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Voltaire A. Velazco

Group at IUP:


Current Position:

Postdoctoral Researcher

Research Interest:

Atmospheric Trace Gases Measurements, Carbon and Methane Cycle, Climate Change, Atmospheric Pollution, Energy and the Environment

Research Career:

Dr. Velazco studied Physics and worked in building up and characterizing a CO2 laser system for his Bachelor thesis. He moved to Bremen, Germany to undertake the Masters degree in Environmental Physics, where he studied aerosols and cirrus clouds using LIDAR measurements in the high Arctic (Ny Alesund, Spitsbergen). The work was in collaboration with the Uni-Bremen and the Alfred Wegener Institute.

He later investigated the transport of pollutants from biomass burning and its effect on the atmosphere, with the help of Fourier Transform Infrared Spectrometry on board the Research Vessel Polarstern, in the Arctic and in the tropics for his PhD (summa cum laude).

As a CALTECH postdoctoral scholar, he worked at NASA's Jet Propulsion Lab, California Institute of Technology, investigating the atmosphere and validating satellite instruments using JPL\'s MkIV balloon-borne interferometer. He participated in campaigns in the Arctic (Esrange) and in New Mexico. In 2010, he re-joined his alma mater, Bremen University to work under the CarbonSat project, focusing mainly on detection of power plant CO2 emissions.

Additional Information:
Selected Publications:

Velazco, V. A., M. Buchwitz, H. Bovensmann, M. Reuter, O. Schneising, J. Heymann, T. Krings, K. Gerilowski, and J. P. Burrows, Towards space based verification of CO2 emissions from strong localized sources: fossil fuel power plant emissions as seen by a CarbonSat constellation, Atmos. Meas. Tech. Discuss., 4, 5147-5182, 2011. Link: pdf

Velazco, V. A., G. C. Toon, J.-F. L. Blavier, A. Kleinbohl, G. L. Manney, W. H. Daffer, P. F. Bernath, K. A. Walker, and C. Boone (2011), Validation of the Atmospheric Chemistry Experiment by Non-coincident MkIV Balloon Profiles, J. Geophys. Res., doi:10.1029/2010JD014928.

Velazco, V.,. S. Wood, M. Sinhuber, I. Kramer, N. Jones, Y. Kasai, J. Notholt, T. Warneke, T. Blumenstock, F. Hase, F. Murcray (2007), Annual variation and global distribution of strato-mesospheric carbon monoxide measured by ground-based Fourier transform infrared spectrometry, Atmos. Chem. Phys., 7, 1305–1312.

Velazco, V., J. Notholt, T. Warneke, M. Lawrence, H. Bremer, J. Drummond, A. Schulz, J. Krieg, O. Schrems (2004), Latitude and Altitude Variability of Carbon Monoxide in the Atlantic Detected from Ship-borne Fourier Transform Spectrometry, Model and Satellite Data. J. Geophys. Res. 110, D09306, doi: 10.1029/2004JD005351.

Reuter, M., H. Bovensmann, M. Buchwitz, J. P. Burrows, B.J. Connor, N. M. Deutscher, D. W. T. Griffith, J. Heymann, G. Keppel-Aleks, J. Messerschmidt, J. Notholt, C. Petri, J. Robinson, O. Schneising, V. Sherlock, V. A. Velazco, T. Warneke, P. Wennberg, and D. Wunch (2011), Retrieval of atmospheric CO2 with enhanced accuracy and precision from Sciamachy: Validation with Fourier transform spectrometer measurements and comparison with model results, J. Geophys. Res., doi:10.1029/2010JD015047.

J. Notholt, G. C. Toon, S. Fueglistaler, P. O. Wennberg, F. W. Irion, M. McCarthy, M. Scharringhausen, T. S. Rhee, A. Kleinböhl, and V. Velazco, Trend in ice moistening the stratosphere – constraints from isotope data of water and methane, Atmos. Chem. Phys. Discuss., 9, 16973-16991, 2009.

T. Gardiner, A. Forbes, P. Woods, M. deMaziere, C. Vigouroux, E. Mahieu, P. Demoulin, V. Velazco, J. Notholt, T. Blumenstock, F. Hase, I. Kramer, R. Sussman, W. Stremme, J. Mellqvist, A. Strandberg, K. Ellingsen, and M. Gauss, Trend analysis of greenhouse gases over Europe measured by a network of ground-based remote FTIR instruments, Atmos. Chem. Phys., 8, 6719-6727, 2008.

C. Vigouroux, M. De Mazière, P. Demoulin, C. Servais, F. Hase, T. Blumenstock, I. Kramer, M. Schneider, J. Mellqvist, A. Strandberg, V. Velazco, J. Notholt, R. Sussmann, W. Stremme, A. Rockmann, T. Gardiner, M. Coleman, and P. Woods, Evaluation of tropospheric and stratospheric ozone trends over Western Europe from ground-based FTIR network observations, Atmos. Chem. Phys., 8, 6865-6886, 2008..

