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Influences of aerosols and thin cirrus clouds on GOSAT XCO2 and XCH4 using Total Carbon Column Observing Network, sky radiometer, and lidar data.
Published in:
International Journal of Remote Sensing, 2022, v. 43, n. 5, p. 1770, doi. 10.1080/01431161.2022.2038395
By:
- Trieu, Tran Thi Ngoc;
- Morino, Isamu;
- Uchino, Osamu;
- Tsutsumi, Yukitomo;
- Sakai, Tetsu;
- Nagai, Tomohiro;
- Yamazaki, Akihiro;
- Okumura, Hiroshi;
- Arai, Kohei;
- Shiomi, Kei;
- Pollard, David F.;
- Liley, Ben
Publication type:
Article
Retrievals of ..., ... and XCO from portable, near-infrared Fourier transform spectrometer solar observations in Antarctica.
Published in:
Earth System Science Data Discussions, 2022, p. 1, doi. 10.5194/essd-2022-130
By:
- Pollard, David F.;
- Hase, Frank;
- Sha, Mahesh Kumar;
- Dubravica, Darko;
- Alberti, Carlos;
- Smale, Dan
Publication type:
Article
Bias Correction of the Ratio of Total Column CH 4 to CO 2 Retrieved from GOSAT Spectra.
Published in:
Remote Sensing, 2020, v. 12, n. 19, p. 3155, doi. 10.3390/rs12193155
By:
- Oshio, Haruki;
- Yoshida, Yukio;
- Matsunaga, Tsuneo;
- Deutscher, Nicholas M.;
- Dubey, Manvendra;
- Griffith, David W. T.;
- Hase, Frank;
- Iraci, Laura T.;
- Kivi, Rigel;
- Liu, Cheng;
- Morino, Isamu;
- Notholt, Justus;
- Oh, Young-Suk;
- Ohyama, Hirofumi;
- Petri, Christof;
- Pollard, David F.;
- Roehl, Coleen;
- Shiomi, Kei;
- Sussmann, Ralf;
- Té, Yao
Publication type:
Article
Evaluation and Analysis of the Seasonal Cycle and Variability of the Trend from GOSAT Methane Retrievals.
Published in:
Remote Sensing, 2019, v. 11, n. 7, p. 882, doi. 10.3390/rs11070882
By:
- Kivimäki, Ella;
- Lindqvist, Hannakaisa;
- Hakkarainen, Janne;
- Laine, Marko;
- Sussmann, Ralf;
- Tsuruta, Aki;
- Detmers, Rob;
- Deutscher, Nicholas M.;
- Dlugokencky, Edward J.;
- Hase, Frank;
- Hasekamp, Otto;
- Kivi, Rigel;
- Morino, Isamu;
- Notholt, Justus;
- Pollard, David F.;
- Roehl, Coleen;
- Schneider, Matthias;
- Sha, Mahesh Kumar;
- Velazco, Voltaire A.;
- Warneke, Thorsten
Publication type:
Article
Evaluation of Bias Correction Methods for GOSAT SWIR XH2O Using TCCON data.
Published in:
Remote Sensing, 2019, v. 11, n. 3, p. 290, doi. 10.3390/rs11030290
By:
- Trieu, Tran Thi Ngoc;
- Morino, Isamu;
- Ohyama, Hirofumi;
- Uchino, Osamu;
- Sussmann, Ralf;
- Warneke, Thorsten;
- Petri, Christof;
- Kivi, Rigel;
- Hase, Frank;
- Pollard, David F.;
- Deutscher, Nicholas M.;
- Velazco, Voltaire A.;
- Iraci, Laura T.;
- Podolske, James R.;
- Dubey, Manvendra K.
Publication type:
Article
The Total Carbon Column Observing Network Site Description for Lauder, New Zealand.
Published in:
2017
By:
- Pollard, David F.;
- Sherlock, Vanessa;
- Robinson, John;
- Deutscher, Nicholas M.;
- Connor, Brian;
- Shiona, Hisako
Publication type:
Abstract
Retrievals of XCO2, XCH4 and XCO from portable, near-infrared Fourier transform spectrometer solar observations in Antarctica.
Published in:
