63 research outputs found
Decadal to seasonal variability of Arctic sea ice albedo
A controlling factor in the seasonal and climatological evolution of the sea
ice cover is its albedo . Here we analyze Arctic data from the Advanced
Very High Resolution Radiometer (AVHRR) Polar Pathfinder and assess the
seasonality and variability of broadband albedo from a 23 year daily record. We
produce a histogram of daily albedo over ice covered regions in which the
principal albedo transitions are seen; high albedo in late winter and spring,
the onset of snow melt and melt pond formation in the summer, and fall freeze
up. The bimodal late summer distribution demonstrates the combination of the
poleward progression of the onset of melt with the coexistence of perennial
bare ice with melt ponds and open water, which then merge to a broad peak at
0.5. We find the interannual variability to be dominated by
the low end of the distribution, highlighting the controlling
influence of the ice thickness distribution and large-scale ice edge dynamics.
The statistics obtained provide a simple framework for model studies of albedo
parameterizations and sensitivities.Comment: 4 pages, 4 figure
Celebrating Mediocrity?: How Schools Shortchange Gifted Students
The version of this article that is archived here is the author's post-print.Some forces that undermine programs for the gifted—misguided fiscal policies, simplistic teaching methodologies, and a resurgence of the philosophy of egalitarianism—are reviewed. Analogous to the demise (and possible resurgence) of programs for the gifted is the evolution of women's sports since the 1920sYe
Differentiating Content for Gifted Learners in Grades 6–12: A CD-ROM of Customizable Menus and Study Guides Review
Teaching students about their own modality strengths can lead to positive learning outcomes
The Benefits of Equalizing Standards and Creativity: Discovering a Balance in Instruction
Cluster Grouping Elementary Gifted Students in the Regular Classroom: A Teacher's Perspective
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