Articles tagged with Atmospheric Carbon Dioxide
An international team of scientists discovered a possible cause for irregularities in climate evolution: enhanced volcanic activity induced by falling sea levels. This study found that reduced pressure on the seafloor led to increased lava and carbon dioxide emissions, stabilizing atmospheric CO2 concentrations during glacial periods.
Researchers developed a mathematical model to reconcile temperature estimates from global climate models and paleoclimate records. They found that higher temperature ranges, up to 6 degrees Celsius, may be possible when long-term warming patterns are considered.
The AAS Special Issue on the Chinese Carbon Budget Program presents research on accurate estimation of national GHG emissions, terrestrial carbon budget, and potential for increasing carbon sinks. Eight papers cover various topics, including aerosols, airborne observations, and CO2 monitoring from space.
The University of Oklahoma has secured an $161 million NASA contract for a groundbreaking Earth science mission. The Geostationary Carbon Cycle Observatory (GeoCarb) will monitor plant health and vegetation stress across the Americas, as well as probe carbon dioxide and methane exchange processes in the atmosphere.
A new study by researchers at the Alfred Wegener Institute and University of Cardiff reveals that gradually rising CO2 concentrations can trigger rapid warming and sudden climate changes. The study confirms past phenomena observed in Greenland ice cores, known as Dansgaard-Oeschger events.
A new study reveals that rising CO2 levels reached a tipping point, triggering sudden temperature shifts of up to 15°C in the Northern Hemisphere during ice age periods. The findings add to evidence suggesting that gradual climate changes can lead to abrupt surprises.
A new study by scientists from the Universities of Oxford, Montana, and the US Forest Service highlights novel approaches to tackling deforestation. The team built a multi-scale model of deforestation on Borneo's island using machine learning algorithms, predicting future deforestation risk faced by remaining forests.
Scientists will fly nine planes over Alaska and northwest Canada to gather data on changing Arctic ecosystems. The ABoVE field campaign aims to understand how environmental changes affect the local environment and beyond.
Researchers found that brown carbon released into the air from wildfires is more likely to travel to the upper levels of the atmosphere, where it can cool or warm the air. Brown carbon appears more likely than black carbon to have a greater impact on climate due to its altitude.
Researchers discover that managing coastal ecosystems can help mitigate global warming by protecting and restoring natural carbon sinks like wetlands. Better management of catchment-level processes, such as nutrient inputs and hydrology, can increase blue carbon sequestration.
A new study reveals that a specific type of deep-sea bacteria, SAR202, plays a crucial role in breaking down 'recalcitrant' forms of dissolved organic matter (DOM) in the ocean. This process helps to sequester massive amounts of carbon, which can persist for thousands of years.
Giant larvaceans play a significant role in moving carbon from the upper to deep sea through their 'houses,' which filter tiny particles. Laser technology enables researchers to visualize chambers and passageways inside these structures, revealing higher filtration rates than previously estimated.
A study by Kansas State University ecologists found that leaf litter decomposition rates are less than half of what the metabolic theory predicts, even at higher temperatures. This suggests that warmer temperatures may not accelerate decomposition as much as expected.
A new study found that tropical forests will accelerate their growth in response to increased rainfall, which could lead to greater carbon sequestration. However, the authors caution that climate change still poses a threat to these ecosystems in the short term.
A Rice University study found that fossilized organic carbon could have been deeply buried in the mantle starting around 2.4 billion years ago, during a critical period known as the great oxidation event. The researchers discovered that the chemical composition of subducting crustal rock plays a crucial role in determining whether carb...
New research from the University of Montana suggests that climate-change driven increases in rainfall in warm, wet forests will cause increased plant growth. This is a positive outcome for reducing global carbon dioxide levels, as it removes CO2 from the atmosphere through plant growth.
Researchers found that mushrooms can act as indicators of lawn responses to rising carbon dioxide levels. The study found that temperature and increased CO2 concentrations affected grass competition, leading to changes in mushroom carbon isotopes.
Researchers developed a model suggesting early oceans were acidic, with pH between 6.0 and 7.5, conducive to primitive life's existence. Higher CO2 levels controlled ocean acidity, influencing chemical weathering and ion fluxes.
Research at UC Merced found a chemical record of global photosynthesis spanning hundreds of years, indicating a significant increase in plant growth since the industrial revolution. The findings suggest that rising atmospheric CO2 levels and climate change may be driving this trend.
New research confirms that global photosynthesis is stable for hundreds of years before industrial revolution, but grows rapidly with increased CO2 levels. The findings affirm estimates used in climate change models and suggest that nature's brakes are not enough to counter human emissions.
New research suggests that carbon dioxide concentrations will head towards values not seen since the Triassic period due to human activities. The study finds that if humanity fails to tackle rising CO2, by AD 2250 CO2 levels could reach 2000 ppm, potentially unprecedented in 420 million years.
A recent study published in Nature Communications reveals that northern oceans pumped CO2 into the atmosphere during past natural climate changes, contradicting previous assumptions of ocean's role. The research found that areas in Norwegian Sea released more greenhouse gas into the air during severe cooling periods.
Researchers found that atmospheric CO2 concentrations remained stable around 190 ppm during ice ages, preventing extreme cooling. This suggests a 'thermostat' mechanism maintained habitable temperatures, with slower-growing organisms reducing carbon in soils and oceans.
A new study finds that colder climates lead to lower atmospheric CO2 levels and increased carbon sequestration in the deep ocean. Deep-sea corals reveal that phytoplankton efficiency is higher during colder periods, reducing nutrients in the surface Southern Ocean, leading to more efficient carbon locking away.
Researchers at Indiana University have engineered a molecule that harnesses sunlight to convert carbon dioxide into a carbon-neutral fuel source. The new molecule uses nanographene to absorb light and triggers a highly efficient reaction to produce carbon monoxide, a versatile raw material in industrial processes.
Researchers have made discoveries about the behavior of carbonate species at saltwater surfaces, finding that the more highly charged carbonate ion was more abundant than expected. This raises questions about the global carbon cycle and potential applications in carbon sequestration and biology.
Material scientists at ETH Zurich have developed a method to manufacture ceramics without heat, using calcium carbonate nanoparticles compacted with water. The resulting material is stronger than concrete and as stiff as stone, with potential applications in sustainable construction and energy storage.
The task force proposes strategies to recycle carbon dioxide and remove large amounts of carbon dioxide from the atmosphere, complementing carbon-free approaches like electrification. These approaches aim to produce an overall emissions reduction of at least one billion tons of carbon dioxide per year.
Ocean absorbing more carbon dioxide reduces atmospheric greenhouse gas levels, but promotes acidification in marine organisms. A study by UC Santa Barbara geographer Timothy DeVries and colleagues found that a slowdown of the ocean's overturning circulation is likely the cause.
Researchers have identified a new type of solar event and dated it to 5480 BC using carbon-14 levels in tree rings. The team proposes causes for the event, extending knowledge of the sun's behavior and its effects on Earth. The study provides new insights into the sun's activity during the mid-Holocene period.
A new study published in Nature Communications reveals that wetlands store a significant amount of carbon, with freshwater inland wetlands holding nearly 10 times more carbon than tidal saltwater sites. The research highlights the importance of protecting wetlands from human activity to prevent climate change.
Researchers at McGill University suggest that a link between global climate change and dramatic changes in ocean circulation can explain the formation of Antarctica's ice sheets. This new theory highlights the complexity of climate change and the impact of ocean circulation patterns on global temperatures.
A new study suggests that land-use change may be responsible for higher CO2 emissions than previously thought, emphasizing the need for reforestation efforts to combat climate change. The research highlights the crucial role of forests, grasslands, and croplands in absorbing carbon dioxide from the atmosphere.
A Florida State University researcher investigated how carbon moves from the ocean surface to greater depths and remains there for hundreds of years. The study found that certain areas of the sea, particularly fronts where temperature or salinity changes, act as giant conduits moving carbon to deeper depths.
The new inverse algorithm stabilizes CO2 retrieval iterations using Levenberg-Marquardt parameters and a scale factor. Preliminary validations show improved quality of the MDNM-based retrieval results.
A recent study by University of Exeter researchers found that temperature fluctuations drive the year-to-year variability of global land-based carbon sinks. Locally, however, water availability is the dominant factor in determining the success of carbon sinks.
Researchers found a bacterium can convert CO2 to CO, opening up new avenues for recycling greenhouse gas into biofuels. The discovery establishes nitrogenase enzyme as template for energy-efficient and environmentally-friendly fuel production.
A new study links rapid increase in sediment burial of carbon-rich organic matter to the surge in atmospheric oxygen during the Cambrian explosion. This process prevented dead plant material from burning and allowed oxygen to build up. Fossil fuel formation played a crucial role in supporting advanced animal life on Earth.
Researchers developed a cloud-screening scheme for the TANSAT satellite, utilizing radiance data from another satellite to improve performance. The new scheme shows improved results compared to existing methods and is more efficient for sensors with limited channels.
A recent study suggests that carbon stored in deep northern peatlands is less susceptible to warming, which could be beneficial for the environment. The researchers found that surface peat did emit more methane gas when warmed, but deep peat remained stable and did not release additional greenhouse gases.
Researchers from Berkeley Lab will present various talks on climate modeling challenges, permafrost, induced seismicity and drought sensitivity in mountainous watersheds. They aim to map regions sensitive to drought conditions using historical data and identify environmental controls.
The University of Oklahoma will monitor plant health and vegetation stress throughout the Americas using a commercial communications satellite. The mission aims to examine natural sources and processes that control carbon dioxide, carbon monoxide, and methane in the atmosphere.
Researchers found that measuring carbon isotope 13C can identify distortion in radiocarbon age of materials caused by fossil fuel emissions. This method allows for accurate age determination, even when atmospheric CO2 levels are high.
A new study predicts that climate change will release 55 trillion kilograms of carbon from the soil by mid-century, exacerbating global warming. The impact on the soil's storage capacity is expected to be equivalent to adding another industrialized country like the US to the planet.
A recent study published in Environmental Science & Technology Letters found that carbon dioxide injected into basalt transformed into solid rock within two years. This process has the potential to permanently sequester large amounts of carbon on a global scale, offering a solution to reduce global emissions.
A new study calculates climate sensitivity using Earth's paleoclimate data, finding that warm climates are more sensitive to CO2 changes. The researchers project a 5.9°C warming by 2100, overlapping with IPCC estimates and emphasizing the need for immediate greenhouse gas emission reductions.
Scientists discover that rising CO2 levels have boosted terrestrial carbon uptake, slowing the growth rate of atmospheric CO2. The increase in carbon absorption is attributed to enhanced photosynthesis and plant respiration, particularly in tropical and high-latitude ecosystems.
A new biochar model suggests using a bioenergy-biochar system to remove carbon dioxide from the atmosphere, potentially becoming a viable option for climate change mitigation. This approach involves charring organic material and producing carbon-sequestering biochar that can be used as fertilizer and improve crop production.
Researchers develop fluorine-containing MOF for selective carbon dioxide capture, suitable for air and industrial applications. The material's unique geometry allows for efficient trapping of CO2 even at very low concentrations.
Experts from Cardiff University propose that deep ocean storage of carbon dioxide may be responsible for the planet's 100,000-year ice age cycle. By analyzing tiny fossil remains, researchers found more CO2 stored in the oceans during ice ages at regular intervals every 100,000 years.
At Syowa Station, a daily mean CO2 concentration of 400.06 ppm was recorded on May 14, 2016, surpassing the previous threshold. This observation highlights the impact of human activities on the Antarctic region, contributing to global warming.
Researchers reconstructed ancient atmospheric carbon dioxide record and found fluctuations projected for the 21st century. The study highlights the potential impact of losing tropical forests on climate, with potential thresholds leading to rapid and irreversible biological change.
Scientists have discovered silicate glass spherules at the Paleocene-Eocene boundary that suggest a comet impact occurred during this time period. The results provide direct evidence for an extraterrestrial impact on Earth, which may have contributed to the observed global warming event.
Researchers found evidence of a comet strike in sediment from the Paleocene-Eocene Thermal Maximum (PETM), a rapid warming of the Earth caused by an accumulation of atmospheric carbon dioxide. The discovery provides insight into the sequence of events leading to global warming.
Microbiologist Kristen DeAngelis receives $2.5 million grant from US Department of Energy to study soil microbes' impact on carbon cycle. The research aims to improve understanding of how climate change affects soil carbon storage and develop new methods for modeling microbial contributions to global carbon cycling.
Ancient leaves reveal that carbon dioxide levels increased dramatically as the ice sheet began to deteriorate, raising questions about its stability today. The study found a rapid decline in ice extent over a short period, similar to modern times, where CO2 concentrations are rising.
Researchers have compiled a 30-year data set to construct the first ice core-based record of atmospheric oxygen concentrations spanning 800,000 years. The study shows that atmospheric oxygen has declined by 0.7 percent relative to current concentrations, primarily due to fossil fuel burning.
A recent study found increased ocean acidification in the northeast Pacific Ocean, primarily caused by anthropogenic carbon dioxide. The region's pH has dropped by 0.002 units per year, making it harder for marine species to build shells.
A new study finds that while elevated CO2 concentrations boost plant growth under ideal conditions, drought will outweigh those benefits and cause yield losses sooner than anticipated. Soybeans grown in a carbon dioxide-rich atmosphere used more water under hot and dry conditions, leading to reduced yields.
A study by the University of Washington reveals that plants' reduced water needs due to climate change could halve the extent of droughts. This shift in plant water use changes long-term drought estimates, impacting future water supplies and ecosystem stresses.