Global ETD Search

31	Passive Microwave Remote Sensing of Ice Cover on Large Northern Lakes: Great Bear Lake and Great Slave Lake, Northwest Territories, Canada Kang, Kyung Kuk January 2012 (has links) Time series of brightness temperature (TB) measurement obtained at various frequencies by the Advanced Microwave Scanning Radiometer–Earth Observing System (AMSR-E) are investigated to determine ice phenology parameters and ice thickness on Great Bear Lake (GBL) and Great Slave Lake (GSL), Northwest Territories, Canada. TB measurements from the 6.9, 10.7, 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 (FO)/melt-onset (MO), ice-on/ice-off dates, and ice thickness on both lakes. The sensitivity of TB measurements at 6.9, 10.7, and 18.7 GHz to ice thickness is also examined using a previously validated thermodynamic lake ice model and the most recent version of the Helsinki University of Technology (HUT) model, which accounts for the presence of a lake-ice layer under snow. This study shows that 18.7 GHz H-pol is the most suitable AMSR-E channel for detecting ice phenology events, while 18.7 GHz V-pol is preferred for estimating lake ice thickness on the two large northern lakes. These two channels therefore form the basis of new ice cover retrieval algorithms. The algorithms were applied to map monthly ice thickness products and all ice phenology parameters on GBL and GSL over seven ice seasons (2002-2009). Through application of the algorithms much was learned about the spatio-temporal dynamics of ice formation, decay and growth rate/thickness on the two lakes. Key results reveal that: 1) both FO and ice-on dates occur on average 10 days earlier on GBL than on GSL; 2) the freeze-up process or freeze duration (FO to ice-on) takes a comparable amount of time on both lakes (two to three weeks); 3) MO and ice-off dates occur on average one week and approximately four weeks later, respectively, on GBL; 4) the break-up process or melt duration (MO to ice-off) lasts for an equivalent period of time on both lakes (six to eight weeks); 5) ice cover duration is about three to four weeks longer on GBL compared to its more southern counterpart (GSL); and 6) end-of-winter ice thickness (April) on GBL tends to be on average 5-15 cm thicker than on GSL, but with both spatial variations across lakes and differences between years. lake ice AMSR-E ice phenology ice thickness Great Bear Lake Great Slave Lake brightness temperature Arctic Canada Geography
32	Passive Microwave Remote Sensing of Ice Cover on Large Northern Lakes: Great Bear Lake and Great Slave Lake, Northwest Territories, Canada Kang, Kyung Kuk January 2012 (has links) Time series of brightness temperature (TB) measurement obtained at various frequencies by the Advanced Microwave Scanning Radiometer–Earth Observing System (AMSR-E) are investigated to determine ice phenology parameters and ice thickness on Great Bear Lake (GBL) and Great Slave Lake (GSL), Northwest Territories, Canada. TB measurements from the 6.9, 10.7, 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 (FO)/melt-onset (MO), ice-on/ice-off dates, and ice thickness on both lakes. The sensitivity of TB measurements at 6.9, 10.7, and 18.7 GHz to ice thickness is also examined using a previously validated thermodynamic lake ice model and the most recent version of the Helsinki University of Technology (HUT) model, which accounts for the presence of a lake-ice layer under snow. This study shows that 18.7 GHz H-pol is the most suitable AMSR-E channel for detecting ice phenology events, while 18.7 GHz V-pol is preferred for estimating lake ice thickness on the two large northern lakes. These two channels therefore form the basis of new ice cover retrieval algorithms. The algorithms were applied to map monthly ice thickness products and all ice phenology parameters on GBL and GSL over seven ice seasons (2002-2009). Through application of the algorithms much was learned about the spatio-temporal dynamics of ice formation, decay and growth rate/thickness on the two lakes. Key results reveal that: 1) both FO and ice-on dates occur on average 10 days earlier on GBL than on GSL; 2) the freeze-up process or freeze duration (FO to ice-on) takes a comparable amount of time on both lakes (two to three weeks); 3) MO and ice-off dates occur on average one week and approximately four weeks later, respectively, on GBL; 4) the break-up process or melt duration (MO to ice-off) lasts for an equivalent period of time on both lakes (six to eight weeks); 5) ice cover duration is about three to four weeks longer on GBL compared to its more southern counterpart (GSL); and 6) end-of-winter ice thickness (April) on GBL tends to be on average 5-15 cm thicker than on GSL, but with both spatial variations across lakes and differences between years. lake ice AMSR-E ice phenology ice thickness Great Bear Lake Great Slave Lake brightness temperature Arctic Canada Geography
33	Teamwork and place-based curriculum and instruction in teaching English to speakers of other languages Bider, Mary Kay 01 January 2002 (has links) The purpose of this project is to apply the theories of John Dewey's experiential learning, providing the foundation of place-based curriculum incorporating community investigation, outdoor education, and project-based learning into an EFL curriculum. Group work in education Experiential learning Environmental education
34	Tse Keh Nay-European Relations and Ethnicity: 1790s-2009 Sims, Daniel Unknown Date No description available. Tse Keh Nay Sekani Ethnicity History Tsay Keh Dene Ingenika Fort Grahame Fort Ware Kwadacha McLeod Lake Takla Lake Bear Lake Fort Connelly Fort Nelson Finlay Forks Adrien Gabriel Morice Alexander MacKenzie Simon Fraser Daniel William Harmon Samuel Black Archibald McDonald John Stuart Treaty No. 8 McLeod Lake Adhesion BC Treaty Process Beaver Dunneza McKenna-McBride Royal Commission Indian Reserve Commission British Columbia Land Claims
35	Tse Keh Nay-European Relations and Ethnicity: 1790s-2009 Sims, Daniel 06 1900 (has links) This thesis examines Tse Keh Nay (Sekani) ethnic identity over three periods of Aboriginal-European relations: the fur trade period, the missionary period, and the treaty and reserve period. It examines the affects these three periods have had on the Tse Keh Nay as an ethnic group in four chapters, the first two dealing with the fur trade and missionary periods, and the last two with the treaty and reserve aspects of the treaty and reserve period. In it I argue that during the first two periods wider Tse Keh Nay ethnic identity was reinforced, while during the latter period local Tse Keh Nay identities were reinforced through government policies that dealt with Tse Keh Nay subgroups on a regional and localized basis. Despite this shift in emphasis, wider Tse Keh Nay ethnic identity has remained, proving that Tse Keh Nay ethnic identity is both situational and dynamic. / History Tse Keh Nay Sekani Ethnicity History Tsay Keh Dene Ingenika Fort Grahame Fort Ware Kwadacha McLeod Lake Takla Lake Bear Lake Fort Connelly Fort Nelson Finlay Forks Adrien Gabriel Morice Alexander MacKenzie Simon Fraser Daniel William Harmon Samuel Black Archibald McDonald John Stuart Treaty No. 8 McLeod Lake Adhesion BC Treaty Process Beaver Dunneza McKenna-McBride Royal Commission Indian Reserve Commission British Columbia Land Claims

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