The Influence of Surface Sediment Presence on Observed Passive Microwave Brightness Temperatures of First-Year Sea Ice during the Summer Melt Period

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dc.contributor.authorHarasyn, Madison
dc.contributor.authorIsleifson, Dustin
dc.contributor.authorBarber, David
dc.date.accessioned2020-08-17T21:28:58Z
dc.date.available2020-08-17T21:28:58Z
dc.date.issued2019-06-17
dc.date.submitted2020-08-17T21:28:58Zen_US
dc.description.abstractKnowledge on the influence of sea ice sediment on passive microwave brightness temperatures (TB) is currently limited, leading to potential inaccuracies in derived sea ice concentrations where this ice exists. We propose that sediment may influence TB in two ways: (i) by altering the surface dielectrics, or (ii) by generating differential melt rates across the ice surface, increasing surface roughness. This study will examine the second proposed hypothesis through a multi-platform analysis, combining in-situ passive microwave and unmanned aerial vehicle (UAV) data. UAV image analysis shows a negative relationship between surface elevation and sediment concentration. Comparing this with observed TB shows that horizontally polarized emissions are the most sensitive to rougher ice surfaces with 19 and 37 GHz TB decreasing rapidly with increased incidence angle. At a 55 incidence angle, 89 GHz offers the greatest potential for discriminating sea ice surfaces influenced by sediment presence, as TB are greater in both polarizations in comparison with non-sediment-laden ice. Results from this research provide evidence for a relationship between sea ice surface sediment and passive microwave signature, meriting future research in this field.en_US
dc.description.sponsorshipCanada Research Chair funding (DGB), NSERC discovery grant funding (DGB and DI), the University of Manitoba Graduate Fellowship (UMGF) and the Northern Scientific Training Program (NSTP)en_US
dc.identifier.citationHarasyn, M. L., Isleifson, D., Barber, D. G., 2019. The Influence of Surface Sediment Presence on Observed Passive Microwave Brightness Temperatures of First-Year Sea Ice during the Summer Melt Period, Can. J. Remote.Sens. 45:3-4, 333-349. http://doi.org/10.1080/07038992.2019.1625759.en_US
dc.identifier.doi10.1080/07038992.2019.1625759
dc.identifier.issn0703-8992
dc.identifier.issn1712-7971
dc.identifier.urihttp://hdl.handle.net/1993/34866
dc.language.isoengen_US
dc.publisherTaylor & Francis Groupen_US
dc.rightsopen accessen_US
dc.subjectpassive microwave brightness temperaturesen_US
dc.subjectsea iceen_US
dc.subjectsea ice surface sedimenten_US
dc.subjectUAVen_US
dc.titleThe Influence of Surface Sediment Presence on Observed Passive Microwave Brightness Temperatures of First-Year Sea Ice during the Summer Melt Perioden_US
dc.typeArticleen_US
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