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Junjie Liu

Photo of Junjie Liu

Address:

4800 Oak Grove Drive
M/S 233-200

Pasadena, CA 91109

Phone:

818.354.0059

Curriculum Vitae:

Click here

Member of:

Carbon Cycle And Ecosystems

Principal Scientist

Education

  • Ph. D, December 2007: University of Maryland-College Park.
  • M. S., Spring 2003: Nanjing Institute of Meteorology, China
  • B. S., 2000: Nanjing Institute of Meteorology, China.

Professional Experience

  • Science Team Lead for Orbiting Carbon Observatory-2/3, Jan 2024-
  • Senior Research Scientist, May 2023-
  • Principal Scientist, Oct 2022-
  • Acting Science Team Lead for Orbiting Carbon Observatory -2/3, Jan 2022-Dec 2023
  • Visiting Associate, Aug 2018-,  Caltech
  • Research Scientist, Feb 2011-: Jet Propulsion Laboratory, Caltech
  • Assistant Researcher, Feb 2010-Feb 2011: University of California, Berkeley
  • Research associate, Feb 2008-Feb 2010: University of California, Berkeley
  • Research associate, Dec 2007-Feb 2008: University of Maryland-College Park

Community Service

  • Reviewer for Nature, Nature communications, Science Advance, Nature Plants, Scientific Report, Monthly Weather Review, Quarterly Journal of, Tellus, Climate Dynamics, Journal of Climate, Atmospheric Chemistry and Physics, and Geophysical Model Development
  • Reviewer for NASA, NOAA and NSF proposals

Research Interests

  • Carbon-climate interactions and predictions
  • Top-down atmosphere flux inversions
  • Human impact on carbon cycle

Selected Awards

  • JPL North Star Award for innovation (2025)
  • JPL Voyager Award (2022)
  • JPL Team Award (2022)
  • NASA Exceptional Achievement medal (2018)
  • JPL Ed Stone Award (2018)
  • JPL Voyager Award (2017)
  • NASA early career achievement award (2015)
  • NASA Group Achievement Award, Carbon Monitoring System Flux Pilot Project Team (2013)
  • Best Ph. D thesis award in Atmospheric and Oceanic Science department, University of Maryland, 2007

