U.S. National/Naval Ice Center Digital Sea Ice Data and Climatology

Dedrick, K.R.; Partington, K.C.; Woert, Michael Van; Bertoia, C.; Benner, Dietrich

doi:10.1080/07038992.2001.10854887

Cited by 48 publications

(37 citation statements)

References 11 publications

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“…Preliminary analysis of the SIGRID ice codes and the study by Dedrick et al (2001) indicate that during the period of study , the percentage of ice chart polygons, which reported ice stage of development increased from 65% to greater than 90%. However, it was felt that this was not sufficient to break down total ice concentrations into sea-ice type reliably during the study period.…”

Section: Canadian and United States Ice Chart Datamentioning

confidence: 99%

“…The NIC northern hemisphere ice chart data were obtained from the NSIDC (Tannis and Smolyanitsky, 2000). A description and initial evaluation of the data can be found in Dedrick et al (2001). Like the Canadian regional charts, the dataset consists of unique polygonal areas of homogeneous ice conditions prepared by NIC analysts and using all available satellite imagery, in-situ reports and meteorological/ oceanographic guidance data.…”

Section: Canadian and United States Ice Chart Datamentioning

confidence: 99%

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The use of operational ice charts for evaluating passive microwave ice concentration data

Agnew¹,

Howell

2003

Atmosphere-Ocean

113

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Section: Canadian and United States Ice Chart Datamentioning

confidence: 99%

Section: Canadian and United States Ice Chart Datamentioning

confidence: 99%

The use of operational ice charts for evaluating passive microwave ice concentration data

Agnew¹,

Howell

2003

Atmosphere-Ocean

113

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“…However, Cavalieri et al (2003) combined the two passive microwave time series by using operational ice charts from the US National Ice Center (Dedrick et al, 2001) to cross-calibrate between the SMMR-SSM/I record and ESMR and bridge the gaps within ESMR and between ESMR and the multi-channel passive microwave record, creating a 30-yr time series spanning January 1972 through December 2002 (http://nsidc.org/data/smmr ssmi ancillary/ area extent.html#merged), denoted here as the "XPM" time series. In the process, adjustments were made to both passive microwave records and this XPM time series is not entirely consistent with the SII time series.…”

Section: Extended Passive Microwave (Xpm)mentioning

confidence: 99%

“…Also, they are of variable lengths and quality, depending on the input data sources (e.g., ship observations, aircraft reconnaissance, etc.). Basin-wide Arctic extents have been compiled for 1972-2007, based on US National Ice Center charts (Dedrick et al, 2001;NIC, 2006).…”

Section: Introductionmentioning

confidence: 99%

A simple approach to providing a more consistent Arctic sea ice extent time series from the 1950s to present

et al. 2012

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Abstract.Observations from passive microwave satellite sensors have provided a continuous and consistent record of sea ice extent since late 1978. Earlier records, compiled from ice charts and other sources exist, but are not consistent with the satellite record. Here, a method is presented to adjust a compilation of pre-satellite sources to remove discontinuities between the two periods and create a more consistent combined 59-yr time series spanning 1953-2011. This adjusted combined time series shows more realistic behavior across the transition between the two individual time series and thus provides higher confidence in trend estimates from 1953 through 2011. The long-term time series is used to calculate linear trend estimates and compare them with trend estimates from the satellite period. The results indicate that trends through the 1960s were largely positive (though not statistically significant) and then turned negative by the mid-1970s and have been consistently negative since, reaching statistical significance (at the 95 % confidence level) by the late 1980s. The trend for September (when Arctic extent reaches its seasonal minimum) for the satellite period, 1979-2011 is −12.9 % decade −1 , nearly double the 1953-2011 trend of −6.8 % decade −1 (percent relative to the 1981-2010 mean). The recent decade (2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011) stands out as a period of persistent decline in ice extent. The combined 59-yr time series puts the strong observed decline in the Arctic sea ice cover during 1979-2011 in a longer-term context and provides a useful resource for comparisons with historical model estimates.

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“…NOAA's National Operational Hydrologic Remote Sensing Center (NOHRSC) also provides a near-daily (during the snow season), 1 -km resolution snow map of the United States and parts of southem Canada (Carroll 1995). Sea ice maps derived from visible, near-infrared and infrared sensors have also been available from the National Oceanic and Atmospheric Administration (NOAA) National Ice Center (NIC) since 1972 (Dedrick et al 2001), and microwave-derived maps have been available since 1975 (Carsey 1 992).…”

Section: O Introductionmentioning

confidence: 99%

MODIS Snow and Sea Ice Products

Hall

Riggs

Salomonson

Earth Science Satellite Remote Sensing

119

103

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Popular SummaryIn this chapter, we desuibe the suite of Earth Observing System (EOS)Moderate-Resolution Imaging Spectromdiometer (MODIS) Terra and Aqua snow and sea ice products. Global, daily products, developed at Goddard Space Flight Center, are archived and distributed through the National Snow and Ice Data Center at various resolutions and on different grids useful for different communities Snow products indude binary snow cover, snow albedo, and in the near future, fraction of snow in a 5OO-m pixel. Sea ice products include ice extent determined with two different algorithms, and sea ice surface temperature.The algorithms used to develop these products are described. Both the snow and sea ice products, available since February 24,2000, are useful for modelers.Validation of the products is also discussed. SignificanceIt is important to describe, in detail, the EOS MODIS snow and ice algorithms and products. Users need this information in order to use the products. Users include university students and researchers and modelers. Many such users do not want to develop their own products from the original MODIS data, a Herculean task, but prefer to use products that have already been developed.

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U.S. National/Naval Ice Center Digital Sea Ice Data and Climatology

Cited by 48 publications

References 11 publications

The use of operational ice charts for evaluating passive microwave ice concentration data

The use of operational ice charts for evaluating passive microwave ice concentration data

A simple approach to providing a more consistent Arctic sea ice extent time series from the 1950s to present

MODIS Snow and Sea Ice Products

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