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Staff information


Samson Hagos

Earth Systems Analysis & Modeling
Pacific Northwest National Laboratory
PO Box 999
MSIN: K9-30
Richland, WA 99352

Education and Credentials

  • PhD Atmospheric Sciences Cornell University Ithaca NY
  • MS Atmospheric Sciences Cornell University Ithaca NY
  • BS Physics University of Asmara Asmara Eritrea

PNNL Publications


  • Hagos SM, Z Feng, CD Burleyson, KS Lim, CN Long, D Wu, and G Thompson. 2014. "Evaluation of convection-permitting model simulations of cloud populations associated with the Madden-Julian Oscillation using data collected during the AMIE/DYNAMO field campaign." Journal of Geophysical Research. D. (Atmospheres) 119(21):12,052-12,068.  doi:10.1002/2014JD022143
  • Hagos SM, Z Feng, K Landu, and CN Long. 2014. "Advection, Moistening, and Shallow-to-deep Convection Transitions During the Initiation and Propagation of Madden-Julian Oscillation." Journal of Advances in Modeling Earth Systems 6(3):938-949.  doi:10.1002/2014MS000335
  • Hagos SM, LYR Leung, WI Gustafson, Jr, and B Singh. 2014. "Eddy Fluxes and Sensitivity of the Water Cycle to Spatial Resolution in Idealized Regional Aquaplanet Model Simulations." Climate Dynamics 42(3-4):931-940.  doi:10.1007/s00382-013-1857-y
  • Hagos SM, LYR Leung, Y Xue, A Boone, F de Sales, N Neupane, M Huang, and JH Yoon. 2014. "Assessment of Uncertainties in the Response of the African Monsoon Precipitation to Land Use change simulated by a regional model." Climate Dynamics 43(9-10):2765-2775.  doi:10.1007/s00382-014-2092-x
  • Landu K, LYR Leung, SM Hagos, V Vinoj, S Rauscher, T Ringler, and M Taylor. 2014. "The Dependence of ITCZ Structure on Model Resolution and Dynamical Core in Aquaplanet Simulations." Journal of Climate 27(6):2375-2385.  doi:10.1175/JCLI-D-13-00269.1


  • Hagos SM, LYR Leung, S Rauscher, and T Ringler. 2013. "Errors Characteristics of Two Grid Refinement Approaches in Aquaplanet Simulations: MPAS-A and WRF." Monthly Weather Review 141(9):3022-3036.  doi:10.1175/MWR-D-12-00338.1
  • Hagos SM, Z Feng, SA McFarlane, and LYR Leung. 2013. "Environment and the Lifetime of Tropical Deep Convection in a Cloud-Permitting Regional Model Simulation." Journal of the Atmospheric Sciences 70(8):2409-2425.  doi:10.1175/JAS-D-12-0260.1
  • Lee TY, X Tong, HW Shen, PC Wong, SM Hagos, and LYR Leung. 2013. "Feature Tracking and Visualization of Madden-Julian Osciallation in Climate Simulation." IEEE Computer Graphics and Applications 33(4):29-37.  doi:10.1109/MCG.2013.36
  • O'Brien TA, F Li, WD Collins, S Rauscher, T Ringler, M Taylor, SM Hagos, and LYR Leung. 2013. "Observed Scaling in Clouds and Precipitation and Scale Incognizance in Regional to Global Atmospheric Models." Journal of Climate 26(23):9313-9333.  doi:10.1175/JCLI-D-13-00005.1


  • Hagos SM, and LYR Leung. 2012. "Large-scale Environmental Variables and Transition to Deep Convection in Cloud Resolving Model Simulations: A Vector Representation." Journal of Advances in Modeling Earth Systems 4:M11001.  doi:10.1029/2012MS000155
  • Hagos SM, and LYR Leung. 2012. "On the relationship between uncertainties in tropical divergence and the hydrological cycle in global models." Journal of Climate 25(1):381-391.  doi:10.1175/JCLI-D-11-00058.1


  • Hagos SM, and LYR Leung. 2011. "Moist thermodynamics of the Madden-Julian Oscillation in a cloud resolving simulation." Journal of Climate 24(21):5571-5583.  doi:10.1175/2011JCLI4212.1
  • Hagos SM, LYR Leung, and J Dudhia. 2011. "Thermodynamics of the Madden-Julian Oscillation in a Regional Model with Constrained Moisture." Journal of the Atmospheric Sciences 68(9):1974-1989.  doi:10.1175/2011JAS3592.1
  • Zhao C, X Liu, LYR Leung, and SM Hagos. 2011. "Radiative impact of mineral dust on monsoon precipitation variability over West Africa ." Atmospheric Chemistry and Physics 11(5):1879-1893.  doi:10.5194/acp-11-1879-2011


  • Hagos SM, C Zhang, WK Tao, S Lang, YN Takayabu, S Shige, M Katsumata, B Olson, and TS L'Ecuyer. 2010. "Estimates of Tropical Diabatic Heating Profiles: Commonalities and Uncertainties." Journal of Climate 23(3):542-558.  doi:10.1175/2009JCLI3025.1
  • Hagos SM. 2010. "Building Blocks of Tropical Diabatic Heating." Journal of the Atmospheric Sciences 67(7):2341-2354.  doi:10.1175/2010JAS3252.1
  • Zhang C, J Ling, SM Hagos, WK Tao, S Lang, YN Takayabu, S Shige, M Katsumata, WS Olson, and TS L'Ecuyer. 2010. "MJO Signals in Latent Heating: Results from TRMM Retrievals." Journal of the Atmospheric Sciences 67(11):3488-3508.  doi:10.1175/2010JAS3398.1


  • Hagos SM, and C Zhang. 2009. "Diabatic heating, divergent circulation and moisture transport in the African monsoon system." Quarterly Journal of the Royal Meteorological Society 136(S1):411-425.  doi:10.1002/qj.538

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