Selected Publications

  1. Liu, K., Liu, J., et al., Heterogeneous Responses of High-Latitude Forest Productivity to Interannual Climate Variability, Geophysical Research Letters, 2026, 10.1029/2025GL121078
  2. Byrne, B., Liu, J., Domke, G. M., Ogle, S. M., Ferreira, G. D., Bar-On, Y. M., et al. (2026). Significant influence of lateral Carbon fluxes on regional U.S. Carbon budgets. Global Biogeochemical Cycles, 40, e2025GB009020. https://doi.org/10.1029/2025GB009020
  3. Liu, J. (2026). The growing threat of extreme drought-heat to the Amazon carbon sink. AGU Advances, 7, e2026AV002309. https://doi.org/10.1029/2026AV002309
  4. Liu, J., Basu, S., Byrne, B., Yun, J., & O’Dell, C. (2026). The impact of OCO-2 seasonally dependent sampling on carbon flux estimation in the northern tropical Africa. Geophysical Research Letters, 53, e2025GL119838. https://doi.org/10.1029/2025GL119838
  5. Shi, M., Fang, Y., McDowell, N., Koven, C., Liu, J., Kuai, L., et al. (2026). Accelerated carbon and water cycles in the Amazon and Congo basins revealed from TRENDY models and remote sensing products. Global Biogeochemical Cycles, 40, e2025GB008747. https://doi.org/10.1029/2025GB008747
  6. Dong, Guanyu, Fei Jiang, Yongguang Zhang, et al. 2026. “Canadian Net Forest CO2 Uptake Enhanced by Heat Drought via Reduced Respiration.” Nature Geoscience, ahead of print, January 5. https://doi.org/10.1038/s41561-025-01875-1.
  7. Ciais, Philippe, Piyu Ke, Yitong Yao, et al. n.d. Low Latency Global Carbon Budget Indicates Reduced Land Carbon Sink in the Year 2024.
  8. Das, Chiranjit, Abhishek Chatterjee, Ravi Kumar Kunchala, and Junjie Liu. 2025. “Regional Fire Dynamics and Its Contributions to Carbon Flux Variability in South Asia.” Environmental Research Letters 20 (12): 124004. https://doi.org/10.1088/1748-9326/ae18e6.
  9. Parazoo, N., D. Carroll, J. B. Abshire, et al. 2025. “A U.S. Scientific Community Vision for Sustained Earth Observations of Greenhouse Gases to Support Local to Global Action.” AGU Advances 6 (6): e2025AV001914. https://doi.org/10.1029/2025AV001914.
  10. Singha Roy, Emili, Sajeev Philip, Matthew S. Johnson, et al. 2025. “Gross Primary Production Variations Dominate the Response of Indian Terrestrial Carbon Fluxes to Global Climatic Phenomena.” Communications Earth & Environment 6 (1): 1054. https://doi.org/10.1038/s43247-025-03013-6.
  11. Whelan, Mary, Nick Parazoo, and Paul O. Wennberg, et al. (including J. Liu), 2025. “A Blueprint for a Joint Meteorology and Atmospheric Composition Program”. W. M. Keck Institute of Space Studies (KISS), California Institute of Technology. https://doi.org/10.26206/sk7nw-4ej15.
  12. Worden, M. A., T. E. Bilir, A. A. Bloom, et al. 2025. “ Combining Observations and Models: A Review of the CARDAMOM Framework for Data-Constrained Terrestrial Ecosystem Modeling.” Global Change Biology 31, no. 8: e70462. https://doi.org/10.1111/gcb.70462.
  13. Bilir, T. E., Bloom, A. A., Konings, A. G., Liu, J., Parazoo, N. C., Quetin, G. R., et al. (2025). Satellite-constrained reanalysis reveals CO2 versus climate process compensation across the global land carbon sink. AGU Advances, 6, e2025AV001689. https://doi.org/10.1029/2025AV001689
  14. Pandey, S., Chevallier, F., Rödenbeck, C. et al. Reduction in Earth’s carbon budget imbalance. Nat Commun 16, 6818 (2025). https://doi.org/10.1038/s41467-025-61588-2
  15. Virkkala, AM., Rogers, B.M., Watts, J.D. et al. Wildfires offset the increasing but spatially heterogeneous Arctic–boreal CO2 uptake. Nat. Clim. Chang. (2025). https://doi.org/10.1038/s41558-024-02234-5
