Dr. Zhong Liu

Dr. Zhong Liu

  • SCIENTIST
  • 301.614.5764 | 301.614.5268
  • NASA/GSFC
  • Mail Code: 610.2
  • Greenbelt , MD 20771
  • Employer: GEORGE MASON UNIVERSITY
  • Brief Bio

    Dr. Zhong Liu is a research professor at the Center for Spatial Information Science and Systems (CSISS), College of Science, at George Mason University. He is a member of the NASA GES DISC Data Support Team to provide science and data support for NASA-JAXA TRMM, GPM, GPCP-3 and other global precipitation data sets. Over the years, Dr. Liu has been working on data services and tools for fast and easy access of NASA high volume data products. He was the lead developer for the NOAA/NESDIS Interactive Multi-sensor Snow and Ice Mapping System (IMS) project. He initiated the TRMM Online Visualization and Analysis System (TOVAS), the very first instance of the NASA Goddard Giovanni family. He was the lead developer of the Hurricane Data Analysis Tool (HDAT) at the GES DISC Hurricane Portal. He is the principal investigator for "Integrate IPWG Validation Algorithms into TRMM Online Visualization and Analysis System (TOVAS)" and was a co-investigator of "Integrating NASA Earth Science Enterprise Data into Global Agricultural Decision Support Systems" and the lead developer of the global agriculture information system.

    Research Interests

    Satellite remote sensing; Precipitation research (uncertainty, inter-comparison, etc.) and applications; Earth Observing Data and Information Systems; Interdisciplinary research; TRMM/GPM service development and user support

    Current Projects

    GES DISC GIOVANNI; TRMM, GPM, GPCP-3

    Positions/Employment

    7/1999 - Present

    Research Professor

    CSISS, George Mason University, 4400 University Drive, Fairfax, VA A contract scientist at the NASA GSFC Goddard Earth Sciences Data and Information Services Center (GES DISC).
    7/1997 - 7/1999

    Senior Research Scientist

    SMART, Inc., Lanham, MD A contract scientist at the NOAA NSDIS.
    9/1995 - 7/1997

    Research Associate

    Byrd Polar Research Center at the Ohio State University, Columbus, Ohio Worked on Antartic boundary layer meteorology (katabatic wind) and sea ice.

    Education

    • The Ohio State University, Columbus, OH, PhD, Atmospheric Sciences (David Bromwich, Jeff Rogers)
    • South Dakota School of Mines and Technology, SD, MS, Meteorology (Paul Smith)
    • Shandong College of Oceanography, China, BS, Marine Meteorology

    Professional Societies

    AMS, AGU and International Precipitation Working Group (IPWG), 1991 - Present

    Professional Service

    Reviewer for Nature-Climate Change, J. Climate, JGR, J. Hydrometeorology, Atmospheric Research, Climate, etc. Reviewer for NASA research programs.

    Awards

    • NASA Group Achievement Award for Innovative Multi-mission Data Services (2009)
    • NASA Group Achievement Award for Earth Science Data Search, Exploration and Access Implement Team (Giovanni and Mirador) (2009)
    • NASA GSFC Robert H. Goddard Honor Award for Engineering (2008)
    • NASA GSFC Robert H. Goddard Honor Award for Outreach (2008)
    • Quarterly Customer Service Excellence Award from NASA GSFC (2001)
    • Customer Service Excellence Award from NASA GSFC (2001)
    • Antarctic Service Medal issued by National Science Foundation
    • Antarctic Service Medal issued by U.S. Navy

    Grants

    07/01/2011 Integrate IPWG Validation Algorithms into TRMM Online Visualization and Analysis System (TOVAS), George Mason University, NASA NRA #: NNH10ZDA001N-ESDRERR

    Precipitation is difficult to measure and predict. Each year droughts and floods cause severe property damages and human casualties around the world. Accurate measurement and forecast are important for mitigation and preparedness efforts. Significant progress has been made over the past decade in satellite precipitation product development. In particular, products’ spatial and temporal resolutions as well as timely availability have been improved by blended techniques. Their resulting products are widely used in various research and applications. However biases and uncertainties are common among precipitation products and an obstacle exists in quickly gaining knowledge of product quality, biases and behavior at a local or regional scale, namely user defined areas or points of interest. Current online inter-comparison and validation services have not addressed this issue adequately. To expedite the use of satellite precipitation products, the obstacle needs to be removed.

    We have developed a Technology Readiness Level 7 (TRL-7) prototype (http://disc2.nascom.nasa.gov/Giovanni/tovas/rain.ipwg.shtml) in the TRMM Online Visualization and Analysis System (TOVAS) to address this issue (Liu et al. 2009, IPWG Special Issue in Journal of Applied Meteorology and Climatology). Despite its limited functionality and datasets, users can use this tool to generate customized plots within the United States for 2005. In addition, users can download customized data for further analysis, e.g. comparing their gauge data.

