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NASA NTRS · 20090014180

The Orbiting Carbon Observatory (OCO)

Miller, Charles E.
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Abstract

CO2 is the principal human generated driver of climate change. Accurate forecasting of future climate requires an improved understanding of the global carbon cycle and its interaction with the climate system. The Orbiting Carbon Observatory (OCO) will make global, space-based observations of atmospheric CO2 with the precision, resolution, and coverage needed to understand sources and sinks. OCO data will provide critical information for decision makers including the scientific basis for policy formulation, guide for carbon management strategies and treaty monitoring.

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Miller, Charles E.. 2005-05-01. The Orbiting Carbon Observatory (OCO). https://ntrs.nasa.gov/citations/20090014180

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Sampling Biases of Space-Based Observations of XCO2 Associated With South American Biomass Burning Events During 2017-2020

- We examine time series of OCO-2 xCO 2 observations coincident with other remotely sensed and in-situ observations to better understand external sampling effects. - The OCO-2 Level 3 assimilation product fills in gaps where OCO-2 does not have observations. - Although the Level 3 clearly shows the increased CO 2 over the Amazon associated with the September 2017 biomass burning event, the total amount of CO 2 may be underestimated because of a sampling bias. - Since TCCON is also a remotely sensed product, it may suffer the same sampling biases associated with biomass burning events as OCO-2. - Aircraft data show that there is significant variation in xCO 2 with altitude. - The OCO-2 fused products created by kriging may be better than the assimilated product at detecting deviations from the average state.

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