Earth System Science Data, 2022, v. 14, n. 12, p. 5427, doi. 10.5194/essd-14-5427-2022
By:
- Pollard, David F.;
- Hase, Frank;
- Sha, Mahesh Kumar;
- Dubravica, Darko;
- Alberti, Carlos;
- Smale, Dan
Publication type:
Article
Quality Evaluation of the Column-Averaged Dry Air Mole Fractions of Carbon Dioxide and Methane Observed by GOSAT and GOSAT-2.
Published in:
SOLA, 2023, v. 19, p. 173, doi. 10.2151/sola.2023-023
By:
- Yukio Yoshida;
- Yu Someya;
- Hirofumi Ohyama;
- Isamu Morino;
- Tsuneo Matsunaga;
- Deutscher, Nicholas M.;
- Griffith, David W. T.;
- Hase, Frank;
- Iraci, Laura T.;
- Kivi, Rigel;
- Notholt, Justus;
- Pollard, David F.;
- Yao Té;
- Velazco, Voltaire A.;
- Wunch, Debra
Publication type:
Article
A Geostatistical Framework for Quantifying the Imprint of Mesoscale Atmospheric Transport on Satellite Trace Gas Retrievals.
Published in:
Journal of Geophysical Research. Atmospheres, 2019, v. 124, n. 17/18, p. 9773, doi. 10.1029/2018JD029933
By:
- Torres, Anthony D.;
- Keppel‐Aleks, Gretchen;
- Doney, Scott C.;
- Fendrock, Michaela;
- Luis, Kelly;
- De Mazière, Martine;
- Hase, Frank;
- Petri, Christof;
- Pollard, David F.;
- Roehl, Coleen M.;
- Sussmann, Ralf;
- Velazco, Voltaire A.;
- Warneke, Thorsten;
- Wunch, Debra
Publication type:
Article
Long-term column-averaged greenhouse gas observations using a COCCON spectrometer at the high surface albedo site Gobabeb, Namibia.
Published in:
Atmospheric Measurement Techniques Discussions, 2021, p. 1, doi. 10.5194/amt-2020-444
By:
- Frey, Matthias M.;
- Hase, Frank;
- Blumenstock, Thomas;
- Dubravica, Darko;
- GroÃŸ, Jochen;
- GÃ¶ttsche, Frank;
- Handjaba, Martin;
- Amadhila, Petrus;
- Mushi, Roland;
- Morino, Isamu;
- Shiomi, Kei;
- Kumar Sha, Mahesh;
- de MaziÃ¨re, Martine;
- Pollard, David F.
Publication type:
Article
The Adaptable 4A Inversion (5AI): Description and first XCO2 retrievals from OCO-2 observations.
Published in:
Atmospheric Measurement Techniques Discussions, 2020, p. 1, doi. 10.5194/amt-2020-403
By:
- Dogniaux, Matthieu;
- Crevoisier, Cyril;
- Armante, Raymond;
- Capelle, Virginie;
- Delahaye, Thibault;
- Cassé, Vincent;
- De Mazière, Martine;
- Deutscher, Nicholas M.;
- Feist, Dietrich G.;
- Garcia, Omaira E.;
- Griffith, David W. T.;
- Hase, Frank;
- Iraci, Laura T.;
- Kivi, Rigel;
- Morino, Isamu;
- Notholt, Justus;
- Pollard, David F.;
- Roehl, Coleen M.;
- Shiomi, Kei;
- Strong, Kimberly
Publication type:
Article
Intercomparison of TCCON data from two Fourier transform spectrometers at Lauder, New Zealand.
Published in:
Atmospheric Measurement Techniques Discussions, 2020, p. 1, doi. 10.5194/amt-2020-367
By:
- Pollard, David F.;
- Robinson, John;
- Shiona, Hisako;
- Smale, Dan
Publication type:
Article
Methane retrieved from TROPOMI: improvement of the data product and validation of the first two years of measurements.
Published in:
Atmospheric Measurement Techniques Discussions, 2020, p. 1, doi. 10.5194/amt-2020-281
By:
- Lorente, Alba;
- Borsdorff, Tobias;