  16. Deng, Z., Ciais, P., Hu, L., Martinez, A., Saunois, M., Thompson, R. L., Tibrewal, K., Peters, W., Byrne, B., Grassi, G., Palmer, P. I., Luijkx, I. T., Liu, Z., Liu, J., Fang, X., Wang, T., Tian, H., Tanaka, K., Bastos, A., Sitch, S., Poulter, B., Albergel, C., Tsuruta, A., Maksyutov, S., Janardanan, R., Niwa, Y., Zheng, B., Thanwerdas, J., Belikov, D., Segers, A., and Chevallier, F.: Global greenhouse gas reconciliation 2022, Earth Syst. Sci. Data, 17, 1121–1152, https://doi.org/10.5194/essd-17-1121-2025, 2025.
  17. Friedlingstein, P. et al (including J. Liu). Global Carbon Budget 2024, Earth Syst. Sci. Data, 17, 965–1039, https://doi.org/10.5194/essd-17-965-2025, 2025.
  18. Kennedy, R. E., Serbin, S., Dietze, M., Andersen, H., Babcock, C., Baker, D. F., Brown, M. E., Davis, K. J., Duncanson, L., Feng, S., Hudak, A. T., Liu, J., Patterson, P. L., Raczka, B., Cochrane, M. A., Sepulveda Carlo, E., Vargas, R. 2024. Characterizing and communicating uncertainty: lessons from NASA's Carbon Monitoring System. Environmental Research Letters. DOI: 10.1088/1748-9326/ad8be0
  19. Hugelius, G., Ramage, J., Burke, E., Chatterjee, A., Smallman, T. L., Aalto, T., et al. (2024). Permafrost region greenhouse gas budgets suggest a weak CO2 sink and CH4 and N2O sources, but magnitudes differ between top-down and bottom-up methods. Global Biogeochemical Cycles, 38, e2023GB007969. https://doi.org/10.1029/2023GB007969
  20. Byrne, B., Liu, J., Bowman, K.W. et al. Carbon emissions from the 2023 Canadian wildfires. Nature (2024). https://doi.org/10.1038/s41586-024-07878-z
  21. Ruixue Lei, Jeralyn Poe, Deborah Huntzinger, Junjie Liu, Stephen Stich, David F. Baker, Leyang Feng, Dylan C. Gaeta, Ziting Huang, Scot M. Miller, The Orbiting Carbon Observatory-2 (OCO-2) and in situ CO2 data suggest a larger seasonal amplitude of the terrestrial carbon cycle compared to many dynamic global vegetation models, Remote Sensing of Environment, Volume 312, 2024, 114326, ISSN 0034-4257, https://doi.org/10.1016/j.rse.2024.114326.
  22. Liu, J., Bowman, K., Palmer, P. I., Joiner, J., Levine, P., Bloom, A. A., et al. (2024). Enhanced carbon flux response to atmospheric aridity and water storage deficit during the 2015–2016 El Niño compromised carbon balance recovery in tropical South America. AGU Advances, 5, e2024AV001187. https://doi.org/10.1029/2024AV001187
  23. Stanley, M., Kuusela, M., Byrne, B., and Liu, J.: Technical note: Posterior uncertainty estimation via a Monte Carlo procedure specialized for 4D-Var data assimilation, Atmos. Chem. Phys., 24, 9419–9433, https://doi.org/10.5194/acp-24-9419-2024, 2024.
  24. Pandey, S., Miller, J. B., Basu, S., Liu, J., Weir, B., Byrne, B., et al. (2024). Toward low-latency estimation of atmospheric CO2 growth rates using satellite observations: Evaluating sampling errors of satellite and in situ observing approaches. AGU Advances, 5, e2023AV001145. https://doi.org/10.1029/2023AV001145
  25. Liu, J, et al., The reduced net carbon uptake over Northern Hemisphere land causes the close-to-normal CO2 growth rate in 2021 La Niña. Sci. Adv.10,eadl2201(2024).DOI:10.1126/sciadv.ad
  26. Byrne, B., Liu, J., Bowman, K. W., Yin, Y., Yun, J., Ferreira, G. D., et al. (2024). Regional inversion shows promise in capturing extreme-event-driven CO2 flux anomalies but is limited by atmospheric CO2observational coverage. Journal of Geophysical Research: Atmospheres, 129, e2023JD040006. https://doi.org/10.1029/2023JD040006
  27. Hobbs, J., Katzfuss, M., Nguyen, H., Yadav, V., and Liu, J.: Functional analysis of variance (ANOVA) for carbon flux estimates from remote sensing data, Geosci. Model Dev., 17, 1133–1151, https://doi.org/10.5194/gmd-17-1133-2024, 2024.
