Global atmospheric carbon budget: results from an ensemble of atmospheric CO<sub>2</sub> inversions

Global atmospheric carbon budget : results from an e semble of atmo pheric CO 2 inversions

Global atmospheric black carbon inferred from AERONET.

AERONET, a network of well calibrated sunphotometers, provides data on aerosol optical depth and absorption optical depth at >250 sites around the world. The spectral range of AERONET allows discrimination between constituents that absorb most strongly in the UV region, such as soil dust and organic carbon, and the more ubiquitously absorbing black carbon (BC). AERONET locations, primarily cont...

Global atmospheric methane: budget, changes and dangers.

A factor of 2.5 increase in the global abundance of atmospheric methane (CH(4)) since 1750 contributes 0.5 Wm(-2) to total direct radiative forcing by long-lived greenhouse gases (2.77 Wm(-2) in 2009), while its role in atmospheric chemistry adds another approximately 0.2 Wm(-2) of indirect forcing. Since CH(4) has a relatively short lifetime and it is very close to a steady state, reductions i...

An improved Kalman Smoother for atmospheric inversions

We explore the use of a fixed-lag Kalman smoother for sequential estimation of atmospheric carbon dioxide fluxes. This technique takes advantage of the fact that most of the information about the spatial distribution of sources and sinks is observable within a few months to half of a year of emission. After this period, the spatial structure of sources is diluted by transport and cannot signifi...

Atmospheric chloromethane budget

New insight into the atmospheric chloromethane budget gained using stable carbon isotope ratios F. Keppler, D. B. Harper, T. Röckmann, R. M. Moore, and J. T. G. Hamilton School of Agriculture and Food Science, Queen’s University Belfast, Newforge Lane, Belfast BT9 5PX, UK Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany Department of Oceanography, Dalhousie Unive...