Jonathan Vigh, Ph.D.

  • About
  • Projects
  • Funding
  • Publications
  • Presentations
  • Products
  • Outreach
  • News
Jonathan Vigh

Project Scientist I
Joint Numerical Testbed
Phone: 303-497-8205
Email: jvigh@ucar.edu

Current Projects

Past Projects

To learn more about these projects, please go to Projects.

Current Job Duties

Jonathan is currently funded full-time on a number of projects that involve tropical cyclones, building hurricane datasets for wind risk applications, the evaluation and applications of regional downscaled climate model data, and building the Climate Risk Management Engine.

Professional Interests

Jonathan Vigh's main research interests include hurricanes and tropical meteorology. Recently, he has studied the problem of eye formation in hurricanes and other geophysical vortices to learn how the eye/eyewall structure impacts the subsequent intensification of the storm. He has also done extensive work to construct several new aircraft-based data sets to further investigate structure and intensity changes in tropical cyclones, with a particular focus on the radius of maximum winds (RMW).

In his spare time, Jonathan works with various collaborators to better understand the factors that control RMW in tropical cyclones. Another collaboration seeks to understand the relationship between RMW contraction and intensification during the storm's primary intensification phase. Eventually, he hopes to find time and funding to work to understand what sets the maximum possible intensification rate of a tropical cyclone.

Education

  • 2000 B.S., Meteorology, Pennsylvania State University, State College, PA
  • 2004 M.S., Atmospheric Science, Colorado State University, Fort Collins, CO
  • 2010 Ph.D. Atmospheric Science, Colorado State University, Fort Collins, CO

Recent Publications

  • Guentchev, G. S., R. B. Rood, C. M. Ammann, J. J. Barsugli, K. Ebi, V. Berrocal, M. S. O'Neil, C. J. Gronlund, J. L. Vigh, B. Koziol, L. Cinquini, 2016: Evaluating the appropriateness of downscaled climate information for projecting risks of Salmonella. Int. J. Environ. Res. Public Health, 13, 267, doi:10.3390/ijerph13030267. (pdf file)
  • Stern, D. P., J. Vigh, D. Nolan, and F. Zhang, 2015: Revisiting the relationship between eyewall contraction and intensification. J. Atmos. Sci., 72, 1283-1306, doi:10.1175/JAS-D-14-0261.1. (pdf file)
  • Frisius, T., D. Schönemann, and J. Vigh, 2013: The impact of gradient wind imbalance on potential intensity of tropical cyclones in an unbalanced slab boundary layer model. J. Atmos. Sci., 70, 1874-1890, doi:10.1175/jas-d-12-0160.1. (pdf file)
  • Musgrave, K. D., R. K. Taft, J. L. Vigh, B. D. McNoldy, and W. H. Schubert, 2012: Time evolution of the intensity and size of tropical cyclones. J. Adv. Model. Earth Syst., 4, M08001, 15 pp., doi:10.1029/2011M5000104. (pdf file)
  • Vigh, J. L., J. A. Knaff, and W. H. Schubert, 2012: A climatology of hurricane eye formation. Mon. Wea. Rev., 140, 1405-1426, doi:10.1175/MWR-D-11-00108.1.* (pdf file of article, pdf of supplement)

Recent Products

  • Vigh, J. L., 2015: VDM+: The Enhanced Vortex Data Message Dataset (Version 1.100). Tropical Cyclone Data Project, National Center for Atmospheric Research, Research Applications Laboratory, Boulder, Colorado. [Available online at: http://dx.doi.org/10.5065/D61Z42GH.]
  • Chavas, D. R. and J. L. Vigh, 2015: QSCAT-R: The QuikSCAT Tropical Cyclone Radial Structure Dataset (Version 1.0). Tropical Cyclone Data Project, National Center for Atmospheric Research, Research Applications Laboratory, Boulder, Colorado. [Available online at: http://dx.doi.org/10.5065/D65B00J3.]
  • Vigh, J. L., N. M. Dorst, C. L. Williams, E. W. Uhlhorn, B. W. Klotz, J. Martinez, H. E. Willoughby, F. D. Marks, Jr., D. R. Chavas, 2016: FLIGHT+: The Extended Flight Level Dataset for Tropical Cyclones (Version 1.1). Tropical Cyclone Data Project, National Center for Atmospheric Research, Research Applications Laboratory, Boulder, Colorado. [Available online at: http://dx.doi.org/10.5065/D6WS8R93.]

