Chen, Yi-Chun陳怡均

Assistant Research Fellows

Research Interests

Analysis on air quality, atmospheric composition, and aerosols and Aerosol-cloud-climate interactions

Representative Publications

Chen, Y.-C.*, J.-L. F. Li, W.-L. Lee, D. Diner, M. Garay, J. Jiang, Y.-H. Wang, J.-Y. Yu, O. Kalashnikova (2020), Evaluation of sea salt aerosols in climate systems: global climate modeling and observation-based analyses, Environ. Res. Lett., 15, 034047, doi:    10.1088/1748-9326/ab751c.

 Lin, C.-A., Chen, Y.-C.*, Liu, C.-Y., Chen, W.-T., Seinfeld, J. H., Chou, C. C.-K. (2019). Satellite–derived correlation of SO2, NO2, and aerosol optical depth with meteorological conditions over East Asia from 2005 to 2015, Remote Sens., 2019, 11, 1738.

Christensen, M. W.*, Y.-C. Chen, and G. L. Stephens, Aerosol indirect effect dictated by liquid clouds, 2016, J. Geophys. Res. Atmos., 121, 14,636–14,650, doi:10.1002/2016JD025245.

Chen, Y.-C., Christensen, M. W., Diner, J. D., and Garay, M. J. (2015), Aerosol-cloud interactions in ship tracks using Terra MODIS/MISR, J. Geophys. Res. Atmos., 120, doi:10.1002/2014JD022736.

Jung, E., Albrecht, B. A., Jonsson, H. H., Chen, Y.-C., Seinfeld, J. H., Sorooshian, A., Metcalf, A. R., Song, S., Fang, M., and Russell, L. M. (2015), Precipitation effects of giant cloud condensation nuclei artificially introduced into stratocumulus clouds, Atmos. Chem. Phys., 15, 5645-5658, doi:10.5194/acp-15-5645-2015. 

Chen, Y.-C., Christensen, M. W., Stephens, G. L., and Seinfeld, J. H. (2014), Satellite-based estimate of global aerosol–cloud radiative forcing by marine warm clouds, Nature Geoscience, doi:10.1038/ngeo2214.

Chen, Y.-C., Christensen, M. W., Xue, L., Sorooshian, A., Stephens, G. L., Rasmussen, R. M., and Seinfeld, J. H. (2012), Occurrence of lower cloud albedo in ship tracks, Atmos. Chem. Phys., 12, 8223-8235, doi:10.5194/acp-12-8223-2012.

Russell, L. M., Sorooshian, A., Seinfeld, J. H., Albrecht, B. A., Nenes, A., Ahlm, L., Chen, Y.-C., Coggon, M., Craven, J. S., Flagan, R. C., Frossard, A. A., Jonsson, H., Jung, E., Lin, J. J., Metcalf, A. R., Modini, R., Muelmenstaedt, J., Roberts, G. C., Shingler, T., Song, S., Wang, Z., and Wonaschuetz, A. (2012), Eastern Pacific Emitted Aerosol Cloud Experiment (E-PEACE), B. Am. Meteorol. Soc., 94, 709–729, doi: http://dx.doi.org/10.1175/BAMS-D-12-00015.1.

Chen, Y.-C., Xue, L., Lebo, Z. J., Wang, H., Rasmussen, R. M., and Seinfeld, J. H. (2011), A comprehensive numerical study of aerosol-cloud-precipitation interactions in marine stratocumulus, Atmos. Chem. Phys., 11, 9749-9769, doi:10.5194/acp-11-9749-2011.

Highlights

Climate change projection under RCP emission scenarios:  Using the high-resolution projection data from the HiRAM and MRI-AGCM (including d4PDF data) and also coarser-resolution CMIP5/6 models (including TaiESM) to conduct a series of climate change studies with the focus on East Asian monsoon and climate systems (e.g., front, drought, atmospheric river) that affect Taiwan.

Analysis on air quality, atmospheric composition, and aerosols:   To acquire a better comprehension of aerosol emission source and air quality, and to improve our understanding of the chemical and physical processes affecting the air quality, the following methods/analyses are carried out:

  1. Remote sensing: The satellite data from OMI, TROPOMI, and MODIS are analyzed to investigate the spatial-temporal variability of SO2, NO2, and aerosol properties over East Asia. Also, the relationship between the seasonal pattern of pollutants/aerosols and synoptic weather systems/meteorological conditions are studied. We further estimate the emission inventories from major pollution sources over Taiwan. 
  2. Aircraft measurements: The field campaign “Effect of Megacities on the transport and transformation of pollutants on the Regional and Global scales over Asia (EMeRGe-Asia)”, led by University Bremen, and collaborated with Academia Sinica, aims to investigate the characters and influence of pollution plumes using aircraft research platform. The chemical compositions of pollutants were measured both during the research flights and from ground stations. By integrating the aircraft and ground-based measurements, this facilitates a more comprehensive analysis of the transport and chemistry of plumes from pollution sources over western Taiwan.

Aerosol-cloud interactions:  Multi-sensory satellite observations are applied to study the sensitivity of cloud properties to aerosol levels and large scale environmental conditions. In an earlier study, an unprecedented quantitative estimate of global aerosol–marine cloud radiative forcing and its associated uncertainty was quantified using multi-year A-Train satellite data (Chen et al., 2014). Also, the aerosol-cloud interactions under different mesoscale cloud structures and environments were investigated based on ship tracks observed from satellite and research flights (Chen et al., 2012; 2015). An ongoing work is to untangle the aerosol-cloud-meteorology interactions under different synoptic weather systems over East Asia.

  • Post-doc Scholar
    Jet Propulsion Laboratory
    NASA/Caltech (2015)
  • Ph.D.
    Environmental Science and Engineering
    California Institute of Technology, Pasadena, CA, US (2013)
  • B.S.
    Atmospheric Sciences
    National Taiwan University, Taipei, Taiwan (2006)
  • (02) 2787-5874

  • yichunchen

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