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Atmospheric Science & Global Change

Staff information

Koichi Sakaguchi

Global Atmospheric Modeling
Earth Scientist
Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352

PNNL Publications


  • Sakaguchi K., L. Leung, C.M. Zarzycki, J. Jang, S. McGinnis, S. McGinnis, and B.E. Harrop, et al. 2023. "Technical descriptions of the experimental dynamical downscaling simulations over North America by the CAM-MPAS variable-resolution model." Geoscientific Model Development 16, no. 10:3029-3081. PNNL-SA-179477. doi:10.5194/gmd-16-3029-2023


  • Hagos S.M., J. Chen, K.A. Barber, K. Sakaguchi, R.S. Plant, Z. Feng, and H. Xiao. 2022. "A Machine-Learning-Assisted Stochastic Cloud Population Model as a Parameterization of Cumulus Convection." Journal of Advances in Modeling Earth Systems 14, no. 7:e2021MS002808. PNNL-SA-162336. doi:10.1029/2021MS002808
  • Jang J., W. Skamarock, S.H. Park, C. Zarzycki, K. Sakaguchi, and L. Leung. 2022. "Effect of the Grell-Freitas Deep Convection Scheme in Quasi-uniform and Variable resolution Aquaplanet CAM Simulations." Journal of Advances in Modeling Earth Systems 14, no. 6:Art. No. e2020MS002459. PNNL-SA-163480. doi:10.1029/2020MS002459
  • Ovchinnikov M., J.D. Fast, L.K. Berg, W.I. Gustafson, J. Chen, K. Sakaguchi, and H. Xiao. 2022. "Effects of Horizontal Resolution, Domain Size, Boundary Conditions, and Surface Heterogeneity on Coarse LES of a Convective Boundary Layer." Monthly Weather Review 150, no. 6:1397-1415. PNNL-SA-156347. doi:10.1175/MWR-D-21-0244.1
  • Sakaguchi K., L.K. Berg, J. Chen, J.D. Fast, R.K. Newsom, S. Tai, and Z. Yang, et al. 2022. "Determining Spatial Scales of Soil Moisture - Cloud Coupling Pathways using Semi-Idealized Simulations." Journal of Geophysical Research: Atmospheres 127, no. 2:Art. No. e2021JD035282. PNNL-SA-162397. doi:10.1029/2021JD035282


  • Feng Z., F. Song, K. Sakaguchi, and L. Leung. 2021. "Evaluation of Mesoscale Convective Systems in Climate Simulations: Methodological Development and Results from MPAS-CAM over the United States." Journal of Climate 34, no. 7:2611-2633. PNNL-SA-151716. doi:10.1175/JCLI-D-20-0136.1
  • Liang Y., B. Yang, M. Wang, J. Tang, K. Sakaguchi, L. Leung, and X. Xu. 2021. "Multiscale Simulation of Precipitation over East Asia by Variable Resolution CAM-MPAS." Journal of Advances in Modeling Earth Systems 13, no. 11:Art. No. e2021MS002656. PNNL-SA-163477. doi:10.1029/2021MS002656
  • Song F., Z. Feng, L. Leung, B. Pokharel, S. Wang, X. Chen, and K. Sakaguchi, et al. 2021. "Crucial roles of eastward propagating environments in the summer MCS initiation over the US Great Plains." Journal of Geophysical Research: Atmospheres 126, no. 16:e2021JD034991. PNNL-SA-157771. doi:10.1029/2021JD034991
  • Yang Z., M. Huang, L.K. Berg, Y. Qian, W.I. Gustafson, Y. Fang, and Y. Liu, et al. 2021. "Impact of Lateral Flow on Surface Water and Energy Budgets over the Southern Great Plains - A Modeling Study." Journal of Geophysical Research: Atmospheres 126, no. 12:e2020JD033659. PNNL-SA-157977. doi:10.1029/2020JD033659


  • Gutowski W., P. Ullrich, A. Hall, L. Leung, T.A. O'Brien, C. Patricola, and R. Arritt, et al. 2020. "The ongoing need for high-resolution regional climate models: Process understanding and stakeholder information." Bulletin of the American Meteorological Society 101, no. 5:E664-E683. PNNL-SA-147322. doi:10.1175/BAMS-D-19-0113.1
  • Yang Z., Y. Qian, Y. Liu, L.K. Berg, W.I. Gustafson, Z. Feng, and K. Sakaguchi, et al. 2020. "Understanding Irrigation Impacts on Low-Level Jets over the Great Plains." Climate Dynamics 55, no. 3-4:925-943. PNNL-SA-146743. doi:10.1007/s00382-020-05301-7