  28. Liu, J., Wennberg, P.O. An emergent constraint on the thermal sensitivity of photosynthesis and greenness in the high latitude northern forests. Sci Rep 14, 6189 (2024). https://doi.org/10.1038/s41598-024-56362-1
  29. Chen, et al, (including J. Liu) 2024 Environ. Res. Lett. in press, DOI 10.1088/1748-9326/ad3cf7, https://doi.org/10.1088/1748-9326/ad3cf7
  30. Wang, Y., Liu, J., Wennberg, P. O., He, L., Bonal, D., Köhler, P., Frankenberg, C., Sitch, S., & Friedlingstein, P.(2023). Elucidating climatic drivers of photosynthesis by tropical forests. Global Change Biology, 29, 4811–4825. https://doi.org/10.1111/gcb.16837
  31. Friedlingstein, P., (including J. Liu).: Global Carbon Budget 2023, Earth Syst. Sci. Data, 15, 5301–5369, https://doi.org/10.5194/essd-15-5301-2023, 2023.
  32. Levine, P. A., Bloom, A. A., Bowman, K. W., Reager, J. T., Worden, J. R., Liu, J., et al. (2023). Water stress dominates 21st-century tropical land carbon uptake. Global Biogeochemical Cycles, 37, e2023GB007702. https://doi.org/10.1029/2023GB007702
  33. Gaubert, B., Stephens, B. B., Baker, D. F., Basu, S., Bertolacci, M., Bowman, K. W., et al. (2023). Neutral tropical African CO2 exchange estimated from aircraft and satellite observations. Global Biogeochemical Cycles, 37, e2023GB007804. https://doi.org/10.1029/2023GB007804
  34. Wu, D., et al.: A simplified non-linear chemistry transport model for analyzing NO2 column observations: STILT–NOx, Geosci. Model Dev., 16, 6161–6185, https://doi.org/10.5194/gmd-16-6161-2023, 2023.
  35. Wang, J., Zeng, N., Wang, M., Jiang, F., Chevallier, F., Crowell, S., et al. (2023). Anomalous net biome exchange over Amazonian rainforests induced by the 2015/16 El Niño: Soil dryness-shaped spatial pattern but temperature-dominated total flux. Geophysical Research Letters, 50, e2023GL103379. https://doi.org/10.1029/2023GL103379
  36. Taylor, T. E., O'Dell, C. W., (including Liu, J.) et al., Evaluating the consistency between OCO-2 and OCO-3 XCO2 estimates derived from the NASA ACOS version 10 retrieval algorithm, Atmos. Meas. Tech. Discuss. [preprint], https://doi.org/10.5194/amt-2022-329, in review, 2023.
  37. Quetin, G. R., Famiglietti, C. A., Dadap, N. C., Bloom, A. A., Bowman, K. W., Diffenbaugh, N. S., Liu, J., et al. (2023). Attributing past carbon fluxes to CO2 and climate change: Respiration response to CO2fertilization shifts regional distribution of the carbon sink. Global Biogeochemical Cycles, 37, e2022GB007478. https://doi.org/10.1029/2022GB007478
  38. Byrne, B., Baker, D. F., Basu, S., Bertolacci, M., Bowman, K. W., Carroll, D., Chatterjee, A., Chevallier, F., Ciais, P., Cressie, N., Crisp, D., Crowell, S., Deng, F., Deng, Z., Deutscher, N. M., Dubey, M. K., Feng, S., García, O. E., Griffith, D. W. T., Herkommer, B., Hu, L., Jacobson, A. R., Janardanan, R., Jeong, S., Johnson, M. S., Jones, D. B. A., Kivi, R., Liu, J., Liu, Z., Maksyutov, S., Miller, J. B., Miller, S. M., Morino, I., Notholt, J., Oda, T., O'Dell, C. W., Oh, Y.-S., Ohyama, H., Patra, P. K., Peiro, H., Petri, C., Philip, S., Pollard, D. F., Poulter, B., Remaud, M., Schuh, A., Sha, M. K., Shiomi, K., Strong, K., Sweeney, C., Té, Y., Tian, H., Velazco, V. A., Vrekoussis, M., Warneke, T., Worden, J. R., Wunch, D., Yao, Y., Yun, J., Zammit-Mangion, A., and Zeng, N.: National CO2 budgets (2015–2020) inferred from atmospheric CO2 observations in support of the global stocktake, Earth Syst. Sci. Data, 15, 963–1004, https://doi.org/10.5194/essd-15-963-2023, 2023.
