RT info:eu-repo/semantics/article
T1 Column integrated water vapor and aerosol load characterization with the new ZEN-R52 radiometer
A1 Almansa, Antonio Fernando
A1 Cuevas Agulló, Emilio
A1 Barreto, África
A1 Torres, Benjamín
A1 García, Omaira Elena
A1 García, Rosa Delia
A1 Velasco Merino, Cristian
A1 Cachorro Revilla, Victoria Eugenia
A1 Berjón Arroyo, Alberto Jesús
A1 Mallorquín, Manuel
A1 López, César
A1 Ramos, Ramón
A1 Guirado Fuentes, Carmen
A1 Negrillo, Ramón
A1 Frutos Baraja, Ángel Máximo de
K1 Remote sensing
K1 Teledetección
AB The study shows the first results of the column-integrated water vapor retrieved by the new ZEN-R52 radiometer. This new radiometer has been specifically designed to monitor aerosols and atmospheric water vapor with a high degree of autonomy and robustness in order to allow the expansion of the observations of these parameters to remote desert areas from ground-based platforms. The ZEN-R52 device shows substantial improvements compared to the previous ZEN-R41 prototype: a smaller field of view, an increased signal-to-noise ratio, better stray light rejection, and an additional channel (940 nm) for precipitable water vapor (PWV) retrieval. PWV is inferred from the ZEN-R52 Zenith Sky Radiance (ZSR) measurements using a lookup table (LUT) methodology. The improvement of the new ZEN-R52 in terms of ZSR was verified by means of a comparison with the ZEN-R41, and with the Aerosol Robotic Network (AERONET) Cimel CE318 (CE318-AERONET) at Izaña Observatory, a Global Atmosphere Watch (GAW) high mountain station (Tenerife, Canary Islands, Spain), over a 10-month period (August 2017 to June 2018). ZEN-R52 aerosol optical depth (AOD) was extracted by means of the ZEN–AOD–LUT method with an uncertainty of ±0.01 ± 0.13*AOD. ZEN-R52 PWV extracted using a new LUT technique was compared with quasi-simultaneous (±30 s) Fourier Transform Infrared (FTIR) spectrometer measurements as reference. A good agreement was found between the two instruments (PWV means a relative difference of 9.1% and an uncertainty of ±0.089 cm or ±0.036 + 0.061*PWV for PWV <1 cm). This comparison analysis was extended using two PWV datasets from the same CE318 reference instrument at Izaña Observatory: one obtained from AERONET (CE318-AERONET), and another one using a specific calibration of the 940-nm channel performed in this work at Izaña Atmospheric Research Center Observatory (CE318-IARC), which improves the PWV product.
PB MDPI
SN 2072-4292
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/52829
UL https://uvadoc.uva.es/handle/10324/52829
LA eng
NO Remote Sensing, 2020, vol. 12, n. 9, 1424
NO Producción Científica
DS UVaDOC
RD 18-nov-2024