Mr. Rennie joined NCICS as a research associate in 2010, and currently supports maintenance and expansion of major land surface temperature datasets including the Global Historical Climatology Network (GHCN). These products are essential to address climate data needs on a national and international scale. Working in an operational, as well as a research environment, he focuses on modification and implementation of software for utilization in data processing, including ingest, quality control, and homogeneity adjustments.
Mr. Rennie is an active member of the International Surface Temperature Initiative (ISTI), which aims to improve the instrumental data record, while maintaining openness and transparency. One of their major goals is to create a single comprehensive databank of surface temperature observations taken globally at monthly, daily, and sub-daily resolutions. This holding provides users a way to better track the origin of data from its initial collection through the integration of a merged data holding. The consolidated dataset, developed by Mr. Rennie and based upon a robust probabilistic algorithm, contains more than 30,000 stations and will provide the foundation for future iterations of GHCN.
Mr. Rennie received both his Master of Science and Bachelor of Science degrees in Meteorology from Plymouth State University in Plymouth, New Hampshire. His master's thesis included evaluating and introducing techniques to nowcast microburst events over NASA’s Kennedy Space Center in Florida. Using an updated climatology of five minute averaged peak wind data, as well as local products from the WSR-88D, Mr Rennie developed advanced statistical techniques in hopes to increase detection of microburst occurrence, while lowering the amount of false alarms. As an undergraduate student, Mr. Rennie received the Ernest F. Hollings Scholarship and participated in a summer internship at the National Weather Service Forecast Office in Norman, Oklahoma. During his time there Mr. Rennie compared conventional radar products to newer technologies, including NSSL’s Phased Array Radar.
Hennon, C. C., K. R. Knapp, C. J. Schreck, III, S. E. Stevens, J. P. Kossin, P. W. Thorne, P. A. Hennon, M. C. Kruk, J. Rennie, J.-M. Gadéa, M. Striegl, and I. Carley, 2015: Cyclone Center: Can citizen scientists improve tropical cyclone intensity records? Bulletin of the American Meteorological Society, 96, 591-607. http://dx.doi.org/10.1175/BAMS-D-13-00152.1
Leeper, R. D., J. Rennie, and M. A. Palecki, 2015: Observational perspectives from U.S. Climate Reference Network (USCRN) and Cooperative Observer Program (COOP) Network: Temperature and precipitation comparison. Journal of Atmospheric and Oceanic Technology, 32, 703-721. http://dx.doi.org/10.1175/JTECH-D-14-00172.1
Schreck, C. J., III, S. Bennett, J. M. Cordeira, J. Crouch, J. Dissen, A. L. Lang, D. Margolin, A. O’Shay, J. Rennie, and M. J. Ventrice, 2015: Natural gas prices and the extreme winters of 2011/12 and 2013/14: Causes, indicators, and interactions. Bulletin of the American Meteorological Society, 96, S93-S96. http://dx.doi.org/10.1175/BAMS-D-13-00237.1
Rennie, J. J., J. H. Lawrimore, B. E. Gleason, P. W. Thorne, C. P. Morice, M. J. Menne, C. N. Williams, W. G. de Almeida, J. R. Christy, M. Flannery, M. Ishihara, K. Kamiguchi, A. M. G. Klein-Tank, A. Mhanda, D. H. Lister, V. Razuvaev, M. Renom, M. Rusticucci, J. Tandy, S. J. Worley, V. Venema, W. Angel, M. Brunet, B. Dattore, H. Diamond, M. A. Lazzara, F. Le Blancq, J. Luterbacher, H. Mächel, J. Revadekar, R. S. Vose, and X. Yin, 2014: The International Surface Temperature Initiative global land surface databank: Monthly temperature data release description and methods. Geoscience Data Journal, 1, 75-102. http://dx.doi.org/10.1002/gdj3.8
Lawrimore, J., J. Rennie, W. G. de Almeida, J. Christy, M. Flannery, B. Gleason, A. Klein-Tank, A. Mhanda, K. Ishihara, and D. Lister, 2013: The International Surface Temperature Initiative's global land surface databank. Temperature: Its Measurement and Control in Science and Industry, Volume 8: Proceedings of the Ninth International Temperature Symposium, AIP Publishing, 1036-1041 pp.
