Skip to Main Content U.S. Department of Energy
Fundamental and Computational Sciences Directorate

Staff information

Po-Lun Ma

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

Research Interests

  • Aerosol-cloud-precipitation interactions
  • Global and regional earth system modeling
  • Cloud physics
  • Satellite simulator
  • Uncertainty quantification

Education and Credentials

  • Ph.D., Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, 2010
  • M.S.E.L., cum laude, Vermont Law School, South Royalton, VT, 2002
  • M.S., Atmospheric Sciences, National Taiwan University, Taipei, Taiwan, 2002
  • B.S., Atmospheric Sciences, National Taiwan University, Taipei, Taiwan, 1999

Affiliations and Professional Service

  • Member, American Geophysical Union, 2006-present
  • Member, American Meteorological Society, 2006-present
  • Aerosol Liaison, CESM Chemistry-Climate Working Group, 2012-2014

Awards and Recognitions

  • Outstanding Contribution Award, ACME, 2016
  • Outstanding Performance Award, PNNL, 2014
  • Exceptional Contribution Program Award, PNNL, 2013
  • Goddard Summer Internship, JCET/UMBC, 2006
  • Fellowship, Johns Hopkins University, 2005
  • Certification for System Operation, Global Imaging Inc., 2003
  • Dean's Award, National Taiwan University, 2001

PNNL Publications


  • Fan T, X Liu, PL Ma, Q Zhang, Z Li, Y Jiang, F Zhang, C Zhao, X Yang, F Wu, and Y Wang. 2018. "Emission or atmospheric processes? An attempt to attribute the source of large bias of aerosols in eastern China simulated by global climate models." Atmospheric Chemistry and Physics 18(2):1395-1417.  doi:10.5194/acp-18-1395-2018


  • Kassianov EI, MS Pekour, CJ Flynn, LK Berg, J Beranek, A Zelenyuk, C Zhao, LYR Leung, PL Ma, LD Riihimaki, JD Fast, JC Barnard, AG Hallar, I McCubbin, EW Eloranta, A McComiskey, and PJ Rasch. 2017. "Large Contribution of Coarse Mode to Aerosol Microphysical and Optical Properties: Evidence from Ground-based Observations of a Transpacific Dust Outbreak at a High-Elevation North American Site." Journal of the Atmospheric Sciences 74(5):1431-1443.  doi:10.1175/JAS-D-16-0256.1
  • Wall CJ, DL Hartmann, and PL Ma. 2017. "Instantaneous linkages between clouds and large-scale meteorology over the Southern Ocean in observations and a climate model." Journal of Climate 30(23):9455-9474.  doi:10.1175/JCLI-D-17-0156.1
  • Yang B, Y Qian, LK Berg, PL Ma, S Wharton, V Bulaevskaya, H Yan, Z Hou, and WJ Shaw. 2017. "Sensitivity of Turbine-Height Wind Speeds to Parameters in Planetary Boundary-Layer and Surface-Layer Schemes in the Weather Research and Forecasting Model." Boundary-Layer Meteorology 162(1):117-142.  doi:10.1007/s10546-016-0185-2
  • Yang Y, H Wang, SJ Smith, PL Ma, and PJ Rasch. 2017. "Source attribution of black carbon and its direct radiative forcing in China." Atmospheric Chemistry and Physics 17(6):4319-4336.  doi:10.5194/acp-17-4319-2017
  • Yang Y, H Wang, SJ Smith, RC Easter, Jr, PL Ma, Y Qian, H Yu, C Li, and PJ Rasch. 2017. "Global source attribution of sulfate concentration and direct and indirect radiative forcing." Atmospheric Chemistry and Physics 17(14):8903-8922.  doi:10.5194/acp-17-8903-2017
  • Yun Y, J Fan, H Xiao, G Zhang, SJ Ghan, KM Xu, PL Ma, and WI Gustafson. 2017. "Assessing the Resolution Adaptability of the Zhang-McFarlane Cumulus Parameterization with Spatial and Temporal Averaging." Journal of Advances in Modeling Earth Systems 9(7):2753-2770.  doi:10.1002/2017MS001035
  • Zhang Z, X Dong, B Xi, H Song, PL Ma, SJ Ghan, S Platnick, and P Minnis. 2017. "Intercomparisons of marine boundary layer cloud properties from the ARM CAP-MBL campaign and two MODIS cloud products." Journal of Geophysical Research. D. (Atmospheres) 122(4):2351-2365.  doi:10.1002/2016JD025763