- Butz, Andre;
- Hasekamp, Otto;
- de Brugh, Joost aan;
- Schneider, Andreas;
- 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
Publication type:
Article
Interannual variability in the Australian carbon cycle over 2015-2019, based on assimilation of OCO-2 satellite data.
Published in:
Atmospheric Chemistry & Physics Discussions, 2022, p. 1, doi. 10.5194/acp-2022-15
By:
- Villalobos, Yohanna;
- Rayner, Peter J.;
- Silver, Jeremy D.;
- Thomas, Steven;
- Haverd, Vanessa;
- Knauer, Jürgen;
- Loh, Zoë M.;
- Deutscher, Nicholas M.;
- Griffith, David W.T.;
- Pollard, David F.
Publication type:
Article
Interannual variability in the Australian carbon cycle over 2015–2019, based on assimilation of Orbiting Carbon Observatory-2 (OCO-2) satellite data.
Published in:
Atmospheric Chemistry & Physics, 2022, v. 22, n. 13, p. 8897, doi. 10.5194/acp-22-8897-2022
By:
- Villalobos, Yohanna;
- Rayner, Peter J.;
- Silver, Jeremy D.;
- Thomas, Steven;
- Haverd, Vanessa;
- Knauer, Jürgen;
- Loh, Zoë M.;
- Deutscher, Nicholas M.;
- Griffith, David W. T.;
- Pollard, David F.
Publication type:
Article
Was Australia a sink or source of CO2 in 2015? Data assimilation using OCO-2 satellite measurements.
Published in:
Atmospheric Chemistry & Physics, 2021, v. 21, n. 23, p. 17453, doi. 10.5194/acp-21-17453-2021
By:
- Villalobos, Yohanna;
- Rayner, Peter J.;
- Silver, Jeremy D.;
- Thomas, Steven;
- Haverd, Vanessa;
- Knauer, Jürgen;
- Loh, Zoë M.;
- Deutscher, Nicholas M.;
- Griffith, David W. T.;
- Pollard, David F.
Publication type:
Article
TCCON and NDACC XCO measurements: difference, discussion and application.
Published in:
Atmospheric Measurement Techniques Discussions, 2019, p. 1, doi. 10.5194/amt-2019-266
By:
- Minqiang Zhou;
- Langerock, Bavo;
- Vigouroux, Corinne;
- Sha, Mahesh Kumar;
- Hermans, Christian;
- Metzger, Jean-Marc;
- Huilin Chen;
- Ramonet, Michel;
- Kivi, Rigel;
- Heikkinen, Pauli;
- Smale, Dan;
- Pollard, David F.;
- Jones, Nicholas;
- Velazco, Voltaire A.;
- García, Omaira E.;
- Schneider, Matthias;
- Palm, Mathias;
- Warneke, Thorsten;
- De Mazière, Martine
Publication type:
Article
A scientific algorithm to simultaneously retrieve carbon monoxide and methane from TROPOMI onboard Sentinel-5 Precursor.
Published in:
Atmospheric Measurement Techniques Discussions, 2019, p. 1, doi. 10.5194/amt-2019-243
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;
- Isamu Morino;
- Notholt, Justus;
- Petri, Christof;
- Pollard, David F.;
- Roche, Sébastien;
- Kei Shiomi
Publication type:
Article
Evaluation of MOPITT version 7 joint TIR-NIR XCO retrievals with TCCON.
Published in:
Atmospheric Measurement Techniques Discussions, 2019, p. 1, doi. 10.5194/amt-2019-201
By:
- Hedelius, Jacob K.;
- Tai-Long He;
- Jones, Dylan B. A.;
- Buchholz, Rebecca R.;
- De Mazière, Martine;
- Deutscher, Nicholas M.;
- Dubey, Manvendra K.;
- Feist, Dietrich G.;
- Griffith, David W. T.;
- Hase, Frank;
- Iraci, Laura T.;
- Jeseck, Pascal;
- Kiel, Matthäus;
- Kivi, Rigel;
