Articles tagged with Climate Variability
Researchers found that the Asian summer monsoon's strengthening played a key role in Homo sapiens' dispersal from Africa to East Asia during the last interglacial period. The study integrated paleoanthropological data with high-resolution reconstructions of the monsoon, suggesting a link between climate change and human migration.
Researchers from Xi'an Jiaotong-Liverpool University developed a system to assess water quality challenges in Suzhou, China. The study found that the city's water capacity has increased since 2001 due to effective water management measures.
Researchers develop a mathematical model that analyzes the future survival of plants in a changing climate by studying how far wind can carry seeds. The model provides fast and reliable predictions of seed movement, considering factors like seed type, plant height, and wind speed.
Researchers propose a new approach to measure global warming, combining the last ten years of temperature observations with projections for the next decade. The current level of global warming is around 1.26°C, with an uncertainty range of 1.13°C to 1.43°C.
Researchers have reconstructed a global history of water over the past 2,000 years, showing that the global water cycle has changed during periods of higher and lower temperatures. The study found that when global temperature is higher, rain and other environmental waters become more isotopically heavy.
Researchers used a well-tested climate model to depict changes in natural climate variability during the last peak glacial period. The study found that internal mechanisms, such as variations in salinity and temperature, drove the multi-centennial climate variability, resulting in fluctuations in sea ice extent and Greenland temperatures.
Two new studies suggest that human-induced climate change is now a dominant factor in shaping El Niño patterns. The research reveals that the 'Walker switch' mechanism, triggered by changes in solar radiation, instigates swift adjustments in sea-surface temperatures, influencing climate patterns globally.
A new study found that multiyear La Niña events have become more common over the last 100 years, with warming in the western Pacific Ocean being a key factor. The study suggests that long-lasting La Niñas will exacerbate adverse impacts on communities around the globe.
A new laser-based sampling system allows for higher depth resolution, enabling scientists to reconstruct continuous annual temperature changes thousands of years ago. The LMS system overcomes previous limitations in sampling ice cores, preserving critical oxygen and hydrogen isotopes needed to infer past temperatures.
Researchers found that BSISO types affect YRV precipitation occurrence frequency and duration, but mechanisms vary across types. High-resolution reanalysis datasets were used to analyze impacts of three BSISO types on summer precipitation.
A new study reveals that the Pacific Walker Circulation has changed its behavior over the industrial era, with volcanic eruptions causing temporary weakening of the circulation. This could lead to more frequent multi-year La Niña or El Niño events, exacerbating climate-related risks.
A new study reveals that volcanic eruptions can temporarily weaken the Pacific Walker Circulation, a major driver of global precipitation. The recent strengthening of this circulation suggests that aerosols from human activity may have an opposite effect on its behavior.
A UK-Sri Lankan research network aimed to develop research capacities among senior academic staff members from both countries. The training network investigated differences, overlaps, and synergies between Climate Change Adaptation (CCA) and Disaster Risk Reduction (DRR) research communities.
The study found that environmental conditions and the state of the ocean can lead to enhanced risk for ocean temperature extremes. Upwelling patterns on a short-term basis also initiate some of these marine heatwaves and cold spells.
A recent study by German and Austrian researchers used stalagmites to document the impact of summer insolation on ice age climate dynamics. The findings suggest that warm phases appeared primarily during peak Northern Hemisphere summer insolation, with model simulations confirming these results.
A new study reveals that large portions of Greenland were ice-free tundra landscapes with trees and woolly mammoths 416,000 years ago. The melting caused at least five feet of sea level rise during a moderate warming period.
Scientists at Rice University found a natural 150-day cycle in the north-south oscillation of atmospheric pressure patterns, influencing hemispheric-scale precipitation and ocean surface wind stress. This discovery challenges conventional wisdom about atmospheric organization and has implications for climate modeling.
A recent study by Dartmouth researchers finds that global economic losses from El Niño can persist for several years after the event, with a significant impact on the world's poorest nations. The study projects total losses of $84 trillion for the 21st century, highlighting the need for climate change mitigation and adaptation strategies.
A new study from Oregon State University found that massive iceberg discharges during the last ice age triggered rapid warming in Antarctica but had no effect on temperatures in Greenland. This discovery challenges current understanding of global climate dynamics and raises more questions than answers.
A record-breaking heatwave in the Pacific Northwest in June 2021 was attributed to a strong high-pressure ridge, which intensified when an atmospheric river moved into Alaska, releasing massive amounts of moisture. The air was exceptionally hot when brought down to the surface due to its temperature aloft.
