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J-DSP/ESE Laboratories for Analyzing Climate Change

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2011 ASEE Annual Conference & Exposition


Vancouver, BC

Publication Date

June 26, 2011

Start Date

June 26, 2011

End Date

June 29, 2011



Conference Session

Multidisciplinary Poster Session

Tagged Division

Multidisciplinary Engineering

Page Count


Page Numbers

22.984.1 - 22.984.14

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Paper Authors

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Karthikeyan Natesan Ramamurthy Arizona State University


Andreas S. Spanias Arizona State University, ECEE, SenSIP Center and I/UCRC

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Andreas Spanias is Professor in the School of Electrical, Computer, and Energy Engineering at Arizona State University (ASU). He is also the founder and director of the SenSIP center and industry consortium (NSF I/UCRC). His research interests are in the areas of adaptive signal processing, speech processing, and audio sensing. He and his student team developed the computer simulation software Java-DSP (J-DSP - ISBN 0-9724984-0-0). He is author of two text books: Audio Processing and Coding by Wiley and DSP; An Interactive Approach. He served as Associate Editor of the IEEE Transactions on Signal Processing and as General Co-chair of IEEE ICASSP-99. He also served as the IEEE Signal Processing Vice-President for Conferences. Andreas Spanias is co-recipient of the 2002 IEEE Donald G. Fink paper prize award and was elected Fellow of the IEEE in 2003. He served as Distinguished lecturer for the IEEE Signal processing society in 2004.

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Linda A. Hinnov Johns Hopkins University

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Linda Hinnov received her B.A. in music theory from Princeton University in 1979, M.A. in geophysics from UT, Austin in 1985, and Ph.D. in Earth sciences from Johns Hopkins University in 1994. She worked briefly in the seismic processing industry from 1979 - 1981, then at the U.S. Naval Observatory on the excitation of Earth’s polar motion, and subsequently, on the astronomical forcing of the Earth’s paleoclimate system at Johns Hopkins University, where today she is a research professor in the Department of Earth and Planetary Sciences. She has a longstanding interest in the statistical time series analysis of Earth system signals relating to past global climate change, Earth’s rotational-orbital history and tidal evolution.

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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.

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