Articles tagged with Climate Modeling
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Researchers have identified human-induced changes in atmospheric moisture content using rigorous statistical methods. The study found that the atmosphere's water vapor content has increased by about 0.41 kg/m³ per decade since 1988, primarily due to human-caused greenhouse gas emissions.
A new NASA model simulates the strength of updrafts in severe storms, predicting more violent thunderstorms and tornadoes with a warmer climate. The study found that continents warm more than oceans, leading to stronger storms with fewer overall.
A call has been made for a Southern Hemisphere network of deep ocean moorings to monitor changes in the Southern Ocean circulation, which could influence global climate. The North Atlantic moored network provides measurements of the Gulf Stream, a significant feature in moderating European and North American climate.
Research suggests human activities are amplifying the impact of Sudden Oak Death, a forest-destroying disease caused by an invasive water mold. The study found that connected forests with high host species abundance have higher pathogen loads, while smaller, isolated forests have lower disease levels.
Peter J. Adams, an associate professor at Carnegie Mellon University, has been awarded a $900,000 research grant from the EPA to develop integrated models simulating air pollution from local to global scales. The study aims to improve understanding of particulate matter and its health impacts.
Researchers are working to understand regional climate change in North America, using models to predict impacts on agriculture and weather patterns. The Iowa State team has observed increased annual precipitation by about an inch over the past 30 years, which could be beneficial for Midwest agriculture.
Climate models predict the West Antarctic ice sheet and Arctic sea ice will collapse due to continued global warming. The researchers estimate that additional global warming of 1ºC above 2000 levels is likely to be 'dangerous'.
Research from Arizona State University highlights how global warming will drastically alter the world's fisheries, threatening human nutrition and species health. The study finds that changes in ocean temperatures and atmospheric conditions will affect fish stocks and habitats, leading to potential extinction of certain species.
A new report suggests that ocean warming may cause changes to the planet's rotation, potentially shortening the length of day by approximately 0.12 milliseconds. Additionally, researchers have found a link between seasonal seismicity in the Himalayas and fluid infiltration, which could modulate earthquake generation.
Climate model simulations indicate a robust increase in wind shear in the tropical Atlantic, which could counteract global warming's effects on hurricane intensity. The study suggests that increased wind shear may inhibit both hurricane development and intensification.
A new study predicts the disappearance of several existing climates by 2100 due to global warming, with novel climate zones emerging on up to 39% of the world's land surface area. The models also foresee significant impacts on ecosystems and biodiversity, highlighting the importance of understanding and coping with climate change.
Researchers at the University of Michigan have found that aerosols in clouds significantly impact climate models' ability to predict future temperature changes. The study compared two climate models with varying levels of aerosols and found divergent results, highlighting the need for more research to improve predictive capabilities.
The Model Coupling Toolkit enabled researchers to couple individual climate models into a single system, improving the accuracy of climate projections. The toolkit played a crucial role in preparing the Intergovernmental Panel on Climate Change's new report on climate change.
Researchers found that Antarctic temperatures did not increase as predicted by climate models, despite a global warming trend. The continent's vast size and limited data availability contribute to the discrepancy.
A new study has developed a generic global law to predict large-scale patterns in litter mass decay rates and nitrogen release from litter. The research found that the dominant drivers of nitrogen release were initial concentration and remaining mass of leaf and root litter.
A unique fishbone deforestation pattern in Rondonia, Brazil has been found to increase precipitation over deforested regions, resulting in increased vegetation growth. The study suggests that the pattern creates a localized low-pressure zone, leading to more cumulus clouds and rainfall.
A small-scale regional nuclear war could produce as many direct fatalities as all of World War II and disrupt the global climate for a decade or more. The environmental effects would be catastrophic and long-term, affecting regions far from the target areas or countries involved in the conflict.
A new climate model predicts that the Southern Ocean's absorption of heat and carbon dioxide will slow the rate of global warming. The ocean's ability to sequester heat and carbon dioxide could lead to sea level rise, but also change the chemistry of the water, making it less habitable for some marine organisms.
The U.S. will maintain a leadership role in science and technology thanks to Argonne's involvement in the SciDAC program. Projects focus on creating software and infrastructure for petascale supercomputers.
Scientists project that most of the world will face enhanced risks of heat waves, intense precipitation, and weather extremes by 2080-2099. The study used advanced climate models to analyze how weather extremes could change in the next century.