 

Projects and Research

Current Projects

Past Projects

Current Projects

Development of an HWRF diagnostics module to evaluate intensity and structure using synthetic flight paths through tropical cyclones

This funded work involves implementing synthetic flight profiles in the Hurricane WRF (HWRF) model by taking aircraft flight paths from real storms, transforming these flight paths into a frame relative to the moving center of HWRF's simulated storm, and then comparing the resulting synthetic wind profiles to the observed wind structure from the real storm. By doing this, an "apples-to-apples" comparison can be made between the wind structures of the simulated and real storms. This advanced diagnostics activity should lead to insight on how to improve HWRF's structure and intensity predictions. Jonathan is the Principal Investigator and main developer in this project. Collaborating institutions include the Development Testbed Center, the NOAA Hurricane Research Division, and the NOAA Environmental Modeling Center.

This work is funded by the DTC Visitor Program.

National Climate Predictions & Projections Platform (NCPP)

Overview

NCPP is a large multi-agency project whose goal is to advance the provision of regional and local information about the evolving climate and to accelerate its use in adaptation planning and decision making. The NCPP team includes members from NOAA, NCAR, the University of Colorado, the University of Michigan, and other institutions.

I have been working in a support role under Caspar Ammann (NCAR PI) since May 2013. My contribution thus far has been the creation of an evaluation engine to compute various metrics and indices across a large set of downscaled regional climate data sets.

Technical Details

To build the evaluation engine, I created a 20,000+ line code system in NCAR Command Language (NCL). Using a highly efficient and integrated workflow, this code set: (a) restructures each of the downscaled data sets over the monthly, seasonal, and annual timescales; (b) computes base statistics for a variety of metrics and indices; (c) computes climatological period statistics; (d) and finally, generates a unique evaluation plot for each metric or index combination for the designated period time frame, along with an associated self-contained NetCDF data file and XML metadata file. Metrics computed include the mean, median, standard deviation, 5th, 10th, 25th, 75th, 90th, and 95th percentiles. Various groups of indices are also computed including the ETCCDI climate extremes indices, the BioClim indices, and additional health-related indices. Comparison datasets are also generated to allow users to compare the various downscaled regional climate model data to several observational standards, which include the Maurer BCCA dataset and the Daymet 2.1 dataset. Altogether, 159,000 plots datasets have been created.

Project website: National Climate Predictions & Projections Platform (NCPP)

View evaluation and comparison data on the NCPP data portal:  https://earthsystemcog.org/search/ncpp/

 

An Improved Historical Database for Tropical Cyclone Wind Risk Modeling

This project seeks to develop a new historical database of tropical cyclone wind and size parameters. Unlike other historical databases, such as the National Hurricane Center's Hurricane Database (HURDAT2), this new database will use objective methods to provide time-dependent error bounds on the estimated wind parameters. The goal is to provide the highest quality database possible for parametric wind modeling applications. Such models are used by the (re)insurance industry to simulate wind risk from tropical cyclones.

As the project PI, I am working to build several source datasets, including the Enhanced Vortex Data Message Dataset (VDM+) and the Extended Flight Level Dataset. Another project team member, Daniel Chavas, is updating his TC QuikSCAT Dataset of outer wind parameters. From these three datasets, the project team will build the new historical database with time-dependent uncertainty bounds. We will also devise new metrics for structure and intensity and examine how well these predict historic landfall losses.

This project is funded by the Risk Prediction Initiative (RPI2.0).

Project website: http://verif.rap.ucar.edu/tcdata/

 

USDA Agriculture Project

I began working on this NCAR-led project in Fall 2013 under the leadership of Caspar Ammann. I am working on implementing the computation of return periods and other ensemble and extreme value analysis techniques to examine the effects of changing climate on agriculture and food security.

 

Tropical Cyclone Guidance Project

I initiated this project in 2011 to provide a global platform for the real-time collection and dissemination of tropical cyclone guidance aids. Used by forecasters and non-specialists alike, this site provides clear and easy-to-read plots of the track and intensity forecasts of the various global and regional hurricane models and other forecast aids. In the future, the site will also serve as a platform for the exchange and display of aircraft-based structure information and other types of data.

