- Our Research
My major researches have been focusing on studying the role of urbanization in extreme weather, heat waves, regional climate change, and air pollution through the use of observations and WRF/WRF-Chem modelling. Detail findings and significances of my major research including: (1) long-range transport air pollutants to Taiwan, including Asian dusts and air pollutants from China; biomass burning air pollutants from Indochina, (2) Urban heat island effect and urban pollution, (3) Regional Climate Changes.
Lin C.-Y.*, Y. H. Lee, C-Y. Kuo, W.-C., Chen, Y. F. Sheng, C-J. Su, (2018), Impact of river-dust events on air quality of western Taiwan during winter monsoon: observed evidence and model simulation, Atmospheric Environment, 192, 160-172. https://doi.org/10.1016/j.atmosenv.2018.08.048
Lin C.-Y*., Y-Y Chien, C-J. Su, M-T Kueh, S-C. Lung,(2017), Climate variability of heat wave and projection of warming scenario in Taiwan, Climatic Change,. https://doi.org/10.1007/s10584-017-2091-0
Lin C.-Y.*, C-J. Su, H. Kusaka, Y. Akimoto, Y.F. Sheng, J.C. Huang, H.H. Hsu, (2016): Impact of an improved WRF-urban canopy model on diurnal air temperature simulation over northern Taiwan, Atmos. Chem. Phys.,16, 1809-1822,2016. https://www.atmos-chem-phys.net/16/1809/2016/acp-16-1809-2016.pdf
Lin C.-Y.*, Y.J. Chua, Y.F. Sheng, H.H. Hsu, C.T. Cheng, Y.Y. Lin, (2015): Altitudinal and latitudinal dependence of future warming in Taiwan simulated by WRF nested with ECHAM5/MPIOM; International Journal of Climatology, 35, 1800-1809, DOI: 10.1002/joc.4118. https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.4118.
Lin C. –Y.*, C. Zhao, X. Liu, N. H. Lin, W.N.Chen, (2014): Modeling of long-range transport of Southeast Asia biomass burning pollutants to Taiwan and their radiative forcing over East Asia, Tellus B, 66, 1-17. 23733. http://dx.doi.org/10.3402/tellusb.v66.23733.
Lin C.-Y.*, Y. F. Sheng, W.-N. Chen, Z. Wang, C.-H. Kuo, W.-C. Chen, T. Yang, (2012): The impact of channel effect on Asian dust transport dynamics: A case in southeastern Asia, Atmos. Chem. Phys. 12, 1-15. https://www.atmos-chem-phys.net/12/271/2012/
Lin C. -Y.*,W.C. Chen, P.-L. Chang and Y.F. Sheng,(2011): Impact of urban heat island effect on the precipitation over complex geographic environment in northern Taiwan, Journal of Applied Meteorology and Climatology, 50, no.2, 339-353. doi: 10.1175/2010JAMC2504.1
Lin, C.-Y.*., H.M. Hsu, Y.H. Lee, C. H. Kuo, Y.F. Sheng, D. A. Chu, (2009): A new transport mechanism of biomass burning from Indochina as identified by modeling studies., Atmos. Chem. Phys., 9, 7901-7911. DOI: 10.5194/acp-9-7901-2009 https://www.atmos-chem-phys.net/12/271/2012/
Lin, C-Y.*,F Chen, J Huang, Y. A. Liou, W.C. Chen, W.N. Chen, Shaw C. Liu, (2008): Urban Heat Island Effect and its Impact on Boundary Layer Development and Land-Sea Circulation over Northern Taiwan, Atmospheric Environment, 42,5639-5649. https://doi.org/10.1016/j.atmosenv.2008.03.015
Lin, C.-Y.*, S. C. Liu, Charles C.-K. Chou , S.-J. Huang , C.-M. Liu, C.-H., Kuo , and C.-Y. Young, (2005): Long-range transport of aerosols and their impact on the air quality of Taiwan. Atmospheric Environment,39,6066-6076. DOI: 10.1016/j.atmosenv.2005.06.046
Improved urban canopy model in WRF and applications: We found the official released urban canopy model (UCM) coupled to WRF, may not only lead to over- or underestimation of urban fraction and AH in urban and non-urban areas, but spatial variation also affects the model-estimated temperature. To overcome the abovementioned limitation, we modified to consider the 2-D urban fraction and AH (WRF-UCM2D). WRF-UCM2D performed much better than WRF-UCM at non-urban stations with low urban fraction during nighttime. The achievement of this study has a crucial implication for assessing the impacts of urbanization on weather, air quality and regional climate.
Long-range transport of air pollutants to Taiwan: In the winter and spring times, the cold continental airs not only often outflow to Taiwan, but also bring air pollutants and dusts after frontal passage. Moreover, springtime happens to be the biomass burning season in Indochina peninsula (Indochina). Under favor weather conditions, the products of biomass burning pollutants could be transported easily to Taiwan and even East Asia. Due to the unique geographic location of Taiwan, that allows us to receive more than just one source in spring. The impacts are also essential and complex.
We first demonstrated that the leeside troughs over Indochina play a dominant role in the uplift of the pollutants below 3 km, and that the strong westerlies prevailing above 3 km transport those pollutants to Taiwan. Moreover, we successfully simulated and evaluated the radiative impact of biomass burning produces aerosols and air pollutants to Taiwan during springtime in Southeast Asia. Under the influence of biomass-burning aerosol plume transported by strong wind, there is a NE-SW zone stretching from southern China to Taiwan with reduction in shortwave radiation of about 20 Wm-2 at ground surface during study period. Such significant reduction in radiation attributed to biomass-burning aerosols and their impact on the regional climate in East Asia merit attention.
Regional Climate Changes study: It is difficult and inadequate to use a global model alone for projecting future climate changes such as Taiwan, a complex geographic nature island, due to its coarse resolution. We have performed dynamic downscaling of Taiwan’s climate in the recent past (1979-2003) and climate change projection for the near and distant future (2015-2039 and 2075-2099, respectively) by using the WRF model. The simulation is forced by the global model, ECHAM5/MPIOM. Projection of future climate changes revealed both altitudinal and latitudinal variations in warming trend, with more significant temperature increase in mountain areas than in plain areas toward the end of the 21st century and more obvious warming in the north than in the south of Taiwan. The results obtained in this study can be applied to other regions of similar latitudes and with comparable relief.