NDLI: Monitoring of new-ice in Greenland waters

Content Provider	IEEE Xplore Digital Library
Author	Tonboe, R. Ezraty, R.E.
Copyright Year	2002
Description	Author affiliation: Danish Meteorological Inst., Copenhagen, Denmark (Tonboe, R.)
Abstract	In the sea ice covered waters of Greenland the active polarisation ratio (APR) of QuikSCAT SeaWinds Ku-band (13 GHz) scatterometer measurements and the passive polarisation ratio (PPR) of DMSP-SSM/I 19 GHz radiometer measurements are used in combination to classify new-ice and older ice from 1999 to 2001. In particular, the two regions where new-ice is covering large areas: (1) Baffin Bay (64/spl deg/W, 72/spl deg/N) during the yearly freeze-up in autumn, and (2) the formation of the 'Odden' in the Greenland Sea (8/spl deg/W, 75/spl deg/N) in late winter, were used in the study. The results of the surface cover classification in the Greenland Sea and in Baffin Bay were validated against 19 Radarsat ScanSAR wide scenes from the same period. In our study new-ice is defined according to its backscatter and radiative properties and our results show that the transformation to older ice usually occurs within one week. Further, the formation of new-ice and its transformation to older ice or the destruction of an ice cover occur on a daily time scale. The detection of new-ice using the above method is consistent with Radarsat data for areas >50 km both in Baffin Bay and the Greenland Sea. Furthermore, it was found that large areas are covered by new-ice during the freeze up of the Baffin Bay in October and November. In the Greenland Sea the new-ice appears in March as an ice peninsula appended to the belt of older ice drifting along the east coast of Greenland. These results have been confirmed by Radarsat observations. However the algorithm was found to mis-classify the surface cover in the following cases: (1) open water into sea ice at high surface wind speeds (>15 m/s), and (2) regions of grease ice into open water or other ice types.
Sponsorship	IEEE IEEE Geosci. & Remote Sensing Soc. Canadian Remote Sensing Soc. Univ. Waterloo Natural Resources Canada (NRCan) Canadian Space Agency (CSA) Environ. Canada NASA Nat. Oceanic & Atmos. Adm. (NOAA) Office of Naval Res.(ONR) Nat. Space Dev. Agency of Japan (NASDA) Nat. Polar-orbiting Environ. Satellite Syst. (NPOESS)
Starting Page	1932
Ending Page	1934
File Size	407359
Page Count	3
File Format	PDF
ISBN	078037536X
DOI	10.1109/IGARSS.2002.1026304
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-06-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Monitoring Sea surface Sea ice Polarization Sea measurements Ice surface Radar measurements Radiometry Layout Backscatter
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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