Project website: http://www.ral.ucar.edu/hurricanes/

 

Past Projects

Large-scale Diagnostics of the Basin-scale HWRF Model

Overview

In August 2012, I wrapped up an 8-month diagnostics effort for the DTC's Hurricane Task. He started this task by making an integrative assessment of known and perceived problems with the HWRF model. Then he formulated a menu of possible diagnostics approaches. With input from NCEP's Environmental Modeling Center (EMC), the top-priority task was selected to examine the climatology of large-scale errors in the basin-scale HWRF model (bHWRF). By comparing retrospective bHWRF forecasts against 0-hr forecast fields from retrospective runs of the Global Forecast System (GFS) model, a grid-point climatology of the spatial structure of errors and biases was constructed. Numerous systematic biases have been discovered, leading to recommendations for ways to improve the bHWRF.

Technical Details

Jonathan crafted a 17,000 line integrated code system in NCAR Command Language (NCL) to accomplish this task. This set of NCL scripts manages the workflow of staging the model data sets from the mass stores on Jet, Zeus, and Bluefire, transferring data onto disk on Zeus, subsetting and interpolating model data onto a common grid, converting to compressed netCDF4, computing paired differences of numerous 3D variables at each grid-point, accumulating these model errors for each month and the entire season, and creating output plots for evaluation and analysis. This tera-scale data analysis effort has been implemented on the NESCC Zeus Supercomputer using parallel batch processing allowing for high rates of throughput. Altogether, approximately 60 TB of data have been processed, resulting in over 5000 plots of the mean error (bias), RMS error, and de-biased RMS error.

 

Current Research Areas

Formation of the hurricane eye

Fundamental controls of the radius of maximum wind

Relationship between intensification and contraction during the primary intensification phase

Past Research Areas

Kilo-ensemble forecasting of Atlantic tropical cyclones

Current Funding Sources

Development of an HWRF diagnostics module to evaluate intensity and structure using synthetic flight paths through tropical cyclones

  • Role: Principal Investigator
  • Amount: $35,929
  • Date of award: 17 Jul 2012
  • Performance period: 1 Aug 2012 – 31 Jul 2013

Development of an Improved Database of Tropical Cyclone Size Parameters

  • Role: Principal Investigator
  • Amount: $79,964
  • Date of award: ~15 Jul 2013
  • Performance period: 1 Oct 2013 – 31 Dec 2015
  • Project website: http://verif.rap.ucar.edu/tcdata/

 

Peer-Reviewed Papers

  • Guentchev, G. S., R. B. Rood, C. M. Ammann, J. J. Barsugli, K. Ebi, V. Berrocal, M. S. O'Neil, C. J. Gronlund, J. L. Vigh, B. Koziol, L. Cinquini, 2016: Evaluating the appropriateness of downscaled climate information for projecting risks of Salmonella. Int. J. Environ. Res. Public Health, 13, 267, doi:10.3390/ijerph13030267. (pdf file)
  • Stern, D. P., J. Vigh, D. Nolan, and F. Zhang, 2015: Revisiting the relationship between eyewall contraction and intensification. J. Atmos. Sci., 72, 1283-1306, doi:10.1175/JAS-D-14-0261.1. (pdf file)
  • Frisius, T., D. Schönemann, and J. Vigh, 2013: The impact of gradient wind imbalance on potential intensity of tropical cyclones in an unbalanced slab boundary layer model. J. Atmos. Sci., 70, 1874-1890, doi:10.1175/jas-d-12-0160.1. (pdf file)
  • Musgrave, K. D., R. K. Taft, J. L. Vigh, B. D. McNoldy, and W. H. Schubert, 2012: Time evolution of the intensity and size of tropical cyclones. J. Adv. Model. Earth Syst., 4, M08001, 15 pp., doi:10.1029/2011M5000104. (pdf file)
  • Vigh, J. L., J. A. Knaff, and W. H. Schubert, 2012: A climatology of hurricane eye formation. Mon. Wea. Rev., 140, 1405-1426, doi:10.1175/MWR-D-11-00108.1.* (pdf file of article, pdf of supplement)
  • Vigh, J. L. and W. H. Schubert, 2009: Rapid development of the tropical cyclone warm core. J. Atmos. Sci., 66, 3335-3350, doi:10.1175/2009JAS3092.1.* (pdf file)
  • Schubert,W. H., C.M. Rozoff, J. L. Vigh, B. D. McNoldy, and J. P. Kossin, 2007: On the distribution of subsidence in the hurricane eye. Quart. J. Roy. Meteor. Soc., 133, 595-605, doi:10.1002/qj.49. (pdf file)
  • Vigh, J., S. R. Fulton, M. DeMaria, and W. H. Schubert, 2003: Evaluation of a multigrid barotropic tropical cyclone track model. Mon. Wea. Rev., 131, 1629-1636.* (pdf file)

