In the Arctic Region, the monthly fields were created by fitting the Winter and Summer PHC 2.1 fields to a cycloid-sinusoid function. Outside of the Arctic Region, the monthly fields mimic those found in NODC's WOA. Refer to the PHC 2.1 Overview and also the PHC 2.0 paper for more information about how we created the monthly fields.Field Depths
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Specifics

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