Application of M5 Model Tree in Passive Remote Sensing of Thin Ice Cloud Microphysical Properties in Terahertz Region.

Dong, Pingyi; Liu, Lei; Li, Shulei; Hu, Shuai; Bu, Lingbing

This article presents a new method for retrieving the Ice Water Path (IWP), the median volume equivalent sphere diameter (Dme) of thin ice clouds (IWP 2, Dme me for thin ice clouds which is summarized by previous studies. We inverse IWP and Dme with the simulated brightness temperature and analyze the inversion performance of selected channels. The 874.4 ± 6.0 GHz channel provides the most accurate results, because of the strong brightness temperature response to the change of IWP in the forward radiative transfer model. In order to improve the thin ice clouds IWP and Dme retrieval accuracy at the middle-high frequency channels in Terahertz band, a dual-channel inversion method was proposed that combines the 448.0± 3.0 GHz and 664.0 ± 4.2 GHz channel. The error analysis shows that the results of the 874.4 ± 6.0 GHz channel and the dual-channel inversion are reliable, and the IWP inversion results meet the error requirement range proposed by previous studies.

ICE clouds; REMOTE sensing; BRIGHTNESS temperature; RADIATIVE transfer; TEMPERATURE inversions; SET functions; ERROR analysis in mathematics

Remote Sensing, 2021, Vol 13, Issue 13, p2569

2072-4292

Academic Journal

10.3390/rs13132569