|Posters prepared by Laramie K-12 students on display in the main |
atrium of the USGS EROS Data Center, Sioux Falls, SD
Arundathi Nair, an 5th grader in the Spring Creek Elementary School explored whether man-made surfaces (roads and concrete pavement) were hotter than a natural surface (grass lawn). Her measurements taken at 10 am, 1 pm, and 6 pm revealed that temperature of all surfaces rose to their maximum values at 1 pm. The temperature of the road was higher than that of concrete pavement. Grass surface had the lowest temperature, which led her to conclude that man-made surfaces were hotter than natural surfaces.
|Tire mulch mat installed in this park recorded an |
average temperature of 65°C (150 °F) at noon, while the
average temperature of the grass lawn and concrete
pavement were 34°C and 25°C respectively
|Changes in the Normalized Difference Vegetation Index |
values of aspen and cottonwood leaves sampled in Laramie, WY
Mrudhula Baskaran a 10th grader at Laramie High School monitored spectral reflectance changes in aspen and cottonwood leaves. Using an Alta II Reflectance Spectrometer she measured the spectral reflectance values of 10 leaves from each tree and computed the Normalized Difference Vegetation Index (NDVI). She repeated these experiments on the 24th August, and the 2nd and 9th of September, 2012. While the NDVI values of aspen trees declined during this period, the cottonwood trees showed no change. This study helped her to see the relationship between the changes in leaf color and reflectance.
Acknowledgements:Thanks to Dr. Alan Buss, University of Wyoming, for loaning the infrared thermometer and Alta Spectroradiometer, and Dr. Kevin Czajkowski, University of Toledo, for providing the infrared thermometer used in these studies.