Comparison to H*Wind product

Below is the the wind swaths comparison of hurricane Katrina for Luisiana, USA: the place of the hurricane’s deployment over the land.

HWind_Hurricane_Katrina_Luisiana_Swath Hurricane_Katrina_Swath_Luisiana_Climate_Wikience_no_lats

The spatial resolution of the both maps is 0.25° × 0.25°. The H*Wind wind speed values for a single 0.25° × 0.25° grid cell were averaged with 0.81 coefficient as they suggest.

The scatterplot of the wind speed values for this region is presented below.

ScatterPlot_HWind_CW_Luisiana

The Spearman correlation between H*Wind and Climate Wikience output for this region equals to 0.89. This correlation coefficient is generally considered to be “very strong” meaning very good agreement between the two datasets. The Spearman method was used since the data are not normally distributed.

The complete swaths (for full hurricane Katrina lifetime) are shown below.

HW_Katrina_full_swath

PNG | GeoTIFF(1)

CW_Katrina_Swath_full_NO_LATS

PNG | GeoTIFF(2)

The scatterplot (Spearman correlation is 0.86):

ScatterPlot_HWind_CW_Katrina_FullSwath

(1) GDAL info: H*Wind Hurricane Katrina GeoTIFF swath

Note: missing value = -1 

> GDALinfo("hw_katrina.tif")
rows        48 
columns     45 
bands       1 
lower left origin.x        -98 
lower left origin.y        20 
res.x       0.5 
res.y       0.5 
ysign       -1 
oblique.x   0 
oblique.y   0 
driver      GTiff 
projection  +proj=longlat +datum=WGS84 +no_defs 
file        hw_katrina.tif 
apparent band summary:
   GDType hasNoDataValue NoDataValue blockSize1 blockSize2
1 Float32           TRUE          -1         45         45
apparent band statistics:
  Bmin     Bmax    Bmean      Bsd
1   -1 19.23882 4.505298 4.636218
Metadata:
AREA_OR_POINT=Area


(2) GDAL info: Climate Wikience Hurricane Katrina GeoTIFF Swath

Note: missing value = -1 

> GDALinfo("cw_katrina.tif")
rows        146 
columns     135 
bands       1 
lower left origin.x        -99 
lower left origin.y        13.25 
res.x       0.25 
res.y       0.25 
ysign       -1 
oblique.x   0 
oblique.y   0 
driver      GTiff 
projection  +proj=longlat +datum=WGS84 +no_defs 
file        cw_katrina.tif 
apparent band summary:
   GDType hasNoDataValue NoDataValue blockSize1 blockSize2
1 Float32           TRUE          -1         15        135
apparent band statistics:
  Bmin     Bmax    Bmean      Bsd
1    0 39.67152 6.211201 5.257813
Metadata:
AREA_OR_POINT=Area

 

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