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 …

Decline of forereef corals in response to recent warming linked to history of thermal exposure

Rising ocean temperatures have reduced rates of coral calcification and increased rates of coral mortality, thereby negatively impacting the health of coral reef ecosystems. Nevertheless, the response of corals to thermal stress seems to vary spatially across the reef environment. Here, we show that between 1982 and 2008 in the …

Ocean oxygenation in the wake of the Marinoan glaciation

Data are presented that support the idea of an oxygenation event in the immediate aftermath of the Marinoan glaciation, pre-dating previous estimates for post-Marinoan oxygenation by more than 50 million years.

Acidifying seas threaten island nations' food security -study

Food security problems caused by climate change and ocean acidification will hit small island and coastal nations hardest, environmental group Oceana said on Monday. The Comoros islands in the Indian Ocean headed the non-profit group's rankings of nations most vulnerable to the combined effects of higher carbon dioxide emissions and …

Global warming can intensify tropical rainfall

A resident watches the water as dikes on the Salmon River gave way in Truro, Nova Scotia on Monday, Sept. 10, 2012. The area is under a rainfall warning as Tropical Storm Leslie churns toward Atlantic Canada. Leslie is expected to make landfall in Newfoundland bringing heavy rain and high …

West African and Caribbean seas rank among unhealthiest waters

More research and better policies are needed to protect the world's most vulnerable seas, lying off the coast of West Africa and the Caribbean, local experts have told SciDev.Net. The two regions have some of the world's unhealthiest seas, according to a new index that assessed the health of seas …

Nation to upgrade maritime satellite network by 2020

China plans to launch eight satellites providing ocean and land data before 2020, a senior official said on Wednesday. "The planned satellite launches, including four satellites observing the color of the sea, two observing ocean currents and two maritime radar satellites before 2020, have been approved by the National Development …

Futuristic 'icebergs' float to rescue of polluted oceans

A set of floating inverted skyscraper-like structures capable of coverting ocean litter into energy have been designed by architects. The 'seascrapers' would be self-sustaining mobile facilities floating in the ocean. Much like icebergs, they would remain submerged largely beneath the surface, but would actively seek to collect materials such as …

Capturing the monsoons

It's a season that inspires and engages everyone, from the farmer to the policy maker. From the scientist to the travel writer. From the economist to the music critic, and from the botanist to the epicure. In a year in which the monsoon has played truant, Down To Earth invited …

A Cenozoic record of the equatorial Pacific carbonate compensation depth

Atmospheric carbon dioxide concentrations and climate are regulated on geological timescales by the balance between carbon input from volcanic and metamorphic outgassing and its removal by weathering feedbacks; these feedbacks involve the erosion of silicate rocks and organic-carbon-bearing rocks. The integrated effect of these processes is reflected in the calcium …

An index to assess the health and benefits of the global ocean

This study develops a wide-ranging index to assess the many factors that contribute to the health and benefits of the oceans, and the scores for all costal nations are assessed.

Tiny Pacific island nations create world's largest marine parks

Two of the world's smallest countries are to place nearly 2.5 million square kilometres of south Pacific Ocean in newly created marine protected areas. The Cook Islands, nation of 20,000 people on 15 islands, formally announced on Tuesday the creation of the world's largest marine park covering nearly 1.1m sq …

Sea ice in Arctic at record low level

The amount of sea ice in the Arctic has fallen to the lowest level on record, a confirmation of the drastic warming in the region. Satellites tracking the extent of the sea ice found over the weekend that it covered about 1.58 million square miles, or less than 30 per …

El Nino to hit monsoon in Sept, North to feel pinch

New Delhi: Expecting the manifestation of weak to moderate El Nino conditions in September, sources in the Indian Meteorological Department have said that the last month of the monsoon is likely to have below 90% of the long period average rain. Northwest India, where the rain of the past two …

Oceans hold key to future of N-power

London: Oceans which are a rich source of uranium may soon hold the future of nuclear power as scientists are developing a cost-effective way to extract the precious metal from the waterbodies through special mats. A team of researchers led by Robin Rogers, from University of Alabama are making cheaper …

Identifying conservation needs in India’s offshore waters

The report, a first of its kind in India, is a biodiversity atlas of the Indian waters in the Exclusive Economic Zone and overlays available GIS data on oceanic species and habitats, sea grass, seamounts and charismatic megafauna like dolphins, whales and turtles to recommend conservation and management for some …

Papua New Guinea's seabed to be mined for gold and copper

Government approves world's first commercial deep-sea mining project despite vehement objections over threat to marine life A "new frontier" in mining is set to be opened up by the underwater extraction of resources from the seabed off the coast of Papua New Guinea, despite vehement objections from environmentalists and local …

India explores seawater-drinking water convertibility

Converting seawater into potable water through the Low Temperature Thermal Desalination (LTTD) may not be an answer to India’s water woes, but any advancement in technology has the potential for adding water options for the future. After the successful run of the National Institute of Ocean Technology (NIOT) experimental one-MLD …

Nature soaks up more greenhouse gases, brakes warming

Oceans and land have more than doubled the amount of greenhouse gases they absorb since 1960 in new evidence that nature is helping to brake global warming, a study showed on Wednesday. "Even though we have done very little to decrease our emissions, the Earth continues to lend us a …

Increase in observed net carbon dioxide uptake by land and oceans during the past 50 years

A comprehensive carbon dioxide mass balance analysis shows that net global carbon uptake has increased by about 0.05 billion tonnes per year over the past 50 years and that in that time the global carbon uptake has almost doubled, making it unlikely that land and ocean carbon sinks have decreased …

Persistent near-tropical warmth on the Antarctic continent during the early Eocene epoch

A reconstruction of temperatures along the Wilkes Land coast of Antarctica during the early Eocene epoch shows that the climate supported the growth of near-tropical forests and that winters were very mild and essentially frost-free.

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