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Dennis Nullet

Abstract

Measured solar radiation, air temperature, and water vapor pressure at 17 stations on the northwest flank of Haleakala, Maui, Hawaii are compared with modeled clear day solar radiation and free atmosphere air temperature and water vapor pressure. The results indicate that the mountain acts as a heat source in summer and heat sink in winter. Surface vapor pressure is close to the free atmosphere value. Also, global solar radiation is reduced to as little as 51% of the clear day value (30% below the open ocean value), the highest solar radiation gradients are in summer, and solar radiation declines with elevation over the study area in both summer and winter except above 1200 m where it increases with elevation in winter.

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Dennis Nullet and Matthew Mcgranaghan

Abstract

An analysis of recently compiled, detailed rainfall maps for the Hawaiian Islands shows that rainfall over the Islands is enhanced up to 3.4 times that of the open ocean values.

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James O. Juvik and Dennis Nullet

Abstract

No abstract available

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James O. Juvik and Dennis Nullet

Abstract

Two years of climate data from a transect of three surface meteorological stations on the windward slopes of Mauna Loa, Hawaii, are analyzed. The stations constitute a transect between 700 and 1640 m through the wet, montane rain forest zone below the trade-wind inversion. Data are compared with previous short-term measurements for the area, and previously unreported climate elements such as photosynthetically active radiation and soil temperature are presented. While absolute values vary between the sites, annual and diurnal climate patterns for the sites are remarkably similar, despite the altitudinal range involved and the close proximity of the trade-wind inversion level to the upper station.

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