Numerical Study on Seasalt Depositions in Niigata Prefecture, Japan
Large scale blackout was happened in Niigata Kaetsu area of Japan on December 22, 2005, and about 650,000 households suffered. The blackout was mainly caused by electrical flashovers due to accretion of seasalt-riched wet-snow on the porcelain long-rod insulators, which were occurred approximately 20-30km away from coastal lines. In this study, a regional-scale modeling of seasalt is carried out to investigate seasalt transport processes and depositions around Niigata Kaetsu area. In the model, spatial and temporal distributions of seasalt mass concentrations are estimated by considering seasalt-related physical processes, i.e, the emission, the transport, the dry deposition, the in-cloud scavenging and the below-cloud scavenging. Meteorological values, such as wind velocity, kinetic viscosity, precipitation and so on, are obtained by carrying out meteorology simulations using the WRF model. Numerical simulations focusing on Niigata Prefecture in January 2010 are carried out. In order to assess the accuracy, the numerical results are compared with observation data. The numerical results show agreement with the observation data, and high seasalt concentrations in the atmosphere and snows are observed in Niigata Kaetsu area under west wind conditions at the south side of a rain band.
Seasalt Numerical simulations Dry and Wet depositions
Naoto Kihara Hiromaru Hirakuchi Akira Takahashi Shin Ohara Shin-ichi Fujita
Central Research Institute of Electric Power Industry,1646 Abiko,Abiko-shi,Chiba,270-1194,Japan
国际会议
西安
英文
635-640
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）