In:
The Cryosphere, Copernicus GmbH, Vol. 12, No. 6 ( 2018-06-15), p. 2073-2085
Abstract:
Abstract. A new algorithm for estimating sea ice age (SIA) distribution based on the
Eulerian advection scheme is presented. The advection scheme accounts for the
observed divergence or convergence and freezing or melting of sea ice and predicts
consequent generation or loss of new ice. The algorithm uses daily gridded sea
ice drift and sea ice concentration products from the Ocean and Sea Ice
Satellite Application Facility. The major advantage of the new algorithm is
the ability to generate individual ice age fractions in each pixel of the
output product or, in other words, to provide a frequency distribution of the
ice age allowing to apply mean, median, weighted average or other statistical
measures. Comparison with the National Snow and Ice Data Center SIA product
revealed several improvements of the new SIA maps and time series. First, the
application of the Eulerian scheme provides smooth distribution of the ice
age parameters and prevents product undersampling which may occur when a
Lagrangian tracking approach is used. Second, utilization of the new sea ice drift product void of
artifacts from EUMETSAT OSI SAF resulted in more
accurate and reliable spatial distribution of ice age fractions. Third,
constraining SIA computations by the observed sea ice concentration
expectedly led to considerable reduction of multi-year ice (MYI) fractions.
MYI concentration is computed as a sum of all MYI
fractions and compares well to the MYI products based on passive and active
microwave and SAR products.
Type of Medium:
Online Resource
ISSN:
1994-0424
DOI:
10.5194/tc-12-2073-2018
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2018
detail.hit.zdb_id:
2393169-3
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