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. 2022 Jan 11;817:153002. doi: 10.1016/j.scitotenv.2022.153002

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© 2022 The Authors

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 2 — (a) Chl-a concentration in the North Adriatic Sea during the Italian lockdown from OLCI (See Methods); the black line indicates the 2017–2019 climatologic values of Chl-a concentration; the grey shadow indicates the standard deviation; dots represent the weekly means of Chl-a concentration (green) below the climatologic value, (blue) above the climatologic value and below the standard deviation, (red) above the climatologic value and above the standard deviation; the red shaded area indicates the 2020 Italian lockdown. Anomalies of Chl-a concentration for the weeks (b) 25–31 March, (c) 1–7 April, and (d) 8–14 April 2020.