    To meet increasing demands, we propose to integrate IPWG (International Precipitation Working Group) Validation Algorithms/statistics into TOVAS, allowing users to generate customized plots and data. In addition, we will expand the current coverage from the United States to global for daily, monthly and their climatology products. Whenever the TRMM science team changes their product version number, users would like to know the differences by inter-comparing both versions of TRMM products in their areas of interest. Making this service available to users will help them to better understand associated changes. We plan to implement this inter-comparison in TRMM standard monthly products with the IPWG algorithms. Monthly precipitation and their climatology products are important for many applications. Knowing differences among them will help researchers and application users. We plan to expand the existing monthly products and services.

    The proposed additions will complement and accelerate the existing and ongoing validation activities in the community as well as enhance data services for TRMM and the future Global Precipitation Mission (GPM).

    Project Publications:

    Liu, Z. 2016, Comparison of Integrated Multi-satellitE Retrievals for GPM (IMERG) and TRMM Multi-satellite Precipitation Analysis (TMPA) Monthly Precipitation Products: Initial Results, Journal of Hydrometeorology; doi: http://dx.doi.org/10.1175/JHM-D-15-0068.1; in press.

    Satya Prakash, Ashis K. Mitra, Amir AghaKouchak, Zhong Liu, Hamidreza Norouzi, D.S. Pai. (2016) A preliminary assessment of GPM-based multi-satellite precipitation estimates over a monsoon dominated region. Journal of Hydrology. Online publication date: 1-Jan-2016.

    Liu, Z. 2015, Evaluation of Precipitation Climatology Derived from TRMM Multi-Satellite Precipitation Analysis (TMPA) Monthly Product over Land with Two Gauge-Based Products. Climate , 3, 964-982, http://www.mdpi.com/2225-1154/3/4/964

    Mantas, V.M. Mantas, Z. Liu, C. Caro, A.J.S.C. Pereira. (2015) Validation of TRMM multi-satellite precipitation analysis (TMPA) products in the Peruvian Andes. Atmospheric Research 163, 132-145.

    Mantas, V.M., Z. Liu, A.J.S.C. Pereira. (2015) A web service and android application for the distribution of rainfall estimates and Earth observation data. Computers & Geosciences 77, 66-76.

    Liu, Z., 2015, Comparison of precipitation estimates between Version 7 3-hourly TRMM Multi-Satellite Precipitation Analysis (TMPA) near-real-time and research products. Atmospheric Research, Volume 153, February 2015, Pages 119-133, Online: http://www.sciencedirect.com/science/article/pii/S0169809514003081

    Liu, Z., 2015, Comparison of Versions 6 and 7 3-Hourly TRMM Multi-Satellite Precipitation Analysis (TMPA) Research Products. Atmospheric Research, in press, Online: http://www.sciencedirect.com/science/article/pii/S0169809515000046

    Liu, Z., Ostrenga, D., Teng, W., Kempler, S., Milich, L., 2014, Developing GIOVANNI-based online prototypes to intercompare TRMM-related global gridded-precipitation products, Computers & Geosciences, volume 66, issue , year 2014, pp. 168 - 181

    Liu, Zhong, Dana Ostrenga, William L. Teng, and Steven J. Kempler, 2013. Implementing the International Precipitation Working Group (IPWG) Validation Statistics in Online Tools to Inter-compare and Characterize Satellite-derived Global Precipitation Products. 2013 American Geophysical Union Fall Meeting in San Francisco, 9-13 December 2013.

    Ostrenga, Dana; Zhong Liu, Steven J. Kempler, Bruce Vollmer, and William L. Teng, 2013. Preparing Precipitation Data Access, Value-added Services and Scientific Exploration Tools for the Integrated Multi-satellitE Retrievals for GPM (IMERG). 2013 American Geophysical Union Fall Meeting in San Francisco, 9-13 December 2013.

    Liu, Z., D. Ostrenga, W. Teng, and S. Kempler, 2013: Online Tools to Inter-compare TRMM Precipitation Products, 93nd AMS Annual Meeting, Jan 6-10, Austin, TX

    Liu, Z., D. Ostrenga, D. W. Teng, and S. Kempler, 2012, Utilizing Satellite-derived Precipitation Products in Hydrometeorological Applications (Invited), American Geophysical Union (AGU) 2012 Fall Meeting. December 3-7, 2012, San Francisco, CA

    Liu, Z., D. Ostrenga, W. Teng, S. Kempler, 2012, Online Inter-comparison of Satellite-derived Global Precipitation Products, Sixth Workshop of the International Precipitation Working Group, 15-19 October 2012, Sao Jose dos Campos, Brazil.

