Seasonal mean air temperatures and ice phenology characteristics of Great Bear Lake and Great Slave Lake (2002-2009)
Time series of brightness temperatures (T(B)) from the Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) are examined to determine ice phenology variables on the two largest lakes of northern Canada: Great Bear Lake (GBL) and Great Slave Lake (GSL). T(B) measurements from the 18...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.811831 2024-09-15T18:08:12+00:00 Seasonal mean air temperatures and ice phenology characteristics of Great Bear Lake and Great Slave Lake (2002-2009) Kang, Kyung-Kuk Duguay, Claude R Howell, Stephen E L MEDIAN LATITUDE: 63.395800 * MEDIAN LONGITUDE: -119.218700 * SOUTH-BOUND LATITUDE: 61.600000 * WEST-BOUND LONGITUDE: -123.427400 * NORTH-BOUND LATITUDE: 65.191600 * EAST-BOUND LONGITUDE: -115.010000 * DATE/TIME START: 2002-01-01T00:00:00 * DATE/TIME END: 2009-01-01T00:00:00 2012 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.811831 https://doi.org/10.1594/PANGAEA.811831 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.811831 https://doi.org/10.1594/PANGAEA.811831 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Kang, Kyung-Kuk; Duguay, Claude R; Howell, Stephen E L (2012): Estimating ice phenology on large northern lakes from AMSR-E: algorithm development and application to Great Bear Lake and Great Slave Lake, Canada. The Cryosphere, 6(2), 235-254, https://doi.org/10.5194/tc-6-235-2012 International Polar Year (2007-2008) IPY dataset publication series 2012 ftpangaea https://doi.org/10.1594/PANGAEA.81183110.5194/tc-6-235-2012 2024-07-24T02:31:21Z Time series of brightness temperatures (T(B)) from the Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) are examined to determine ice phenology variables on the two largest lakes of northern Canada: Great Bear Lake (GBL) and Great Slave Lake (GSL). T(B) measurements from the 18.7, 23.8, 36.5, and 89.0 GHz channels (H- and V- polarization) are compared to assess their potential for detecting freeze-onset/melt-onset and ice-on/ice-off dates on both lakes. The 18.7 GHz (H-pol) channel is found to be the most suitable for estimating these ice dates as well as the duration of the ice cover and ice-free seasons. A new algorithm is proposed using this channel and applied to map all ice phenology variables on GBL and GSL over seven ice seasons (2002-2009). Analysis of the spatio-temporal patterns of each variable at the pixel level reveals that: (1) both freeze-onset and ice-on dates occur on average about one week earlier on GBL than on GSL (Day of Year (DY) 318 and 333 for GBL; DY 328 and 343 for GSL); (2) the freeze-up process or freeze duration (freeze-onset to ice-on) takes a slightly longer amount of time on GBL than on GSL (about 1 week on average); (3) melt-onset and ice-off dates occur on average one week and approximately four weeks later, respectively, on GBL (DY 143 and 183 for GBL; DY 135 and 157 for GSL); (4) the break-up process or melt duration (melt-onset to ice-off) lasts on average about three weeks longer on GBL; and (5) ice cover duration estimated from each individual pixel is on average about three weeks longer on GBL compared to its more southern counterpart, GSL. A comparison of dates for several ice phenology variables derived from other satellite remote sensing products (e.g. NOAA Interactive Multisensor Snow and Ice Mapping System (IMS), QuikSCAT, and Canadian Ice Service Database) show that, despite its relatively coarse spatial resolution, AMSR-E 18.7 GHz provides a viable means for monitoring of ice phenology on large northern lakes. Other/Unknown Material Great Bear Lake Great Slave Lake International Polar Year IPY The Cryosphere PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-123.427400,-115.010000,65.191600,61.600000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Kang, Kyung-Kuk Duguay, Claude R Howell, Stephen E L Seasonal mean air temperatures and ice phenology characteristics of Great Bear Lake and Great Slave Lake (2002-2009) |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