Lawrimore, J., J. Rennie, and P. Thorne, 2013: Responding to the need for better global temperature data. Eos, Transactions American Geophysical Union, 94, 61-62. http://dx.doi.org/10.1002/2013EO060002
Lawrimore, J. H., M. J. Menne, B. E. Gleason, C. N. Williams, D. B. Wuertz, R. S. Vose, and J. Rennie, 2011: An overview of the Global Historical Climatology Network monthly mean temperature data set, version 3. Journal of Geophysical Research: Atmospheres, 116, n/a-n/a. http://dx.doi.org/10.1029/2011JD016187
Rennie, J. J., 2010: Evaluation of WSR-88D methods to predict warm season convective wind events at Cape Canaveral Air Force Station and Kennedy Space Center. Masters Thesis., Dept. of Atmospheric Science and Chemistry, Plymouth State University, 134 pp.Rennie, J. J., J. P. Koermer, T. R. Boucher, and W. P. Roeder, 2010: Evaluation of WSR-88D methods to predict warm-season convective wind events at Cape Canaveral Air Force Station and Kennedy Space Center. 22nd Conference on Climate Variability and Change, Atlanta, GA, 103 pp.
Rennie, J. J., and K. Kunkel, 2016: Steps Towards an Experimental Homogenized Sub-Monthly Temperature Monitoring Tool. 22nd Conference on Applied Climatology, AMS Annual Meeting, New Orleans, LA, 14 Jan, 2016.
Schreck, C. J., III, J. Rennie, L. Watkins, K. Dobeck, and D. Podowitz, 2016: Scale-Dependent Relationships Between U.S. Temperatures and Teleconnections. Fourth Symposium on the Madden–Julian Oscillation, New Orleans, LA.
Leeper, D. R., and J. Rennie, 2015: The Evolution of In Situ Climate Observations and Impacts on Observations and Climate Metrics. UNC Asheville Department of Atmospheric Sciences, Asheville, NC, February 2015.
Rennie, J., A. Buddenberg, K. Gassert, R. Leeper, L. E. Stevens, and S. E. Stevens, 2015: Computation, Analysis and Visualization of In-Situ and Remote Sensing Data using Python. 95th AMS Annual Meeting, Phoenix, AZ, 5 January 2015.
Rennie, J. J., 2015: Computation, Analysis and Visualization of In-Situ and Remote Sensing Data using Python. 95 th Annual Meeting of the American Meteorological Society, Phoenix, AZ, 5 Jan 2015.
Rennie, J. J., 2015: Steps towards an experimental homogenized sub-monthly temperature monitoring tool. NCEI Branch Seminar, National Centers for Environmental Information, Asheville, NC, 28 Apr 2015.
Rennie, J. J., and K. Kunkel, 2015: Steps Towards an Experimental Homogenized Sub-Monthly Temperature Monitoring Tool. Poster, Fall Meeting of the American Geophysical Union, San Francisco, CA, 17 Dec, 2015.
Schreck, C. J., III, P. Thorne, C. C. Hennon, K. R. Knapp, S. E. Stevens, J. P. Kossin, J. Rennie, P. A. Hennon, and M. C. Kruk, 2015: Cyclone Center: Insights on historical tropical cyclones from citizen volunteers. 2015 AGU Fall Meeting, San Francisco, CA, 14 -18 December, 2015.
Hennon, C. C., K. R. Knapp, C. J. Schreck, S. E. Stevens, J. P. Kossin, P. W. Thorne, P. A. Hennon, M. C. Kruk, and J. Rennie, 2014: Toward a homogeneous global tropical cyclone intensity record. 31st Conf. on Hurricanes and Tropical Meteorology, San Diego, CA, 31 March-4 April, 2014.
Hennon, C. C., J. Rennie, C. J. Schreck, S. E. Stevens, P. A. Hennon, K. R. Knapp, J. P. Kossin, P. W. Thorne, and M. C. Kruk, 2014: Cyclone Center: Using citizen science to reconcile global tropical cyclone intensity. Eighth International Workshop on Tropical Cyclones (IWTC-VIII), Jeju, Republic of Korea, 2-10 December 2014.
Rennie, J., H.-M. Zhang, D. Wuertz, E. Nickl, P. V. Banzon, B. Gleason, B. Huang, J. H. Lawrimore, M. Menne, P. Thorne, and C. Williiams, 2014: A Data Gap Analysis and efforts towards improving NOAAs Global Surface Temperature. AGU Fall Meeting, Poster Presentation (GC51D-0448),, San Francisco, December 15-19, 2014.
Rennie, J. J., 2014: The ISTI Databank – Its construction, its formats, its metadata and its data characteristics. SAMSI IMAGe Summer Program: The International Surface Temperature Initiative, Boulder, CO, 8 July 2014.