Sea-ice tracking on the east coast of Canada using NOAA AVHRR imagery

Heacock, T.; Hirose, T.; Lee, F.; Manore, M.; Ramsay, B.

doi:10.1017/s0260305500013173

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…Remotely Sensed data have proven to be a useful tool in the manual and automated tracking of Sea ice through time-sequential images (Heacock and others, 1993; Agnew and others, 1997; Kwok and others, 1998). the capabilities of Synthetic aperture radar (SAR) Systems to provide coverage during polar darkness and through almost all atmospheric conditions have led to more reliable Satellite-based ice-motion tracking.…”

Section: Methodsmentioning

confidence: 99%

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A case Study of old-ice import and export through Peary and Sverdrup Channels in the Canadian Arctic Archipelago: 1998–2005

Alt¹,

Wilson²,

Carrières³

2006

Ann. Glaciol.

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This case study attempts to quantify the amount and timing of the import, export and through-flow of old ice in the Peary Channel-Sverdrup Channel area of the northern Canadian Arctic Archipelago during the period 1998-2005. The study combines quantitative weekly area-averaged ice coverage evaluations from the Canadian Ice Service (CIS) Digital Archive with detailed analysis of RADARSAT imagery and ice-motion results from the CIS ice-motion algorithm. The results show that in 1998 more than 70% of the old ice in Peary-Sverdrup was lost, half by melt and export to the south and the other half by export north into the Arctic Ocean, and that no Arctic Ocean old ice was imported into Peary-Sverdrup. A net import of 10% old ice was seen in 1999, with some indication of through-flow into southern channels. In 2000, no net import of old ice occurred in Peary-Sverdrup, but there was significant through-flow, with evidence of old ice reaching the Northwest Passage by November. Full recovery of the old-ice regime was complete by the end of 2001. More than two-thirds of the recovery was due to the in situ formation of second-year ice. Conditions in the following 3 years were near normal.

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Section: Methodsmentioning

confidence: 99%

“…changes in ice-floe position are calculated using common cross-correlation coefficients of eight-bit digital numbers between image pairs and then calculating the Spatial offset. further details on the tracker algorithm are given in Heacock and others (1993).…”

Section: Methodsmentioning

confidence: 99%

A case Study of old-ice import and export through Peary and Sverdrup Channels in the Canadian Arctic Archipelago: 1998–2005

Alt¹,

Wilson²,

Carrières³

2006

Ann. Glaciol.

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“…Three papers presented at the symposium dealt with ice motion or image geolocation. Heacock and others (1993) discuss the difficulties of tracking seasonal ice off the coast of Newfoundland and Labrador. In addition to the usual problem of cloud cover, floe sizes well below the resolution of AVHRR cause difficulty to both correlation and feature tracking algorithms; the tracker must recognize the patchiness in the ice cover.…”

Section: Sea-ice Motionmentioning

confidence: 99%

Snow and ice applications of AVHRR in polar regions: report of a workshop held in Boulder, Colorado, 20 May 1992

et al. 1993

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ABSTRACT. The third symposium on Remote Sensing of Snow and Ice, organized by the International Glaciological Society, took place in Boulder, Colorado, 17-22 May 1992. As part of this meeting a total of 21 papers was presented on snow and ice applications of Advanced Very High Resolution Radiometer (AVHRR ) satellite data in polar regions. Also during this meeting a NASA sponsored Workshop was held to review the status of polar surface measurements from A VHRR. In the following we have summarized the ideas and recommendations from the workshop, and the conclusions of relevant papers given during the regular symposium sessions. The seven topics discussed include cloud masking, ice surface temperature, narrow-band albedo, ice concentration, lead statistics, sea-ice motion and ice-sheet studies with specifics on applications, algorithms and accuracy, following recommendations for future improvements. In general, we can affirm the strong potential of AVHRR for studying sea ice and snow covered surfaces, and we highly recommend this satellite data set for long-term monitoring of polar process studies. However, progress is needed to reduce the uncertainty of the retrieved parameters for all of the above mentioned topics to make this data set useful for direct climate applications such as heat balance studies and others. Further, the acquisition and processing of polar AVHRR data must become better coordinated between receiving stations, data centers and funding agencies to guarantee a long-term commitment to the collection and distribution of high q uality data. Stiffen and others: Snow and ice application of A VHRR

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“…Overland, 1985) and remotely sensed data (e.g. Heacock and others, 1993; Kwok and others, 1998). Beacon instrumentation, telecommunication and deployment costs have meant that a limited number can be deployed in large study areas.…”

Section: Introductionmentioning

confidence: 99%

“…Changes in ice-floe position are calculated using common cross-correlation coefficients of eight-bit digital numbers between image pairs and then calculating the spatial offset. Further details on the Tracker algorithm are given in Heacock and others (1993). Resultant drift vectors are then overlaid on the SCW images (Fig.…”

Section: Introductionmentioning

confidence: 99%

A case-study in tracking 1998 polynya ice dynamics in Smith Sound, North Water polynya region, Canadian Arctic, using RADARSAT-1 data

Wilson¹,

King

Barber

2001

Ann. Glaciol.

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Monitoring ice motion provides insight into the relative contributions of atmospheric and oceanic forcing to polynya dynamics In this study ice kinematics in the North Water (NOW) region, northern Baffin Bay Canadian Arctic are determined using time-sequential RADARSAT-1 ScanSARWide imagery (from the period January-December 1998), processed by the automated ice-tracking algorithm (Tracker) currently used at the Canadian Ice Service (CIS). A case-study is then carried out on the Smith Sound region from January till the end of june 1998 to monitor polynya formation, maintenance and disintegration. This has two objectives: (1) to evaluate satellite ice-motion products as a means of better understanding the relative contributions of latent- and sensible-heat mechanisms responsible for the formation and behaviour of the NOW polynya, and (2) to study the influence of winds on regional sea-ice motion. Derived ice-motion maps were validated using in situ ice beacons deployed onto floes in the NOW region during the 1998 ship-based science experiment. Tracker-derived displacement and directional regressions were 0.93 and 0.79, respectively, with a total standard error of 3.6 km in magnitude and 38.8° in direction. Analysis of monthly mean ice-motion maps shows that a significant export of ice occurs from the polynya. A comparison of weekly-averaged ice motion with the mean wind-field data suggests that ice export in Smith Sound is influenced by synoptic-scale atmospheric pressure systems.

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Sea-ice tracking on the east coast of Canada using NOAA AVHRR imagery

Cited by 8 publications

References 3 publications

A case Study of old-ice import and export through Peary and Sverdrup Channels in the Canadian Arctic Archipelago: 1998–2005

A case Study of old-ice import and export through Peary and Sverdrup Channels in the Canadian Arctic Archipelago: 1998–2005

Snow and ice applications of AVHRR in polar regions: report of a workshop held in Boulder, Colorado, 20 May 1992

A case-study in tracking 1998 polynya ice dynamics in Smith Sound, North Water polynya region, Canadian Arctic, using RADARSAT-1 data

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