Work in progress

  • Vigh, J. L., J. A. Knaff, and W. H. Schubert, 2014: Observations of hurricane eye formation: Intensity changes and the role of the environment. Mon. Wea. Rev., in preparation.
  • Vigh, J. L., J. A. Knaff, and W. H. Schubert, 2014: Observations of hurricane eye formation: Dynamic and thermodynamic structure. Mon. Wea. Rev., in preparation.
  • Vigh, J. L.,W. H. Schubert, and G. Holland, 2014: A review of eye formation in tropical cyclones and other geophysical vortices. Quart. J. Roy. Meteor. Soc., in preparation.
* Please note that the AMS Copyright Notice applies to the articles that have been published in any of the American Meteorological Society (AMS) publication. Permission to place a copy of these works on this server has been provided by the American Meteorological Society. The AMS does not guarantee that the copy provided here is an accurate copy of the published work.

Other Non-Peer Reviewed Works

  • Thesis and Dissertation
    • Vigh, J. L., 2010a: Formation of the hurricane eye. Ph.D. dissertation, Dept. of Atmospheric Science, Colorado State University, Fort Collins, Colorado, 80523, 538 pp. [Available in the official graduate school format (best for printing) or a single-spaced format with hyperlinks (best for viewing onscreen)].
    • Vigh, J. L., 2004: Forecasting of Atlantic Tropical Cyclones Using a Kilo-Member Ensemble. M.S. thesis (pdf file), Dept. of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80523, 174 pp.
  • Workshop Proceedings
    • Elizabeth A. Ritchie, Mai Nguyen, Peter Otto, Greg Tripoli, Jonathan Vigh, 2010: Inner core impacts. Subtopic 1.2. Tropical Cyclone Structure and Intensity Change. Report for the Seventh International Workshop on Tropical Cyclones (pdf file), World Meteorological Organization, La Réunion, France.
  • Non-peer reviewed journal contributions (e.g. solicited pieces, meeting summaries, or essays):
    • Vigh, J., 2006: Hurricane eye formation remains unexplained. Bull. Amer. Meteor. Soc., 87, 1314-1315 (solicited piece for meeting summary).
  • SOARS Summer Research Reports
    • Vigh. J., 2000. A fuzzy logic system for predicting hurricane intensity in the eastern North Pacific. Unpublished manuscript (pdf file). Science research mentor: Kevin Petty.
    • Vigh, J., 1999. Diagnosing sources of error in the cloud parameterizations of the NCAR Climate Community Model. Unpublished manuscript (pdf file - doesn't include figures). Science research mentor: Joel Norris.
  • Class papers and presentations
    • Vigh, J., 2005: Downslope windstorms and rotors: Class presentation (pdf file) for Atmospheric Waves and vortices (AT 707, Dr. Michael Montgomery), Department of Atmospheric Science, Colorado State University.
    • Vigh, J., 2003: Costs of greenhouse gas mitigation: A Brief Overview. Class presentation (ppt file) for Global Carbon Cycle (AT 760, Dr. Scott Dennig), Department of Atmospheric Science, Colorado State University.
    • Vigh, J., 2001: Mechanisms by which the atmosphere adjusts to an extremely large explosive event. Class paper (pdf file) for Mesoscale Meteorology (AT 735, Dr. Richard Johnson), Department of Atmospheric Science, Colorado State University. 
  • NCAR Fellows Newsletter, Feature Articles
    • April 2011: "SOARS and ASP: Coming Full Circle" (pdf file)
    • January 2011: "Predicting tropical cyclones: Meeting summary of the Seventh International Workshop on Tropical Cyclones (IWTC-VII), La Réunion, France, 2010" (pdf file)