  • Kristiansen NI, A Stohl, DJ Olivie , B Croft, OA Sovde, H Klein , T Christoudias, D Kunkel , SJ Leadbetter, YH Lee, K Zhang, K Tsigaridis, T Bergman, N Evangeliou, H Wang, PL Ma, RC Easter, Jr, PJ Rasch, X Liu, G Pitari, G Di Genova, SY Zhao, Y Balkanski, S Bauer, G Faluvegi, H Kokkola, RV Martin, JR Pierce, M Schulz, D Shindell , H Tost, and H Zhang . 2016. "Evaluation of observed and modelled aerosol lifetimes using radioactive tracers of opportunity and an ensemble of 19 global models." Atmospheric Chemistry and Physics 16(5):3525-3561.  doi:10.5194/acp-16-3525-2016
  • Liu X, PL Ma, H Wang, S Tilmes, B Singh, RC Easter, Jr, SJ Ghan, and PJ Rasch. 2016. "Description and Evaluation of a New Four-Mode Version of the Modal Aerosol Module (MAM4) within Version 5.3 of the Community Atmosphere Model." Geoscientific Model Development 9(2):505-522.  doi:10.5194/gmd-9-505-2016
  • Wang Y, PL Ma, J Jiang, H Su, and PJ Rasch. 2016. "Toward reconciling the influence of atmospheric aerosols and greenhouse gases on light precipitation changes in Eastern China." Journal of Geophysical Research. D. (Atmospheres) 121(10):5878-5887.  doi:10.1002/2016JD024845


  • Ma PL, PJ Rasch, M Wang, H Wang, SJ Ghan, RC Easter, Jr, WI Gustafson, Jr, X Liu, Y Zhang, and HY Ma. 2015. "How Does Increasing Horizontal Resolution in a Global Climate Model Improve the Simulation of Aerosol-Cloud Interactions?" Geophysical Research Letters 42(12):5058-5065.  doi:10.1002/2015GL064183
  • Gustafson WI, Jr, PL Ma, and B Singh. 2015. "Precipitation characteristics of CAM5 physics at mesoscale resolution during MC3E and the impact of convective timescale choice." Journal of Advances in Modeling Earth Systems 6(4):1271-1287.  doi:10.1002/2014ms000334
  • Ma HY, CC Chuang, SA Klein, MH Lo, Y Zhang, X Shaocheng, PL Ma, and TJ Phillips. 2015. "An improved hindcast approach for evaluation and diagnosis of physical processes in global climate models." Journal of Advances in Modeling Earth Systems 7(4):1810-1827.  doi:10.1002/2015MS000490
  • Martini M, WI Gustafson, Jr, TA O'Brien, and PL Ma. 2015. "Evaluation of Tropical Channel Refinement using MPAS-A Aquaplanet Simulations." Journal of Advances in Modeling Earth Systems 7(3):1351-1367.  doi:10.1002/2015MS000470
  • McCoy D, SM Burrows, R Wood, DP Grosvenor, S Elliott, PL Ma, PJ Rasch, and DL Hartmann. 2015. "Natural Aerosols Explain Seasonal and Spatial Patterns of Southern Ocean Cloud Albedo." Science Advances 1(6):Art. No. e1500157.  doi:10.1126/sciadv.1500157
  • Shrivastava MKB, RC Easter, Jr, X Liu, A Zelenyuk, B Singh, K Zhang, PL Ma, D Chand, SJ Ghan, JL Jiminez, Q Zhang, JD Fast, PJ Rasch, and P Tiitta. 2015. "Global transformation and fate of SOA: Implications of Low Volatility SOA and Gas-Phase Fragmentation Reactions ." Journal of Geophysical Research. D. (Atmospheres) 120(9):4169-4195.  doi:10.1002/2014JD022563
  • Tilmes S, JF Lamarque, L Emmons, DE Kinnison, PL Ma, X Liu, SJ Ghan, C Bardeen, S Arnold, M Deeter, F Vitt, TB Ryerson, JW Elkins, F Moore, R Spackman, and MV Martin. 2015. "Description and Evaluation of Tropospheric Chemistry and Aerosols in the Community Earth System Model (CESM1.2)." Geoscientific Model Development 8(5):1395-1426.  doi:10.5194/gmd-8-1395-2015
  • Zhang R, H Wang, DA Hegg, Y Qian, SJ Doherty, C Dang, PL Ma, PJ Rasch, and Q Fu. 2015. "Quantifying sources of black carbon in Western North America using observationally based analysis and an emission tagging technique in the Community Atmosphere Model." Atmospheric Chemistry and Physics 15(22):12805-12822.  doi:10.5194/acp-15-12805-2015
  • Zhang R, H Wang, Y Qian, PJ Rasch, RC Easter, Jr, PL Ma, B Singh, J Huang, and Q Fu. 2015. "Quantifying sources, transport, deposition, and radiative forcing of black carbon over the Himalayas and Tibetan Plateau." Atmospheric Chemistry and Physics 15(11):6205-6223.  doi:10.5194/acp-15-6205-2015


