Preprints
https://doi.org/10.5194/gmd-2024-25
https://doi.org/10.5194/gmd-2024-25
Submitted as: development and technical paper
 | 
11 Mar 2024
Submitted as: development and technical paper |  | 11 Mar 2024
Status: this preprint is currently under review for the journal GMD.

Deep Learning Driven Simulations of Boundary Layer Cloud over the US Southern Great Plains

Tianning Su and Yunyan Zhang

Abstract. This study developed a deep learning model to simulate the complex dynamics of boundary layer clouds (BLCs) over the US Southern Great Plains. Using over twenty years of extensive observations from the Atmospheric Radiation Measurement program for training and validation, the model diagnoses the BLCs from the perspective of cloud-land coupling. Morning meteorological profiles set as the initial conditions and then identifying triggers for BLCs formation from surface meteorology. The deep learning model offer accurate simulation of the convection initiation and cloud base of BLCs. In comparison with reanalysis data (i.e., ERA-5 and MERRA-2), it provides a notable improvement in the vertical structure of low clouds from a climatological perspective. The deep learning model can serve as the cloud parameterization and extend to analyzing stratiform and cumulus clouds within reanalysis frameworks, offering insights into improving the simulation of BLCs. By quantifying biases due to various meteorological factors and parameterizations, this deep learning-driven approach bridges the observational-modeling divide. Surface humidity and parameterization emerge as key limiting factors to affect the representation of BLCs in the reanalysis data. This deep learning approach holds promise for improving the convection parameterization and advancing model diagnostics in weather forecasting and climate modelling.

Tianning Su and Yunyan Zhang

Status: open (until 16 May 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
Tianning Su and Yunyan Zhang
Tianning Su and Yunyan Zhang

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Short summary
Using two decades of field observation over the Southern Great Plains, this study developed a deep learning model to simulate the complex dynamics of boundary layer clouds. The deep learning model can serve as the cloud parameterization within reanalysis frameworks, offering insights into improving the simulation of low clouds. By quantifying biases due to various meteorological factors and parameterizations, this deep learning-driven approach bridges the observational-modeling divide.