University of Reading: Robin Hogan, Bob Plant, Thorwald Stein, Kirsty Hanley, John Nicol Met Office: Humphrey Lean, Carol Halliwell. DYMECS: Dynamical and Microphysical Evolution of Convective Storms (NERC Standard Grant). The DYMECS approach: beyond case studies.
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University of Reading: Robin Hogan, Bob Plant, Thorwald Stein, Kirsty Hanley, John Nicol
Met Office: Humphrey Lean, Carol HalliwellDYMECS: Dynamical and Microphysical Evolution of Convective Storms(NERC Standard Grant)
Track storms in real time and automatically scan Chilbolton radar
Derive properties of hundreds of storms on ~40 days:
NIMROD radar network rainfall
Evaluate these properties in model varying:
Smagorinsky mixing length plays a key role in determining number of small stormsStorm size distribution
500-m model best
200-m model best
1.5-km model best
200-m model best
Observations 1.5-km model 1.5-km + graupelVertical profile
Ice density too low?
Higher reflectivity core
Observations 200-m model 500-m modelVertical profile
Key uncertainty in models is convective updraft intensity and spatial scale
Can we estimate updrafts from Doppler wind sufficiently well to characterize the distribution of intensity and spatial scale?
Vertical wind (m/s)
Retrieved vertical wind (m/s)
Horizontal wind (m/s)
Retrieval error (m/s)
12:45 07 August 2011
16:37 07 August 2011