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"We had a lot of fun working
with Martin Jeffries on that lake ice research. I think I probably
enjoyed it the most since I was taking his Monday night class and
getting a lot of background. But the kids liked being out on the ice
collecting data. They got the opportunity to work with teachers visiting
from other states. At one field session they met the teacher who works
with Martin in Antarctica." - Deb Bennett, Fairbanks OLCG Teacher |
The overall objective of our snow and lake ice research (funded by the NSF Arctic Natural Sciences Program) is to understand the spatial and temporal variability of lake ice growth and decay in Alaska, and the potential impact of climate change. This involves field measurements and numerical modeling.
The field investigation involves regular measurements of snow depth, snow density and snow temperature, and ice thickness. With the snow depth, snow density and snow temperature data we can calculate the temperature gradient, snow thermal conductivity and thus the conductive heat flow to the atmosphere. With such data gathered on a regular basis we can watch the snow depth and ice thickness evolve, and the heat flow vary during the course of the winter. Here in Fairbanks, "regular" means weekly for our NSF-funded study at frozen ponds at Poker Flat.
One of the objectives of making the weekly field measurements and obtaining the snow and ice temperature data is to use them to help to calibrate and validate a numerical model of lake ice growth and decay. With a well calibrated and validated model, we can simulate/investigate lake ice growth and decay anywhere in Alaska as long as there are meteorological data available to drive the model. And we can use the model to simulate the impacts of climate change on lake ice.
Teachers can be of great assistance to us, as they can obtain data from different locations around the state. These data will help us to understand the current spatial and temporal variability of ice growth and decay as determined by the weather/climate variability, and the contemporary data help with model calibration and validation. We look upon this as a mutually advantageous arrangement, as the teacher[s] become involved in a research program and learn about the nature of scientific inquiry and develop new ideas for locally relevant classroom science activities , and we obtain useful scientific data.
During fall semester 2001 and spring semester 2002, a total of 18 Fairbanks K-12 teachers participated in the fieldwork at Poker Flat. This was a requirement for a UAF class in which they enrolled: ED593, "Snow and Ice Research and Curriculum in K-12 Classrooms." In December 2001, a group of GLOBE teachers visited Aurora Pond in Fairbanks on a very cold Sunday to see what a lake ice observatory looks like. During March and April 2002, Shannon Graham, who teaches 11th and 12th grade sciences at the Washington School for the Deaf, Vancouver, WA, worked on the lake ice project under the auspices of the NSF program "Teachers Experiencing Antarctica and the Arctic (TEA)".
During March and April 2002 we also worked on Aurora Pond with home-school students, Tanana Middle School 8th grade students, and all the deaf students in Fairbanks' schools. We visited University Park Elementary School where the Gifted and Talented students and a class of 4th graders made snow measurements in the school grounds. And we went to the Howard Luke Camp with Denali Elementary School 4th and 5th graders. Conclusion: teachers and students can do lake ice and snow science, and enjoy it!
| Martin O. Jeffries Research Professor of Geophysics Geophysical Institute University of Alaska Fairbanks P. O. Box 757320 Fairbanks, AK 99775-7320 U.S.A. |
e-mail: martin.jeffries@gi.alaska.edu Phone: 907-474-5257 Fax: 907-474-7290 |
Schools that are participating in the OLCG program are invited to become involved in a tree-ring study at their school or a nearby site. The study will involve a class in the following activities:
permanently tagging trees (so we can relate each sample back to its location in the field and follow these trees in the future),
The cores will be measured at the University of Alaska Tree-Ring Lab, and classes can plot the data once they are available. The outdoor work of drilling the trees can be done as long as temperatures are above freezing or even slightly below. We would like to have about 10 good cores each from white spruce, black spruce, paper birch, and aspen from each locality. The tree-ring study is still worth doing if only 1 or 2 species are available at a site. We are trying to build a network of 10 or more new tree-ring sites.. School grounds are very good places to sample, as long as they have a reasonable chance to remain in tree cover. Otherwise, nearby natural resource properties (parks, managed forests, wildlife areas, etc.) are useable sites. Teachers should take the responsibility to get permission (if any is required) for tagging and coring trees. Background information about the minor impact of the coring on trees is available.
From this project we hope to learn the age and growth history of trees at local schools and other sites, the years of region-wide increases and decreases in tree growth, and the response of trees on different sites to recent changes in climate.
The Website for National Science Foundation Grant No. ES1-9910219
Last Modified on October 21, 2003 by Sidney Stephens