Conference Papers, Posters, and Presentations

  • Vigh, J. L., E. Gilleland, C. L. Williams, D. R. Chavas, N. M. Dorst, J. Done, G. Holland, and B. G. Brown: 2016: A New Historical Database of Tropical Cyclone Position, Intensity, and Size Parameters Optimized for Wind Risk Modeling. Extended Abstract (pdf file), 32nd Conf. on Hurricanes and Tropical Meteorology, San Juan, Puerto Rico, Amer. Meteor. Soc., Paper 12C.2, doi:10.13140/RG.2.1.3720.5361. [Recorded presentation given 20 April 2016; pdf of presentation].
  • Vigh, J. L., C. Kieu, V. Tallapragada, L. R. Bernardet, and E. W. Uhlhorn, 2014: Use of Synthetic Profiles to Diagnose Simulated Tropical Cyclones in Regional Hurricane Models. Extended Abstract (pdf file), 31st Conf. on Hurricanes and Tropical Meteorology, San Diego, CA, Amer. Meteor. Soc., Paper 16D.6. [Recorded presentation given  04 May 2014].
  • Vigh, J. L., C. M. Ammann, R. B. Rood, J. J. Barsugli, G. Guentchev, 2013: A Computationally Efficient Platform To Examine the Efficacy of Regional Downscaling Methods. Abstract, 2013 Fall Meeting, San Francisco, CA, Amer. Geophys. Union, Abstract GC12C-04. [Presented by Jonathan Vigh 09 December 2013 (pptx file, abstract text)].
  • Vigh, J. L., P. Johnsen, M. Straka, T. Galarneau, E. Uhlhorn, A. Norton, N. M. Dorst, F. Marks, Jr., and M. Shapiro, 2013: Evaluation of the Simulated Structure of Hurricane Sandy Using Synthetic Flight Paths, Abstract, 16th Cyclone Workshop, Sainte-Adèle, Quebec, Canada. [Presented by Jonathan Vigh 23 Sep 2013 (pptx file - 550 MB, abstract text)].
  • Vigh, J. L. and C. M. Rozoff, 2012: Impact of inner core tropical cyclone structure on the potential for rapid intensification. Extended Abstract (pdf file), 30th Conf. on Hurricanes and Tropical Meteorology, Ponte Vedra Beach, FL, Amer. Meteor. Soc., Paper 8B.2. [Recorded presentation given 18 April 2012]
  • Stern, D., J. L. Vigh, D. S. Nolan, and F. Zhang, 2012: Revisiting the Relationship Between Eyewall Contraction and Intensification. Poster (pdf file), 30th Conf. on Hurricanes and Tropical Meteorology, Ponte Vedra Beach, FL, Amer. Meteor. Soc., Paper 2.51. [Poster presented by Daniel Stern 18 April 2012].
  • Frisius, T., D. Schönemann, and J. L. Vigh, 2012: The impact of gradient wind imbalance on potential intensity of tropical cyclones. Poster (pdf file), 30th Conf. on Hurricanes and Tropical Meteorology, Ponte Vedra Beach, FL, Amer. Meteor. Soc., Paper 2.51. [Poster presented by Jonathan Vigh 18 April 2012].
  • Holland, G. J. and J. L. Vigh, 2011: Targeting as a mode of science communication: principles, issues, and a practical example. Poster, AGU Fall Meeting, San Francisco, CA, Amer. Geophys. Union., Abstract ED33B-0786. [Poster presented by Greg Holland 07 Dec 2011]
  • Vigh, J. L., 2010: Structure and intensity changes during hurricane eye formation. Extended Abstract (pdf file), 29th Conf. on Hurricanes and Tropical Meteorology, Tucson, AZ, Amer. Meteor. Soc., Paper 8B.1. [Recorded presentation given 12 May 2010]
  • Vigh, J. L. and W. H. Schubert, 2008: The role of inertial stability in the rapid development of the tropical cyclone warm core. Extended Abstract (pdf file), 28th Conf. on Hurricanes and Tropical Meteorology, Orlando, FL, Amer. Meteor. Soc., Paper 17C.1. [Recorded presentation given 2 May 2008]
  • Vigh, J., 2006: Formation of the hurricane eye. Extended Abstract (pdf file), 27th Conf. on Hurricanes and Tropical Meteorology, Monterey, CA, Amer. Meteor. Soc., Paper 1B.6. [Recorded presentation given 24 Apr 2006]
  • Vigh, J., 2004: Evaluation of a kilo-member ensemble for track forecasting. Preprints (pdf file), 26th Conf. on Hurricanes and Tropical Meteorology, Miami, FL, Amer. Meteor. Soc., 160-161. [Recorded presentation given 5 May 2004]
  • Vigh, J., 2002: Track forecasting of 2001 Atlantic tropical cyclones using a kilo-member ensemble. Preprints (pdf file), 25th Conf. on Hurricanes and Tropical Meteorology, San Diego, CA, Amer. Meteor. Soc., 212-213. [ppt file for presentation given 30 Apr 2002]