  39. He, Wei, Fei Jiang, Mousong Wu, Weimin Ju, Marko Scholze, Zhi Chen, Brendan Byrne, Liu, J., et al. n.d. “China’s Terrestrial Carbon Sink over 2010–2015 Constrained by Satellite Observations of Atmospheric CO2 and Land Surface Variables.” Journal of Geophysical Research: Biogeosciences n/a (n/a): e2021JG006644. https://doi.org/https://doi.org/10.1029/2021JG006644.
  40. Wu, D., Liu, J., Wennberg, P. O., Palmer, P. I., Nelson, R. R., Kiel, M., and Eldering, A.: Towards sector-based attribution using intra-city variations in satellite-based emission ratios between CO2 and CO, Atmos. Chem. Phys., 22, 14547–14570, https://doi.org/10.5194/acp-22-14547-2022, 2022.
  41. He, L., Wei, J., Wang, Y., Shang, Q., Liu, J., Yin, Y., et al. (2022). Marked impacts of pollution mitigation on crop yields in China. Earth's Future, 10, e2022EF002936. https://doi.org/10.1029/2022EF002936
  42. Friedlingstein, P., et al. (including J. Liu)Global Carbon Budget 2022, Earth Syst. Sci. Data, 14, 4811–4900, https://doi.org/10.5194/essd-14-4811-2022, 2022.
  43. Byrne, B., Liu, J., Yi, Y., Chatterjee, A., Basu, S., Cheng, R., Doughty, R., Chevallier, F., Bowman, K. W., Parazoo, N. C., Crisp, D., Li, X., Xiao, J., Sitch, S., Guenet, B., Deng, F., Johnson, M. S., Philip, S., McGuire, P. C., and Miller, C. E.: Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia, Biogeosciences, 19, 4779–4799, https://doi.org/10.5194/bg-19-4779-2022, 2022.
  44. Zhang, Li, Kenneth J Davis, Andrew E Schuh, Andrew R Jacobson, Sandip Pal, Yu Yan Cui, David Baker, (including Liu, J.) et al. 2022. “Multi-Season Evaluation of CO2 Weather in OCO-2 MIP Models.” Journal of Geophysical Research: Atmospheres 127 (2): e2021JD035457. https://doi.org/https://doi.org/10.1029/2021JD035457.
  45. He, Liyin, Brendan Byrne, Yi Yin, Junjie Liu, and Christian Frankenberg. 2022. “Remote-Sensing Derived Trends in Gross Primary Production Explain Increases in the CO2 Seasonal Cycle Amplitude.” Global Biogeochemical Cycles 36 (9): e2021GB007220. https://doi.org/https://doi.org/10.1029/2021GB007220.
  46. Friedlingstein, P., et al. (including J. Liu).: Global Carbon Budget 2021, Earth Syst. Sci. Data, 14, 1917–2005, https://doi.org/10.5194/essd-14-1917-2022, 2022.
  47. Cui, Yu Yan, Li Zhang, Andrew R Jacobson, Matthew S Johnson, Sajeev Philip, David Baker, Frederic Chevallier, et al. 2022. “Evaluating Global Atmospheric Inversions of Terrestrial Net Ecosystem Exchange CO2 over North America on Seasonal and Sub-Continental Scales.” Geophysical Research Letters n/a (n/a): e2022GL100147. https://doi.org/https://doi.org/10.1029/2022GL100147.
  48. Laughner, Joshua L, Jessica L Neu, David Schimel, Paul O Wennberg, Kelley Barsanti, Kevin W Bowman, Abhishek Chatterjee, et al. 2021. “Societal Shifts Due to COVID-19 Reveal Large-Scale Complexities and Feedbacks between Atmospheric Chemistry and Climate Change.” Proceedings of the National Academy of Sciences 118 (46). https://doi.org/10.1073/pnas.2109481118.
  49. Barkhordarian, Armineh, Kevin W Bowman, Noel Cressie, Jeffrey Jewell, and Junjie Liu. 2021. “Emergent Constraints on Tropical Atmospheric Aridity{\textendash}carbon Feedbacks and the Future of Carbon Sequestration,” October. https://doi.org/10.1088/1748-9326/ac2ce8.
  50. Byrne, B, J Liu, M Lee, Y Yin, K W Bowman, K Miyazaki, A J Norton, et al. 2021. “The Carbon Cycle of Southeast Australia During 2019–2020: Drought, Fires, and Subsequent Recovery.” AGU Advances 2 (4): e2021AV000469. https://doi.org/https://doi.org/10.1029/2021AV000469.
  51. Parazoo, Nicholas C, Kevin W Bowman, Bianca C Baier, Junjie Liu, Meemong Lee, Le Kuai, Yoichi Shiga, et al. 2021. “Covariation of Airborne Biogenic Tracers (CO2, COS, and CO) Supports Stronger Than Expected Growing Season Photosynthetic Uptake in the Southeastern US.” Global Biogeochemical Cycles 35 (10): e2021GB006956. https://doi.org/https://doi.org/10.1029/2021GB006956.
