Copernicus Ocean State Report, issue 6

Journal of Operational Oceanography, Journal Year: 2022, Volume and Issue: 15(sup1), P. 1 - 220

Published: Aug. 31, 2022

Statement of main outcome: This section presents a satellite-based map potential eutrophic and oligotrophic areas in the European Seas for year 2020, together with time series eutrophication past 23 years (1998-2020) averaged over Exclusive Economic Zones (EEZs) each country.The were generated on basis comparison per-pixel chlorophyll-a data from remote sensing reporting corresponding climatological 90th percentile (P90) established 20-year baseline (1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017).The results showed few scattered areas, while extensive coastal shelf waters indicate status.The distributions point to localities that should be watch determine situ nutrient levels whether trend is sustained into future.The at EEZ level low percentages across area some remarkable high events occurring first decade study period, followed by an overall reduction 2013 onwards.Furthermore, several countries, indicator was often nil or never exceeded 1% area.Results are then compared those Sustainable Development Goal (SDG, set United Nations General Assembly) 14 global satellite-derived (target 14.1).

Language: Английский

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Acidification, deoxygenation, and nutrient and biomass declines in a warming Mediterranean Sea

Biogeosciences, Journal Year: 2022, Volume and Issue: 19(17), P. 4035 - 4065

Published: Sept. 1, 2022

Abstract. The projected warming, nutrient decline, changes in net primary production, deoxygenation and acidification of the global ocean will affect marine ecosystems during 21st century. Here, climate change-related impacts on Mediterranean Sea middle at end century are assessed using high-resolution projections physical biogeochemical state basin under Representative Concentration Pathways (RCPs) 4.5 8.5. In both scenarios, analysis shows dissolved contents euphotic intermediate layers basin, phytoplankton respiration carbon stock (including phytoplankton, zooplankton, bacterial biomass particulate organic matter). also show uniform surface subsurface reductions oxygen concentration driven by warming water column increase ecosystem as well an signal upper linked to inorganic content due CO2 absorption from atmosphere respiration. stronger RCP8.5 (worst-case) scenario and, particular, eastern limited influence exchanges Strait Gibraltar that part basin. On other hand, RCP4.5 emission a tendency recover values observed beginning for several variables second half period. This result supports idea – possibly based existence system such certain buffer capacity renewal rate implementation policies reducing could indeed be effective contribute foundation sustainability science policies.

Language: Английский

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Influences of digitalization on sustaining marine minerals: A path toward sustainable blue economy

Ocean & Coastal Management, Journal Year: 2023, Volume and Issue: 239, P. 106589 - 106589

Published: April 8, 2023

Language: Английский

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An evaluation of marine economy sustainable development and the ramifications of digital technologies in China coastal regions

Economic Analysis and Policy, Journal Year: 2024, Volume and Issue: 82, P. 554 - 570

Published: March 24, 2024

Language: Английский

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An Assessment of CO₂ Storage and Sea‐Air Fluxes for the Atlantic Ocean and Mediterranean Sea Between 1985 and 2018

Global Biogeochemical Cycles, Journal Year: 2024, Volume and Issue: 38(4)

Published: April 1, 2024

Abstract As part of the second phase Regional Carbon Cycle Assessment and Processes project (RECCAP2), we present an assessment carbon cycle Atlantic Ocean, including Mediterranean Sea, between 1985 2018 using global ocean biogeochemical models (GOBMs) estimates based on surface dioxide (CO 2 ) partial pressure (pCO products) interior dissolved inorganic observations. Estimates basin‐wide long‐term mean net annual CO uptake GOBMs pCO products are in reasonable agreement (−0.47 ± 0.15 PgC yr −1 −0.36 0.06 , respectively), with higher GOBM‐based likely being a consequence deficit representation natural outgassing land derived carbon. In GOBMs, increases time at rates close to what one would expect from atmospheric increase, but estimate rate twice as fast. The largest disagreement flux is found north 50°N, coinciding seasonal interannual variability. accumulation anthropogenic (C ant over 1994–2007 Ocean 0.52 0.11 according 28% 20% lower than that Around 70% this C taken up atmosphere, while remainder imported Southern through lateral transport.

