.sel({'lon':slice(153.5,155.5),'depth':slice(0,2000)}).sel({'lat':-27},method='nearest').sum(dim=('depth','lon'),skipna=True,keep_attrs = True).rename('EAC_transport')

[Thomas-Moore-Creative]

EAC extension parameters:

EAC_ext_transport = weighted_v.sel({'lon':slice(150,151.75),'depth':slice(0,1000)}).sel({'lat':-38},method='nearest')\ .sum(dim=('depth','lon'),skipna=True,keep_attrs = True).rename('EAC_transport').compute()

EAC "eastern extension" aka "Tasman Front (TF)" parameters:

TF_transport = weighted_u.sel({'lat':slice(-35,-30),'depth':slice(0,1000)}).sel({'lon':160},method='nearest')\ .sum(dim=('depth','lat'),skipna=True,keep_attrs = True).rename('EAC_transport').compute()

SEC parameters:

SEC_transport = weighted_u.sel({'lat':slice(-17,-11),'depth':slice(0,1000)}).sel({'lon':172},method='nearest')\ .sum(dim=('depth','lat'),skipna=True,keep_attrs = True).rename('EAC_transport').compute()

[Thomas-Moore-Creative]

files exported and shared with team.