June 26, 2011
June 26, 2011
June 29, 2011
22.984.1 - 22.984.14
J-DSP/ESE Laboratories for Analyzing Climate ChangeThe award winning Java-DSP (J-DSP) has been previously used in Electrical Engineering foreducation and research applications in signal processing. We have developed a multidisciplinaryextension to the educational online J-DSP package, the J-DSP Earth systems edition (J-DSP/ESE), which enables handling of Earth systems data relating to applications in geology,exploration, climate change and environmental assessment. In this paper we present thedevelopment of online labs using J-DSP/ESE in order to analyze climate changes in thetwentieth century and climate change in ice age. Analysis of climate change primarily involvesusing time series analysis techniques along with the careful preprocessing of the data. Wedeveloped three tutorials using the J-DSP/ESE software for this analysis and these tutorials areaimed at Earth systems students and practitioners whose familiarity with signal processing isvery limited. The first tutorial introduces signal processing concepts such as using filtering asignal to separate it from noise, and power spectral analysis. The second tutorial examines thephenomenon of global warming in the twentieth century by studying the correlation between thecarbon dioxide concentration with global temperature recorded. The J-DSP/ESE functionsinvolved in this tutorial are data preparation, power spectrum estimation using periodogram, andcoherency analysis. The third tutorial investigates the climate change during the ice age byanalyzing the biogeochemistry and abundance of phytoplanktons that lived in the ocean anddeposited in the ocean floor. This tutorial involves the use of functions such as depth to timetransformation, interpolation and resampling to uniform time scale, data preparation, andcoherency analysis. The tutorials were presented at a workshop organized by the GeologicalSociety of America and an assessment was conducted. Assessment results show that a goodmajority of students were able to comprehend the concepts introduced and became comfortablewith using J-DSP/ESE. The detailed assessment results will be presented at the conference.
Ramamurthy, K. N., & Spanias, A. S., & Hinnov, L. A. (2011, June), J-DSP/ESE Laboratories for Analyzing Climate Change Paper presented at 2011 ASEE Annual Conference & Exposition, Vancouver, BC. https://peer.asee.org/18222
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