Abstract
Dust aerosols have great effects on global and regional climate systems. The Global Change Observation Mission-Climate (GCOM-C), also known as SHIKISAI, which was launched on 23 December 2017 by the Japan Aerospace Exploration Agency (JAXA), is a next-generation Earth observation satellite that is used for climate studies. The Second-Generation Global Imager (SGLI) aboard GCOM-C enables the retrieval of more precious global aerosols. Here, the first assimilation study of the aerosol optical thicknesses (AOTs) at 500 nm observed by this new satellite is performed to investigate a severe dust storm in spring over East Asia during 28–31 March 2018. The aerosol observation assimilation system is an integration of the four-dimensional local ensemble transform Kalman filter (4D-LETKF) and the Spectral Radiation Transport Model for Aerosol Species (SPRINTARS) coupled with the Non-Hydrostatic Icosahedral Atmospheric Model (NICAM). Through verification with the independent observations from the Aerosol Robotic Network (AERONET) and the Asian Dust and Aerosol Lidar Observation Network (AD-Net), the results demonstrate that the assimilation of the GCOM-C aerosol observations can significantly enhance Asian dust storm simulations. The dust characteristics over the regions without GCOM-C observations are better revealed from assimilating the adjacent observations within the localization length, suggesting the importance of the technical advances in observation and assimilation, which are helpful in clarifying the temporal–spatial structure of Asian dust and which could also improve the forecasting of dust storms, climate prediction models, and aerosol reanalysis.
Highlights
Through absorbing and scattering solar and Earth radiation, dust considerably influences the radiative budget of the atmosphere [1,2,3,4,5]
aerosol optical thicknesses (AOTs) simulated by experiment were more consistent with the Aerosol Robotic Network (AERONET)-observed overestimated compared with AERONET AOTs, which is probably due to the ones, indicating that Global Change Observation Mission-Climate (GCOM-C) aerosol data assimilation contributed to the reproduction anthropogenic aerosol emission inventory in this study developed inaround
Mission-Climate (GCOM-C) satellite enables us to retrieve more precious optical properties of global aerosols, which is important for further aerosol research
Summary
Through absorbing and scattering solar and Earth radiation, dust considerably influences the radiative budget of the atmosphere [1,2,3,4,5]. Absorbing aerosols, such as dust, can heat the atmosphere by absorbing the solar radiation [6]. Dust can serve as the ice nuclei (IN) and the cloud condensation nuclei (CCN) involved in the development of clouds, which can change a cloud’s lifetime and albedo [7,8].
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