2.3 Meteorological and oceanographic long-term study
In order to determine the combined effects of temperatures and storms on the disease outbreaks that occurred in 2010 and 2018, we analyzed historical meteorological and oceanographic data available since the first mortality event. We focused on 10 years of data from an oceanographic buoy located in Tenerife (Figure 1) (data used in Figures 2a and 3) and we also used the high-resolution tide data from January 2009 until December 2018 period (Figure 4), gathered from the mareogrpah located in La Gomera Island (Figure 1). Both, the buoy and the mareograph were located off the southern coast of the Islands where the massive die-off was first detected. The buoy collected hourly sea surface temperature (SST°C) and the daily wave height and direction data, and the mareograph collected data every 20 minutes. These data are free accessible from Puertos del Estado-Ministerio de Fomento, Gobierno de España- (http://www.puertos.es/es-es/oceanografia/Paginas/portus.aspx)as well as the characteristics of the buoy and the mareograph used by Puertos. The buoy wave height and direction data were grouped from December–February to better visualize the winter months over a ten-year period (Figure 3). The SST°C of every hour was also studied for the entire mortality period from 2010–2018, using buoy data.