English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

In this paper we investigate the correlation between the atmosphericperturbations at Paranal Observatory and the Chilean coast tides, which aremostly modulated by the 14-day syzygy solar-lunar tidal cycle. To this aim, wedownloaded 15 years (2003-2017) of cloud coverage data from the AQUA satellite,in a matrix that includes also Armazones, the site of the European ExtremelyLarge Telescope. By applying the Fast Fourier Transform to these data wedetected a periodicity peak of about 14 days. We studied the tide cycle atChanaral De Las Animas, on the ocean coast, for the year 2017, and wecorrelated it with the atmospheric perturbations at Paranal and the lunarphases. We found a significant correlation (96%) between the phenomena of shortduration and intensity (1-3 days) and the tidal cycle at Chanaral. We then showthat an atmospheric perturbation occurs at Paranal in concomitance with the lowtide, which anticipates the full (or the new) moon by 3-4 days. This resultallows to improve current weather forecasting models for astronomicalobservatories by introducing a lunar variable.

Detection of a 14-days atmospheric perturbation peak at Paranal associated with lunar cycles