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Retrieval wet params #60

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merged 2 commits into from
Sep 5, 2023
Merged

Retrieval wet params #60

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d37aec2
add wet snow params to rerun
ZachHoppinen Sep 1, 2023
7b81b6e
Update retrieval.py
ZachHoppinen Sep 1, 2023
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19 changes: 14 additions & 5 deletions spicy_snow/retrieval.py
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Original file line number Diff line number Diff line change
Expand Up @@ -184,7 +184,13 @@ def retrieve_snow_depth(area: shapely.geometry.Polygon,

return ds

def retrieval_from_parameters(dataset: xr.Dataset, A: float, B: float, C: float):
def retrieval_from_parameters(dataset: xr.Dataset,
A: float,
B: float,
C: float,
wet_SI_thresh: float = 0,
freezing_snow_thresh: float = 2,
wet_snow_thres: float = -2):
"""
Retrieve snow depth with varied parameter set from an already pre-processed
dataset.
Expand All @@ -200,7 +206,10 @@ def retrieval_from_parameters(dataset: xr.Dataset, A: float, B: float, C: float)
dataset: xarray dataset with snow_depth variable calculated from parameters
"""

dataset = dataset[['s1','deltaVV','ims','fcf','lidar-sd']]
# dataset = dataset[['s1','deltaVV','ims','fcf','lidar-sd']]

# load datast to index
dataset = dataset.load()

# calculate delta CR and delta VV
dataset = calc_delta_cross_ratio(dataset, A = A)
Expand All @@ -218,11 +227,11 @@ def retrieval_from_parameters(dataset: xr.Dataset, A: float, B: float, C: float)
dataset = calc_snow_index_to_snow_depth(dataset, C = C)

# find newly wet snow
dataset = id_newly_wet_snow(dataset)
dataset = id_wet_negative_si(dataset)
dataset = id_newly_wet_snow(dataset, wet_thresh = wet_snow_thres)
dataset = id_wet_negative_si(dataset, wet_SI_thresh = wet_SI_thresh)

# find newly frozen snow
dataset = id_newly_frozen_snow(dataset)
dataset = id_newly_frozen_snow(dataset, freeze_thresh = freezing_snow_thresh)

# make wet_snow flag
dataset = flag_wet_snow(dataset)
Expand Down