  52. Park, Chaerin, Sujong Jeong, Hoonyoung Park, Jeongmin Yun, and Junjie Liu. 2021. “Evaluation of the Potential Use of Satellite-Derived XCO2 in Detecting CO2 Enhancement in Megacities with Limited Ground Observations: A Case Study in Seoul Using Orbiting Carbon Observatory-2.” Asia-Pacific Journal of Atmospheric Sciences 57 (2): 289–99. https://doi.org/10.1007/s13143-020-00202-5.
  53. Peiro, H, S Crowell, A Schuh, D F Baker, C O’Dell, A R Jacobson, F Chevallier, et al. 2021. “Four Years of Global Carbon Cycle Observed from OCO-2 Version 9 and \textit{in Situ} Data, and Comparison to OCO-2 V7.” Atmospheric Chemistry and Physics Discussions 2021: 1–50. https://doi.org/10.5194/acp-2021-373.
  54. Liao, E., Resplandy, L., Liu, J., & Bowman, K. W. (2021). Future weakening of the ENSO ocean carbon buffer under anthropogenic forcing. Geophysical Research Letters, 48, e2021GL094021. https://doi.org/10.1029/2021GL094021
  55. Chen, Z., Huntzinger, D. N., Liu, J., ...., and Miller, S. M.: Five years of variability in the global carbon cycle: comparing an estimate from the Orbiting Carbon Observatory-2 and process-based models, Environ. Res. Lett. 16 054041
  56. Worden, J., Saatchi, S., Keller, M., Bloom, A., Liu, J., Parazoo, N., et al. (2021). Satellite observations of the tropical terrestrial carbon balance and interactions with the water cycle during the 21st century. Reviews of Geophysics, 59, e2020RG000711. https://doi.org/10.1029/2020RG000711
  57. Chen, Z., Liu, J., Henze, D. K., Huntzinger, D. N., Wells, K. C., and Miller, S. M.: Linking global terrestrial CO2 fluxes and environmental drivers using OCO-2 and a geostatistical inverse model, Atmos. Chem. Phys., 21, 6663–6680, https://doi.org/10.5194/acp-21-6663-2021, 2021.
  58. Worden, S., Fu, R., Chakraborty, S., Liu, J., & Worden, J. (2021). Where does moisture come from over the Congo Basin? Journal of Geophysical Research: Biogeosciences, 126, e2020JG006024. https://doi.org/10.1029/2020JG006024
  59. Liu, J., Baskaran, L., Bowman, K., Schimel, D., Bloom, A. A., Parazoo, N. C., Oda, T., Carroll, D., Menemenlis, D., Joiner, J., Commane, R., Daube, B., Gatti, L. V., McKain, K., Miller, J., Stephens, B. B., Sweeney, C., and Wofsy, S.: Carbon Monitoring System Flux Net Biosphere Exchange 2020 (CMS-Flux NBE 2020), Earth Syst. Sci. Data, 13, 299–330, https://doi.org/10.5194/essd-13-299-2021, 2021.
  60. Liu, J., Wennberg, P. O., Parazoo, N. C., Yin, Y., & Frankenberg, C. (2020). Observational constraints on the response of high‐latitude northern forests to warming. AGU Advances, 1, e2020AV000228. https://doi.org/10.1029/2020AV000228
  61. Carroll, D., Menemenlis, D., et al. (including J. Liu), (2020). The ECCO‐Darwin data‐assimilative global ocean biogeochemistry model: Estimates of seasonal to multidecadal surface ocean pCO2 and air‐sea CO2 flux. Journal of Advances in Modeling Earth Systems, 12, e2019MS001888. https://doi.org/10.1029/2019MS001888
  62. Liao, E., Resplandy, L., Liu, J., & Bowman, K. W. (2020). Amplification of the ocean carbon sink during El Niños: Role of poleward Ekman transport and influence on atmospheric CO2. Global Biogeochemical Cycles, 34, e2020GB006574. https://doi.org/10.1029/2020GB006574
  63. Yin, Y. et al. (including J. Liu), 2020, Fire decline in dry tropical ecosystems enhances decadal land carbon sink. Nat Commun 11, 1900 (2020). https://doi.org/10.1038/s41467-020-15852-2
