CT scans of coral skeletons reveal ocean acidity increases reef erosion

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For coral reefs to persist, rates of reef construction must exceed reef breakdown. Prior research has largely focused on the negative impacts of ocean acidification on reef growth, but new research demonstrates that lower ocean pH also enhances reef breakdown: a double-whammy for coral reefs in a changing climate....

Biology trumps chemistry in open ocean: How phytoplankton assimilate limited concentrations of phosphorus

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Scientists laid out a new framework based on in situ observations that will allow them to describe and understand how phytoplankton assimilate limited concentrations of phosphorus, a key nutrient, in the ocean in ways that better reflect what is actually occurring in the marine environment. This is important because nutrient uptake is a property of ocean biogeochemistry, and in many regions controls carbon dioxide fixation, which ultimately can play a role in mitigating climate change....

Avoiding ecosystem collapse: Experts Weigh in

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From coral reefs to prairie grasslands, some of the world's most iconic habitats are susceptible to sudden collapse due to seemingly minor events. A classic example: the decimation of kelp forests when a decline of otter predation unleashes urchin population explosions. Three studies hold the promise of helping resource managers predict, avoid, and reverse the tipping points that lead to degraded habitats, economic losses, and social upheaval....

Underwater robot sheds new light on thick, deformed, Antarctic sea ice

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The first detailed, high-resolution 3-D maps of Antarctic sea ice have been developed using an underwater robot. Scientists say the new technology provides accurate ice thickness measurements from areas that were previously too difficult to access....

Fiddler crab migrating north, possibly from climate change

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The fiddler crab, Uca pugnax, has migrated nearly 50 miles north of its supposed natural range along the US East Coast. This may be another sign of climate change, experts say....

Salinity counts when it comes to sea level

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Using ocean observations and a large suite of climate models, scientists have found that long-term salinity changes have a stronger influence on regional sea level changes than previously thought....

Mediterranean meteorological tide has increased by over a millimeter a year since 1989

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A new database provides data on sea level variation due to atmospheric changes in the south of Europe between 1948 and 2009. Over the last two decades sea levels have increased in the Mediterranean basin....

What is geocaching?

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Geocaching is an outdoor treasure-hunting activity that uses GPS-enabled devices.


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As CO2 acidifies oceans, scientists develop new way to measure effect on marine ecosystems

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Due to human-made emissions, the CO2 content of the oceans has increased dramatically and is gradually acidifying the surface waters. To understand how ocean acidification is affecting large marine areas, scientists studied a 5,000 km long strip of ocean and developed a new way to simultaneously assess overall calcification rates of coral reefs and open sea plankton over a whole oceanic basin, based on variations in surface water chemistry. This is the first study that demonstrates the feasibility of quantifying this type of information on an oceanic basin scale....

What is a geographic information system?

This item was filled under Facts, Geology, Observations, Ocean Management
GIS is a computer system that captures, stores, checks, and displays information related to positions on Earth’s surface.

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