Dr. Altug Aksoy
Hurricane Research Division-CIMAS
NOAA's Atlantic Oceanographic and Meteorological Laboratory
4301 Rickenbacker Causeway
Miami, FL 33149
Dr. Aksoy has scientific interests in data assimilation, numerical weather prediction, and ensemble methods, and especially in their application to tropical and mesoscale meteorology, as well as remote sensing platforms such as radars, lidars, and satellites. He is jointly appointed at Hurricane Research Division and University of Miami's Cooperative Institute for Marine and Atmospheric Studies since 2008. He earned his Ph.D. degree from Texas A&M University Department of Atmospheric Sciences in 2005.
Dr. Aksoy is a member of the data assimilation group and is the main developer of the Hurricane Ensemble Data Assimilation System (HEDAS). This is an advanced data assimilation system designed to assimilate hurricane inner-core observations at the vortex and smaller scales. Observation platforms that are commonly utlized for this purpose include the tail Doppler radar, dropwindsondes, Stepped Frequency Microwave Scatterometer (SFMR), and in-situ flight-level sensors installed on the NOAA P-3 and G-IV and Air Force Reserve C-130 aircraft. HEDAS is designed as a state-of-the-art system to carry out research on new data assimilation techniques and to investigate the potential impacts of new observing platforms for hurricane applications. It utilizes an ensemble Kalman filter and is interfaced with NOAA's HWRF model. Using HEDAS, Dr. Aksoy is currently actively carrying out research in parameter estimation, radar data assimilation, and satellite data assimilation.
Dr. Aksoy is also actively involved in serving the atmospheric science community through his editor role for Monthly Weather Review (MWR) published by the American Meteorological Society. MWR is one of the most popular scientific journals in the areas of numerical weather prediction and data assimilation.
Current Research Projects
- Aksoy, A. Parameter estimation. In Encylopedia of Atmospheric Sciences (2nd edition), G.R. North, J. Pyle, and F. Zhang (eds.). Academic Press, Volume 4, 181-186, doi:10.1016/B978-0-12-382225-3.00494-1 2014
- Aksoy, A., S.D. Aberson, T. Vukicevic, K.J. Sellwood, S. Lorsolo, and X. Zhang. Assimilation of high-resolution tropical cyclone observations with an ensemble Kalman filter using NOAA/AOML/HRD’s HEDAS: Evaluation of the 2008-2011 vortex-scale analyses. Monthly Weather Review, 141(6):1842-1865, doi:10.1175/MWR-D-12-00194.1 2013
- Aksoy, A., D.C. Dowell, and C. Snyder. A multicase comparative assessment of the ensemble Kalman filter for assimilation of radar observations, Part I: Storm-scale analyses. Monthly Weather Review, 137(6):1805-1824, doi:10.1175/2009MWR3086.1 2009
Recently Published Peer-Reviewed Papers
- Christophersen, H., A. Aksoy, P. Dunion, and K. Sellwood. The impact of NASA Global Hawk unmanned aircraft dropwindsonde observations on tropical cyclone track, intensity and structure: Case studies. Monthly Weather Review, 145(5):1817-1830, doi:10.1175/MWR-D-16-0332.1 2017
- Steward, J.L., A. Aksoy, and Z.S. Haddad. Parallel direct solution of the Ensemble Square-Root Kalman Filter equations with observation principal components. Journal of Atmospheric and Oceanic Technology, 34(9):1867-1884, doi:10.1175/JTECH-D-16-0140.1 2017
- Aberson, S.D., A. Aksoy, K.J. Sellwood, T. Vukicevic, and X. Zhang. Assimilation of high-resolution tropical cyclone observations with an ensemble Kalman filter using HEDAS: Evaluation of 2008-2011 HWRF forecasts. Monthly Weather Review, 143(2):511-523, doi:10.1175/MWR-D-14-00138.1 2015
- Aksoy, A., 2016: An Overview of the Tropical Cyclone Data Assimilation Activities at NOAA’s Hurricane Research Division. The 7th EnKF Data Assimilation Workshop, 23-27 May 2016, State College, Pennsylvania.
- Aksoy, A., J. Cione, H. Christophersen, and B. Dahl, 2016: Assessing the Value of the Coyote UAS Platform and Observations from the Perspective of Tropical Cyclone Data Assimilation and Prediction. The 32nd Conference on Hurricanes and Tropical Meteorology, April 2016, San Juan, Puerto Rico, American Meteorological Society.
- Aksoy, A., B. Klotz, J. Zhang, E. Uhlhorn, J. Cione, 2014: Model Sensitivity in Idealized, Ocean-Coupled Hurricane Simulations: Perturbations of Environment, Structure, and Model Physics Parameters. The 31st Conference on Hurricanes and Tropical Meteorology, April 2014, San Diego, California, American Meteorological Society.
Awards and Honors
|2012||Certificate of Recognition||U.S. Department of Commerce NOAA/AOML
|2011||Monthly Weather Review Editor’s Award||American Meteorological Society
|2011||Group Achievement Award to Genesis and Rapid Intensification Processes||NASA
|2011||Certificate of Recognition||U.S. Department of Commerce NOAA/AOML
|2003||College of Geosciences Graduate Excellence Scholarship||Texas A&M University
|2002||Mr./Mrs. Kenneth P. Pike Fellowship||Texas A&M University