Hajoon Song

Research interests

• Air-sea interactions
• Carbon cycle
• Data assimilation

Education

• Ph.D. (2011) Scripps Institution of Oceanography, University of California, San Diego, USA
• B.S. (2005) Department of Atmospheric Sciences, Yonsei University, Seoul, Korea

Research Experience

• MIT, Cambridge, USA (2013-2018)
• University of California, Santa Cruz, USA (2011-2013)
• Scripps Institution of Oceanography, La Jolla, USA (2005-2011)

Courses

• Atmospheric and Oceanic Circulation
• Ocean modeling
• Atmosphere-Ocean interaction
• Physical Oceanography

Selected Publications

• Doddridge, E. W. , J. Marshall, H. Song, J-M Campin and M. Kelley (2021). Southern Ocean heat storage, reemergence, and winter sea ice decline induced by summertime winds. Journal of Climate 34 (4), 1403-1415
• Gupta, M., J. Marshall, H. Song, J-M Campin and G. Meneghello (2020). Sea‐Ice Melt Driven by Ice‐Ocean Stresses on the Mesoscale, Journal of Geophysical Research: Oceans 125 (11), e2020JC016404
• Wang, S., Kranz, S. A., Kelly, T. B., Song, H., Stukel, M. R., and Cassar, N. (2020). Lagrangian studies of net community production: The effect of diel and multiday nonsteady state factors and vertical fluxes on O2/Ar in a dynamic upwelling region. Journal of Geophysical Research: Biogeosciences, 125, e2019JG005569. https://doi.org/10.1029/2019JG005569
• Stukel, M. R., L. I. Aluwihare, K. A. Barbeau, A. M. Chekalyuk, R. Goericke, A. J. Miller, M. D. Ohman, A. Ruacho, H. Song, B. Stephens, M. R. Landry, 2017: Mesoscale ocean fronts enhance carbon export due to gravitational sinking and subduction. PNAS, 114, 1252-1257.
• Mattern, J. P., H. Song, C. A. Edwards, A. M. Moore and J. Fiechter, 2017: Data assimilation of physical and chlorophyll observations in the California Current System using two biogeochemical models. Ocean Model., 109, 55-71.
• Song, H., J. Marshall, D. R. Munro, S. Dutkiewicz, C. Sweeney, D. J. McGillicuddy Jr. and U. Hausmann, 2016: Mesoscale modulation of air-sea CO2 flux in Drake Passage. J. Geophys. Res., 121, 6635-6649.
• Song, H., C. A. Edwards, A. M. Moore and J. Fietcher, 2016: Data assimilation in a coupled physical-biogeochemical model of the California Current System using an incremental lognormal 4-dimensional variational approach: Part 1, Model formulation and biological data assimilation twin experiments. Ocean Model., 106, 131-145.
• Song, H., C. A. Edwards, A. M. Moore and J. Fietcher: Data assimilation in a coupled physical-biogeochemical model of the California Current System using an incremental lognormal 4-dimensional variational approach: Part 2, Joint physical and biological data assimilation twin experiments. Ocean Model., 106, 146-158.
• Song, H., C. A. Edwards, A. M. Moore and J. Fietcher, 2016: Data assimilation in a coupled physical-biogeochemical model of the California Current System using an incremental lognormal 4-dimensional variational approach: Part 3, Assimilation in a realistic context using satellite and in situ observations. Ocean Model., 106, 159-172.
• Song, H., J. Marshall, M. J. Follows, S. Dutkiewicz and G. Forget, 2016: Source waters for the highly productive Patagonian shelf in the southwestern Atlantic. J. Mar. Syst., 158, 120-128.
• Song, H., J. Marshall, P. Gaube and D.J. McGillicuddy, 2015: Anomalous chlorofluorocarbon uptake by mesoscale eddies in the Drake Passage region. J. Geophys. Res. Oceans, 120, 1065-1078.
• Edwards, C. A., A. M. Moore, J. P. Mattern, J. Fiechter, H. Song, and M. G. Jacox, 2015: Hindcasting and nowcasting the physical and biological state of the California Current System. CalCOFI Rep., 56, 11-12.
• Miller, A. J., H. Song and A. C. Subramanian, 2015: The physical oceanographic environment during the CCE-LTER Years: Changes in climate and concepts. Deep-Sea Res. Pt II, 112, 6-17.
• Song, H., I. Hoteit, B. D. Cornuelle X. Luo and A. C. Subramanian, 2013: An Adjoint-Based Adaptive Ensemble Kalman Filter. Mon. Wea. Rev., 141, 3343-3359.
• Song, H., C. A. Edwards, A. M. Moore and J. Fietcher, 2012: Four-dimensional variational data assimilation of positive-definite oceanic variables using a logarithm transformation. Ocean Model., 54-55, 1-17.
• Song, H., A. J. Miller, S. McClatchie, E. D. Weber, K. M. Nieto and D. M. Checkley Jr., 2012: Application of a data-assimilation model to variability of Pacific sardine spawning and survivor habitats with ENSO in the California Current System. J. Geophys. Res., 117, C03009.
• Subramanian, A. C., I. Hoteit, B. D. Cornuelle and H. Song, 2012: Linear vs Nonlinear Filtering with scale selective corrections for balanced dynamics in a simple atmospheric model. J. Atmos. Sci., 69, 3405-3419.
• Song, H., A. J. Miller, B. D. Cornuelle and E. Di Lorenzo, 2011: Changes in upwelling and its water sources in the California Current System driven by different wind forcing. Dynam. Atmos. Oceans., 52, 170-191.
• Song, H., I. Hoteit, B. D. Cornuelle and A. C. Subramanian, 2010: An adaptive approach to mitigate background covariance limitations in the ensemble Kalman filter. Mon. Wea. Rev., 138, 2825-2845.