- Cheng Liu;
- Isamu Morino;
- Notholt, Justus;
- Young-Suk Oh;
- Hirofumi Ohyama;
- Pollard, David F.
Publication type:
Article
An inter-comparison of total column-averaged nitrous oxide between ground-based FTIR TCCON and NDACC measurements at seven sites and comparisons with the GEOS-Chem model.
Published in:
Atmospheric Measurement Techniques Discussions, 2018, p. 1, doi. 10.5194/amt-2018-340
By:
- Minqiang Zhou;
- Langerock, Bavo;
- Wells, Kelley C.;
- Millet, Dylan B.;
- Vigouroux, Corinne;
- Sha, Mahesh Kumar;
- Hermans, Christian;
- Metzger, Jean-Marc;
- Kivi, Rigel;
- Heikkinen, Pauli;
- Smale, Dan;
- Pollard, David F.;
- Jones, Nicholas;
- Deutscher, Nicholas M.;
- Blumenstock, Thomas;
- Schneider, Matthias;
- Palm, Mathias;
- Notholt, Justus;
- Hannigan, James W.;
- De MaziÞre, Martine
Publication type:
Article
Mapping carbon monoxide pollution from space down to city scales with daily global coverage.
Published in:
Atmospheric Measurement Techniques Discussions, 2018, p. 1, doi. 10.5194/amt-2018-132
By:
- Borsdorff, Tobias;
- de Brugh, Joost aan;
- Hu, Haili;
- Hasekamp, Otto;
- Sussmann, Ralf;
- Rettinger, Markus;
- Hase, Frank;
- Gross, Jochen;
- Schneider, Matthias;
- Garcia, Omaira;
- Stremme, Wolfgang;
- Grutter, Michel;
- Feist, Dietrich G.;
- Arnold, Sabrina G.;
- De Mazière, Martine;
- Sha, Mahesh Kumar;
- Pollard, David F.;
- Kiel, Matthäus;
- Roehl, Coleen;
- Wennberg, Paul O.
Publication type:
Article
Long-term column-averaged greenhouse gas observations using a COCCON spectrometer at the high-surface-albedo site in Gobabeb, Namibia.
Published in:
Atmospheric Measurement Techniques, 2021, v. 14, n. 9, p. 5887, doi. 10.5194/amt-14-5887-2021
By:
- Frey, Matthias M.;
- Hase, Frank;
- Blumenstock, Thomas;
- Dubravica, Darko;
- Groß, Jochen;
- Göttsche, Frank;
- Handjaba, Martin;
- Amadhila, Petrus;
- Mushi, Roland;
- Morino, Isamu;
- Shiomi, Kei;
- Sha, Mahesh Kumar;
- de Mazière, Martine;
- Pollard, David F.
Publication type:
Article
The Adaptable 4A Inversion (5AI): description and first XCO2 retrievals from Orbiting Carbon Observatory-2 (OCO-2) observations.
Published in:
Atmospheric Measurement Techniques, 2021, v. 14, n. 6, p. 4689, doi. 10.5194/amt-14-4689-2021
By:
- Dogniaux, Matthieu;
- Crevoisier, Cyril;
- Armante, Raymond;
- Capelle, Virginie;
- Delahaye, Thibault;
- Cassé, Vincent;
- De Mazière, Martine;
- Deutscher, Nicholas M.;
- Feist, Dietrich G.;
- Garcia, Omaira E.;
- Griffith, David W. T.;
- Hase, Frank;
- Iraci, Laura T.;
- Kivi, Rigel;
- Morino, Isamu;
- Notholt, Justus;
- Pollard, David F.;
- Roehl, Coleen M.;
- Shiomi, Kei;
- Strong, Kimberly
Publication type:
Article
Intercomparison of Total Carbon Column Observing Network (TCCON) data from two Fourier transform spectrometers at Lauder, New Zealand.
Published in:
Atmospheric Measurement Techniques, 2021, v. 14, n. 2, p. 1501, doi. 10.5194/amt-14-1501-2021
By:
- Pollard, David F.;
- Robinson, John;
- Shiona, Hisako;
- Smale, Dan