Seminars

  • 20 Feb 2014: Tropical Cyclone Eye Formation: Observations of Structure and Intensity Change. Department of Atmospheric Sciences, National Taiwan University, Taiwan. [ppt file]
  • 22 Jun 2011: Hurricane eye formation: observations of structure and intensity change. Meteorologisches Institut, Universität Hamburg, Germany. [ppt file]
  • 29 Jan 2010: Formation of the hurricane eye. Doctoral Defense, Colorado State University, Fort Collins, CO. [ppt file]
  • 16 Apr 2004: Forecasting of Atlantic tropical cyclones using a kilo-member ensemble. Masters Defense, Colorado State University, Fort Collins, CO. [ppt file]

Other Presentations

  • 20 Feb 2014: Atmospheric Adjustment Mechanisms and the Rapid Development of the Tropical Cyclone Warm Core. Class Lecture, Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan.
  • 08 Jan 2014: Steps Toward an Improved Database for Tropical Cyclone Wind Risk Modeling. Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Boulder, CO. [pptx file]
  • 12 Oct 2013: An Improved Historical Database for Tropical Cyclone Wind Risk Modeling. Risk Prediction Initiative Research Update Workshop, Hamilton, Bermuda. 
  • 16 May 2013: Progress Toward the Extended Flight Level Dataset. Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Fort Collins, CO. [pptx file]
  • 16 Aug 2012: Diagnosing Spatial Bias Structure in the Basin-Scale HWRF Model. Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Boulder, CO. [pptx file]
  • 16 Nov 2011: How often does eye formation coincide with rapid intensification? Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Fort Collins, CO. [ppt file]
  • 01 Apr 2011: A climatology of hurricane eye formation. Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Boulder, CO. [ppt file]
  • 07 Oct 2010: Intensification and contraction: do they always go together? Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Fort Collins, CO. [ppt file
  • 10 Feb 2010: Observations of hurricane eye formation. Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Boulder, CO. [ppt file]
  • 26 Aug 2009: Eye formation and warm rings. Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Fort Collins, CO. [ppt file]
  • 29 Feb 2009: Towards a comprehensive structure and intensity dataset. Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Boulder, CO. [ppt file]
  • 26 Aug 2008: An extended flight level dataset, Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Fort Collins, CO. [ppt file]
  • 16 Jan 2008: Rapid development of the tropical cyclone warm core, Joint CSU/NOAA/NCAR Hurricane Workshop on Tropical Cyclones, Boulder, CO. [ppt file]
  • 19 Feb 2000: Bridging Two Worlds: Native American Students in Science Benefit from Traditional Knowledge, Values, and Practice. Native American Studies Annual Meeting. Panel presentation co-presented with Thomas Windham, Houston, TX.
  • 7 Aug 2000: A Fuzzy Logic System for Predicting Hurricane Intensity in the Eastern North Pacific. SOARS Colloquium, Boulder, CO. Science research mentor: Kevin Petty.
  • Aug 1999: Diagnosing Sources of Error in the Cloud Parameterizations of the NCAR Climate Community Model. SOARS Colloquium, Boulder, CO. Science research mentor: Joel Norris.

Datasets and Products

I have developed several extensive research-grade datasets based on aircraft observations in tropical cyclones. Additionally, I collaborated on another dataset involving satellite-based scatterometry. Please follow the links in the citations below, or visit the Tropical Cyclone Data Project, to learn more about these datasets and download the data.

