How Carbon Emissions Are Acidifying Oceans and Threatening Marine Life
A new study published in Science Advances by Jens Müller and Nicolas Grube from the Institute of Biogeochemistry and Pollutant Dynamics at ETH Zurich has highlighted the growing depths of ocean acidification. Using a 3D model of the world’s oceans, the researchers examined how carbon emissions since the industrial age have impacted marine chemistry. The findings show that by 2014, acidification had reached an average depth of 1,000 metres, with some regions showing effects as deep as 1,500 metres, according to reports.
Impact of Carbon Emissions on Ocean Chemistry
As per the study, increasing atmospheric carbon dioxide has not only warmed the oceans but also altered their chemical composition. This process, akin to the mechanism behind carbonated beverages tasting acidic, has led to rising acidification levels in seawater. Critical indicators like proton concentrations, pH levels and aragonite saturation states were used to simulate changes in the ocean’s CO2 levels from 1800 to 2014.
The research, as per sources, indicates that regions influenced by ocean currents, such as the Atlantic meridional overturning current, showed more significant acidification at greater depths. This trend poses a risk to marine life, particularly organisms like pteropods, whose calcium-based shells are highly vulnerable in acidic environments.
Ecological Consequences and Future Risks
It has been noted in several reports that the deeper penetration of acidification could adversely impact marine ecosystems. Corals, already under threat from rising temperatures, face additional challenges due to chemical changes in their habitats. Reports suggest that the scale and intensity of acidification could disrupt food chains and biodiversity in deeper ocean layers.
The findings underscore the necessity of addressing carbon emissions to mitigate further harm to marine environments. The researchers’ work provides critical insights into the long-term implications of industrialisation on global ocean systems, as highlighted in the journal.
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A volcanic fissure has emerged near Grindavík on Iceland’s Reykjanes Peninsula after a series of strong earthquakes. Lava has breached the town’s defence barriers. The Icelandic Meteorological Office (IMO) has warned that the fissure may continue to expand. The eruption began along the Sundhnúkur crater row early in the morning. By 9:45 a.m. local time, a fissure stretching nearly 1,200 metres had opened north of Grindavík. The crack is moving southward. Officials have raised the hazard level to the highest risk category.
Evacuations and Road Closures
According to the IMO, a second fissure has appeared inside Grindavík’s protective barriers. Authorities have evacuated the town along with the Blue Lagoon spa. Roads in and out of the area have been shut. Some residents have refused to leave. Local media outlet Visir has reported that emergency services remain on high alert.
Impact of Volcanic Gas
Weather forecasts indicate that volcanic gas will be carried northeastward towards Reykjavík. The capital is located about 40 kilometres away. The IMO has stated that by tomorrow morning, changing wind patterns may direct the gas southwest and eastward. Residents have been told to remain indoors as much as possible while closely monitoring air quality updates. Reykjanes Peninsula has experienced about 11 eruptions since 2021. Eight have occurred along the Sundhnúkur crater row since last year. Scientists continue to monitor the situation closely. Authorities have urged people to avoid the affected region.
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Astronomers have released new images of planets within the HR 8799 and 51 Eridani star systems. The James Webb Space Telescope (JWST) was used in a way that was different from standard procedures to achieve these results. Capturing direct images of exoplanets is challenging due to the brightness of host stars, which often obscures planetary details. To allow more light through, researchers adjusted JWST’s coronagraphs. This helps in enhancing the visibility of these distant worlds. This adjustment provided clearer insights into planetary atmospheres and their compositions.
Unconventional Use of JWST’s Coronagraphs
According to a study published in The Astrophysical Journal Letters, lead author William Balmer, a Ph.D. candidate at Johns Hopkins University, explained to Space.com that a thinner part of the coronagraph mask was used. This allowed more starlight to diffract, reducing the risk of completely obscuring planets. Coronagraphs typically block starlight to reveal faint celestial bodies, but this modification provided a balance between removing excessive glare and preserving planetary details.
Key Discoveries and Observations
The JWST’s mid-infrared imaging captured HR 8799 at 4.6 microns. It is a wavelength that is mainly blocked by Earth’s atmosphere. Balmer stated that previous ground-based attempts had failed, demonstrating JWST’s stability in detecting exoplanets. Observations at 4.3 microns were also conducted. This revealed the presence of carbon dioxide. It is a very important step in determining the planetary formation processes. The detected carbon dioxide levels suggested that these planets likely formed through core accretion, gathering heavy elements over time.
Future Research and Expanding Studies
There are many research planned to study the four additional planetary systems. Balmer’s team has been allocated more JWST observation time to confirm whether similar gas giants formed through core accretion. This could offer more insights into the stability of planetary systems and potential habitability of smaller, unseen planets.
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