WINTER EVAPORATION ON A MOUNTAIN SLOPE, HAWAII

Evaporation measurements at six sites on the island mountain, Haleakala, Hawaii were conducted between late November, 1987 and early January, 1988. Measurements were compared with estimated evaporation using four models to determine the applicability of the models to tropical islands and to identify possible sources of error in model estimates. All four models tested underestimated evaporation at all sites. Positive heat advection from the surrounding ocean and from land sources increased evaporation at low elevations while mixing of dry air through the trade wind inversion greatly increased evaporation at the highest elevation. © 1990.