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Seminars

The Carbon Club: Measuring and Mapping Carbon Dioxide from Remote Sensing Satellite Data

  • 2017-05-22 (Mon.), 10:30 AM
  • Recreation Hall, 2F, Institute of Statistical Science
  • Distinguished Professor Noel Cressie
  • Centre for Environmental Informatics, University of Wollongong, Australia

Abstract

This talk is about environmental informatics for global remote sensing of atmospheric carbon dioxide, a leading greenhouse gas. An important compartment of the carbon cycle is atmospheric carbon dioxide (CO2), where it (and other gases) contribute to climate change through a greenhouse effect. There are CO2 observational programs where measurements are made at a small number of ground-based locations at somewhat regular time intervals. In contrast, satellite-based programs are spatially global but do not have the temporal richness. A recent satellite launched to measure CO2 is NASA's Orbiting Carbon Observatory-2 (OCO-2), whose principal objective is to retrieve a geographical distribution of CO2 sources and sinks. OCO-2’s measurement of column-averaged mole fraction, XCO2, is designed to achieve this, through a data-assimilation procedure that is statistical at its basis. Consequently, uncertainty quantification is key, starting with retrieval of the atmospheric state from each individual sounding, to mapping the state with spatial-statistical models, to flux-inversion using flux-process models.

Update:2024-12-10 15:57
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