Climate scientists have detected human-induced climate change at a regional scale in Canada, southern Europe and China. The study uses four climate models to simulate climates over time periods, reproducing observed temperature changes that can't be explained by natural variability alone.
New research suggests that human-caused increases in greenhouse gases are directly linked to warming of tropical Atlantic and Pacific oceans, which contributes to hurricane intensity. The study used computer models to analyze SST changes in smaller hurricane formation regions.
Researchers at Oak Ridge National Laboratory have won five Department of Energy SciDAC awards to advance fundamental research in climate modeling, fusion energy sciences, and high-performance computing. The $60 million award will support leading-edge simulation computer programs over the next three to five years.
Scientists predict temperature increases of 1.6-6 degrees Celsius due to natural processes injecting more CO2 into the atmosphere, exceeding current models' 1.5-4.5 degree Celsius predictions.
A new model forecasts a significant decline in winter snowpack between now and 2100, affecting mountains in temperate zones. The Sierras, Cascades, and southern Rockies will be among the hardest hit, with some regions losing up to 64% of their current snowpack.
The study reveals that during periods of warm weather globally, the Pacific was cold and dry. Conversely, during cold weather elsewhere, the Pacific experienced warm and stormy conditions. This ancient climate data informs modern concerns about climate change in the Pacific region.
Researchers have discovered rivers beneath the ice in Antarctica, moving water hundreds of miles under the surface. The findings suggest that these lakes could support microbial life and potentially release large floods that could affect ocean circulation.
Regional climate model simulations indicate a significant increase in extreme precipitation events in Alpine regions and northern European locations above 45 degrees latitude. In Scandinavia, unusually strong events once expected to occur every century will now occur at 20-40 year intervals.
Researchers Bette Otto-Bliesner and Jonathan Overpeck base their findings on data from ancient coral reefs, ice cores, and other natural climate records. The Community Climate System Model (CCSM) suggests that Arctic warming could lead to sea level rise of up to 11 feet, while paleoclimate records indicate a rise of 13-20 feet.
A team of researchers recreated climatic conditions 130,000 years ago using a climate model, which showed that it can accurately simulate extreme conditions similar to those caused by man-made carbon dioxide emissions. This study provides more confidence in the reliability of future climate change projections.
Researchers from NASA and Columbia University reproduced an abrupt climate shift 8,200 years ago by simulating a massive freshwater flood into the North Atlantic Ocean. The study used GISS Model E-R to model the impact of the flood, which caused temperatures to drop several degrees in some areas.
A study published by Woods Hole Oceanographic Institution found that ocean temperatures in the Atlantic region were significantly warmer in the past than current levels, with estimates ranging from 91°F to 107°F. This finding contradicts current climate models and suggests that future warming may be more extreme than predicted.
Researchers used GISS Model E-R to simulate a massive freshwater flood into the North Atlantic around 8,200 years ago and found it had moderate effects on global temperatures. The study suggests that similar events may have occurred in the past and can inform our understanding of future climate scenarios.
Research on Martian aurorae reveals localized ultraviolet emissions near magnetic field lines. Air pollution reduction could exacerbate global warming due to increased solar radiation scattering. A new study detects potential oilfield brine leaks in Nueces Bay, Texas, using sediment resistivity and radium isotope analysis.
A study predicts that up to 90% of the Northern Hemisphere's permafrost will thaw by 2100, threatening ecosystems and climate change. Permafrost holds significant carbon emissions, which could accelerate climate change.
Land use changes in the Amazon region could exacerbate global warming due to deforestation, while agriculture in midlatitudes can counteract warming by up to 50%. The study utilized a global climate model to examine two scenarios from the Intergovernmental Panel on Climate Change and found contrasting results
Scientists suggest that deep roots, not just surface moisture, affect terrestrial heat and moisture processes in land-atmosphere interaction. This understanding could lead to more accurate climate models and better predictability.
Climate models project significant changes in global water availability by 2050, with varying trends across regions. The study highlights the complex relationship between climate and water resources, noting that warmer temperatures can lead to both increased and decreased water supply in different parts of the world.
Climate change is expected to shift the suitable ranges of blue oak and valley oak in California, with potential habitats shrinking by nearly half, posing a challenge for conservation planning. The study highlights the importance of regional climate models for accurately predicting species' responses to climate change.
A new climate model predicts more extreme temperatures throughout the US, with intense heat waves in the desert Southwest, and more storms along the Gulf Coast and Pacific Northwest. The model, which incorporates many climatic factors in unprecedented detail, suggests that these changes will disrupt national economy and infrastructure.