  64. Yi, Y., Kimball, J. S., Watts, J. D., Natali, S. M., Zona, D., Liu, J., Ueyama, M., Kobayashi, H., Oechel, W., and Miller, C. E.: Investigating the sensitivity of soil heterotrophic respiration to recent snow cover changes in Alaska using a satellite-based permafrost carbon model, Biogeosciences, 17, 5861–5882, https://doi.org/10.5194/bg-17-5861-2020, 2020.
  65. Byrne, B.*, Liu, J., Bloom, A. A., Bowman, K. W., Butterfield, Z., Joiner, J., et al. (2020). Contrasting regional carbon cycle responses to seasonal climate anomalies across the east‐west divide of temperate North America. Global Biogeochemical Cycles, 34, e2020GB006598. https://doi.org/10.1029/2020GB006598
  66. Byrne, B. *, Liu, J., Lee, M., Baker, I., Bowman, K. W., Deutscher, N. M., et al. (2020). Improved constraints on northern extratropical CO2 fluxes obtained by combining surface‐based and space‐based atmospheric CO2 measurements. Journal of Geophysical Research: Atmospheres, 125, e2019JD032029. https://doi.org/10.1029/2019JD032029
  67. Butler, M. P., Lauvaux, T., Feng, S., Liu, J., Bowman, K. W., & Davis, K. J. (2020). Atmospheric simulations of total column CO2 mole fractions from global to mesoscale within the carbon monitoring system flux inversion framework. Atmosphere, 11(8), 787.
  68. Bloom, A. A., Bowman, K. W., Liu, J., Konings, A. G., Worden, J. R., Parazoo, N. C., Meyer, V., Reager, J. T., Worden, H. M., Jiang, Z., Quetin, G. R., Smallman, T. L., Exbrayat, J.-F., Yin, Y., Saatchi, S. S., Williams, M., and Schimel, D. S.: Lagged effects regulate the inter-annual variability of the tropical carbon balance, Biogeosciences, 17, 6393–6422, https://doi.org/10.5194/bg-17-6393-2020, 2020.
  69. Jones, S., Rowland, L., Cox, P., Hemming, D., Wiltshire, A., Williams, K., Parazoo, N. C., Liu, J., da Costa, A. C. L., Meir, P., Mencuccini, M., and Harper, A. B.: The impact of a simple representation of non-structural carbohydrates on the simulated response of tropical forests to drought, Biogeosciences, 17, 3589–3612, https://doi.org/10.5194/bg-17-3589-2020, 2020.
  70. Yun et al., (including Liu, J), Enhanced regional terrestrial carbon uptake over Korea revealed by atmospheric CO 2 measurements from 1999 to 2017, Global Change, Biology, 2020, DOI: 10.1111/gcb.15.061
  71. Yin, Y., Byrne, B., Liu, J., Wennberg, P., Davis, K. J., Magney, T., et al. ( 2020). Cropland carbon uptake delayed and reduced by 2019 Midwest floods. AGU Advances, 1, e2019AV000140. https://doi.org/10.1029/2019AV000140
  72. Feng, S., T. Lauvaux, K. Davis, K. Keller, Y. Zhou, C. Williams, A. Schuh, J. Liu, I. Baker, 2019: Seasonal characteristics of model uncertainties from biogenic fluxes, transport, and large-scale boundary inflow in atmospheric CO2 simulations over North America. J. Geophys. Res.-Atmos., https://doi.org/10.1029/2019JD031165
  73. Shi, M., Liu, J., Worden, J. R., Bloom, A. A., Wong, S., & Fu, R. ( 2019). The 2005 Amazon drought legacy effect delayed the 2006 wet season onset. Geophysical Research Letters, 46, 9082– 9090. https://doi.org/10.1029/2019GL083776
  74. Crowell, S., Baker, D., Schuh, A., Basu, S., Jacobson, A. R., Chevallier, F., Liu, J., Deng, F., Feng, L., McKain, K., Chatterjee, A., Miller, J. B., Stephens, B. B., Eldering, A., Crisp, D., Schimel, D., Nassar, R., O'Dell, C. W., Oda, T., Sweeney, C., Palmer, P. I., and Jones, D. B. A.: The 2015–2016 carbon cycle as seen from OCO-2 and the global in situ network, Atmos. Chem. Phys., 19, 9797–9831, https://doi.org/10.5194/acp-19-9797-2019, 2019.
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Projects

OCO-2 - Orbiting Carbon Observatory
CMS Flux (Carbon Monitoring System Flux)
NASA Carbon Cycle Science (CARBON)