Publication type:
Article
Methane retrieved from TROPOMI: improvement of the data product and validation of the first 2 years of measurements.
Published in:
Atmospheric Measurement Techniques, 2021, v. 14, n. 1, p. 665, doi. 10.5194/amt-14-665-2021
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
Publication type:
Article
A scientific algorithm to simultaneously retrieve carbon monoxide and methane from TROPOMI onboard Sentinel-5 Precursor.
Published in:
Atmospheric Measurement Techniques, 2019, v. 12, n. 12, p. 6771, doi. 10.5194/amt-12-6771-2019
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
Publication type:
Article
TCCON and NDACC XCO measurements: difference, discussion and application.
Published in:
Atmospheric Measurement Techniques, 2019, v. 12, n. 11, p. 5979, doi. 10.5194/amt-12-5979-2019
By:
- Zhou, Minqiang;
- Langerock, Bavo;
- Vigouroux, Corinne;
- Sha, Mahesh Kumar;
- Hermans, Christian;
- Metzger, Jean-Marc;
- Chen, Huilin;
- Ramonet, Michel;
- Kivi, Rigel;
- Heikkinen, Pauli;
- Smale, Dan;
- Pollard, David F.;
- Jones, Nicholas;
- Velazco, Voltaire A.;
- García, Omaira E.;
- Schneider, Matthias;
- Palm, Mathias;
- Warneke, Thorsten;
- De Mazière, Martine
Publication type:
Article
An intercomparison of total column-averaged nitrous oxide between ground-based FTIR TCCON and NDACC measurements at seven sites and comparisons with the GEOS-Chem model.
Published in:
Atmospheric Measurement Techniques, 2019, v. 12, n. 2, p. 1393, doi. 10.5194/amt-12-1393-2019
By:
- Zhou, Minqiang;
- Langerock, Bavo;
- Wells, Kelley C.;
- Millet, Dylan B.;
- Vigouroux, Corinne;
- Sha, Mahesh Kumar;
- Hermans, Christian;
- Metzger, Jean-Marc;
- Kivi, Rigel;
- Heikkinen, Pauli;
- Smale, Dan;
- Pollard, David F.;
- Jones, Nicholas;
- Deutscher, Nicholas M.;
- Blumenstock, Thomas;
- Schneider, Matthias;
- Palm, Mathias;
- Notholt, Justus;
- Hannigan, James W.;
- De Mazière, Martine
Publication type:
Article
Mapping carbon monoxide pollution from space down to city scales with daily global coverage.
Published in:
Atmospheric Measurement Techniques, 2018, v. 11, n. 10, p. 5507, doi. 10.5194/amt-11-5507-2018
By:
- Borsdorff, Tobias;
- aan de Brugh, Joost;
- Hu, Haili;
- Hasekamp, Otto;
- Sussmann, Ralf;
- Rettinger, Markus;
- Hase, Frank;
- Gross, Jochen;
- Schneider, Matthias;
- Garcia, Omaira;
- Stremme, Wolfgang;
- Grutter, Michel;
- Feist, Dietrich G.;
- Arnold, Sabrina G.;
- De Mazière, Martine;
- Kumar Sha, Mahesh;
- Pollard, David F.;
- Kiel, Matthäus;
- Roehl, Coleen;
- Wennberg, Paul O.
Publication type:
Article
Was Australia a sink or source of CO2 in 2015? Data assimilation using OCO-2 satellite measurements.
Published in:
Atmospheric Chemistry & Physics Discussions, 2021, p. 1, doi. 10.5194/acp-2021-16
By:
- Villalobos, Yohanna;
- Rayner, Peter J.;
- Silver, Jeremy D.;
- Thomas, Steven;
- Haverd, Vanessa;
- Knauer, Jürgen;
- Loh, Zoë M.;
- Deutscher, Nicholas M.;
- Griffith, David W.T.;
- Pollard, David F.
Publication type:
Article