    Liu, Z, 2012, International Training on Satellite-derived Global Precipitation Products and Services, Sixth Workshop of the International Precipitation Working Group, 15-19 October 2012, Sao Jose dos Campos, Brazil.

    Liu, Z., D. Ostrenga, W. Teng, S. Kempler, 2012, TRMM Data Services at the NASA GES DISC, New and Emerging Technologies, Sensors, and Datasets for Precipitation at the Sixth Workshop of the International Precipitation Working Group, 15-19 October 2012, Sao Jose dos Campos, Brazil.

    Liu, Zhong, 2012. Developing Online Tools to Assess Uncertainty in Satellite-derived Global Precipitation Products. Climate Informatics 2012, Boulder, Colorado (selected for a partial travel fellowship support).

    Liu, Z, and D. Ostrenga, W. Teng, and S. J. Kempler, 2012, Online Assessment of Satellite-Derived Global Daily Precipitation Products, 92nd AMS Annual Meeting, Jan 22-26, New Orleans, LA

    Liu, Z, and D. Ostrenga, W. Teng, and S. J. Kempler, 2011, Online Evaluation of Satellite-Derived Global 3-Hourly Precipitation Products, American Geophysical Union (AGU) 2011 Fall Meeting. December 5-9, 2011, San Francisco, CA


     

    ; Principal investigator.

    Special Experience

    Three field trips to Antarctica to study katabatic winds.

    Selected Publications

    Refereed

    Liu, Z., J. Wang, S. Pan, and D. Meyer. 2019. "Improving Reproducibility in Earth Science Research." Eos, 100: [10.1029/2019eo136216]

    Liu, Z., D. Meyer, C.-L. Shie, and A. Li. 2019. "NASA Global Satellite and Model Data Products and Services for Tropical Cyclone Research." Current Topics in Tropical Cyclone Research [Working Title], [10.5772/intechopen.89720]

    Liu, Z., M. Jin, J. Liu, et al. A. Li, W. L. Teng, B. E. Vollmer, and D. J. Meyer. 2019. "Global Satellite Observations for Smart Cities." Boca Raton, FL, USA: CRC Press, Taylor & Francis Group, ISBN: 978-1138308770 .

    Prakash, S., A. K. Mitra, A. AghaKouchak, et al. Z. Liu, H. Norouzi, and D. Pai. 2018. "A preliminary assessment of GPM-based multi-satellite precipitation estimates over a monsoon dominated region." Journal of Hydrology, 556: 865-876 [10.1016/j.jhydrol.2016.01.029]

    Liu, Z., and J. Acker. 2017. "Giovanni: The Bridge Between Data and Science." Eos, 98: [10.1029/2017eo079299]

    Liu, Z., D. Ostrenga, B. Vollmer, et al. B. Deshong, K. Macritchie, M. Greene, and S. Kempler. 2017. "Global Precipitation Measurement Mission Products and Services at the NASA GES DISC." Bulletin of the American Meteorological Society, 98 (3): 437-444 [10.1175/bams-d-16-0023.1]

    Liu, Z. 2016. "Comparison of Integrated Multisatellite Retrievals for GPM (IMERG) and TRMM Multisatellite Precipitation Analysis (TMPA) Monthly Precipitation Products: Initial Results." Journal of Hydrometeorology, 17 (3): 777-790 [10.1175/jhm-d-15-0068.1]

    Mantas, V., Z. Liu, C. Caro, and A. Pereira. 2015. "Validation of TRMM multi-satellite precipitation analysis (TMPA) products in the Peruvian Andes." Atmospheric Research, 163: 132-145 [10.1016/j.atmosres.2014.11.012]

    Liu, Z. 2015. "Comparison of versions 6 and 7 3-hourly TRMM multi-satellite precipitation analysis (TMPA) research products." Atmospheric Research, 163: 91-101 [10.1016/j.atmosres.2014.12.015]

    Mantas, V., Z. Liu, and A. Pereira. 2015. "A web service and android application for the distribution of rainfall estimates and Earth observation data." Computers & Geosciences, 77: 66-76 [10.1016/j.cageo.2015.01.011]

    Liu, Z. 2015. "Comparison of precipitation estimates between Version 7 3-hourly TRMM Multi-Satellite Precipitation Analysis (TMPA) near-real-time and research products." Atmospheric Research, 153: 119-133 [10.1016/j.atmosres.2014.07.032]

    Liu, Z., D. Ostrenga, and G. Leptoukh. 2011. "Online Visualization and Analysis of Global Half-Hourly Infrared Satellite Data." Bulletin of the American Meteorological Society, 92 (4): 429-432 [10.1175/2010bams2976.1]

    Liu, Z., S. Kempler, W. Teng, et al. H. Rui, L. S. Chiu, and L. and Milich. 2010. "Global Agriculture Information System and its Applications." In Advanced Geoinformation Science, CRC Press: Taylor & Francis.

