{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:41:46Z","timestamp":1760150506277,"version":"build-2065373602"},"reference-count":29,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2023,11,15]],"date-time":"2023-11-15T00:00:00Z","timestamp":1700006400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministerio de Ciencia e Innovaci\u00f3n","award":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"],"award-info":[{"award-number":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"]}]},{"name":"Junta de Castilla y Le\u00f3n","award":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"],"award-info":[{"award-number":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"]}]},{"name":"EMPIR","award":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"],"award-info":[{"award-number":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"]}]},{"name":"MCIN\/AEI\/10.13039\/501100011033","award":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"],"award-info":[{"award-number":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"]}]},{"name":"COST (European Cooperation in Science and Technology)","award":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"],"award-info":[{"award-number":["PID2021-127588OB-I00","VA227P20","19ENV04 MAPP","TED2021-131211B-I00"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Aerosol optical depth (AOD) at night-time has become a hot topic in recent years due to the development of new instruments recording accurate ground-based lunar irradiance measurements, and the development of calibration methods and extraterrestrial irradiance models adapted to lunar photometry. This study uses all daytime and night-time AOD data available at Valladolid (Spain) from October 2016 to March 2022 in order to analyze its behavior and the added contribution of night data. The annual, monthly and daily AOD evolution is studied comparing daytime and night-time values and checking the correlation between them. For this purpose, the daily averages are computed, showing an annual pattern, with low AOD values throughout the year (mean value of AOD at 440 nm: 0.122), where winter months have the lower and summer the higher values, as observed in previous studies. All these AOD values are modulated by frequent desert dust events over the Iberian Peninsula, with a strong influence on daily and monthly mean values in February and March, where the strongest desert outbreaks occurred. The added new data confirm these results and the good correlation between daytime and night-time data. Also, a complete daily evolution is shown, observing that AOD and \u00c5ngstr\u00f6m exponent (AE) mean values vary by only \u00b10.02 in 24 h, with a maximum value at 06:00 UTC and minimum at 18:00 UTC for both parameters.<\/jats:p>","DOI":"10.3390\/rs15225362","type":"journal-article","created":{"date-parts":[[2023,11,15]],"date-time":"2023-11-15T10:57:46Z","timestamp":1700045866000},"page":"5362","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Analysis of Daytime and Night-Time Aerosol Optical Depth from Solar and Lunar Photometry in Valladolid (Spain)"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-9508-3886","authenticated-orcid":false,"given":"Celia","family":"Herrero del Barrio","sequence":"first","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5540-4721","authenticated-orcid":false,"given":"David","family":"Mateos","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4889-1781","authenticated-orcid":false,"given":"Roberto","family":"Rom\u00e1n","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0017-5591","authenticated-orcid":false,"given":"Ramiro","family":"Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"given":"Sara","family":"Herrero-Anta","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"given":"Daniel","family":"Gonz\u00e1lez-Fern\u00e1ndez","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"given":"Abel","family":"Calle","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6890-6648","authenticated-orcid":false,"given":"Carlos","family":"Toledano","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4627-9444","authenticated-orcid":false,"given":"Victoria Eugenia","family":"Cachorro","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]},{"given":"\u00c1ngel M\u00e1ximo","family":"De Frutos Baraja","sequence":"additional","affiliation":[{"name":"Group of Atmospheric Optics (GOA), University of Valladolid, 47011 Valladolid, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2023,11,15]]},"reference":[{"key":"ref_1","unstructured":"Boucher, O., Randall, D., Artaxo, P., Bretherton, C., Feingold, G., Forster, P., Kerminen, V., Kondo, Y., Liao, H., and Lohmann, U. 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