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Monitoring ocean CO2 fluxes from space: GOSAT and OCO-2

Show simple item record Crisp, David 2013-03-15T22:57:57Z 2013-03-15T22:57:57Z 2012-07-22
dc.identifier.citation 2012 IEEE International Geoscience and Remote Sensing (IGRS), Munich, Germany, July 22-27, 2012 en_US
dc.identifier.clearanceno 12-0214
dc.description.abstract The ocean is a major component of the global carbon cycle, emitting over 330 billion tons of carbon dioxide (CO2) into the atmosphere each year, or about 10 times that emitted fossil fuel combustion and all other human activities [1, 2]. The ocean reabsorbs a comparable amount of CO2 each year, along with ~25% of the CO2 emitted by these human activities. The nature and geographic distribution of the processes controlling these ocean CO2 fluxes are still poorly constrained by observations. A better understanding of these processes is essential to predict how this important CO2 sink may evolve as the climate changes. While in situ measurements of ocean CO2 fluxes can be very precise, the sampling density is far too sparse to quantify ocean CO2 sources and sinks over much of the globe. One way to improve the spatial resolution, coverage, and sampling frequency is to make observations of the column averaged CO2 dry air mole fraction, XCO2, from space [4, 5, 6]. Such measurements could provide global coverage at high resolution (< 100 km) on monthly time scales. High precision (< 1 part per million, ppm) is essential to resolve the small, near-surface CO2 variations associated with ocean fluxes and to better constrain the CO2 transport over the ocean. The Japanese Greenhouse gases Observing Satellite (GOSAT) and the NASA Orbiting Carbon Observatory (OCO) were first two space based sensors designed specifically for this task. GOSAT was successfully launched on January 23, 2009, and has been returning measurements of XCO2 since April 2009. The OCO mission was lost in February 2009, when its launch vehicle malfunctioned and failed to reach orbit. In early 2010, NASA authorized a re-flight of OCO, called OCO-2, which is currently under development. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012. en_US
dc.subject Orbiting Carbon Observatory -2 en_US
dc.subject OCO-2 en_US
dc.subject greenhouse gases en_US
dc.subject observing satellites en_US
dc.subject GOSAT en_US
dc.subject carbon dioxide en_US
dc.title Monitoring ocean CO2 fluxes from space: GOSAT and OCO-2 en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Earth Resources and Remote Sensing en_US

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