Publication Date
9-28-2020
Document Type
Article
Publication Title
Geophysical Research Letters
Volume
47
Issue
18
DOI
10.1029/2020GL089001
Abstract
Airborne cloud radar reveals extreme wildfire updrafts (~60 m s−1) and downdrafts (~30 m s−1) rivaling those in supercell thunderstorms. These extreme vertical velocities occur through a 3-km-deep layer and below the base of a developing pyrocumulonimbus (pyroCb) cloud, which extends to the tropopause at 12 km. In situ aircraft sampling shows updrafts are linked to large temperature and moisture excesses but remain subsaturated at flight level (i.e., below cloud base). Parcel estimates using the in situ data help explain how these “hot-moist” updrafts trigger the overlying pyroCb. The extreme vertical motions observed also pose a previously undocumented aviation hazard.
Funding Number
AGS‐1151930
Funding Sponsor
National Science Foundation
Keywords
extreme updrafts, fire behavior, pyrocumulus, remote sensing, wildfire plume dynamics
Department
Meteorology and Climate Science
Recommended Citation
B. Rodriguez, N. P. Lareau, D. E. Kingsmill, and C. B. Clements. "Extreme Pyroconvective Updrafts During a Megafire" Geophysical Research Letters (2020). https://doi.org/10.1029/2020GL089001
Comments
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