Abstract
Tropical storm Nate, which was a powerful hurricane prior to landfall
along the US Gulf coast, traversed north and weakened considerably to a
tropical depression as it moved near an instrumented site in Hunstville,
AL. The outer rain bands lasted 18 h (03:00 to 21:00 UTC on 08 October
2017) and a 2D-video disdrometer (2DVD) captured the event which was
shallow at times and indicative of pure warm rain processes. The 2DVD
measurements are used for 3D reconstruction of drop shapes (including
the rotationally asymmetric drops) and the drop-by-drop scattering
matrix has been computed using Computer Simulation Technology integral
equation solver for drop sizes >2.5 mm. From the scattering matrix
elements, the polarimetric radar observables are simulated by
integrating over 1 min consecutive segments of the event. These
simulated values are compared with dual-polarized C-band radar data
located at 15 km range from the 2DVD site to evaluate the contribution
of the asymmetric drop shapes, specifically to differential
reflectivity. The drop fall velocities and drop horizontal velocities in
terms of magnitude and direction, all being derived from each drop
image from two orthogonal cameras of the 2DVD, are also considered.
Originalsprache | englisch |
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Aufsatznummer | 114 |
Seitenumfang | 14 |
Fachzeitschrift | Atmosphere |
Jahrgang | 11 |
Ausgabenummer | 1 |
DOIs | |
Publikationsstatus | Veröffentlicht - 18 Jan. 2020 |
Fields of Expertise
- Information, Communication & Computing