Oceans and Seas

State of the Climate in Asia 2024

The World Meteorological Organization’s State of the Climate in Asia 2024 report warns that the region is warming nearly twice as fast as the global average, driving more extreme weather and posing serious threats to lives, ecosystems, and economies. In 2024, Asia experienced its warmest or second warmest year on …

Rapid retreat of permafrost coastline observed with aerial drone photogrammetry

Permafrost landscapes are changing around the Arctic in response to climate warming, with coastal erosion being one of the most prominent and hazardous features. Using drone platforms, satellite images, and historic aerial photographs, we observed the rapid retreat of a permafrost coastline on Qikiqtaruk – Herschel Island, Yukon Territory, in …

Contaminants in Europe's seas: moving towards a clean, non-toxic marine environment

There is a shared vision to achieve clean, non toxic seas but their contamination with synthetic substances as well as heavy metals continues to be a large-scale problem in Europe. According to a new European Environment Agency (EEA) report, between 75 and 96 % of the assessed area of Europe’s …

The unprecedented coupled ocean-atmosphere summer heatwave in the New Zealand region 2017/18: drivers, mechanisms and impacts

During austral summer (DJF) 2017/18, the New Zealand region experienced an unprecedented coupled ocean-atmosphere heatwave, covering an area of 4 million km2. Regional average air temperature anomalies over land were +2.2 °C, and sea surface temperature anomalies reached +3.7 °C in the eastern Tasman Sea. This paper discusses the event, …

30x30: a blueprint for ocean protection

This ocean sanctuaries scientific study maps out how to protect 30% of the world’s oceans by 2030, a target that scientists say is crucial in order to safeguard wildlife and to help mitigate the impacts of climate change. 30×30: A Blueprint For Ocean Protection is the result of a year-long …

More acidic seas devour marine food web

By the close of the century, parts of the Southern Ocean could become impoverished as more acidic seas displace abundant marine food resources. Tiny sea snails that form the basis of the food supply for one of the world’s richest ecosystems could disappear because the depth at which they can …

The imprint of microfibres in southern European deep seas

Pollution of the marine environment by large and microscopic plastic fragments and their potential impacts on organisms has stimulated considerable research interest and has received widespread publicity. However, relatively little attention has been paid to the fate and effects of microplastic particles that are fibrous in shape, also referred as …

Ocean-based measures for climate action

Current emission reduction pledges under the 2015 Paris Agreement are insufficient to keep global temperature “well below +2°C” in 2100 relative to pre-industrial levels and to reach targets of the United Nations Sustainable Development Goals. Increased political ambition is therefore required, as well as enhanced efforts in terms of both …

World Banks's new global fund PROBLUE to support health, productive oceans

The World Bank Group announced on Wednesday the creation of PROBLUE, a new multi-donor trust fund that will support healthy and productive oceans by tackling marine pollution, managing fisheries and fostering the sustainable growth of coastal economies. PROBLUE, which was announced on the sidelines of the U.N. General Assembly, supports …

Ecosystem-based adaptation from mountains to oceans: How people adapt to climate change by using nature

This publication intends to inspire policy and decision makers by showcasing a selection of solutions, that have been applied in very different settings. It shows that ecosystem-based adaptation (EbA) has ‘many faces’: It is being implemented successfully in a broad range of countries and ecosystems and it is being driven …

Climate change: Heat waves hit seawater hard, number doubled in last 35 years

Heat waves are not only seen on land but have also been detected in oceans. And, their effect on large water bodies might be even more devastating than on land, a new study has found. The heat in the oceans over the last few years has also been at record-breaking …

Scientists trace atmospheric rise in CO2 during deglaciation to deep Pacific Ocean

Long before humans started injecting carbon dioxide into the atmosphere by burning fossil fuels like oil, gas, and coal, the level of atmospheric CO2 rose significantly as the Earth came out of its last ice age. Many scientists have long suspected that the source of that carbon was from the …

Flow of funds to fight climate change dries up for developing countries

There are two main funding mechanisms to provide finance for projects in developing countries that will help fight climate change effects — the Global Environment Facility (GEF) and the Green Climate Fund (GCF). And, there is not-so-good news from both of them. Last week, a board meeting of the GCF …

A strategy for the conservation of biodiversity on mid-ocean ridges from deep-sea mining

Mineral exploitation has spread from land to shallow coastal waters and is now planned for the offshore, deep seabed. Large seafloor areas are being approved for exploration for seafloor mineral deposits, creating an urgent need for regional environmental management plans. Networks of areas where mining and mining impacts are prohibited …

Assessing, quantifying and valuing the ecosystem services of coastal lagoons

The natural conservation of coastal lagoons is important not only for their ecological importance, but also because of the valuable ecosystem services they provide for human welfare and wellbeing. Coastal lagoons are shallow semi-enclosed systems that support important habitats such as wetlands, mangroves, salt-marshes and seagrass meadows, as well as …

Southern Hemisphere westerlies as a driver of the early deglacial atmospheric CO2 rise

The early part of the last deglaciation is characterised by a ~40 ppm atmospheric CO2 rise occurring in two abrupt phases. The underlying mechanisms driving these increases remain a subject of intense debate. Here, we successfully reproduce changes in CO2, δ13C and Δ14C as recorded by paleo-records during Heinrich stadial …

Understanding Bjerknes compensation in meridional heat transports and the role of freshwater in a warming climate

The Bjerknes compensation (BJC) under global warming is studied using a simple box model and a coupled Earth system model. The BJC states the out-of-phase changes in the meridional atmosphere and ocean heat transports. Results suggest that the BJC can occur during the transient period of global warming. During the …

Primary productivity below the seafloor at deep-sea hot springs

The existence of a chemosynthetic subseafloor biosphere was immediately recognized when deep-sea hot springs were discovered in 1977. However, quantifying how much new carbon is fixed in this environment has remained elusive. In this study, we incubated natural subseafloor communities under in situ pressure/temperature and measured their chemosynthetic growth efficiency …

Exploring the potential for adopting alternative materials to reduce marine plastic litter

This report presents a range of alternative approaches and materials that have the potential for reducing our use of plastics for a range of common applications The report titled, ‘Exploring the Potential for Adopting Alternative Materials to Reduce Marine Plastic Litter’ assesses the potential of replacing conventional plastics with alternative …

Plastic pollution needs to be curbed, says UN Environment head Erik Solheim

Fifty per cent of the plastic we use is single-use or disposable. Each year, at least eight million tonnes of plastic end up in the oceans, the equivalent of a full garbage truck every minute. Plastic pollution is one of the biggest environmental threats and countries need better waste management …

Global quantity of plastic in oceans to nearly double to 250

About eight million tonnes of plastic end up in the oceans each year and the global quantity will nearly double to 250 million tonnes by 2025, says a new analysis paper. The new International Union for Conservation of Nature (IUCN) co-authored analysis paper, released recently, warned that the 'plastic soup' …

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