Year of Publication | 2015 | Division | Applied Meteorology Research Division |
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Title | Development of a Oak Pollen Emission and Transport Modeling Framework in South Korea | ||
Author | imyunkyu | ||
Coauthor | "김규랑, 조창범, 김미진, 최호성, 한매자, 오인보, 김백조 | ||
ISBN(ISSN) | 1598-3560 | Name of Journal | 대기지 |
Category (International/Domestic) | 국내 | Vol. No. | 25 |
Research Project Title | 응용기상기술개발연구 (2015년) | Publication Date | 2015-06-30 |
Keywords | LDAPS, CMAQ, pollen, emission |
Pollen is closely related to health issues such as allergenic rhinitis and asthma as well as intensifying atopic syndrome. Information on current and future spatio-temporal distribution of allergenic pollen is needed to address such issues. In this study, the Community Multiscale Air Quality Modeling (CMAQ) was utilized as a base modeling system to forecast pollen dispersal from oak trees. Pollen emission is one of the most important parts in the dispersal modeling system. Areal emission factor was determined from gridded areal fraction of oak trees, which was produced by the analysis of the tree type maps (1:5000) obtained from the Korea Forest Service. Daily total pollen production was estimated by a robust multiple regression model of weather conditions and pollen concentration. Hourly emission factor was determined from wind speed and friction velocity. Hourly pollen emission was then calculated by multiplying areal emission factor, daily total pollen production, and hourly emission factor. Forecast data from the KMA UM LDAPS (Korea Meteorological dministration Unified Model Local Data Assimilation and Prediction System) was utilized as input. For the verification of the model, daily observed pollen concentration from 12 sites in Korea during the pollen season of 2014. Although the model showed a tendency of over-estimation in terms of he seasonal and daily mean concentrations, overall concentration was similar to the observation. Comparison at the hourly output showed distinctive delay of the peak hours by the model at the ‘Pocheon’ site. It was speculated that the constant release of hourly number of pollen in the modeling framework caused the delay.