Skip to Main Content
Numerical simulation of the Maui Vortex in the trade windsAuthor(s): Kyozo Ueyoshi; John O. Roads; Francis Fujioka; Duane E. Stevens
Source: Journal of the Meteorological Society of Japan 74(6):723-744
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (5.98 MB)
DescriptionOn the island of Maui, the dispersion of air pollutants associated with the field burning of biomass is complicated because the persistent Maui Vortex in the lee of Haleakala tends to trap smoke making pollution concentration worse in the central valley. In the present study we describe the spatially as well as temporally continuous short-term climatology of the airflow in the central valley of Maui during a summer month under trade wind conditions, simulated by a high-resolution mesoscale model initialized and forced by large-scale objective analyses. These simulations are compared with station observations. Under persistent trade wind conditions, an eddy would form in the central valley, and would remain steady and stationary regardless of the time of the day with little indications of vortex shedding even if the Froude number Fr=Nx<0.4, where U is the uniform flow speed, H the height of the obstacle, and N the Brunt- Vaisala frequency. However, vortex shedding could occur if the West Maui mountains were removed. Two major factors contributing to formation, maintenance, and steadiness of the Maui Vortex, solar heating and the accelerated northerly flow over the valley resulting from deflection of the trades by West Maui, are discussed. Suggestions are made for preferred synoptic conditions for field burning.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
CitationUeyoshi, Kyozo; Roads, John O.; Fujioka, Francis; Stevens, Duane E. 1996. Numerical simulation of the Maui Vortex in the trade winds. Journal of the Meteorological Society of Japan 74(6):723-744.
- Numerical simulations of island-scale airflow over Maui and the Maui vortex under summer trade wind conditions
- Effects of trade-wind strength and direction on the leeside circulations and rainfall of the island of Hawaii
- Scaling nonreactive cross flow over a heated plate to simulate forest fires
XML: View XML