A study on the impact of mountainous terrain on transboundary and local pollution

Makiko Nakata; Itaru Sano; Sonoyo Mukai; Souichiro Hioki

doi:10.1117/12.2636089

28 October 2022 A study on the impact of mountainous terrain on transboundary and local pollution

Makiko Nakata, Itaru Sano, Sonoyo Mukai, Souichiro Hioki

Proceedings Volume 12265, Remote Sensing of Clouds and the Atmosphere XXVII; 122650A (2022) https://doi.org/10.1117/12.2636089
Event: SPIE Remote Sensing, 2022, Berlin, Germany

Conference Poster

Abstract

The area around the Japanese Alps, which is the focus of this study, is located at the center of Japan's main island and surrounded by mountains with multiple basins. Here, we investigated the effect of mountains on aerosol blocking with respect to transboundary pollution and estimated the effect of the mountain source with respect to local pollution using observations and simulations. A regional chemical transport model was employed for the study. To investigate the effect of mountains, simulations were conducted with and without mountains. From the results of these simulations, we estimated the mountain effects. The presence of mountains was found to increase or decrease aerosol concentration in some cases. However, when averaged over the simulation period, the results showed that mountains effectively reduce aerosol concentrations. On the days when aerosol concentrations increased due to the mountain effect, meteorological conditions with high local emissions and the basin effect acted synergistically to accelerate the increase in aerosol concentrations.

Citation Download Citation

Makiko Nakata, Itaru Sano, Sonoyo Mukai, and Souichiro Hioki "A study on the impact of mountainous terrain on transboundary and local pollution", Proc. SPIE 12265, Remote Sensing of Clouds and the Atmosphere XXVII, 122650A (28 October 2022); https://doi.org/10.1117/12.2636089

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