The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Publications Copernicus
Articles | Volume XL-8
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-8, 287–290, 2014
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-8, 287–290, 2014

  28 Nov 2014

28 Nov 2014

Evaluation of NOAA Carbon Tracker Global Carbon Dioxide Products

R. K. Nayak1, E. N. Deepthi2, V. K. Dadhwal1, K. H. Rao1, and C. B. S. Dutt1 R. K. Nayak et al.
  • 1National Remote Sensing Center (NRSC), ISRO, Balanagar, Hyderabad, 500625, India
  • 2Centre for Atmosphere and Ocean Sciences, Kochin University of Science and Technology, India

Keywords: Carbon dioxide, greenhouse gas, global warming, AIRS, GOSAT, NOAA Carbon Tracker

Abstract. Inter-comparison between National Oceanic and Atmospheric Administration Carbon Tracker (NOAACT) CO2 with satellite observations were carried out in this study. The satellite observations used here are mid troposphere CO2 based on Atmosphere Infrared Sounder (AIRS) on board NASA’s Aqua and lower troposphere CO2 based on Greenhouse-gas Observing Satellite (GOSAT) of Japanese Aerospace Exploration Agency (JAXA). There exists good agreement between the seasonal cycles as estimated by NOAACT and Satellite observations. The mid troposphere CO2 exhibits distinct annual cycle in the northern hemisphere with positive detrended value during January–June and negative values during July–December. In the southern hemisphere, the annual cycle is less prominent and opposite phase with respect to the northern hemisphere. The lower tropospheric CO2 in both the hemispheres exhibits mixed signature of annual and semi-annual cycle. The amplitudes of the variability are significantly larger in the northern hemisphere than the southern hemisphere. The inter-annual variability of annual growth rates from the NOAACT is comparable with satellite observations however NOAACT could not resolved the spatial patterns of long-term growth rate as observed in the satellite observations.