In thin ground inversion cloud, the cloud bottom temperature was higher, the vertical convection was stronger, the super-cooled water increased faster and the content was richer.

近地面有薄逆温层云体，云底温度高，云中垂直运动强，云中过冷云水含量增长迅速且丰富。

youdao

"An inversion layer is keeping the smoke close to the ground, limiting visibility and reducing helicopter air operations, " Berry said.

CNN: Firefighters make headway in California wildfire