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The acid effect on our oceans and economies

Early last week, a study from a group of universities, research centres and environmental groups in the United States pointed out a broadening danger for commercial fisheries in 15 states, 14 of them on the Atlantic coast. The study, by scientists with the University of California at Davis, Duke University, the Natural Resources Defence Council […]

3-3-15 Fun Time with Porpoise and Sea Lions

Tuesday, March 3rd...today was a great encounter, not far from Lime Kiln, with Dall's porpoise while out with Capt. Jim...one of the best Dall's encounters in a long, long time......then we headed up to Kelp Reef marker to see if there...Show More Summary

For Hoff Yeti Crabs Food, Sex, and Birth Determine Living Space At Vents  

Within just a few short centimeters the temperature drops from 350?C to -1.5?C (692 to 29.3?F). At 2.6 kilometers deep in the Antarctic Ocean lies the East Scotia Ridge (ESR) dotted with hydrothermal vents. Here, in this unique spot the world’s coldest ocean is in contact with one of the seafloor’s hottest environments. Life residing at hostile vents […]

Trends and drivers in global surface ocean pH over the past 3 decades (update)

We report global long-term trends in surface ocean pH using a new pH data set computed by combining fCO2 observations from the Surface Ocean CO2 Atlas (SOCAT) version 2 with surface alkalinity estimates based on temperature and salinity. Trends were determined over the periods 1981–2011 and 1991–2011 for a set of 17 biomes using a […]

Session on ocean acidification, air-sea exchange and the biological pump at the 25th Goldschmidt Conference, Prague, 16-21 August 2015

Conveners: Steven Emerson, and Doug Wallace Abstract submission is now open until April 2nd, 2015. The pCO2 content of the atmosphere is regulated by exchange with the upper ocean via the solubility and biological pumps. About one quarter of the anthropogenic CO2 introduced to the atmosphere is ultimately stored in the ocean causing a decrease […]

Session on ocean acidification (multiple stressors context) at the 25th Goldschmidt Conference, Prague, 16-21 August 2015

The session is entitled “Anthropogenic Impacts on Coastal Geochemistry: Acidification, Eutrophication and Hypoxia”. The oceans’ coastal zones face strong and rapid changes, forced by a combination of multiple human-driven stressors, including eutrophication and anthropogenic CO2-induced changes. Show More Summary

Juvenile pen shells (Pinna nobilis) tolerate acidification but are vulnerable to warming

In the course of this century, rising anthropogenic CO2 emissions will likely cause a decrease in ocean pH, know as ocean acidification, together with an increase of water temperature. Only in the last years, studies have focused on synergetic effects of both stressors on marine invertebrates, particularly on early life stages considered more vulnerable. Disparate […]

Decreased calcification in the Southern Ocean over the satellite record

Widespread ocean acidification is occurring as the ocean absorbs anthropogenic carbon dioxide from the atmosphere, threatening marine ecosystems, particularly the calcifying plankton that provide the base of the marine food chain and play a key role within the global carbon cycle. Show More Summary

Ocean warming–acidification synergism undermines dissolved organic matter assembly

Understanding the influence of synergisms on natural processes is a critical step toward determining the full-extent of anthropogenic stressors. As carbon emissions continue unabated, two major stressors—warming and acidification—threaten marine systems on several scales. Show More Summary

Occurrence of aragonite corrosive water in the North Yellow Sea, near the Yalu River estuary, during a summer flood

To understand seawater CaCO3 saturation state (?arag for aragonite and ?cal for calcite) dynamics in river-dominated ocean margins, we investigated the carbonate system and ancillary parameters in the North Yellow Sea, near the Yalu River estuary, during and after a summer flood (August and September 2013, respectively). During the flood period, nearshore ?arag ranged from […]

Potential and limitations of finite element modelling in assessing structural integrity of coralline algae under future global change

Coralline algae are important habitat formers found on all rocky shores. While the impact of future ocean acidification on the physiological performance of the species has been well studied, little research has focussed on potential changes in structural integrity in response to climate change. A previous study using 2-D Finite Element Analysis (FEA), suggested increased […]

Physio-ecological responses of Patagonian coastal marine phytoplankton in a scenario of global change: Role of acidification, nutrients and solar UVR

The aim of our study was to experimentally determine the future combined effects of solar UVR (280–400 nm), nutrients enrichment and acidification on a natural phytoplankton community (late phase of the bloom) of the Chubut River estuary (Patagonia, Argentina). We exposed the community to two radiation conditions (i.e., with and without UVR) under a future […]

Physiological and ecological performance differs in four coral taxa at a volcanic carbon dioxide seep

Around volcanic carbon dioxide (CO2) seeps in Papua New Guinea, partial pressures of CO2 (pCO2) approximate those as predicted for the end of this century, and coral communities have low diversity and low structural complexity. To assess the mechanisms for such community shifts in response to ocean acidification, we examined the physiological performance of two […]

Scientists to deploy ocean cameras as acidification fears mount

Climate scientists are looking for a new perspective on the increasingly acidic oceans through a suite of satellites 700 km out in space, watching over parts of the seas that research ships cannot reach. They report in the journal Environmental Science and Technology that thermal cameras could measure ocean temperatures, while microwave sensors could measure […]

Ocean acidification changing key organisms which form the basis of the marine food chain, say Swansea University researchers

OCEANS and marine life face a more uncertain future because ocean acidification, caused by climate change, is altering the growth of the organisms which are the basis of the entire food chain at sea. That is the finding of a Swansea University-led research team. Ocean acidification has been described as “the other CO2 problem”, and is also caused […]

Ocean acidification with (de)eutrophication will alter future phytoplankton growth and succession

Human activity causes ocean acidification (OA) though the dissolution of anthropogenically generated CO2 into seawater, and eutrophication through the addition of inorganic nutrients. Eutrophication increases the phytoplankton biomass...Show More Summary

Where are the “hotspots” for ocean acidification?

By now, coastal communities are asking: “Who’ll be hit next by ocean acidification? And what can people do?” Until now, we haven’t known where exactly in the United States ocean acidification is most likely to affect marine ecosystems, and where the effects on people could be greatest. (Fortunately, several forward-thinking states are already studying the […]

Spatial and temporal pCO2 marine monitoring near Panarea Island (Italy) using multiple low-cost GasPro sensors

The present paper describes the GasPro probe, a small, low-cost unit for in situ, continuous pCO2 monitoring. Laboratory tests defining its performance characteristics are reported, as are the results from a 60 h water-column deployment of 20 such units near a natural CO2 seep site off the coast of Panarea Island (Italy). The spatial-temporal evolution […]

A natural strategy against climate change

This paper presents a short description of the quantitatively most important applications of enhanced weathering of olivine to counter climate change and ocean acidification. CO2 is captured by the weathering of basic silicates, in particular olivine or its hydrated equivalent serpentine. During the whole history of the Earth, weathering has played the major role in […]

Effects of CO2 and seawater acidification on the early stages of Saccharina japonica development

In this paper, we demonstrated that ocean acidification (OA) had significant negative effects on the microscopic development of Saccharina japonica in a short-term exposure experiment under a range of light conditions. Under elevated CO2, the alga showed a significant reduction in meiospore germination, fecundity, and reproductive success. Show More Summary

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