Found: 30

Influences of aerosols and thin cirrus clouds on GOSAT XCO<sub>2</sub> and XCH<sub>4</sub> using Total Carbon Column Observing Network, sky radiometer, and lidar data.

Retrievals of ..., ... and X<sub>CO</sub> from portable, near-infrared Fourier transform spectrometer solar observations in Antarctica.

Bias Correction of the Ratio of Total Column CH 4 to CO 2 Retrieved from GOSAT Spectra.

Evaluation and Analysis of the Seasonal Cycle and Variability of the Trend from GOSAT Methane Retrievals.

Evaluation of Bias Correction Methods for GOSAT SWIR XH2O Using TCCON data.

The Total Carbon Column Observing Network Site Description for Lauder, New Zealand.

Retrievals of XCO2, XCH4 and XCO from portable, near-infrared Fourier transform spectrometer solar observations in Antarctica.

Quality Evaluation of the Column-Averaged Dry Air Mole Fractions of Carbon Dioxide and Methane Observed by GOSAT and GOSAT-2.

A Geostatistical Framework for Quantifying the Imprint of Mesoscale Atmospheric Transport on Satellite Trace Gas Retrievals.

Long-term column-averaged greenhouse gas observations using a COCCON spectrometer at the high surface albedo site Gobabeb, Namibia.

The Adaptable 4A Inversion (5AI): Description and first XCO<sub>2</sub> retrievals from OCO-2 observations.

Intercomparison of TCCON data from two Fourier transform spectrometers at Lauder, New Zealand.

Methane retrieved from TROPOMI: improvement of the data product and validation of the first two years of measurements.

Interannual variability in the Australian carbon cycle over 2015-2019, based on assimilation of OCO-2 satellite data.

Interannual variability in the Australian carbon cycle over 2015–2019, based on assimilation of Orbiting Carbon Observatory-2 (OCO-2) satellite data.

Was Australia a sink or source of CO2 in 2015? Data assimilation using OCO-2 satellite measurements.

TCCON and NDACC X<sub>CO</sub> measurements: difference, discussion and application.

A scientific algorithm to simultaneously retrieve carbon monoxide and methane from TROPOMI onboard Sentinel-5 Precursor.

Evaluation of MOPITT version 7 joint TIR-NIR XCO retrievals with TCCON.

An inter-comparison of total column-averaged nitrous oxide between ground-based FTIR TCCON and NDACC measurements at seven sites and comparisons with the GEOS-Chem model.

Mapping carbon monoxide pollution from space down to city scales with daily global coverage.

Long-term column-averaged greenhouse gas observations using a COCCON spectrometer at the high-surface-albedo site in Gobabeb, Namibia.

The Adaptable 4A Inversion (5AI): description and first XCO2 retrievals from Orbiting Carbon Observatory-2 (OCO-2) observations.

Intercomparison of Total Carbon Column Observing Network (TCCON) data from two Fourier transform spectrometers at Lauder, New Zealand.

Methane retrieved from TROPOMI: improvement of the data product and validation of the first 2 years of measurements.

A scientific algorithm to simultaneously retrieve carbon monoxide and methane from TROPOMI onboard Sentinel-5 Precursor.

TCCON and NDACC XCO measurements: difference, discussion and application.

An intercomparison of total column-averaged nitrous oxide between ground-based FTIR TCCON and NDACC measurements at seven sites and comparisons with the GEOS-Chem model.

Mapping carbon monoxide pollution from space down to city scales with daily global coverage.

Was Australia a sink or source of CO<sub>2</sub> in 2015? Data assimilation using OCO-2 satellite measurements.