Spectroscopic imaging of sub-kilometer spatial structure in lower-tropospheric water vapor

Autor: D. R. Thompson, B. H. Kahn, P. G. Brodrick, M. D. Lebsock, M. Richardson, R. O. Green
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Atmospheric Measurement Techniques, Vol 14, Pp 2827-2840 (2021)
Druh dokumentu: article
ISSN: 2827-2021
1867-1381
1867-8548
DOI: 10.5194/amt-14-2827-2021
Popis: The subgrid spatial variability of water vapor is an important geophysical parameter for modeling tropical convention and cloud processes in atmospheric models. This study maps sub-kilometer spatial structures in total atmospheric column water vapor with visible to shortwave infrared (VSWIR) imaging spectroscopy. We describe our inversion approach and validate its accuracy with coincident measurements by airborne imaging spectrometers and the AERONET ground-based observation network. Next, data from NASA's AVIRIS-NG spectrometer enable the highest-resolution measurement to date of water vapor's spatial variability and scaling properties. We find second-order structure function scaling exponents consistent with prior studies of convective atmospheres. Airborne lidar data show that this total column measurement provides information about variability in the lower troposphere. We conclude by discussing the implications of these measurements and paths toward future campaigns to build upon these results.
Databáze: Directory of Open Access Journals
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