Search Results - "Velazco, V A"

Atmospheric greenhouse gases retrieved from SCIAMACHY: comparison to ground-based FTS measurements and model results by Schneising, O, Bergamaschi, P, Bovensmann, H, Buchwitz, M, Burrows, J. P, Deutscher, N. M, Griffith, D. W. T, Heymann, J, Macatangay, R, Messerschmidt, J, Notholt, J, Rettinger, M, Reuter, M, Sussmann, R, Velazco, V. A, Warneke, T, Wennberg, P. O, Wunch, D

“…SCIAMACHY onboard ENVISAT (launched in 2002) enables the retrieval of global long-term column-averaged dry air mole fractions of the two most important…”
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Mapping spectroscopic uncertainties into prospective methane retrieval errors from Sentinel-5 and its precursor by Checa-Garcia, R, Landgraf, J, Galli, A, Hase, F, Velazco, V. A, Tran, H, Boudon, V, Alkemade, F, Butz, A

“…Sentinel-5 (S5) and its precursor (S5P) are future European satellite missions aiming at global monitoring of methane (CH4) column-average dry air mole…”
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Consistent satellite XCO2 retrievals from SCIAMACHY and GOSAT using the BESD algorithm by Heymann, J, Reuter, M, Hilker, M, Buchwitz, M, Schneising, O, Bovensmann, H, Burrows, J P, Kuze, A, Suto, H, Deutscher, N M, Dubey, M K, Griffith, D W T, Hase, F, Kawakami, S, Kivi, R, Morino, I, Petri, C, Roehl, C, Schneider, M, Sherlock, V, Sussmann, R, Velazco, V A, Warneke, T, Wunch, D

“…Consistent and accurate long-term data sets of global atmospheric concentrations of carbon dioxide (CO2) are required for carbon cycle and climate-related…”
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Towards space based verification of CO2 emissions from strong localized sources: fossil fuel power plant emissions as seen by a CarbonSat constellation by Velazco, V A, Buchwitz, M, Bovensmann, H, Reuter, M, Schneising, O, Heymann, J, Krings, T, Gerilowski, K, Burrows, J P

“…Carbon dioxide (CO2 ) is the most important man-made greenhouse gas (GHG) that cause global warming. With electricity generation through fossil-fuel power…”
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Using XCO2 retrievals for assessing the long-term consistency of NDACC/FTIR data sets by Barthlott, S, Schneider, M, Hase, F, Wiegele, A, Christner, E, Gonzalez, Y, Blumenstock, T, Dohe, S, Garcia, O E, Sepulveda, E, Strong, K, Mendonca, J, Weaver, D, Palm, Mathias, Deutscher, N M, Warneke, T, Notholt, Justus, Lejeune, Bernard, Mahieu, Emmanuel, Jones, N, Griffith, D W T, Velazco, V A, Smale, D, Robinson, J, Kivi, R, Heikkinen, P, Raffalski, U

“…Within the NDACC (Network for the Detection of Atmospheric Composition Change), more than 20 FTIR (Fourier-transform infrared) spectrometers, spread worldwide,…”
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Drivers of column-average CO2 variability at Southern Hemispheric Total Carbon Column Observing Network sites by Deutscher, N M, Sherlock, V, Fletcher, S E. Mikaloff, Griffith, D W. T, Notholt, J, Macatangay, R, Connor, B J, Robinson, J, Shiona, H, Velazco, V A, Wang, Y, Wennberg, P O, Wunch, D

“…We investigate factors that drive the variability in total column CO2 at the Total Carbon Column Observing Network sites in the Southern Hemisphere using…”
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SCIAMACHY WFM-DOAS XCO2: comparison with CarbonTracker XCO2 focusing on aerosols and thin clouds by Heymann, J, Schneising, O, Reuter, M, Buchwitz, M, Rozanov, V V, Velazco, V A, Bovensmann, H, Burrows, J P

“…Carbon dioxide (CO2 ) is the most important greenhouse gas whose atmospheric loading has been significantly increased by anthropogenic activity leading to…”
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Estimating global and North American methane emissions with high spatial resolution using GOSAT satellite data by Turner, A. J, Jacob, D. J, Wecht, K. J, Maasakkers, J. D, Lundgren, E, Andrews, A. E, Biraud, S. C, Boesch, H, Bowman, K. W, Deutscher, N. M, Dubey, M. K, Griffith, D. W. T, Hase, F, Kuze, A, Notholt, J, Ohyama, H, Parker, R, Payne, V. H, Sussmann, R, Sweeney, C, Velazco, V. A, Warneke, T, Wennberg, P. O, Wunch, D