S. Payan, C. Camy-Peyret, H. Oelhaf, G. Wetzel, G. Maucher, C. Keim, M. Pirre, N. Huret, A. Engel, M. C. Volk, H. Kuellmann, J. Kuttippurath, U. Cortesi, G. Bianchini, F. Mencaraglia, P. Raspollini, G. Redaelli, C. Vigouroux, M. De Maziere, S. Mikuteit, T. Blumenstock, V. Velazco, J. Notholt, M. Mahieu, P. Duchatelet, D. Smale, S. Wood, N. Jones, C. Piccolo, V. Payne, A. Bracher, N. Glatthor, G. Stiller, K. Grunow, P. Jeseck, Y. Te, K. Pfeilsticker, and A. Butz, Validation and data characteristics of methane and nitrous oxide profiles observed by MIPAS and processed with Version 4.61 algorithm, Atmos Chem. Phys. Disc, 2007, Vol.7, pp. 18043-18111 SRef-ID: 1680-7375/acpd/2007-7-18043.

T. Warneke, J.F. Meirink, J-U. Grooss, J. Notholt, G.C. Toon, V. Velazco, A.P.H. Goede and O.Schrems (2006), Ground based solar absorption measurements of CH4 – seasonal and latitudinal variation, Geophys. Res. Lett.,33, L14812, doi:10.1029/2006GL025874.

B. Dils, M. De Maziere, J. F. Mueller, T. Blumenstock, M. Buchwitz, R. de Beek, P. Demoulin, P. Duchatelet, H. Fast, C. Frankenberg, A. Gloudemans, D. Griffith, N. Jones, T. Kerzenmacher, I. Kramer, E. Mahieu, J. Mellqvist, R. L. Mittermeier, J. Notholt, C. P. Rinsland1, H. Schrijver, D. Smale, A. Strandberg, A. G. Straume, W. Stremme, K. Strong, R. Sussmann, J. Taylor, M. van den Broek, V. Velazco, T.Wagner, T.Warneke, A.Wiacek, and S.Wood (2006), Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N2O, Atmos. Chem. Phys., 6, 1953–1976.

T. Warneke, Z. Yang, S. Olsen, S. Koerner, J. Notholt, G. C. Toon, V. Velazco, A. Schulz and O. Schrems (2005), Seasonal and latitudinal variations of column averaged volume-mixing ratios of atmospheric CO2, Geophys Res. Letters, 32, L03808, doi:10.1029/2004GL021597.

M. Palm, C. v. Savigny, T. Warneke, V. Velazco, J. Notholt and K. Kuenzi, Intercomparison of O3 Profiles observed by SCIAMACHY (2004), Ground-based Microwave and FTIR Instruments, Atmos. Chem. Phys., 5, 2091–2098, 2005.

L. N. Yurganov, P. Duchatelet, A. V. Dzhola, D. P. Edwards, F. Hase, I. Kramer, E. Mahieu, J. Mellqvist, J. Notholt, P. C. Novelli, A. Rockmann, H. E. Scheel, M. Schneider, A. Schulz, A. Strandberg, R. Sussmann, H. Tanimoto, V. Velazco, J. R. Drummond, and J. C. Gille, Increased Northern Hemispheric carbon monoxide burden in the troposphere in 2002 and 2003 detected from the ground and from space, Atmos. Chem. Phys., 5, 563–573, 2005.

M. De Maziere, C. Vigoroux, T. Gardiner, M. Coleman, P. Woods, K. Ellingsen, M. Gauss, I. Isaksen, T. Blumenstock, F. Hase, I. Kramer, C. Camy-Peyret, P. Chelin, E. Mahieu, P. Demoulin, P. Duchatelet, J. Mellqvist, A. Strandberg, V. Velazco, J. Notholt, R. Sussmann, W. Stremme, A. Rockmann (2005), The exploitation of ground-based Fourier transform infrared observations for the evaluation of tropospheric trends of greenhouse gases over Europe, Env. Sci, 2(2-3): 283-293.

L. N. Yurganov, T. Blumenstock, E. I Grechko, F. Hase, E. J. Hyer, E. S. Kasischke, M. Koike, Y. Kondo, I. Kramer, F.-Y. Leung, E. Mahieu, J. Mellqvist, J. Notholt, P. C. Novelli, C. P. Rinsland, H. E. Scheel, A. Schulz, A. Strandberg, R. Sussmann, H. Tanimoto, V. Velazco, R. Zander and Y. Zhao (2004), A Quantitative Assessment of the 1998 Carbon Monoxide Emission Anomaly in the Northern Hemisphere Based on Total Column and Surface Concentration Measurements. J. Geophys. Res., vol. 109, No. D15, DI5305
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