Time series of brightness temperatures (T(B)) from the Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) are examined to determine ice phenology variables on the two largest lakes of northern Canada: Great Bear Lake (GBL) and Great Slave Lake (GSL). T(B) measurements from the 18.7, 23.8, 36.5, and 89.0 GHz channels (H- and V- polarization) are compared to assess their potential for detecting freeze-onset/melt-onset and ice-on/ice-off dates on both lakes. The 18.7 GHz (H-pol) channel is found to be the most suitable for estimating these ice dates as well as the duration of the ice cover and ice-free seasons. A new algorithm is proposed using this channel and applied to map all ice phenology variables on GBL and GSL over seven ice seasons (2002-2009). Analysis of the spatio-temporal patterns of each variable at the pixel level reveals that: (1) both freeze-onset and ice-on dates occur on average about one week earlier on GBL than on GSL (Day of Year (DY) 318 and 333 for GBL; DY 328 and 343 for GSL); (2) the freeze-up process or freeze duration (freeze-onset to ice-on) takes a slightly longer amount of time on GBL than on GSL (about 1 week on average); (3) melt-onset and ice-off dates occur on average one week and approximately four weeks later, respectively, on GBL (DY 143 and 183 for GBL; DY 135 and 157 for GSL); (4) the break-up process or melt duration (melt-onset to ice-off) lasts on average about three weeks longer on GBL; and (5) ice cover duration estimated from each individual pixel is on average about three weeks longer on GBL compared to its more southern counterpart, GSL. A comparison of dates for several ice phenology variables derived from other satellite remote sensing products (e.g. NOAA Interactive Multisensor Snow and Ice Mapping System (IMS), QuikSCAT, and Canadian Ice Service Database) show that, despite its relatively coarse spatial resolution, AMSR-E 18.7 GHz provides a viable means for monitoring of ice phenology on large northern lakes. |
format |
Other/Unknown Material |
author |
Kang, Kyung-Kuk Duguay, Claude R Howell, Stephen E L |
author_facet |
Kang, Kyung-Kuk Duguay, Claude R Howell, Stephen E L |
author_sort |
Kang, Kyung-Kuk |
title |
Seasonal mean air temperatures and ice phenology characteristics of Great Bear Lake and Great Slave Lake (2002-2009) |
title_short |
Seasonal mean air temperatures and ice phenology characteristics of Great Bear Lake and Great Slave Lake (2002-2009) |
title_full |
Seasonal mean air temperatures and ice phenology characteristics of Great Bear Lake and Great Slave Lake (2002-2009) |
title_fullStr |
Seasonal mean air temperatures and ice phenology characteristics of Great Bear Lake and Great Slave Lake (2002-2009) |
title_full_unstemmed |
Seasonal mean air temperatures and ice phenology characteristics of Great Bear Lake and Great Slave Lake (2002-2009) |
title_sort |
seasonal mean air temperatures and ice phenology characteristics of great bear lake and great slave lake (2002-2009) |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.811831 https://doi.org/10.1594/PANGAEA.811831 |
op_coverage |
MEDIAN LATITUDE: 63.395800 * MEDIAN LONGITUDE: -119.218700 * SOUTH-BOUND LATITUDE: 61.600000 * WEST-BOUND LONGITUDE: -123.427400 * NORTH-BOUND LATITUDE: 65.191600 * EAST-BOUND LONGITUDE: -115.010000 * DATE/TIME START: 2002-01-01T00:00:00 * DATE/TIME END: 2009-01-01T00:00:00 |
long_lat |
ENVELOPE(-123.427400,-115.010000,65.191600,61.600000) |
genre |
Great Bear Lake Great Slave Lake International Polar Year IPY The Cryosphere |
genre_facet |
Great Bear Lake Great Slave Lake International Polar Year IPY The Cryosphere |
op_source |
Supplement to: Kang, Kyung-Kuk; Duguay, Claude R; Howell, Stephen E L (2012): Estimating ice phenology on large northern lakes from AMSR-E: algorithm development and application to Great Bear Lake and Great Slave Lake, Canada. The Cryosphere, 6(2), 235-254, https://doi.org/10.5194/tc-6-235-2012 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.811831 https://doi.org/10.1594/PANGAEA.811831 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81183110.5194/tc-6-235-2012 |
_version_ |
1810445538563194880 |