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Changes in MMAB Hemispheric sea ice land file

The 25.4 km polar stereographic land masks are nearly identical to their former values as used for generating the hemispheric grib data files which are distributed operationally. There is no change at all to the polar stereographic land mask used in constructing the global ice file.

The changes are listed below. The flag values are 157 for land, 0 for ocean, and 195 for 'coast'. The southern hemisphere changes 5 flags of 122,475. The northern hemisphere changes 71 points of 179,025, mostly changing mid-latitude points from ocean to coast.

Robert.Grumbine@noaa.gov
Last Modified 12 April 2001
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'old' is the operational file in use up through 12 April 2001
'new' is the recomputed file:
Southern Hemisphere changes
OldNewLatitudeLongitude
195 157 -36.900 -220.194
0 195 -37.025 -220.383
157 195 -37.630 -219.749
0 195 -53.029 -286.892
0 195 -75.684 -196.131

Northern Hemisphere changes
OldNewLatitudeLongitude
15719537.652-76.269
019528.699-114.434
019529.865-112.811
019530.741-113.213
019529.686-115.733
019542.589-80.000
019543.372-77.449
019533.581-118.055
019544.387-83.196
019545.278-81.187
019545.693-81.500
019547.633-85.679
019550.021-61.565
019543.509-124.397
019558.367-78.277
019560.842-69.150
019561.150-69.992
019562.491-79.502
019562.830-74.440
019562.718-64.745
019565.232-83.334
019566.663-53.699
019569.064-94.676
019569.230-95.489
019566.301-120.475
019574.544-93.601
019572.942-111.661
019574.901-98.726
019575.692-80.000
019543.710-6.809
019551.967-5.410
019558.696-153.217
019572.942-21.661
019550.474-1.976
019550.604-0.976
019558.286-2.995
019551.1702.360
019554.305-162.781
019545.64013.296
019560.32218.781
019563.642178.996
019564.505178.056
019563.37021.411
019581.03050.601
019560.57421.219
019569.309168.819
019557.90824.139
019552.416173.266
019560.79632.584
019559.224164.822
019556.607163.435
019573.00873.800
019555.697162.021
019569.13566.310
019544.48837.867
019545.57348.006
019546.29252.847
019545.51451.832
019543.98350.726
019544.392145.205
019539.41549.508
019542.04453.641
019555.244109.398
019546.02359.923
019539.852139.638
019542.172130.633
019542.47776.911
019534.131132.347
019532.610133.071
019533.611129.830
019531.316130.069

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Page last modified: Thursday, 06-Aug-2009 20:20:34 UTC