New research reveals that Mars' mid-latitude glaciers are similar to those on Earth, with features such as lineated valley fill and debris arcs. The findings suggest that Mars is experiencing ongoing climate shifts, allowing ice to leave the poles and accumulate at lower latitudes.
By mid-century, air quality in the Western United States is expected to decline due to climate change, with a doubling of stagnant days in the region. In contrast, the Midwest may see improved air quality thanks to increased cloud cover, which could offset warming temperatures.
Climate models predict a rapid increase in global temperatures and sea level rise of up to 30cm, with severe consequences for agriculture, ecosystems, and extreme weather events. The study also highlights the impact of human activity on the climate, fuelling global warming.
Climate models have significantly underestimated changes in air pressure, leading to a lower estimate of global warming's effect on weather patterns. Air pressure trends have contributed to temperature increases and rainfall changes in regions like Scotland, UK, and Siberia.
Researchers at the University of Illinois found that climate change affects the oceans' ability to store carbon dioxide. The best location for injecting CO2 into the deep ocean changes with climate change, with the Atlantic Ocean proving more effective than other locations.
A new study suggests that tropical organisms are highly intolerant to temperature changes, which could lead to mass extinctions. The research implies that climate change will have a devastating impact on the tropics, with organisms struggling to adapt to small temperature shifts.
Recent warming of the tropical troposphere has been confirmed by new observational estimates and state-of-the-art climate models. The warming trend is attributed to an 'amplification' effect caused by moist air rising and condensing into clouds, with temperature changes in the deep tropics larger than at the surface.
Urban areas affect climate, with satellite data showing changes in surface properties like thermal conductivity and vegetation cover. NASA satellites capture these changes, enabling improved simulation of urban effects in climate models.
The newly completed field tests show that the new approach in coupling models can be successful, producing similar temperature and wind outputs globally. The ESMF enables sharing and comparison of alternative scientific approaches from multiple sources, making it easier to develop realistic representations of the Earth as a system.
A study by Oxford Scientists found that climate envelope models are poor at predicting biodiversity changes, with only a 50% success rate in agreeing on direction of change. Using multiple models, however, can increase accuracy to over 75%. This approach may provide a solution for improving environmental policy making.
A peer-reviewed study published in Science finds a complex warming signal in world oceans over the past 40 years. The signal is of human origin and cannot be explained by natural variability or solar/volcanic forcing.
A study by Purdue University climatologist Noah Diffenbaugh suggests that vegetation changes can significantly affect extreme weather events. In regions like California and the Great Basin, vegetation feedbacks may lead to more or fewer extreme events depending on the location.
A study by Lee Hannah predicts that climate change and land-use changes will increase the risk of extinction for most protea species, with up to 15% expected to lose their range entirely. The Cape region's protected areas may offer lessons for global conservation efforts.
Researchers have made significant progress in understanding the causes of recent climate change, attributing warming to human influences. By analyzing climate models and observational records, scientists have identified key drivers of temperature changes, including greenhouse gases and solar irradiance.
NASA's Mars Exploration Rovers and the Cassini-Huygens Mission will be discussed, highlighting new discoveries and future exploration plans. The AAAS annual meeting also features presentations on climate change, urban decision-making, and revolutionary engine architectures.
High school and college students can now simulate Earth's climate changes using NASA's EdGCM model, which includes a 3-D climate computer model and scientific visualization tools. The model allows students to conduct experiments identical to those run by scientists, promoting hands-on learning about climate science.
Researchers at the University of Illinois have developed a portable monitoring system to evaluate emission sources from traditional wood-burning cookstoves. The study aims to improve human health and climate modeling by characterizing emissions under various burning conditions.
The University of Victoria has received a new vector-based supercomputer to aid in climate research. The machine will enable faster climate simulations and models that represent economic, social, technological, and biogeochemical factors. This is the first such computer in Western Canada, which can speed up simulations by a factor of 20.
A study by Saint Louis University researchers reveals a region in the Midwestern United States where summer daytime temperatures are not expected to rise as high as elsewhere, contrary to previous climate projections. The finding suggests that the impact of global warming on this region may be more complex than previously thought.
Researchers assess the accuracy of ocean general circulation models in representing deep convection in the Labrador Sea. They found that while one model simulated data more faithfully, it still suffered from problems, and further study is needed to improve understanding of this process.