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20 December 2024 Observation of deep convective cloud-top height and vertical temperature structure of hurricane using hyperspectral infrared sounder and its single-field-view retrieval products
Xiaozhen Xiong, Xu Liu, Wan Wu, Liqiao Lei, Qiguang Yang, Daniel K. Zhou, Allen M. Larar
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Proceedings Volume 13266, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications VIII; 1326609 (2024) https://doi.org/10.1117/12.3039281
Event: Asia-Pacific Remote Sensing, 2024, Kaohsiung, Taiwan
Abstract
A new method utilizing hyperspectral infrared sounders is developed to estimate Cloud Top Height (CTH) for deep convective clouds associated with hurricane, or Tropical Cyclone (TC). By analyzing measurements from the Cross-track Infrared Sounder (CrIS), and further validating with radiative transfer simulations, we found an inverted-V spectral feature in the ozone (O3) band near 9.6 μm for thick clouds, and its depth, designated as H_index, has a strong correlation with CTH. Using a linear regression, a formula is derived to calculate the CTH based on H_index and Brightness Temperature (BT) in other three channels. This method effectively captures the cloud structure of a TC's eyewall and surrounding rainbands, with an error of -0.05 ± 0.19 km (or -0.41 ± 1.96%). Further analysis reveals that the retrieved temperature profiles near hurricane’s eye from a new single Field of View sounder products (SiFSAP) from CrIS agree reasonably well with the reanalysis data from MERRA-2 and ERA-5. This method can be easily applied to operationally monitor hurricane cloud and its development, and the estimated CTH can be also used as a-priori to improve the retrieval products.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Xiaozhen Xiong, Xu Liu, Wan Wu, Liqiao Lei, Qiguang Yang, Daniel K. Zhou, and Allen M. Larar "Observation of deep convective cloud-top height and vertical temperature structure of hurricane using hyperspectral infrared sounder and its single-field-view retrieval products", Proc. SPIE 13266, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications VIII, 1326609 (20 December 2024); https://doi.org/10.1117/12.3039281
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KEYWORDS
Clouds
Hurricanes
Infrared radiation
Analytical research
Air temperature
Eye models
Absorption
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