Fog deposition measurement in a wetland developed at a flat terrain in the Pacific coast of eastern Hokkaido, northern Japan

Abstract

Fog might play an important role in the water balance in foggy regions. We measured the amount of fog deposition (deposition of fog and dew waters) using lysimeters in a flatland mire on the Pacific coast of eastern Hokkaido Island. During five observed nights, summer fog was observed on four nights: one night had advection fog and three nights had radiation fog. The amount of advection-fog deposition per night was 0.6 mm on average, reaching 20% of the daily evapotranspirative water loss from this mire. This value suggests that the advection-fog water supply is not negligible. In contrast, the amount of radiation-fog water supply per night was much smaller than the other terms of water balance such as rainfall and evapotranspiration, indicating that the amount of radiation-fog deposition is negligibly small. © 2010, The Society of Agricultural Meteorology of Japan. All rights reserved.