“…We use 2009–2011 space-borne methane observations from the Greenhouse Gases Observing SATellite (GOSAT) to estimate global and North American methane emissions…”
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The Carbon Cycle of Southeast Australia During 2019–2020: Drought, Fires, and Subsequent Recovery by Byrne, B., Liu, J., Lee, M., Yin, Y., Bowman, K. W., Miyazaki, K., Norton, A. J., Joiner, J., Pollard, D. F., Griffith, D. W. T., Velazco, V. A., Deutscher, N. M., Jones, N. B., Paton‐Walsh, C.

“…2019 was the hottest and driest year on record for southeast Australia leading to bushfires of unprecedented extent. Ecosystem carbon losses due to drought and…”
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Toward High Precision XCO2 Retrievals From TanSat Observations: Retrieval Improvement and Validation Against TCCON Measurements by Yang, D., Boesch, H., Liu, Y., Somkuti, P., Cai, Z., Chen, X., Di Noia, A., Lin, C., Lu, N., Lyu, D., Parker, R. J., Tian, L., Wang, M., Webb, A., Yao, L., Yin, Z., Zheng, Y., Deutscher, N. M., Griffith, D. W. T., Hase, F., Kivi, R., Morino, I., Notholt, J., Ohyama, H., Pollard, D. F., Shiomi, K., Sussmann, R., Té, Y., Velazco, V. A., Warneke, T., Wunch, D.

“…TanSat is the 1st Chinese carbon dioxide (CO2) measurement satellite, launched in 2016. In this study, the University of Leicester Full Physics (UoL‐FP)…”
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Improved Constraints on Northern Extratropical CO2 Fluxes Obtained by Combining Surface‐Based and Space‐Based Atmospheric CO2 Measurements by Byrne, B., Liu, J., Lee, M., Baker, I., Bowman, K. W., Deutscher, N. M., Feist, D. G., Griffith, D. W. T., Iraci, L. T., Kiel, M., Kimball, J. S., Miller, C. E., Morino, I., Parazoo, N. C., Petri, C., Roehl, C. M., Sha, M. K., Strong, K., Velazco, V. A., Wennberg, P. O., Wunch, D.

“…Top‐down estimates of CO2 fluxes are typically constrained by either surface‐based or space‐based CO2 observations. Both of these measurement types have…”
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Characterization and potential for reducing optical resonances in Fourier transform infrared spectrometers of the Network for the Detection of Atmospheric Composition Change (NDACC) by Blumenstock, Thomas, Hase, Frank, Keens, Axel, Czurlok, Denis, Colebatch, Orfeo, Garcia, Omaira, Griffith, David W. T, Grutter, Michel, Hannigan, James W, Heikkinen, Pauli, Jeseck, Pascal, Jones, Nicholas, Kivi, Rigel, Lutsch, Erik, Makarova, Maria, Imhasin, Hamud K, Mellqvist, Johan, Morino, Isamu, Nagahama, Tomoo, Notholt, Justus, Ortega, Ivan, Palm, Mathias, Raffalski, Uwe, Rettinger, Markus, Robinson, John, Schneider, Matthias, Servais, Christian, Smale, Dan, Stremme, Wolfgang, Strong, Kimberly, Sussmann, Ralf, Té, Yao, Velazco, Voltaire A

“…Although optical components in Fourier transform infrared (FTIR) spectrometers are preferably wedged, in practice, infrared spectra typically suffer from the…”
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Drivers of column-average CO 2 variability at Southern Hemispheric Total Carbon Column Observing Network sites by Deutscher, N. M., Sherlock, V., Mikaloff Fletcher, S. E., Griffith, D. W. T., Notholt, J., Macatangay, R., Connor, B. J., Robinson, J., Shiona, H., Velazco, V. A., Wang, Y., Wennberg, P. O., Wunch, D.

