Ground based in-situ measurements of carbon dioxide (CO 2) and methane (CH 4) at the dry lakebed at Railroad Valley (RRV) playa, Nevada, USA (38°30.234′ N, 115°41.604′ W, elevation 1437 m) were conducted over a five day period from 20–25 June 2010. The playa is a flat, desert site with virtually no vegetation, an overall size of 15 km × 15 km and is approximately 110 km south-west of the nearest city, Ely (elevation 1962 m, inhabitants 4000). The measurements were taken in support of the vicarious calibration experiment to validate column-averaged dry air mole fractions of CO 2 and CH 4 (X CO2 and X CH4) retrieved from the Greenhouse Gases Observing Satellite (GOSAT) which was launched in January 2009. This work reports on ground-based in-situ measurements of CO 2 and CH 4 from RRV playa and describes comparisons made between in-situ data and X CO2 and X CH4 from GOSAT.
Lorius, C.; Jouzel, J.; Raynaud, D. The Ice Core Record: Past Archive of the Climate and Signpost to the Future. In Antarctica and Environmental Change; Oxford Science Publications: Oxford, UK, 1993; pp. 27–34.
Etheridge, D.M.; Steele, L.P.; Langenfelds, R.L.; Francey, R.J. Natural and anthropogenic changes in atmospheric CO2 over the last 1000 years from air in Arctic ice and firn. J. Geophys. Res. 1996, 101, 4115–4128.
WMO Secretariat. WMO Greenhouse Gas Bulletin: The State of Greenhouse Gases in the Atmosphere Based on Global Observations through 2009, 2010. World Meteorological Organization Available online: http://www.wmo.int/pages/prog/arep/gaw/ghg/documents/GHG_bull_6en.pdf (accessed on 23 September 2011).
Kuze, A.; Suto, H.; Nakajima, M.; Hamazaki, T. Thermal and near infrared sensor for carbon observation Fourier-transform spectrometer on the Greenhouse Gases Observing Satellite for greenhouse gases monitoring. Appl. Opt. 2009, 48, 6716–6733.
Yokota, T.; Yoshida, Y.; Eguchi, N.; Tanaka, T.; Watanabe, H.; Maksyutov, S. Global concentrations of CO2 and CH4 retrieved from GOSAT: First preliminary results. Sci. Online Lett. Atmos. 2009, 5, 160–163.
Zhou, L.X.; Worthy, D.E.J.; Lang, P.M.; Ernst, M.K.; Zhang, X.C.; Wen, Y.P.; Li, J.L. Ten years of atmospheric methane observations at a high elevation site in Western China. Atmos. Environ. 2004, 38, 7041–7054.
Macatangay, R.; Warneke, T.; Gerbig, C.; K？rner, S.; Ahmadov, R.; Heimann, M.; Notholt, J. A framework for comparing remotely sensed and in-situ CO2 concentrations. Atmos. Chem. Phys. 2008, 8, 1549–1588.