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Staff information

Chitra Sivaraman

Chitra Sivaraman

Data Sciences
Scientist, TL
Pacific Northwest National Laboratory
PO Box 999
MSIN: K7-22
Richland, WA 99352


Chitra Sivaraman is currently acting as the Associate Division Director for Data Science within PCSD's Advanced Computing, Mathematics, and Data Division. ( She is also the Group Lead for the Data Integration group at PNNL that supports DOE's Atmospheric Radiation Measurement Program (ARM) and EERE's Atmosphere to Electron (A2e) Initiative.

In her capacity as manager for the Data Integration group, she manages the development of software products across five Department of Energy laboratories that include Pacific Northwest National Laboratory, Oakridge National Laboratory, Brookhaven National Laboratory, Livermore National Laboratory and Argonne National Laboratory.

The Data Integration group manages data from 360+ instruments from 4 permanent sites and 3 mobile facilities with an average daily incoming data of 750 GB with 45,000 files/day. These products are collected, calibrated, processed and combined to produce higher quality data and delivered to the ARM Data. The group engages with instrument mentors, translators, external developers, the Data Quality Office, and Data Archive staff to ensure completeness in all steps required for ARM data production.

As manager, Chitra ensures tasks and projects have clear scope, schedule and resource requirements. She also ensures that projects are adequately planned, technically sound, risks are addressed and results are delivered on schedule.

Research Interests

  • Chitra's research interests are in the areas of scientific data management and development of software products to fulfill unmet measurement needs and the representation of this data in models.

Education and Credentials

  • Stanford University, Stanford, CA
  • University of Illinois, Urbana-Champaign, IL

PNNL Publications


  • Lim KS, LD Riihimaki, JM Comstock, B Schmid, C Sivaraman, Y Shi, and G McFarquhar. 2016. "Evalution of long-term surface-retrieved cloud-droplet number concentration with in situ aircraft observations." Journal of Geophysical Research. D. (Atmospheres) 121(5):2318-2331.  doi:10.1002/2015JD024082


  • Parworth C, JD Fast, F Mei, TR Shippert, C Sivaraman, A Tilp, T Watson, and Q Zhang. 2015. "Long-term Measurements of Submicrometer Aerosol Chemistry at the Southern Great Plains (SGP) Using an Aerosol Chemical Speciation Monitor (ACSM)." Atmospheric Environment 106:43-55.  doi:10.1016/j.atmosenv.2015.01.060



  • Kassianov EI, CJ Flynn, AS Koontz, C Sivaraman, and JC Barnard. 2013. "Failure and Redemption of Multifilter Rotating Shadowband Radiometer (MFRSR)/Normal Incidence Multifilter Radiometer (NIMFR) Cloud Screening: Contrasting Algorithm Performance at Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) and Southern Great Plains (SGP) Sites." Atmosphere 4(3):299-314.  doi:10.3390/atmos4030299
  • Thorsen TJ, Q Fu, JM Comstock, C Sivaraman, MA Vaughan, D Winker, and DD Turner. 2013. "Macrophysical Properties of Tropical Cirrus Clouds from the CALIPSO Satellite and from Ground-based Micropulse and Raman Lidars." Journal of Geophysical Research. D. (Atmospheres) 118(16):9209-9220.  doi:10.1002/jgrd.50691


  • Dupont JC, M Haeffelin, Y Morille, JM Comstock, CJ Flynn, CN Long, C Sivaraman, and RK Newsom. 2011. "Cloud properties derived from two lidars over the ARM SGP site." Geophysical Research Letters 38:Article No. L08814.  doi:10.1029/2010GL046274
  • Paulson PR, TE Carroll, C Sivaraman, PA Neorr, SD Unwin, and SS Hossain. 2011. "Simplifying Probability Elicitation and Uncertainty Modeling in Bayesian Networks." In Proceedings of the 22nd Midwest Artificial Intelligence and Cognitive Science Conference (MAICS 2011), April 16-17, 2011, Cincinnati, OH, ed. S Visa, A Inoue and AL Ralescu, pp. 114-119.  Omnipress, Madison, WI. 


  • Newsom RK, DD Turner, B Mielke, MF Clayton, R Ferrare, and C Sivaraman. 2009. "Simultaneous analog and photon counting detection for Raman lidar." Applied Optics 48(20):3903-3914. 


  • Whelan G, WD Millard, GM Gelston, TP Khangaonkar, MA Pelton, DL Strenge, Z Yang, C Lee, C Sivaraman, AJ Stephan, BL Hoopes, and KJ Castleton. 2007. "Using FRAMES to Manage Environmental and Water Resources." In Proceedings of the World Environmental and Water Resources Congress 2007: Restoring our Natural Habitat, May 15-19, 2007, Tampa, Florida, USA, ed. Karen C. Kabbes.  American Society of Civil Engineers, Reston, VA.  doi:10.1061/40927(243)130


  • Whelan G, WD Millard, GM Gelston, MA Pelton, Z Yang, DL Strenge, C Lee, C Sivaraman, MJ Simpson, JK Young, TP Khangaonkar, TR Downing, BL Hoopes, and LE Hachmeister. 2006. Rapid Risk Assessment: FY05 Annual Summary ReportPNNL-15697, Pacific Northwest National Laboratory, Richland, WA. 


Advanced Computing, Mathematics, and Data


Seminar Series

Science at PNNL

ACMDD Research

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