edu.ucar.opensky::articles:24211 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T06:32:00.328502 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7bc42xg https://doi.org/10.5067/MODIS/MYD04_L2.061 https Related Dataset #1 MYD04_L2 MODIS/Aqua Aerosol 5-Min L2 Swath 10km https://doi.org/10.5067/MODIS/MYD06_L2.061 https Related Dataset #2 MYD06_L2 MYD06_L2 MODIS/Aqua Clouds 5-Min L2 Swath 1km and 5km Aerosol impacts on warm-cloud microphysics and drizzle in a moderately polluted environment 2021-03-23T00:00:00Z publication https://n2t.org/ark:/85065/d7bc42xg https://doi.org/10.5194/acp-21-4487-2021 Chen, Y. author Wang, S. author Min, Q. author Lu, S. author Lin, P. author Lin, N. author Chung, K. author Joseph, Everette author UCAR/NCAR - Library publisher Climate is critically affected by aerosols, which alter cloud lifecycles and precipitation distribution through radiative and microphysical effects. In this study, aerosol and cloud property datasets from MODIS (Moderate Resolution Imaging Spectroradiometer), onboard the Aqua satellite, and surface observations, including aerosol concentrations, raindrop size distribution, and meteorological parameters, were used to statistically quantify the effects of aerosols on low-level warm-cloud microphysics and drizzle over northern Taiwan during multiple fall seasons (from 15 October to 30 November of 2005-2017). Our results indicated that northwestern Taiwan, which has several densely populated cities, is dominated by low-level clouds (e.g., warm, thin, and broken clouds) during the fall season. The observed effects of aerosols on warm clouds indicated aerosol indirect effects (i.e., increased aerosol loading caused a decrease in cloud effective radius (CER)), an increase in cloud optical thickness, an increase in cloud fraction, and a decrease in cloud-top temperature under a fixed cloud water path. Quantitatively, aerosol-cloud interactions (ACI = partial derivative lnCER/partial derivative ln alpha \(CWP), changes in CER relative to changes in aerosol amounts) were 0.07 for our research domain and varied between 0.09 and 0.06 in the surrounding remote (i.e., ocean) and polluted (i.e., land) areas, respectively, indicating aerosol indirect effects were stronger in the remote area. From the raindrop size distribution analysis, high aerosol loading resulted in a decreased frequency of drizzle events, redistribution of cloud water to more numerous and smaller droplets, and reduced collision-coalescence rates. However, during light rain (<= 1 mm h(-1)), high aerosol concentrations drove raindrops towards smaller droplet sizes and increased the appearance of drizzle drops. This study used long-term surface and satellite data to determine aerosol variations in northern Taiwan, effects on clouds and precipitation, and observational strategies for future research on aerosol-cloud-precipitation interactions. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation