Articles tagged with Atmospheric Carbon Dioxide
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A new study reveals that New England's trees are capturing more carbon from the atmosphere, driven by growing temperatures and increased precipitation. However, some forests are also becoming a source of CO2 due to invasive insects and climate-related stressors.
Researchers found that high CO2 concentrations in water make fish grow smaller, with a growth deficit of between five and ten percent. Fish living at less ideal temperatures and more CO2 experienced greater reductions in growth.
Scientists propose new soil carbon-persistence models to effectively draw down atmospheric carbon dioxide. The models focus on the interplay between time and space in soil carbon's changing molecular structure.
Researchers have found rising CO2 levels in Arctic Ocean water, with some areas showing slower increases. The study combined data from multiple cruises, providing a consistent dataset for future research.
A recent study found that seasonal sea ice growth and destruction increased biological productivity in the Southern Ocean, extracting carbon from the atmosphere and storing it in the deep ocean. This process helps explain a long-standing question about a 1,900-year pause in CO2 growth during the Antarctic Cold Reversal.
A new study found that seasonal growth and destruction of sea ice in the Southern Ocean enhances marine life present in the sea around Antarctica, sequestering carbon from the atmosphere. The researchers analyzed data from a period when atmospheric carbon dioxide levels plateaued at 240 ppm 14,600 years ago.
A new study found that seasonal growth and destruction of sea ice enhances marine life, drawing down carbon from the atmosphere and storing it in the deep ocean. This process could provide a critical resource for developing future climate change models.
The Arctic Ocean is projected to absorb 20% more CO2 by the end of the 21st century, leading to stronger ocean acidification. This increase in CO2 will negatively impact calcifying organisms such as mussels and corals, having serious consequences for the entire food chain.
The Arctic Ocean's capacity to remove carbon dioxide from the atmosphere has decreased due to rapid warming and sea-ice loss. This reduction will have significant implications for climate change, with the Canada Basin predicted to become a minimal carbon sink by 2030.
A new study emphasizes the need for international cooperation on CO2 removal to meet Paris Agreement targets. Countries must allocate quotas fairly and consider trading with countries that can fulfill their obligations, as only a handful can do so alone.
A new study found that meteorite crashes can create amino acids, the building blocks of proteins, by simulating ocean impact reactions. The discovery supports extraterrestrial delivery as a possible origin of life's essential molecules on Earth and Mars.
A recent study published in Nature shows that CO2 emissions from the African continent's rift system are destabilizing diamond deposits, which could have significant implications for the environment.
A new study suggests that the ocean's ability to absorb carbon dioxide will slow down as global emissions decrease, due to the slowed growth rate of atmospheric CO2. This could lead to a decrease in ocean carbon uptake and an increase in atmospheric CO2, contributing to additional warming.
Researchers estimate national fossil-fuel-derived CO2 emissions by observing carbon-14 in air samples. The new method uses a model of atmospheric transport to disentangle CO2 variations from natural sources, providing an independent and objective estimate.
Researchers estimate US fossil fuel CO2 emissions using atmospheric 14C measurements, finding higher emission rates compared to widely used inventories. The study suggests that independent validation of inventory-based estimates is possible through carbon isotope measurements.
Researchers have identified similarities and differences in ocean acidification on both coasts of North America, with the east coast experiencing a near-equilibrium pattern and the west coast showing enhanced acidification due to upwelling. The study highlights vulnerable hot spots, particularly in northern waters where rising carbon d...
The study found that NAU's Vulcan Project emissions estimate is the closest match to the new atmospheric-based approach, with an accuracy of 1.5%. The integrated approach combines multiple data sources, including local pollution reporting and fuel statistics, to provide a more detailed and accurate picture of US fossil fuel emissions.
Researchers have discovered that current CO2 levels surpass a 23-million-year-old record, suggesting unique greenhouse disruption. The findings imply that ecosystems and temperature might be more sensitive to smaller changes in CO2 than previously thought.
Research by the University of Exeter suggests that climate change could lead to sudden changes in British vegetation, particularly in regions with warmer and wetter conditions. This increase in plant growth is expected due to factors such as CO2 fertilization, but soil drying out can also cause rapid decreases in vegetation productivity.
Researchers found that maximum daily temperatures above 32.2 degrees Celsius cause tropical forests to lose stored carbon more quickly. The study highlights the importance of protecting tropical forests and stabilizing the Earth's climate.
A Texas A&M-led study analyzed ocean floor sediment cores to reveal the relationship between deep ocean oxygenation and atmospheric carbon dioxide levels over the past 50,000 years. The research found that enhanced storage of respired carbon in the deep ocean occurred during periods of low atmospheric CO2 concentrations.
Scientists measured a significant reduction in CO2 emissions in London during the pandemic, with daily reductions mirroring decreases in traffic flow. The lockdown's impact on air quality and potential changes in behaviors post-lockdown are also being studied.
A recent study published in Scientific Reports analyzed thousands of vertical measurements over airports and characterized CO2 variations over 34 major cities worldwide. The CONTRAIL program's aircraft data showed clear CO2 enhancements when wind comes from urban areas, indicating a relationship between CO2 variability and city emissions.
A recent study reveals that Cr(III) dominates in all sedimentary marine carbonates, contradicting previous theories on the oxidation of Earth's early atmosphere and ocean. The findings suggest that either microbial reduction or preferential uptake of Cr(III) by carbonate may be responsible for the absence of Cr(VI) in these rocks.
Plant breathing reduces Arctic land surface temperature, but rising CO2 accelerates warming by closing stomata and reducing transpiration. This study confirms the physiological forcing effect on Arctic climate system, estimating that 10% of greenhouse effect is caused by plant stomatal closure.
A new study suggests that increased rainfall in tropical regions will enhance soil respiration and decrease soil carbon stocks, leading to further intensification of global warming. This process could release significant amounts of CO2 into the atmosphere, exacerbating climate change.
A miniaturized carbon dioxide monitoring instrument based on non-dispersive infrared technology has been developed to observe carbon dioxide concentrations in the boundary layer. The instrument provided consistent results with conventional gas chromatography analyzers and revealed that CO2 concentration decreases with increasing altitude.
A new study suggests that volcanic activity played a direct role in triggering extreme climate change at the end of the Triassic period. The amount of carbon dioxide released into the atmosphere from these eruptions is comparable to the amount expected to be produced by all human activity in the 21st century.
Research suggests mature forests cannot absorb additional carbon as atmospheric CO2 concentrations increase. Carbon is quickly cycled through the soil and returned to the atmosphere, with only half being stored by trees and half by fungi and bacteria.
A new study from Woods Hole Oceanographic Institution reveals the ocean's biological carbon pump is more efficient than previously estimated, capturing twice as much carbon as thought. This discovery has significant implications for future climate assessments and policy.
Researchers discovered evidence of a 90-million-year-old rainforest near the South Pole, suggesting average temperatures were around 12 degrees Celsius. The finding challenges climate models and suggests higher carbon dioxide levels during the mid-Cretaceous period.
Scientists discovered that more carbon than expected stayed in the mantle, suggesting it was sequestered into lighter elements like silicon and oxygen in the core. Despite this, the majority of Earth's total carbon inventory still likely exists in the core.
A study revealed smaller-than-expected phytoplankton cells in the North Atlantic, suggesting a reduced ability to absorb carbon dioxide. This finding may impact carbon sequestration models and the planet's ecological health.
Severe flooding in the Midwest delayed crop growth by around two weeks and reduced maximum seasonal photosynthesis by 15 percent. This led to a 100 million metric ton reduction in net carbon uptake from June to July 2019.
Researchers found that increased CO2 levels reduced water loss and improved water use efficiency in trees during periods of drought and heat, but had no positive effect on carbon metabolism. The study suggests that the benefits of elevated CO2 are outweighed by the negative impacts of climate change.
A University of Oklahoma-led study reveals a decline in grasshopper numbers over the past two decades in a Kansas grassland preserve. The research identifies nutrient dilution as a key driver, caused by increased atmospheric CO2 levels, leading to declining plant quality and reduced sustenance for herbivores.
University of Rochester researchers found that the amount of methane emitted by humans is significantly higher than previously thought. By analyzing ancient air samples, they determined that reducing fossil fuel use can help curb climate change. The study suggests that anthropogenic methane emissions account for a larger portion of the...
A study published in PNAS reveals that Antarctic sea-ice played a crucial role in past climate transitions, storing extra carbon in the deep ocean and reducing atmospheric CO2 levels. Sea ice formation increases storage of carbon in the deep ocean, leading to a 30 ppm drawdown of atmospheric CO2.
The James Webb Space Telescope and other observatories will study the atmospheres of nearby, Earth-like exoplanets for signs of life. These exoplanets are thought to have reservoirs of compounds that could replenish their atmospheres.
A recent study found that fragmentation of large organic particles into small ones accounts for roughly half of particle loss in the ocean, controlling sequestration of sinking organic carbon. Sinking particles like plankton and detritus play a critical role in lowering atmospheric carbon dioxide concentration.
The Desarc-Maresanus project uses an alkalinization process to counteract ocean acidification and remove CO2 from the atmosphere. The study found that dispersing calcium hydroxide on the surface of the sea could make it possible to halt the trend of ocean acidification, making it a promising solution to combat climate change.
According to a new study, human activities have inadvertently increased plant growth globally, which absorbs carbon dioxide and cools the planet. This 'global greening' trend could be slowing down global warming by up to 0.2-0.25 degrees Celsius.
Tiny meteorites found in ancient soils suggest carbon dioxide made up 25-50 percent of Earth's atmosphere 2.7 billion years ago, indicating a warm planet. Lower nitrogen levels resulting from lower pressure would allow for both high CO2 and cool conditions.
A University of Tennessee microbiologist is leading a three-year study to understand how global warming affects peatlands and their vast carbon stores. The research aims to predict the impacts of warming on the complex network of microorganisms that cycle carbon and nutrients in peatlands.
A University of Washington team found that micrometeorites reacted with high levels of carbon dioxide on their journey to Earth, contradicting theories and evidence suggesting a nearly oxygen-free atmosphere. The study sheds light on the history of our planet's early days and could inform the search for life on other planets.
Researchers used radiocarbon analysis to determine the carbon age of non-photosynthetic orchids, revealing they obtain carbon from dead wood via saprotrophic fungi. This finding overturns traditional views and opens a new perspective on how these plants have become ecologically successful.
Researchers found that tundra warming significantly increases VOC release from plants, shifting composition towards more reactive hydrocarbons. This change in VOCs could impact plant-animal interactions and ecosystem resilience.
Researchers used ancient marine fossils to fingerprint temperature and carbon levels of seawater during the middle Miocene Climate Optimum. The study found that massive volcanic eruptions triggered a decline in ocean pH, leading to increased sea-levels and flooding.
Research on puffadder shysharks reveals that ocean acidification damages up to 25% of their denticles, limiting their swimming ability. The study also found that sharks have an acid-base regulatory mechanism to adapt to environmental conditions.
A study of 2.7 billion-year-old micrometeorites reveals that the early atmosphere likely contained between 25-50% CO2, leading to a cooler climate with evidence of glaciation. This finding suggests lower nitrogen levels in the ancient atmosphere, allowing for a modest greenhouse effect.
Boston University researchers have developed a biodegradable adhesive that can effectively stick to various surfaces, replacing traditional plastic adhesives. The adhesive's formula is easily adaptable to suit industrial and medical applications.
Researchers at Chiba University have improved estimates of ecosystem carbon mitigation, crucial for meeting the Paris Agreement's climate goals. By reconciling top-down and bottom-up approaches, they reduced discrepancies in flux estimations, providing a more accurate picture of terrestrial carbon sinks.
A research team has identified a new type of metal organic framework (MOF) that can selectively capture CO2 from flue gases, even in the presence of water. The discovery could lead to more efficient carbon dioxide removal from industrial emissions and help mitigate global climate change.
Researchers have discovered that evergreen tree species, such as holly and ivy, are more water-efficient under rising CO2 concentrations, potentially giving them a competitive edge over deciduous trees. This advantage is expected to be particularly pronounced in cooler climates like Ireland.
A new study suggests that volcanic eruptions triggered by tectonics led to the Great Oxidation Event, a significant increase in oxygen in Earth's atmosphere about 2.5 billion years ago. The research proposes that this event was also linked to a change in the composition of carbon isotopes in carbonate rock record.
Under future climate change, droughts are expected to become more frequent and severe, with a tripling of globally-averaged reductions in plant production by the end of this century. This could have devastating impacts on plant populations and the global carbon cycle.
A study simulates forest responses to projected climate changes using a model of plant physiology. Acclimation allows trees to adjust leaf area, photosynthetic capacity, and stand density to avoid stress, but its effectiveness varies with warming levels.
Researchers extracted pristine samples of carbon dioxide, methane, and other gases from 2 million-year-old ice cores in Antarctica. These 'snapshots' of prehistoric atmospheric conditions provide direct access to greenhouse gas measurements and shed light on the Mid-Pleistocene Transition, a period that saw significant changes in globa...
A study reveals a decline in forest carbon storage time, hindering forests' ability to absorb and re-emit carbon. Forests are crucial for regulating atmospheric carbon dioxide concentrations, and increased tree mortality is contributing to this decline.
Scientists at Chinese Academy of Sciences create highly stable and coke-resistant Ni SAC, overcoming in situ catalyst deactivation. The unique capacity for selective activation of CH4's first C-H bond explains the intrinsic coke resistance.