Fix ET "Blooming" Around water bodies

[gabe-parrish]

Around water bodies, especially in deserts. We notice a halo of high ET around the entire water body. Gabriel Senay found a fix, which essentially amounts to commenting out this line:

openet-ssebop/openet/ssebop/image.py

Line 894 in fe974e5

.where(ndvi_avg_unmasked.lt(0), lst_avg_unmasked)

###Blooming Example

Fixed ET:

[macfriedrichs]

One preferred solution to review - Replacing final .where statement for negative NDVI using lst_smooth_unmasked with Tc_warm100 derivative for the last Tc_cold layer condition as follows:

(Original) `var Tc_cold = lst_smooth_unmasked

    .where((ndvi_smooth.gte(0).and(ndvi_smooth.lte(ndvi_threshold))), Tc_warm)
    .where(ndvi_smooth.gt(ndvi_threshold), lst_smooth)
    .where(wet_region_mask_5km, Tc_warm100)
    .where(ndvi_smooth_unmasked.lt(0), lst_smooth_unmasked)`

with

(Fixed) `var Tc_cold = lst_smooth_unmasked

    .where((ndvi_smooth.gte(0).and(ndvi_smooth.lte(ndvi_threshold))), Tc_warm) 
    .where(ndvi_smooth.gt(ndvi_threshold), lst_smooth)
    .where(wet_region_mask_5km, Tc_warm100)
    .where(ndvi_smooth_unmasked.lt(0), Tc_warm100)`