“…We investigate factors that drive the variability in total column CO2 at the Total Carbon Column Observing Network sites in the Southern Hemisphere using…”
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Toward High Precision XCO 2 Retrievals From TanSat Observations: Retrieval Improvement and Validation Against TCCON Measurements by Yang, D, Boesch, H, Liu, Y, Somkuti, P, Cai, Z, Chen, X, Di Noia, A, Lin, C, Lu, N, Lyu, D, Parker, R J, Tian, L, Wang, M, Webb, A, Yao, L, Yin, Z, Zheng, Y, Deutscher, N M, Griffith, D W T, Hase, F, Kivi, R, Morino, I, Notholt, J, Ohyama, H, Pollard, D F, Shiomi, K, Sussmann, R, Té, Y, Velazco, V A, Warneke, T, Wunch, D

“…TanSat is the 1st Chinese carbon dioxide (CO ) measurement satellite, launched in 2016. In this study, the University of Leicester Full Physics (UoL-FP)…”
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Methane retrieved from TROPOMI: improvement of the data product and validation of the first 2 years of measurements by Lorente, Alba, Borsdorff, Tobias, Butz, Andre, Hasekamp, Otto, aan de Brugh, Joost, Schneider, Andreas, Wu, Lianghai, Hase, Frank, Kivi, Rigel, Wunch, Debra, Pollard, David F, Shiomi, Kei, Deutscher, Nicholas M, Velazco, Voltaire A, Roehl, Coleen M, Wennberg, Paul O, Warneke, Thorsten, Landgraf, Jochen

“…The TROPOspheric Monitoring Instrument (TROPOMI) on board the Sentinel 5 Precursor (S5-P) satellite provides methane (CH4) measurements with high accuracy and…”
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The transition to new ozone absorption cross sections for Dobson and Brewer total ozone measurements by Voglmeier, Karl, Velazco, Voltaire A, Egli, Luca, Gröbner, Julian, Redondas, Alberto, Steinbrecht, Wolfgang

“…Comparisons between total ozone column (TOC) measurements from ground-based Dobson and Brewer spectrophotometers and from various satellite instruments…”
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A scientific algorithm to simultaneously retrieve carbon monoxide and methane from TROPOMI onboard Sentinel-5 Precursor by Schneising, Oliver, Buchwitz, Michael, Reuter, Maximilian, Bovensmann, Heinrich, Burrows, John P, Borsdorff, Tobias, Deutscher, Nicholas M, Feist, Dietrich G, Griffith, David W. T, Hase, Frank, Hermans, Christian, Iraci, Laura T, Kivi, Rigel, Landgraf, Jochen, Morino, Isamu, Notholt, Justus, Petri, Christof, Pollard, David F, Roche, Sébastien, Shiomi, Kei, Strong, Kimberly, Sussmann, Ralf, Velazco, Voltaire A, Warneke, Thorsten, Wunch, Debra

“…Carbon monoxide (CO) is an important atmospheric constituent affecting air quality, and methane (CH4) is the second most important greenhouse gas contributing…”
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A retrieval of xCO2 from ground-based mid-infrared NDACC solar absorption spectra and comparison to TCCON by Chiarella, Rafaella, Buschmann, Matthias, Laughner, Joshua, Morino, Isamu, Notholt, Justus, Petri, Christof, Toon, Geoffrey, Velazco, Voltaire A, Warneke, Thorsten

“…Two global networks of ground-based Fourier transform spectrometers are measuring abundances of atmospheric trace gases that absorb in the near infrared and…”
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Characteristics of interannual variability in space-based XCO2 global observations by Guan, Yifan, Keppel-Aleks, Gretchen, Doney, Scott C, Petri, Christof, Pollard, Dave, Wunch, Debra, Hase, Frank, Ohyama, Hirofumi, Morino, Isamu, Notholt, Justus, Shiomi, Kei, Strong, Kim, Kivi, Rigel, Buschmann, Matthias, Deutscher, Nicholas, Wennberg, Paul, Sussmann, Ralf, Velazco, Voltaire A, Yao Té

“…Atmospheric carbon dioxide (CO2) accounts for the largest radiative forcing among anthropogenic greenhouse gases. There is, therefore, a pressing need to…”
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Characterizing model errors in chemical transport modeling of methane: using GOSAT XCH4 data with weak-constraint four-dimensional variational data assimilation by Stanevich, Ilya, Jones, Dylan B A, Strong, Kimberly, Keller, Martin, Henze, Daven K, Parker, Robert J, Boesch, Hartmut, Wunch, Debra, Notholt, Justus, Petri, Christof, Warneke, Thorsten, Sussmann, Ralf, Schneider, Matthias, Hase, Frank, Kivi, Rigel, Deutscher, Nicholas M, Velazco, Voltaire A, Walker, Kaley A, Deng, Feng

“…We examined biases in the global GEOS-Chem chemical transport model for the period of February–May 2010 using weak-constraint (WC) four-dimensional variational…”
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