    Brief Bio

    Dr. Zhong Liu is a research professor at the Center for Spatial Information Science and Systems (CSISS), College of Science, at George Mason University. He is a member of the NASA GES DISC Data Support Team to provide science and data support for NASA-JAXA TRMM, GPM, GPCP-3 and other global precipitation data sets. Over the years, Dr. Liu has been working on data services and tools for fast and easy access of NASA high volume data products. He was the lead developer for the NOAA/NESDIS Interactive Multi-sensor Snow and Ice Mapping System (IMS) project. He initiated the TRMM Online Visualization and Analysis System (TOVAS), the very first instance of the NASA Goddard Giovanni family. He was the lead developer of the Hurricane Data Analysis Tool (HDAT) at the GES DISC Hurricane Portal. He is the principal investigator for "Integrate IPWG Validation Algorithms into TRMM Online Visualization and Analysis System (TOVAS)" and was a co-investigator of "Integrating NASA Earth Science Enterprise Data into Global Agricultural Decision Support Systems" and the lead developer of the global agriculture information system.

    Selected Publications

    Refereed

    Liu, Z., J. Wang, S. Pan, and D. Meyer. 2019. "Improving Reproducibility in Earth Science Research." Eos 100 [10.1029/2019eo136216]

    Liu, Z., D. Meyer, C.-L. Shie, and A. Li. 2019. "NASA Global Satellite and Model Data Products and Services for Tropical Cyclone Research." Current Topics in Tropical Cyclone Research [Working Title] [10.5772/intechopen.89720]

    Liu, Z., M. Jin, J. Liu, et al. A. Li, W. L. Teng, B. E. Vollmer, and D. J. Meyer. 2019. "Global Satellite Observations for Smart Cities."

    Prakash, S., A. K. Mitra, A. AghaKouchak, et al. Z. Liu, H. Norouzi, and D. Pai. 2018. "A preliminary assessment of GPM-based multi-satellite precipitation estimates over a monsoon dominated region." Journal of Hydrology 556 865-876 [10.1016/j.jhydrol.2016.01.029]

    Liu, Z., and J. Acker. 2017. "Giovanni: The Bridge Between Data and Science." Eos 98 [10.1029/2017eo079299]

    Liu, Z., D. Ostrenga, B. Vollmer, et al. B. Deshong, K. Macritchie, M. Greene, and S. Kempler. 2017. "Global Precipitation Measurement Mission Products and Services at the NASA GES DISC." Bulletin of the American Meteorological Society 98 (3): 437-444 [10.1175/bams-d-16-0023.1]

    Liu, Z. 2016. "Comparison of Integrated Multisatellite Retrievals for GPM (IMERG) and TRMM Multisatellite Precipitation Analysis (TMPA) Monthly Precipitation Products: Initial Results." Journal of Hydrometeorology 17 (3): 777-790 [10.1175/jhm-d-15-0068.1]

    Mantas, V., Z. Liu, C. Caro, and A. Pereira. 2015. "Validation of TRMM multi-satellite precipitation analysis (TMPA) products in the Peruvian Andes." Atmospheric Research 163 132-145 [10.1016/j.atmosres.2014.11.012]

    Liu, Z. 2015. "Comparison of versions 6 and 7 3-hourly TRMM multi-satellite precipitation analysis (TMPA) research products." Atmospheric Research 163 91-101 [10.1016/j.atmosres.2014.12.015]

    Mantas, V., Z. Liu, and A. Pereira. 2015. "A web service and android application for the distribution of rainfall estimates and Earth observation data." Computers & Geosciences 77 66-76 [10.1016/j.cageo.2015.01.011]

    Liu, Z. 2015. "Comparison of precipitation estimates between Version 7 3-hourly TRMM Multi-Satellite Precipitation Analysis (TMPA) near-real-time and research products." Atmospheric Research 153 119-133 [10.1016/j.atmosres.2014.07.032]

    Liu, Z., D. Ostrenga, and G. Leptoukh. 2011. "Online Visualization and Analysis of Global Half-Hourly Infrared Satellite Data." Bulletin of the American Meteorological Society 92 (4): 429-432 [10.1175/2010bams2976.1]

    Liu, Z., S. Kempler, W. Teng, et al. H. Rui, L. S. Chiu, and L. and Milich. 2010. "Global Agriculture Information System and its Applications." In Advanced Geoinformation Science CRC Press Taylor & Francis

                                                                                                                                                                                            
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