Dual-Doppler lidar observation of horizontal convective rolls and near-surface streaks

Details Dual-Doppler lidar observation of horizontal convective rolls and near-surface streaks Dual-Doppler lidar observation of horizontal convective rolls and near-surface streaks

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3514808i&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 14, CiteID L14808

Physics

1

Atmospheric Processes: Boundary Layer Processes, Atmospheric Processes: Convective Processes, Atmospheric Processes: Remote Sensing

Scientific paper

Dual-Doppler lidar and heliborne sensors were used to investigate the three-dimensional (3D) structure of the wind field over Sendai Airport in June 2007. The 3D structures of several-hundred-meter-scale horizontal convective rolls (HCRs) in the sea-breeze layer were observed by the dual-Doppler lidar. The scale of the HCRs determined by the heliborne sensors roughly agreed with that determined by the dual-Doppler lidar. Analysis of the dual-Doppler lidar data showed that the region of upward flow in the HCRs originated in near-surface low-speed streaks. This structure is consistent with the results of large-eddy simulations of the atmospheric boundary layer. The aspect ratios of the HCRs were close to those predicted by linear theories.

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