Daniel Keyser

Daniel Keyser

Examines cyclones, fronts, jet streaks, and banded precipitation systems

The World Within Reach
Daniel Keyser
Professor
 

College of Arts and Sciences
Department: Atmospheric and Environmental Sciences

Address:

ES 224

Phone:
518-442-4559

 

Introduction

My research interests are in the area of synoptic-dynamic meteorology, which is concerned with applying principles and concepts from mathematics and physics to understanding atmospheric phenomena and processes spanning global to regional scales. Phenomenological and process studies on these scales have the potential of contributing to improvements in weather-forecasting skill not only through advances in understanding, but also through refinement of the numerical and conceptual models used in weather-forecasting practice. In conducting these studies, I have attempted to bridge the perennial gap between theory and observation through the application of dynamical models and diagnostics to selected types of weather systems, such as extratropical and tropical cyclones, fronts, jet streaks, coherent tropopause disturbances, banded precipitation systems, and inertia-gravity waves. Current research projects include:

  1. collaborative research with the National Weather Service on the development of improved diagnostics, numerical models, and situational awareness of high-impact cyclones and convective weather events;
  2. investigation of lower-tropospheric meteorological processes that impact the evolution of wildland fires;
  3. investigation of the skill of week two extreme temperature and precipitation forecasts at the NCEP-WPC; and
  4. phenomenological studies of cool-season extreme weather events over central and eastern North America on intraseasonal time scales.

Education

B.S., Meteorology, The Pennsylvania State University, 1975.

M.S., Meteorology, The Pennsylvania State University, 1977.

Ph.D., Meteorology, The Pennsylvania State University, 1981.

Research Interests

Synoptic-dynamic and mesoscale meteorology; phenomenological and process studies conducted through the application of dynamical models and diagnostics to selected types of weather systems, such as extratropical and tropical cyclones, fronts, jet streaks, coherent tropopause disturbances, banded precipitation systems, and inertia-gravity waves.

Publications

Cunningham, P., and D. Keyser, 2004: Dynamics of jet streaks in a stratified quasi-geostrophic atmosphere: Steady-state representations. Quart. J. Roy. Meteor. Soc., 130, 1579-1609.

Pyle, M. E., D. Keyser, and L. F. Bosart, 2004: A diagnostic study of jet streaks: Kinematic signatures and relationship to coherent tropopause disturbances. Mon. Wea. Rev., 132, 297-319.

Novak, D. R., L. F. Bosart, D. Keyser, and J. S. Waldstreicher, 2004: An observational study of cold season-banded precipitation in northeast U.S. cyclones. Wea. Forecasting, 19, 993-1010.

Novak, D. R., J. S. Waldstreicher, D. Keyser, and L. F. Bosart, 2006: A forecast strategy for anticipating cold season mesoscale band formation within eastern U.S. cyclones. Wea. Forecasting, 21, 3-23.

Archambault, H. M., L. F. Bosart, D. Keyser, and A. R. Aiyyer, 2008: Influence of large-scale flow regimes on cool-season precipitation in the northeastern United States. Mon. Wea. Rev., 136, 2945-2963.

Archambault, H. M., D. Keyser, and L. F. Bosart, 2010: Relationships between large-scale regime transitions and major cool-season precipitation events in the northeastern United States. Mon. Wea. Rev., 138, 3454-3473.

Charney, J. J., and D. Keyser, 2010: Mesoscale model simulation of the meteorological conditions during the 2 June 2002 Double Trouble State Park wildfire. Int. J. Wildland Fire, 19, 427-448.

Moore, B. J., L. F. Bosart, D. Keyser, and M. L. Jurewicz, 2013: Synoptic-scale environments of predecessor rain events occurring east of the Rocky Mountains in association with Atlantic basin tropical cyclones. Mon. Wea. Rev., 141, 1022-1047.

Archambault, H. M., L. F. Bosart, D. Keyser, and J. M. Cordeira, 2013: A climatological analysis of the extratropical flow response to recurving western North Pacific tropical cyclones. Mon. Wea. Rev., 141, 2325-2346.

Archambault, H. M., D. Keyser, L. F. Bosart, C. A. Davis, and J. M. Cordeira, 2015: A composite perspective of the extratropical flow response to recurving western North Pacific tropical cyclones. Mon. Wea. Rev., 143, 1122-1141.

Sinclair, V. A., and D. Keyser, 2015: Force balances and dynamical regimes of numerically simulated cold fronts within the boundary layer. Quart. J. Roy. Meteor. Soc., 141, 2148-2164.

Bentley, A. M., D. Keyser, and L. F. Bosart, 2016: A dynamically based climatology of subtropical cyclones that undergo tropical transition in the North Atlantic basin. Mon. Wea. Rev., 144, 2049-2068.

Bentley, A. M., L. F. Bosart, and D. Keyser, 2017: Upper-tropospheric precursors to the formation of subtropical cyclones that undergo tropical transition in the North Atlantic Basin. Mon. Wea, Rev., 145, 503-520.