Challenge 08: Create a digital representation of the ocean
CHALLENGE 8: Create a digital representation of the ocean:
Through multi-stakeholder collaboration, develop a comprehensive digital representation of the ocean, including a dynamic ocean map, which provides free and open access for exploring, discovering, and visualizing past, current, and future ocean conditions in a manner relevant to diverse stakeholders.
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DITTO Programme WhitepaperThis white paper provides an outline of the concept of digital twins of the ocean and lays out the challenges, opportunities for action, and suggestions for their implementation as defined by the UN Decade Action “Digital Twins of the Ocean” (DITTO).
Nonlinear tide-surge interactions in the Río de la Plata EstuaryEstuarine, Coastal and Shelf ScienceThe nonlinear tide-surge interaction (NTSI) can significantly affect the levels associated with storm surges that threaten coastal areas. In this work, water level observations and numerical simulations are used to investigate those interactions in the large, mighty and socio-economically important Río de la Plata (RdP) estuary. We introduce a novel objective approach to seek evidence of nonlinear interactions in hourly water level records from six tide gauges collected along the coast. Results indicate that NTSI occurs in the RdP and suggest that it becomes more important upstream and along the southern coast of the estuary. CROCO ocean numerical model is used to quantify the interactions, to determine the areas where they are stronger, and to identify their sources. The amplitude of the interaction accounts for 16% of the total water level at the upper RdP, being comparable to tidal amplitude. The quadratic bottom friction is the principal cause of NTSI, and is modulated by the tidal current; therefore the nonlinearity is present all the time and is independent of the wind speed and direction. This is a particularity of this estuary and occurs because, as a consequence of its large width, surge currents are weak in spite of the big volume of water mobilized by the storms. Due to its nature, the interaction attenuates and smoothes the level anomalies due to the surge. Results highlight the need of utilizing a complete NTSI model for the forecast of the surge in the RdP; otherwise, the estuarine dynamic would be misrepresented generating significant forecasts errors (10%–20% at the upper RdP).
Transformational Opportunities for People, Ocean, and Planet.In 2020, the Blue Climate Initiative engaged with sixty multidisciplinary scientists and academic experts to identify the most promising Transformational Opportunities (TOPS) to address climate change using the power of the ocean, while serving humanity’s needs. Their insights are published in six thematic papers centered on food and nutrition, marine energy and transportation, biodiversity and nature-based solutions, mineral and genetic resources, health and well-being, and sustainable tourism. This Compendium presents over forty such TOPS that can sustain Earth’s people, steward our ocean, and heal our planet.
CSK-2 Data and Information Management Plan. Version 1The Draft CSK-2 Data and Information Management Plan (DIMP) was prepared by the CSK-2 Task Force on Data and Information Management Plan, which was formed as per the decision of the CSK-2 International Steering Group at its first meeting (virtual, 8 December 2021).