Stepped Coastal Water Warming Revealed by Multiparametric Monitoring at NW Mediterranean Fixed Stations

Sensors

Ana Gordoa¹  Miguel Ángel Ahumada-Sempoal²  Charlotte Reuschel³  Raffaele Bernardello⁴  Francesc Peters⁵  Joan Baptista Company⁵  Nixon Bahamon⁵  Jacopo Aguzzi⁵  Joan Navarro⁵  Antonio Cruzado⁶  Zoila Velásquez⁶ 

[1] Centro de Estudios Avanzados de Blanes – CSIC, 17300 Blanes, Spain;Coastal Dynamics Laboratory, Universidad del Mar, Puerto Ángel, Oaxaca 70902, Mexico;Department of Chemistry and Biology, Hochschule Fresenius University of Applied Sciences, 65510 Idstein, Germany;Department of Earth Sciences, Barcelona Supercomputing Center, 08034 Barcelona, Spain;Instituto de Ciencias del Mar – CSIC, 08003 Barcelona, Spain;Oceans Catalonia International SL, 17300 Blanes, Spain;

关键词: marine-observing systems;    multiparametric buoy profiling;    long time-series;    water warming;    oligotrophy;   

DOI  :  10.3390/s20092658

来源: DOAJ

【 摘 要 】

Since 2014, the global land and sea surface temperature has scaled 0.23 °C above the decadal average (2009–2018). Reports indicate that Mediterranean Sea temperatures have been rising at faster rates than in the global ocean. Oceanographic time series of physical and biogeochemical data collected from an onboard and a multisensor mooring array in the northwestern Mediterranean Sea (Blanes submarine canyon, Balearic Sea) during 2009–2018 revealed an abrupt temperature rising since 2014, in line with regional and global warming. Since 2014, the oligotrophic conditions of the water column have intensified, with temperature increasing 0.61 °C on the surface and 0.47 °C in the whole water column in continental shelf waters. Water transparency has increased due to a decrease in turbidity anomaly of −0.1 FTU. Since 2013, inshore chlorophyll a concentration remained below the average (−0.15 mg·l⁻¹) and silicates showed a declining trend. The mixed layer depth showed deepening in winter and remained steady in summer. The net surface heat fluxes did not show any trend linked to the local warming, probably due to the influence of incoming offshore waters produced by the interaction between the Northern Current and the submarine canyon. Present regional and global water heating pattern is increasing the stress of highly diverse coastal ecosystems at unprecedented levels, as reported by the literature. The strengthening of the oligotrophic conditions in the study area may also apply as a cautionary warning to similar coastal ecosystems around the world following the global warming trend.

【 授权许可】

Unknown