High-Resolution Prediction for the Amount of Airborne Sea Salt by Multi-Scale Weather Simulation

Ryo Onishi; Keigo Matsuda; Hitoshi Suto; Yasuo Hattori; Hiromaru Hirakuchi; Shigeyuki Matsunami; Shinjiro Yagyu; Tadashi Shinohara; Hideki Katayama

doi:10.2320/matertrans.C-M2021848

Environment

High-Resolution Prediction for the Amount of Airborne Sea Salt by Multi-Scale Weather Simulation

Ryo Onishi, Keigo Matsuda, Hitoshi Suto, Yasuo Hattori, Hiromaru Hirakuchi, Shigeyuki Matsunami, Shinjiro Yagyu, Tadashi Shinohara, Hideki Katayama

Author information

Ryo Onishi
Global Scientific Information, Tokyo Institute of Technology
Research Institute for Value-Added-Information Generation, Japan Agency for Marine-Earth Science and Technology
Keigo Matsuda
Research Institute for Value-Added-Information Generation, Japan Agency for Marine-Earth Science and Technology
Hitoshi Suto
Civil Engineering Research Laboratory, Central Research Institute of Electric Power Industry
Yasuo Hattori
Civil Engineering Research Laboratory, Central Research Institute of Electric Power Industry
Hiromaru Hirakuchi
Civil Engineering Research Laboratory, Central Research Institute of Electric Power Industry
Shigeyuki Matsunami
Research and Services Division of Materials Data and Integrated System, National Institute for Materials Science
Shinjiro Yagyu
Research Center for Functional Materials, National Institute for Materials Science
Tadashi Shinohara
Corrosion Property Group, Research Center for Structural Materials, National Institute for Materials Science
Hideki Katayama
Corrosion Property Group, Research Center for Structural Materials, National Institute for Materials Science

Keywords: atmospheric corrosion, sea salt particle, weather simulation, computational fluid dynamics, high-resolution corrosion map

JOURNAL FREE ACCESS FULL-TEXT HTML

2021 Volume 62 Issue 12 Pages 1785-1790

DOI https://doi.org/10.2320/matertrans.C-M2021848

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Abstract

A new methodology to calculate and visualize the amount of airborne sea salt with a 100 m mesh resolution in high definition has been proposed in this study. A transport calculation module for airborne sea salt is implemented to the atmospheric component of the multi-scale atmosphere–ocean coupled model. The computational fluid dynamics model (NuWiCC-ST) results that can calculate the generation and transport of sea salt particles are incorporated to the transport calculation. The coupled methodology has been applied to create a corrosion environment map for Choshi City. The reliability of the developed method was confirmed by comparing airborne sea salt data measured using the dry gauze method with the calculated data.

This Paper was Originally Published in Japanese in ZAIRYO-TO-KANKYO 69 (2020) 169–174.

Fig. 4 A 100 m-resolution map of seasalt concentration in the lowest layer (z = 37.5 m). Mean values for 5 days (July 1–6, 2017) are shaded in a rainbow color. The contour shows the topography used for the calculation. Fullsize Image

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