Terrestrial ecosystems can interact with our planet's climate through breathing in and out of CO2 by photosynthesis and respiration. My primary research interests are to quantify these exchanges and understand their sensitivity to climate. My PhD and Postdoc focused on using aircraft and satellite observations with carbon models to quantify CO2 exchanges between land and atmosphere, and track CO2 movement in the atmosphere through clouds and stormtracks. In my current research I focus on changing CO2 uptake in climate sensitive regions in the Arctic and tropics where carbon-climate feedbacks are large, observations are sparse, and process understanding is limited..

• Ph.D., Atmospheric Science, Colorado State University, Fort Collins, Colorado (2011)
• M.S., Atmospheric Science, Colorado State University, Fort Collins, Colorado (2007)
• B.S., Environmental Science, Oregon State University, Corvallis, Oregon (2004)

• Terrestrial carbon cycling
• Carbon-climate feedbacks
• Atmospheric Transport

• Research Scientist at JPL (2016-present)
• Assistant Researcher, JIFRESSE (2014-2016)
• Postdoctoral Research Associate, JIFRESSE (2011-2014)
• Graduate Research Assistant, Colorado State University (2004-2011)

Accepted

1. Parazoo, N. C., A. Arneth, T. Pugh et al., Spring photosynthetic onset and net CO2 uptake in northern terrestrial ecosystems triggered by landscape thawing, Global Change Biology, Accepted.
2. Graven, H., et al. and N. C. Parazoo, Assessing fossil fuel CO2 emissions in California using atmospheric CO2 observations and models, Env. Res. Lett., Accepted.
3. Jeong, S.-J., A. Anthony Bloom, D. Schimel, C. Sweeney, N. C. Parazoo, D. Medvigy, G. Schaepman, and C. E. Miller, Accelerating rates of Arctic carbon cycling revealed by long-term atmospheric CO2 measurements, Science, Accepted.

