Research Interests

My primary research area continues to be about understanding the Carbon cycle focusing on atmospheric measurements (continuous and flasks samples) at a condimental site located in the Southern Great Plains of the US. This site is part of the ARM (Atmospheric Radiation Measurements) Climate Research Facility (ACRF) domain. The carbon measurement and analysis activities that I contribute to include: (1) carbon eddy flux systems; (2) continuous high-accuracy CO2 measurements and CO2 isotope collection; (3) aircraft and tower flask contributions to the NOAA Climate Monitoring Diagnostic Laboratory global network; (4) continuous high-accuracy CO measurements; (5) continuous high-accuracy aircraft measurements.

Education

Ph.D. (1997-2000) at University PARIS VII, and at the LSCE laboratory of CEA, France: "Towards the regionalisation of sources and sinks of greenhouse gases: analysis of the synoptic variability at Mace Head observatory, Ireland".

Publications

1. Angert A., S. Biraud, C. Bonfils, C. Henning, W. Buermann, J. Pinzon, C.J. Tucker, and I. Fung. Drier summers cancel out the CO2 uptake enhancement induced by warmer springs, Proceedings of the National Academy of Sciences, 102, 10823-10827, 2005
2. Bonfils C., A. Angert, C. Henning, S. Biraud, S.C. Doney, and I. Fung. Extending the record of photosynthetic activity in the eastern United States into the pre-satellite period using surface diurnal temperature range, Geophysical Research Letters., 32, L08405, 2005
3. Angert A., S. Biraud, C. Bonfils, W. Buermann, and I. Fung. CO2 seasonality indicates origins of post-Pinatubo sink, G eophysical Research Letters, 31, L11103, 2004
4. Ramonet M., P. Ciais, I. Nepomniachii, K. Sidorov, R.E.M. Neubert, D. Picard, V. Kazan, S. Biraud, M. Gusti, E.D. Schulze and J. Lloyd. Three years of aircraft based trace gas measurements over Fyodoroskye southern taiga forest, 300 km North-West of Moscow, Tellus, 54B, 713-734, 2002
5. Biraud S., P. Ciais, M. Ramonet, P. Simmonds, V. Kazan, P. Monfray, S. O'Doherty, T. G. Spain and S. G. Jennings. Sources of Carbon Dioxide, Methane, Nitrous Oxide, and Chloroform over Ireland inferred from Radon 222 and Radon 220 at Mace-Head, Tellus B, Vol. 54, 41-60, 2002
6. Derwent R. G., D. B. Ryall, A. J. Manning, P. G. Simmonds, S. O'Doherty, S. Biraud, P. Ciais, M. Ramonet and S. G. Jennings, Continuous observations of carbon dioxide at Mace Head, Ireland from 1994-1999 and its net European ecosystem exchange, Atmopsheric Environnement, 36, 2799-2807, 2002
7. Biraud S., P. Ciais, M. Ramonet, P. Simmonds, V. Kazan, P. Monfray, S. O'Doherty, T. G. Spain and S. G. Jennings., European greenhouse gas emissions estimated from continuous atmospheric measurements and radon 222 at Mace Head, Ireland, Journal of Geophysical Research, 105, 1351-1366, 2000