The Enhanced Vortex Data Message Dataset (VDM+)

   Vigh, J. L., 2015: VDM+: The Enhanced Vortex Data Message Dataset (Version 1.100). Tropical Cyclone Data 
             Project, National Center for Atmospheric Research, Research Applications Laboratory, Boulder, Colorado. 
             [Available online at: http://dx.doi.org/10.5065/D61Z42GH.] Accessed* dd mmm yyyy.

where * dd mmm yyyy is the date which you last accessed the dataset (e.g., 23 Nov 2015).


The QuikSCAT Tropical Cyclone Radial Structure Dataset (QSCAT-R)

   Chavas, D. R. and J. L. Vigh, 2015: QSCAT-R: The QuikSCAT Tropical Cyclone Radial Structure Dataset (Version 1.0). 
             Tropical Cyclone Data Project, National Center for Atmospheric Research, Research Applications Laboratory, 
             Boulder, Colorado. [Available online at: http://dx.doi.org/10.5065/D65B00J3.] Accessed* dd mmm yyyy.

where * dd mmm yyyy is the date which you last accessed the dataset (e.g., 23 Dec 2015).


The Extended Flight Level Dataset for Tropical Cyclones (FLIGHT+)

   Vigh, J. L., N. M. Dorst, C. L. Williams, E. W. Uhlhorn, B. W. Klotz, J. Martinez, H. E. Willoughby, 
             F. D. Marks, Jr., D. R. Chavas, 2016: FLIGHT+: The Extended Flight Level Dataset for Tropical Cyclones 
             (Version 1.1). Tropical Cyclone Data Project, National Center for Atmospheric Research, Research 
             Applications Laboratory, Boulder, Colorado. 
             [Available online at: http://dx.doi.org/10.5065/D6WS8R93.] Accessed* dd mmm yyyy.

where * dd mmm yyyy is the date which you last accessed the dataset (e.g., 20 Apr 2016).

Real-time Products

I also maintain and develop the Tropical Cyclone Guidance Project (TCGP), a real-time web site which aggregates and visualizes model guidance for tropical cyclones around the world. This site is unique in that it attempts to aggregate all publicly-available tropical guidance guidance from numerical weather prediction centers arond the word, as well as experimental prediction aids being developed researchers. The site includes a real-time data feed in the Automated Tropical Cyclone Format (ATCF), as well as extensive documentation.

Climate Products

I am also the developer for the Climate Risk Management engine (CRMe), a high efficient and extensible platform for processing climate data into application-oriented indicators. To view the thousands of output datasets that are generated, I developed the CRMe Viewer, a Javascript- and jQuery-based tool for rapidly browsing the extensive CRMe data collection. For more about CRMe, please visit the CRMe web site.

Mentoring and Outreach

I have had the opportunity of mentoring a number of great students in various capacities, including through the Significant Opportunities in Atmospheric Research and Science (SOARS) Program, through the Advanced Study Program Graduate Visitor Program, and through serving on the thesis committees of Masters students from the University of the South Pacific.

  • Diamilet Betancourt, SOARS Program, 2010, served as a scientific co-mentor (together with Dr. Shuyi Chen, Univ. of Miami)
  • Daria Schönemann (Univ. of Hamburg, Germany), ASP Graduate Visitor Program, 2011, collaborated with Daria and her advisor, Dr. Thomas Frisius (Univ. of Hamburg, Germany)
  • Alick Haruhiru (University of the South Pacific), served on his Masters thesis committee and co-supervised him during a 9-month visit to NCAR
  • Jonathan Martinez, SOARS Program, 2013, served as a scientific co-mentor (together with Dr. Michael Bell, Univ. of Hawaii)
  • Jimmy Gomogo (Papua New Guinea, University of the South Pacific), 2016, currently serving on his Masters thesis committee (together with Dr. Mrinal Biswas, NCAR/RAL/JNTP)

Outreach

I occasionally receive questions from students working on class projects. These students have ranged from 5th grade all the way through high school. If the question is within my area of expertise, I try to provide helpful and in-depth answers. I am also available to talk with students who are contemplating careers in atmospheric science.

News