  • Ma PL, PJ Rasch, JD Fast, RC Easter, Jr, WI Gustafson, Jr, X Liu, SJ Ghan, and B Singh. 2014. "Assessing the CAM5 Physics Suite in the WRF-Chem Model: Implementation, Resolution Sensitivity, and a First Evaluation for a Regional Case Study." Geoscientific Model Development 7(3):755-778.  doi:10.5194/gmd-7-755-2014
  • Zhang K, H Wan, X Liu, SJ Ghan, GJ Kooperman, PL Ma, PJ Rasch, D Neubauer, and U Lohmann. 2014. "Technical Note: On the Use of Nudging for Aerosol-Climate Model Intercomparison Studies." Atmospheric Chemistry and Physics 14(16):8631-8645.  doi:10.5194/acp-14-8631-2014
  • Lim KS, J Fan, LYR Leung, PL Ma, B Singh, C Zhao, Y Zhang, G Zhang, and X Song. 2014. "Investigation of Aerosol Indirect Effects using a Cumulus Microphysics Parameterization in a Regional Climate Model." Journal of Geophysical Research. D. (Atmospheres) 119(2):906-926.  doi:10.1002/2013JD020958
  • Vinoj V, PJ Rasch, H Wang, JH Yoon, PL Ma, K Landu, and B Singh. 2014. "Short-term modulation of Indian summer monsoon rainfall by West Asian dust." Nature Geoscience 7 :308-313.  doi:10.1038/NGEO2107
  • Wang H, PJ Rasch, RC Easter, Jr, B Singh, R Zhang, PL Ma, Y Qian, SJ Ghan, and N Beagley. 2014. "Using an Explicit Emission Tagging Method in Global Modeling of Source-Receptor Relationships for Black Carbon in the Arctic: Variations, Sources and Transport Pathways." Journal of Geophysical Research. D. (Atmospheres) 119(12):12,888-12,909.  doi:10.1002/2014JD022297


  • Ma PL, JR Gattiker, X Liu, and PJ Rasch. 2013. "A Novel Approach for Determining Source-Receptor Relationships in Model Simulations: A Case Study of Black Carbon Transport in Northern Hemisphere Winter." Environmental Research Letters 8(2):Article No. 02042.  doi:10.1088/1748-9326/8/2/024042
  • Gustafson WI, Jr, PL Ma, H Xiao, B Singh, PJ Rasch, and JD Fast. 2013. "The Separate Physics and Dynamics Experiment (SPADE) framework for determining resolution awareness: A case study of microphysics." Journal of Geophysical Research. D. (Atmospheres) 118(16):9258-9276.  doi:10.1002/jgrd.50711
  • Ma PL, PJ Rasch, H Wang, K Zhang, RC Easter, Jr, S Tilmes, JD Fast, X Liu, JH Yoon, and JF Lamarque. 2013. "The Role of Circulation Features on Black Carbon Transport into the Arctic in the Community Atmosphere Model Version 5 (CAM5)." Journal of Geophysical Research. D. (Atmospheres) 118(10):4657-4669.  doi:10.1002/jgrd.50411
  • Wang H, RC Easter, Jr, PJ Rasch, M Wang, X Liu, SJ Ghan, Y Qian, JH Yoon, PL Ma, and V Vinoj. 2013. "Sensitivity of Remote Aerosol Distributions to Representation of Cloud-Aerosol Interactions in a Global Climate Model." Geoscientific Model Development 6(3):765-782.  doi:10.5194/gmd-6-765-2013
  • Zhao C, X Liu, Y Qian, JH Yoon, Z Hou, G Lin, SA McFarlane, H Wang, B Yang, PL Ma, H Yan, and J Bao. 2013. "A Sensitivity Study of Radiative Fluxes at the Top of Atmosphere to Cloud-Microphysics and Aerosol Parameters in the Community Atmosphere Model CAM5." Atmospheric Chemistry and Physics 13:10969-10987.  doi:10.5194/acp-13-10969-2013


  • Ma PL, K Zhang, JJ Shi, T Matsui, and A Arking. 2012. "Direct Radiative Effect of Mineral Dust on the Development of African Easterly Waves in Late Summer, 2003-07." Journal of Applied Meteorology and Climatology 51(12):2090-2104.  doi:10.1175/JAMC-D-11-0215.1
  • Yoon JH, and PL Ma. 2012. "Ocean General Circulation Models." In Encyclopedia of Sustainability Science and Technology, ed. RA Meyers, pp. 7365-7381.  Springer, New York, NY. 

Science at PNNL

Core Research Areas

User Facilities

Centers & Institutes

Research Highlights

View All Research Highlights & Staff Accomplishments

RSS Feed