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A determination of the Dalton and Stanton numbers over a saturated barley field

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Abstract

In order to determine the values of the Dalton and the Stanton numbers, an observational study was made over a saturated barley field in the Hachirogata. flat reclaimed land located in the northern part of Japan. The mean height of the barley was about 11 cm; the roughness height for momentum was determined from the mean wind profiles as 4.24 ± 0.18 cm and the zero-plane displacement height as 0 cm. Under neutral stratification and a saturated surface, the reciprocals of the Dalton and Stanton numbers, Da-1 and St-1, were estimated. The results show that the mean value of St-1 is 12.1, and the ratio of the bulk transfer coefficient for heat to that for momentum. C H/CM, is 0.53, which are not entirely incompatible with the few results available from past observations. The mean value of Da- is 38.2. This value is larger than St-1, and fits reasonably well with the semi-empirical equation proposed by Brutsaert (1975a,b).

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Author notes

  1. Tokiyoshi Toya

    Present address: Japan Meteorological Agency, Tokyo, Japan

  2. Nobuhisa Yasuda

    Present address: Tohoku University, Sendai, Japan

Authors and Affiliations

  1. Meteorological Research Institute, Nagamine, Tsukuba, 305, Ibaraki-Pref., Japan

    Tokiyoshi Toya & Masao Mikami

  2. Meteorological College, Asahi-cho, 277, Kashiwa, Japan

    Nobuhisa Yasuda

Authors
  1. Tokiyoshi Toya
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  2. Masao Mikami
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  3. Nobuhisa Yasuda
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Toya, T., Mikami, M. & Yasuda, N. A determination of the Dalton and Stanton numbers over a saturated barley field. Boundary-Layer Meteorol 52, 377–395 (1990). https://doi.org/10.1007/BF00119430

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