  • Chen G., J. Norris, D. Neelin, J. Lu, L. Leung, and K. Sakaguchi. 2019. "Thermodynamic and Dynamic Mechanisms for Hydrological Cycle Intensification over the Full Probability Distribution of Precipitation Events." Journal of the Atmospheric Sciences 76, no. 2:497-516. PNNL-SA-132710. doi:10.1175/JAS-D-18-0067.1
  • Fast J.D., L.K. Berg, Z. Feng, F. Mei, R.K. Newsom, K. Sakaguchi, and H. Xiao. 2019. "The Impact of Variable Land-Atmosphere Coupling on Convective Cloud Populations Observed During the 2016 HI-SCALE Field Campaign." Journal of Advances in Modeling Earth Systems 11, no. 8:2629-2654. PNNL-SA-143151. doi:10.1029/2019MS001727


  • Gross M., H. Wan, P.J. Rasch, P.M. Caldwell, D.L. Williamson, D. Klocke, and C. Jablonowski, et al. 2018. "Physics-Dynamics Coupling in weather, climate and Earth system modesl: Challenges and recent progress." Monthly Weather Review 146, no. 11:3505-3544. PNNL-SA-137579. doi:10.1175/MWR-D-17-0345.1
  • Gross M., H. Wan, P.J. Rasch, P.M. Caldwell, D.L. WIlliamson, D. Klocke, and C. Jablonowski, et al. 2018. "Physics-Dynamics Coupling in Weather, Climate, and Earth System Models: Challenges and Recent Progress." Monthly Weather Review 146, no. 11:3505-3544. PNNL-SA-115484. doi:10.1175/MWR-D-17-0345.1
  • Hagos S.M., L. Leung, C. Zhao, Z. Feng, and K. Sakaguchi. 2018. "How do microphysical processes influence large-scale precipitation variability and extremes?." Geophysical Research Letters 45, no. 3:1661-1667. PNNL-SA-130576. doi:10.1002/2017GL076375
  • Sakaguchi K., L. Leung, C.D. Burleyson, H. Xiao, and H. Wan. 2018. "Role of Troposphere-Convection-Land Coupling in the Southwestern Amazon Precipitation Bias of the Community Earth System Model version 1 (CESM1)." Journal of Geophysical Research: Atmospheres 123, no. 16:8374-8399. PNNL-SA-134715. doi:10.1029/2018JD028999


  • Yang Q., L. Leung, J. Lu, Y. Lin, S.M. Hagos, K. Sakaguchi, and Y. Gao. 2017. "Exploring the effects of a nonhydrostatic dynamical core in high-resolution aquaplanet simulations." Journal of Geophysical Research: Atmospheres 122, no. 6:3245-3265. PNNL-SA-124394. doi:10.1002/2016JD025287


  • Sakaguchi K., J. Lu, L. Leung, C. Zhao, Y. Li, and S.M. Hagos. 2016. "Sources and Pathways of the Upscale Effects on the Southern Hemisphere Jet in MPAS-CAM4 Variable-Resolution Simulations." Journal of Advances in Modeling Earth Systems 8, no. 4:1786-1805. PNNL-SA-120998. doi:10.1002/2016MS000743
  • Sakaguchi K., X. Zeng, L. Leung, and P. Shao. 2016. "Influence of dynamic vegetation on carbon-nitrogen cycle feedback in the Community Land Model (CLM4)." Environmental Research Letters 11, no. 12:124029. PNNL-SA-115218. doi:10.1088/1748-9326/aa51d9
  • Zhang K., C. Zhao, H. Wan, Y. Qian, R.C. Easter, S.J. Ghan, and K. Sakaguchi, et al. 2016. "Quantifying the impact of sub-grid surface wind variability on sea salt and dust emissions in CAM5." Geoscientific Model Development 9, no. 2:607-632. PNNL-SA-111502. doi:10.5194/gmd-9-607-2016
  • Zhao C., L. Leung, S. Park, S.M. Hagos, J. Lu, K. Sakaguchi, and J. Yoon, et al. 2016. "Exploring the impacts of physics and resolution on aqua-planet simulations from a non-hydrostatic global variable-resolution modeling framework." Journal of Advances in Modeling Earth Systems 8, no. 4:1751-1768. PNNL-SA-118452. doi:10.1002/2016MS000727


  • Lu J., G. Chen, L. Leung, D.A. Burrows, Q. Yang, K. Sakaguchi, and S.M. Hagos. 2015. "Toward the Dynamical Convergence on the Jet Stream in Aquaplanet AGCMs." Journal of Climate 28, no. 17:6763-6782. PNNL-SA-111542. doi:10.1175/JCLI-D-14-00761.1
  • Sakaguchi K., L. Leung, C. Zhao, Q. Yang, J. Lu, S.M. Hagos, and S. Rauscher, et al. 2015. "Exploring a Multi-resolution Approach Using AMIP Simulations." Journal of Climate 28, no. 14:5549-5574. PNNL-SA-106250. doi:10.1175/JCLI-D-14-00729.1

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