Language: Английский

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Projected climate oligotrophication of the Adriatic marine ecosystems

Frontiers in Climate, Journal Year: 2024, Volume and Issue: 6

Published: Feb. 2, 2024

The Adriatic Sea hosts diverse marine ecosystems, characterized by rich biodiversity and unique ecological dynamics. Its intricate coastal habitats open waters support a range of species contribute to the region's economic significance. Unraveling consequences ongoing climate changes on this delicate environment is essential ensure future safeguard basin. To tackle problem, we developed biogeochemical model for entire basin, with horizontal resolution about 2 km 120 vertical levels, forced projections atmosphere, hydrology ocean circulation between 1992 2050, under emission scenario RCP8.5. projected 2031–2050 1992–2011 were evaluated ecoregions different trophic conditions, identified using k-medoid classification technique. results point toward generalized oligotrophication especially intense in northern estuarine areas, driven substantial decrease river discharge rivers Po Plain. This unproductive declining resources, together warming, salinization, acidification waters, cast doubt long-term resilience Northern food web structure, which has evolved thrive high conditions. outcome study provides stakeholders tool understand how potential decreases regimes Rivers could affect ecosystem its goods services future.

Language: Английский

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Monitoring Sea Surface Temperature and Sea Surface Salinity Around the Maltese Islands Using Sentinel-2 Imagery and the Random Forest Algorithm

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(2), P. 929 - 929

Published: Jan. 18, 2025

Marine regions are undergoing rapid evolution, primarily driven by natural and anthropogenic activities. Safeguarding these ecosystems necessitates the ability to observe their physical features control processes with precision in both space time. This demands acquisition of precise up-to-date information regarding several marine parameters. Thus, gain a comprehensive understanding ecosystems, this study employs remote sensing techniques, Machine Learning algorithms traditional situ approaches. Together, serve as valuable tools help comprehend distinctive parametric characteristics mechanisms occurring within Maltese archipelago. An empirical workflow was implemented predict spatial temporal variations sea surface salinity temperature from 2022 2024. achieved leveraging Sentinel-2 satellite platforms, random forest algorithm, data collected gliders floats. Subsequently, numerical generated algorithm were validated different error metrics converted into visual representations illustrate across Islands. The demonstrated strong performance predicting temperature, indicating its capability handle dynamic parameters effectively. Additionally, maps for all three years provided clear changes two

Language: Английский

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Modeling Carbon Budgets and Acidification in the Mediterranean Sea Ecosystem Under Contemporary and Future Climate

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 8

Published: Jan. 12, 2022

We simulate and analyze the effects of a high CO 2 emission scenario on Mediterranean Sea biogeochemical state at end XXI century, with focus carbon cycling, budgets fluxes, within between sub-basins, ocean acidification. As result overall warming surface water exchanges boundaries, model results project an increment in both plankton primary production system total respiration. However, productivity increases less than respiration, so these changes yield to decreament concentrations living carbon, chlorophyll, particulate organic oxygen epipelagic layer, DIC pool all over basin. In terms mass budgets, large dissolution atmospheric most including horizontal eastern western reduction component, increament inorganic one. The sub-basin accumulates more 85% absorbed . A clear acidification signal is observed basin, quantitatively similar those projected oceans, well detectable also down mesopelagic bathypelagic layers.

Language: Английский

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A case study of impacts of an extreme weather system on the Mediterranean Sea circulation features: Medicane Apollo (2021)

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: March 8, 2023

Abstract The attention of the scientific community, policymakers, and public opinion on Medicanes has recently grown because their increase in intensity harmful potential. Although may be influenced by pre-existing upper-ocean conditions, uncertainties remain about how such weather extremes influence ocean circulation. This work examines a condition that been never described before Mediterranean, which involves interplay between an atmospheric cyclone (Medicane Apollo—October 2021) cyclonic gyre located western Ionian Sea. During event, temperature core cold dropped dramatically, due to local maximum wind-stress curl, Ekman pumping, relative vorticity. Cooling vertical mixing surface layer combined with upwelling subsurface caused shoaling Mixed Layer Depth, halocline, nutricline. resulting biogeochemical impacts included oxygen solubility, chlorophyll concentration, productivity at surface, decreases layer. presence along Apollo's trajectory leads different response from observed previous Medicanes, endorsing efficiency multi-platform observation system integrated into operational model for future mitigation weather-related damages.

Language: Английский

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Multivariate Relationship in Big Data Collection of Ocean Observing System

Applied Sciences, Journal Year: 2023, Volume and Issue: 13(9), P. 5634 - 5634

Published: May 3, 2023

Observing the ocean provides us with essential information necessary to study and understand marine ecosystem dynamics, its evolution impact of human activities. However, observations are sparse, limited in time space coverage, unevenly collected among variables. Our work aims develop an improved deep-learning technique for predicting relationships between high-frequency low-frequency sampled Specifically, we use a larger dataset, EMODnet, train our model nutrient concentrations carbonate system variables (low-frequency variables) starting from such as sampling geolocation, temperature, salinity oxygen (high-frequency variables). Novel elements application include (i) calculation confidence interval prediction based on deep ensembles neural networks, (ii) two-step analysis quality check input data. The proposed method proves capable desired relatively small errors, outperforming results obtained by current state-of-the-art models.

Language: Английский

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