However, this year we are using a revised ice age product, one based on a 15 %
sea ice concentration threshold rather than the earlier version, which used a threshold of 40 % [see Maslanik et al., in review for more details].
The ice age product is based on a 15 %
sea ice concentration threshold to be consistent with the threshold used for mapping overall sea ice extent.
Not exact matches
A
threshold h applied on the (thickness Feb = Mar
concentration Sept) field yields the predicted September extent after the regression with the past four years of
sea ice extent observations.
The BRT then manufactured an untested
sea -
ice threshold based solely on circumstantial evidence to assert whelping and nursing required
sea ice concentrations over 25 %.
The use of a 15 %
threshold on
sea ice concentration captures greater detail within the marginal
ice zone, matches NSIDC's
threshold used for mapping overall
sea ice extent and should therefore provide a better estimate of the September 2011
ice extent.