Evaluation of Operation IceBridge quick-look snow depth estimates on sea ice
We evaluate Operation IceBridge (OIB) “quick‐look” snow depth on sea ice retrievals using in situ measurements taken over immobile first‐year ice (FYI) and multiyear ice (MYI) during March of 2014. Good agreement was found over undeformed FYI (−4.5 cm mean bias) with reduced agreement over deformed...
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Published in | Geophysical research letters Vol. 42; no. 21; pp. 9302 - 9310 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Washington
Blackwell Publishing Ltd
16.11.2015
John Wiley & Sons, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | We evaluate Operation IceBridge (OIB) “quick‐look” snow depth on sea ice retrievals using in situ measurements taken over immobile first‐year ice (FYI) and multiyear ice (MYI) during March of 2014. Good agreement was found over undeformed FYI (−4.5 cm mean bias) with reduced agreement over deformed FYI (−6.6 cm mean bias). Over MYI, the mean bias was −5.7 cm, but 54% of retrievals were discarded by the OIB retrieval process as compared to only 10% over FYI. Footprint scale analysis revealed a root‐mean‐square error (RMSE) of 6.2 cm over undeformed FYI with RMSE of 10.5 cm and 17.5 cm in the more complex deformed FYI and MYI environments. Correlation analysis was used to demonstrate contrasting retrieval uncertainty associated with spatial aggregation and ice surface roughness.
Key Points
OIB QL snow depth on sea ice retrieval performs well in level ice environments
Deformed first‐year and multiyear ice are difficult retrieval environments for the OIB QL product
Surface roughness contributes to diminished correlation between measured and retrieved snow depths |
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Bibliography: | Canadian Space Agency istex:99C3FDAA2FD8876254A5465D8C0555F78AF15A00 ArticleID:GRL53612 ark:/67375/WNG-LSFF03QK-C Supporting Information S1 European Space Agency (ESA) Canada Research Chair program ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0094-8276 1944-8007 |
DOI: | 10.1002/2015GL066389 |