Journal article

A doppler radar study of convective draft lengths over darwin, australia

NKH YEUNG, SC SHERWOOD, A PROTAT, TP LANE, C WILLIAMS

Monthly Weather Review | American Meteorological Society | Published : 2021

Abstract

Data from an upward-pointing wind profiler radar pair at Darwin in tropical Australia are used to determine the characteristics of individual convective up- and downdrafts observed at the site. Drafts are identified as vertically contiguous regions of instantaneous upward or downward motion exceeding 0.2ms21. Most updrafts and downdrafts found are less than 2 km in vertical extent, and updrafts exceeding 5 km in vertical length carry no more than 33% of the total upward mass flux. Updraft length correlates positively with rain rates, and on very high rain rates (greater than 20mmh21), average updraft lengths are;5 km. Typical peak updraft velocities increase from;2.5ms21 for the smallest to;..

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