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 …

The Little Green Data Book 2013

The Little Green Data Book is a pocket-sized ready reference on key environmental data for over 200 countries. Key indicators are organized under the headings of agriculture, forestry, biodiversity, energy, emission and pollution, and water and sanitation.

Continental-scale temperature variability during the past two millennia

Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two millennia. The most coherent feature in nearly all of the regional temperature reconstructions is a long-term cooling trend, which ended late in the …

Oceans may explain explain slowing climate change: study

Climate change could get worse quickly if huge amounts of extra heat absorbed by the oceans are released back into the air, scientists said after unveiling new research showing that oceans have helped mitigate the effects of warming since 2000. Heat-trapping gases are being emitted into the atmosphere faster than …

Oceans may explain slowdown in climate change: study

Climate change could get worse quickly if huge amounts of extra heat absorbed by the oceans are released back into the air, scientists said after unveiling new research showing that oceans have helped mitigate the effects of warming since 2000. Heat-trapping gases are being emitted into the atmosphere faster than …

Combined effects of the North Atlantic Oscillation and the Arctic Oscillation on sea surface temperature in the Alborán Sea

We explored the possible effects of the North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) on interannual sea surface temperature (SST) variations in the Albora´n Sea, both separately and combined. The probability of observing mean annual SST values higher than average was related to NAO and AO values of the …

Intraseasonal atmospheric forcing effects on the mean state of ocean surface chlorophyll

Rectification of surface chlorophyll (Chl) concentration by the atmospheric intraseasonal variability is detected in a numerical biophysical ocean model when it is forced by composite Madden-Julian Oscillation (MJO) events. In addition to the shoaled mixed layer depth (MLD) previously reported, it is found that increased mean Chl by MJO forcing …

Adjustment of the natural ocean carbon cycle to negative emission rates

Carbon dioxide removal (CDR) is the only geoengineering technique that allows negative emissions and the reduction of anthropogenic carbon in the atmosphere. Since the time scales of the global carbon cycle are largely driven by the exchanges with the natural oceanic stocks, the implementation of CDR actions is anticipated to …

Sea urchin nickel 'trick' could be key to capturing carbon

Researchers say that the natural ability of sea urchins to absorb CO2 could be a model for an effective carbon capture and storage system. Newcastle University scientists discovered by chance that urchins use the metal nickel to turn carbon dioxide into shell. They say the technique can be harnessed to …

Ocean acidification causes ecosystem shifts via altered competitive interactions

Ocean acidification can alter competitive dynamics between species. Although calcareous species recruited and grew at similar rates to fleshy seaweeds in ambient and low pH conditions, at later stages, in low pH, they were rapidly overgrown. These results suggest that changes in competitive balance could indirectly lead to profound ecosystem …

Gulf Stream's induced sea level rise and variability along the U.S. mid-Atlantic coast

Recent studies indicate that the rates of sea level rise (SLR) along the U.S. mid-Atlantic coast have accelerated in recent decades, possibly due to a slowdown of the Atlantic Meridional Overturning Circulation (AMOC) and its upper branch, the Gulf Stream (GS). We analyzed the GS elevation gradient obtained from altimeter …

Norwegian Sea can hold 100 years of Norway's CO2 emissions: NPD

Norway could store 100 times its annual emissions of carbon dioxide under the Norwegian Sea to help fight climate change, adding to its even bigger potential under the North Sea, an official report showed on Friday. The findings are most relevant for natural gas finds such as the Sleipner field …

A scaling approach to project regional sea level rise and its uncertainties

Climate change causes global mean sea level to rise due to thermal expansion of seawater and loss of land ice from mountain glaciers, ice caps and ice sheets. Locally, sea level can strongly deviate from the global mean rise due to changes in wind and ocean currents. In addition, gravitational …

Genomic basis for coral resilience to climate change

Recent advances in DNA-sequencing technologies now allow for in-depth characterization of the genomic stress responses of many organisms beyond model taxa. They are especially appropriate for organisms such as reef-building corals, for which dramatic declines in abundance are expected to worsen as anthropogenic climate change intensifies. Different corals differ substantially …

Modulation of tropical ocean surface chlorophyll by the Madden–Julian Oscillation

The MJO modulation of sea surface chlorophyll-a (Chl) examined initially by Waliser et al. in Geophys Res Lett, (2005) is revisited with a significantly longer time-series of observations and a more systematic approach to characterizing the possible mechanisms underlying the MJO-Chl relationships. The MJO composite analysis of Chl and lead-lag …

Curiosity finds compounds that could aid life on Mars

The nearly 900kg Nasa’s Curiosity rover which touched down on the Red Planet’s Gale Grater on August 6 has “discovered hints of organic compounds which could aid primitive life,’’ mission scientists announced at a media briefing on Thursday, on the opening day of the American Geophysical Union meeting at San …

Australia creates world's largest marine reserves

Australia on Friday created the world's largest network of marine reserves, protecting a huge swathe of ocean environment despite claims it will devastate the fishing industry. The announcement, after years of planning and consultation, will significantly expand the protection of creatures such as the blue whale, green turtle, critically endangered …

Slowdown of the Walker circulation driven by tropical Indo-Pacific warming

Global mean sea surface temperature (SST) has risen steadily over the past century, but the overall pattern contains extensive and often uncertain spatial variations, with potentially important effects on regional precipitation. Observations suggest a slowdown of the zonal atmospheric overturning circulation above the tropical Pacific Ocean (the Walker circulation) over …

Nations fail to agree plan to protect seas around Antarctica

Major nations failed to reach agreement on Thursday to set up huge marine protected areas off Antarctica under a plan to step up conservation of creatures such as whales and penguins around the frozen continent. The 25-member Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) agreed, however, to …

Antarctic seas in the balance

Rich in fish, minerals and scientific potential, the seas around Antarctica are among the planet’s most pristine waters — but fishing vessels are already moving in. Next week, negotiators at a meeting of the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR, pronounced ‘cam-lar’) may try to contain …

Association of trace elements with various geochemical phases in the Indian sector of Southern Ocean during past 22,000 years and its palaeoceanographic implications

Adopting sequential extraction procedures, Ba, Cu, Mn, Ni, V and Zn concentrations were determined in the moderately reducible, organically bound, carbonateassociated and adsorbable fractions within a sediment core collected from the Indian sector of the Southern Ocean. The elemental abundances were studied with reference to the Last Glacial Maximum (LGM), …

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