A quarter of sharks and rays are threatened with being fished out of existence in the Northeast Atlantic, the International Union for Conservation of Nature (IUCN) said on Monday.

That is far above the threat level globally, reflecting the activity of fishing nations such as Spain, Portugal, France and Britain, the Swiss-based conservation group said.

A key question in the study of near term climate change is whether there is a causal connection between warming tropical sea surface temperatures (SSTs) and Atlantic hurricane activity. Such a connection would imply that the marked increase in Atlantic hurricane activity since the early 1990s is a harbinger of larger changes to come and that part of that increase could be attributed to human actions. However, the increase could also be a result of the warming of the Atlantic relative to other ocean basins, which is not expected to continue in the long term.

A new computer modeling study confirms that global warming is changing the salinity of seawater in the North Atlantic.

Reconstructions of ancient atmospheric carbon dioxide (CO2) variations help us better understand how the global carbon cycle and climate are linked. We compared CO2 variations on millennial time scales between 20,000 and 90,000 years ago with an Antarctic temperature proxy and records of abrupt climate change in the Northern Hemisphere.

About 350 to 400 North Atlantic right whales exist today. The survivors migrate along North America's East Coast between feeding grounds in the Gulf of Maine and wintering sites farther south

Atlantic tropical cyclones are getting stronger on average, with a 30-year trend that has been related to an increase in ocean temperatures over the Atlantic Ocean and elsewhere. Over the rest

The theory that global warming may be contributing to stronger hurricanes in the Atlantic over the past 30 years is bolstered by a new study led by a Florida State University researcher. The study is published in the Sept. 4 edition of the journal Nature.

The Saharan duststorms help sustain life over large regions of the North Atlantic Ocean, according to a latest study.

Liverpool University researchers found that plants are able to grow in these regions because of their ability to take advantage of iron minerals in Saharan duststorms.

This allows them to use organic or recycled material from dead or decaying plants when nutrients such as phosphorous, which is an essential component of DNA in the ocean are low.

Increasing tropospheric ozone levels over the past 150 years have led to a significant climate perturbation; the prediction of future trends in tropospheric ozone will require a full understanding of both its precursor emissions and its destruction processes. A large proportion of tropospheric ozone loss occurs in the tropical marine boundary layer and is thought to be driven primarily by high ozone photolysis rates in the presence of high concentrations of water vapour.

The dust that originates in the Sahara Desert, is lofted by windstorms which carries it west over the Atlantic. High levels of airborne dust reduce the amount of sunlight that reaches the ocean, lowering sea surface temperatures and, generally, hurricane probability.