Published

4. Parazoo, N. C., C. D. Koven, D. M. Lawrence, V. Romanovsky, C.E. Miller, Detecting the permafrost carbon feedback: Talik formation and increased cold-season respiration as precursors to sink-to-source transitions, 2018: The Cryosphere, 12, 123-144, https://doi.org/10.5194/tc-12-123-2018.
5. Liu, J., K. W. Bowman, D. Schimel, N. C. Parazoo, Z. Hiang, M. Lee, A. A. Bloom, D. Wunch, C. Frankenberg, Y. Sun, C. O'Dell, K. R. Gurney, D. Menemenlis, M. Girerach, D. Crisp, and Annmarie Eldering, Contrasting carbon cycle responses of the tropical continents to the 2015 El Nino, 2017: Science, 358 (6360), eaam5690, doi:10.1126/science.aam5690.
6. Bowman, K., J. Liu, A. Bloom, N. C. Parazoo, M. Lee, Z. Jiang, D. Menemenlis, M. Gierach, G. Collatz, K. Gurney, Global and Brazilian carbon response to El Nino Modoki 2011-2010, Earth and Space Science, 2017: 4, 637-660. https://doi.org/10.1002/2016EA000204.
7. Huntzinger, D. N., A. M. Michalak, C. Schwalm, P. Ciais, K. Schaefer, A. W. King, Y. Fang, K. Schaefer, Y. Wei, R. B. Cook, A. Jacobson, J. Fisher, D. Hayes, M. Huang, A. Ito, A. K. Jain, H. Lei, C. Lu, F. Maignan, J. Mao, N. C. Parazoo, S. Peng, B. Poulter, D. Riccuito, X. Shi, H. Tian, W. Wang, N. Zeng, F. Zhao, 2017: Understanding the global land carbon sink: Beyond climate and CO2 sensitivity, Scientific Reports, 7, 4764, doi:10.1038/s41598-017-03818-2.
8. Madani, N., J. Kimball, L. Jones, N. C. Parazoo, K. Guan, 2017: Global Analysis of Bioclimatic Controls on Ecosystem Productivity using Satellite Observations of Solar-Induced Chlorophyll Fluorescence, Remote Sensing, 9, 530, doi:10.3390/rs9060430.
9. Chew, C., S. Lowe, N. Parazoo, S. Esterhuizen, S. Oveisgharan, E. Podest, C. Zuffada, A. Freedman, 2017: SMAP radar receiver measures land surface freeze/thaw state through capture of forward-scattered L-band signals, Remote Sensing Of Environment, 198, 333-344.
10. Fang, Y., A. Michalak, C. Schwalm, D. Huntzinger, J. Berry, P. Ciais, S. Piao, B. Poulter, J. Fisher, R. Cook, D. Hayas, M. Huang, A. Ito, A Jain, H. Lei, C. Lu, J. Mao, N. Parazoo, S. Peng, D. Ricciuto, X. Shi, B. Tao, H. Tian, W. Wang, Y. Wei, J. Yang, 2017: Global land carbon sink response to temperature and precipitation varies with ENSO phase, Environ. Res. Lett., 12, 6.
11. Fischer, M. L., N. C. Parazoo,, K. Brophy, X. Cui, S. Jeong, J. Liu, R. Keeling, T. E. Taylor, K. Gurney, T. Oda, H. Graven (2017) Simulated Estimation of California Fossil Fuel and Biosphere Carbon Dioxide Exchanges Combining In-situ Tower and Satellite Column Observations, J. Geophys. Res - Atm, 122 (6), 3653-3671.
12. Commane, R., et al. inc. N. C. Parazoo (2017) Rising carbon dioxide emissions from Arctic tundra driven by early winter respiration, Proc Natl Acad Sci, doi:10.1073/pnas.1618567114.
13. Luus, K., R. Commane, N. C. Parazoo et al. (2017) Tundra photosynthesis captured by satellite-observed solar-induced chlorophyll fluorescence, Geophys. Res. Lett., DOI:10.1002/2016/GL070842.
14. Barnes, E. A., N. C. Parazoo, C. Orbe, S. Denning (2016) Isentropic transport and the seasonal cycle amplitude of CO2, J. Geophys. Res. Atmos., 121, doi:10.1002/2016JD025109.
15. Parazoo, N. C., et al. (2016) Detecting Regional Patterns of Changing CO2 Flux in Alaska, Proc Natl Acad Sci, 113, 28, 7733-7738.
16. Ito, A., et al. inc. N. C. Parazoo (2016) Decadal trends in seasonal-cycle amplitude of terrestrial CO2 exchange resulting from the ensemble of terrestrial biosphere models, Tellus B, 68, 28968, doi:10.3402/tellusb.v68.28968.
17. Shao, J. et al. inc., N. C. Parazoo (2016) Uncertainty analysis of terrestrial net primary productivity and net biome productivity in China during 1901-2005, J. Geophysical Research – Biogeosciences, 10.1002/2015JG003062.
18. Deng, F., D. B. A. Jones, C. O’Dell, R. Nassar, N. C. Parazoo (2016) Combining GOSAT XCO2 observations over land and ocean to improve regional CO2 flux estimates, Journal of Geophysical Research – Atmospheres, doi:10.1002/2015JD024157.
19. J. Mao, et al. inc. N. C. Parazoo (2015) Disentangling climatic and anthropogenic controls on global terrestrial evapotranspiration trends, Environ. Res. Lett., 10, 094008.
20. Parazoo, N. C. (2015) Influence of ENSO and the NAO on Terrestrial Carbon Uptake in the Texas-northern Mexico Region, Global Biogeochemical Cycles, 29, doi:10.1002/2015GB005125.
21. Anav, A., et al. inc. N. C. Parazoo (2015) Spatio-temporal patterns of terrestrial gross primary production: A review, Review of Geophysics, 53, doi:10.1002/2015RG000483.
22. Parazoo, N. C., K. Bowman, J. B. Fisher, C. Frankenberg, D. B. Jones, A. Cescatti, O. Perez-Priego, G. Wohlfahrt, L. Montagnani (2014) Terrestrial gross primary production inferred from satellite fluorescence and vegetation models, Global Change Biology, 20 (10), 3103-3121. 
23. Wunch, D., P. O. Wennberg, J. Messerschmidt, N. Parazoo, G. C. Toon, N. M. Deutscher, G. Keppel-Aleks, C. M. Roehl, J. T. Randerson, T. Warneke, J. Notholt (2013) The Covariation of Northern Hemisphere Summertime CO2 with Surface Temperature at Boreal Latitudes, Atmos. Chem. Phys., 13, 9447-9459.
24. Parazoo, N. C., K. Bowman, C. Frankenberg, J.-E. Lee, J. B. Fisher, J. Worden, D. Jones, et al. (2013) Interpreting seasonal changes in the carbon balance of southern Amazonia using measurements of XCO2 and chlorophyll fluorescence from GOSAT, Geophys. Res. Lett., 40, doi:10.1002/grl.50452.
25. Messerschmidt, J., N. Parazoo, N. M. Deutscher, C. Roehl, T. Warneke, P. O. Wennberg, and D. Wunch (2013) Evaluation of seasonal atmosphere-biosphere exchange estimations with TCCON measurements, Atmos. Chem. Phys., 13, 5103-5115, doi:10.5194/acp-13-5103-2013.
26. Parazoo, N. C., A. S. Denning, S. R. Kawa, S. Pawson, and R. Lokupitiya (2012) CO₂ flux estimation errors associated with moist atmospheric processes, Atmos. Chem. Phys., 12, 6405-6416.
27. Parazoo, N. C., A. S. Denning, J. Berry, D. Randall, S. Kawa, O. Pauluis, and S. C. Doney (2011) Moist synoptic transport of CO2 along the mid-latitude storm track, Geophys. Res. Lett., 38, L09804, doi:10.1029/2011GL047238.
28. Schuh, A. E., A. S. Denning, K. D. Corbin, I. T. Baker, M. Uliasz, N. Parazoo, A. E. Andrews, D.E.J. Worthy (2010) A regional high-resolution carbon flux inversion of North America for 2004, Biogeosciences, 7, 1625-1644.
29. Corbin, K. D., A. S. Denning, and N. C. Parazoo (2009) Assessing temporal clear-sky errors in assimilation of satellite CO2 retrievals using a global transport model, Atmos. Chem. Phys., 9, 3043-3048.
30. Parazoo, N. C., A. S. Denning, R. Kawa, K. Corbin, R. Lokupitia, I. Baker, and D. Worthy (2008) Mechanisms for synoptic transport of CO2 in the midlatitudes and tropics, Atmos. Chem. Phys., 8, 7239-7254.