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Katata, Genki; Murao, Naoto*
Earozoru Kenkyu, 29(S1), p.168 - 175, 2014/04
A sophisticated one-dimensional land surface model (SOLVEG) and a new particle dry deposition scheme for chemical transport models (CTMs) developed by the authors for assessment of the effect of aerosols on vegetation are overviewed. The current major particle dry deposition schemes in CTMs are reviewed to find out the issue in less prediction accuracy in deposition velocity of sub-micron particles. The scheme overcomes the issue by including a state-of-the-art knowledge based on SOLVEG simulations and provide better estimations of deposition velocity in this size range. As an example of regional scale analysis using this new scheme, simulation results of atmospheric black carbon (BC) onto forest areas in Eastern Asia are demonstrated. Our studies presented in this paper show that the land surface model developed by the authors is effective to evaluate the impacts of aerosols on terrestrial biosphere.
Watanabe, Yoko*; Yamaguchi, Takashi*; Katata, Genki
Earozoru Kenkyu, 29(S1), p.176 - 182, 2014/04
The concentrations of atmospheric aerosols were measured by filter pack method from spring to autumn in eastern Hokkaido. Furthermore, the components of fog water collected by an active string fog collector and the diameter of fog droplets by fog monitor were analyzed in the same area. The concentrations of SO
and NH
in aerosols were highest during the growing period of forest trees in eastern Hokkaido. Mean diameter of fog droplets was larger than that in other areas. This suggests that fog deposition velocity would increase in this area. On the other hand, the shape and components of aerosols deposited on the surfaces of leaves of white birch trees were observed by SEM-EDX. Soil particles and particles including S, and NaCl particles were found. Washing treatment of the leaf surfaces of white birch showed that many particles deposited on the leaf surface are possible to be washed with raindrops.
Katata, Genki; Nagai, Haruyasu
Earozoru Kenkyu, 25(4), p.323 - 330, 2010/12
Recent progress of models for particle deposition onto vegetation and issues to validate these models are described in the present paper. It is insufficient to validate each modeled process included in these models through the comparison of size-resolved deposition velocity between calculations and observations. Considering the differences in environmental factors of various measurements campaigns, each modeled process should be validated using the data in the particle range where the process is dominant. Numerical simulation using detailed one-dimensional atmosphere-soil-vegetation model including particle deposition onto vegetation developed by the authors was carried out. The result showed that the model could reproduce measurements of deposition velocity onto the coniferous canopies for large (
1 
m) and very fine (
several 100 nm) particles. In the range of sub-micron particles, however, all existing models clearly underestimated measured deposition velocity given from various measurement campaigns. Electrostatic deposition, thermo- and diffusio-phoretic deposition, micro-roughness at the leaf surface, and particle growth under humid environment could affect particle deposition in the range. Vegetation parameters such as LAI and leaf width also have a significant effect on deposition velocity, suggesting that this effect should be included in future parameterizations of particle deposition velocity onto vegetation.
Earozoru Kenkyu, 18(2), p.125 - 132, 2003/06
None
Hashimoto, Shoji
Earozoru Kenkyu, 16(2), p.145 - 146, 2001/06
no abstracts in English
-ray irradiation*; Takada, Junichi
Earozoru Kenkyu, 12(1), p.50 - 56, 1997/00
no abstracts in English
C.Wu*; Hirota, Koichi; Hakoda, Teruyuki; Hashimoto, Shoji
Earozoru Kenkyu, 12(2), p.115 - 123, 1997/00
no abstracts in English
Matsui, Hiroshi
Earozoru Kenkyu, 11(4), p.337 - 348, 1996/00
no abstracts in English
Matsui, Hiroshi; Noguchi, Hiroshi
Earozoru Kenkyu, 8(1), p.58 - 65, 1993/00
no abstracts in English
Matsui, Hiroshi
Earozoru Kenkyu, 8(2), p.139 - 152, 1993/00
no abstracts in English
Matsui, Hiroshi
Earozoru Kenkyu, 8(2), p.153 - 159, 1993/00
no abstracts in English
J.M.Maekelae*
Earozoru Kenkyu, 8(3), p.261 - 262, 1993/00
no abstracts in English
*; Murata, Mikio
Earozoru Kenkyu, 7(3), p.230 - 239, 1992/00
no abstracts in English
Matsui, Hiroshi; Noguchi, Hiroshi
Earozoru Kenkyu, 7(4), p.346 - 355, 1992/00
no abstracts in English
Ikezawa, Yoshio
Earozoru Kenkyu, 5(3), p.212 - 216, 1990/00
no abstracts in English
Matsui, Hiroshi;
Earozoru Kenkyu, 4(2), p.127 - 134, 1989/00
no abstracts in English
Nishio, Gunji
Earozoru Kenkyu, 4(1), p.11 - 16, 1989/00
no abstracts in English
Matsui, Hiroshi; Ikezawa, Yoshio
Earozoru Kenkyu, 4(1), p.17 - 25, 1989/00
no abstracts in English