A new study highlights Asian megacities like Chennai, Kolkata, Yangon, Bangkok, Ho Chi Minh City, and Manila as facing significant risks from sea level rise by 2100. The research incorporates natural sea level fluctuations to show how climate change amplifies this effect, leading to more frequent extreme flooding events.
A team of researchers from Xi'an Jiaotong-Liverpool University and other institutions has identified a flexible and user-friendly model for predicting flood frequency in a changing environment. The fractional polynomial-based regression method is more effective than existing models, which often fail to account for factors like climate ...
Researchers developed a new approach to determine the rate of organic carbon burial in marine sediments, using data from deep-sea drilling sites. This method provides more accurate results than traditional isotope calculations, revealing higher rates of carbon sequestration during warm periods and lower rates during cooling intervals.
The study found that fact-checkers in the US primarily assessed existence claims, while Australians focused on solutions. Effective fact-checking presentations included visual information, concise summaries, and clear verdicts. Researchers hope to expand their research to cover the role of fact-checking in COVID-19 and other topics.
Researchers found that oscillations between extreme wetness and aridity in California were closely linked with wildfires during the 8.2-kiloyear event. The study suggests that hydroclimate fluctuations will become more common due to global warming, leading to an increase in wildfire activity.
A new study by researchers from the University of Oldenburg found that particles from central South America were the primary source of iron in the South Pacific during the last two glacial periods. The team's theory suggests that jet stream circulation picked up fine mineral particles on the east side of the Andes and transported them ...
A new study models likely future cliff retreat rates of two rock coasts in the UK, finding that rock coasts are likely to retreat at a rate not seen for 3,000-5,000 years. The researchers predict that rock coast cliffs will retreat by at least 10-22 meters inland due to accelerating sea level rise.
A new study suggests that climate change is favoring La Niña events in the Pacific Ocean. The researchers found that temperature patterns at the ocean's surface have changed, with the Pacific off South America cooling and the western Pacific warming more than elsewhere. This has led to a strengthened temperature difference between the ...
Researchers found a remarkable record of how the East Antarctic Ice Sheet responded to changes in climate over 100,000 years, with cycles of melting and freezing driven by Southern Ocean temperatures. The study provides new insights into the sensitivity of the ice sheet to small, short-term climate fluctuations.
A recent study in Peru revealed a 50% decline in arthropod biomass following short periods of drought and increased precipitation. Tropical insects are sensitive to both extreme weather events, with rainfall patterns being a key factor in their decline.
A Japanese research group discovered that the leaf area index of mixed-forests influences seasonal changes in the formation of a nocturnal cold-air pool at a small mountain basin. The study found that weakening of the nighttime temperature inversion occurred during leaf expansion, while strengthening occurred after leaf fall.
A new study found that regions with high past temperature variability tend to be less sensitive to current and future climate changes, offering hope for forests' ability to adapt. The research highlights the importance of considering legacy effects of past climate conditions in forest management and climate policy.
A new study found that the global forest area per capita has declined by over 60% from 1960 to 2019, due to 81.7 million hectares of loss. This decline threatens biodiversity and affects the lives of 1.6 billion people worldwide.
Researchers from PSU and WSU aim to understand how atmospheric ridges impact the region's climate. The project will investigate how ridges respond to global warming and its effects on heatwaves, droughts, and wildfires.
A new study reveals that Arctic temperatures have jumped by two steps in the last 50 years, with the second step occurring in 1999 and missed by most climate models. The findings are significant for projecting future climate change, as they highlight the need for more accurate short-term climate projections.
A recent NTU Singapore study finds that climate change is a stronger driver of increasing atmospheric methane than expected, leading to more heat being trapped in the atmosphere. The research suggests that nature could be producing more and consuming less methane than previously realized, contributing to higher methane emissions.
The study uses a global climate system model to simulate large ensemble experiments, which capture internal variabilities' impact on surface air temperature and land precipitation. The research helps improve understanding of forced climate changes and provides guidance for policymakers.
The world's ocean is losing its year-to-year memory due to global warming, making it harder to predict ocean conditions. This decline in ocean memory will have significant impacts on fisheries management, population estimates, and land-based weather forecasts.
A new study projects that climate change will more than double the frequency of intense tropical cyclones globally by 2050, increasing maximum wind speeds by up to 20%. This will disproportionately affect low-income countries and regions that are not currently prone to these events.
A study analyzing 9,000 years of Earth's history found that strong El Niño events intensified over time but with a small change due to global warming. Researchers used ancient coral data and powerful supercomputers to conduct their research, calling for further investigations into earlier climate periods.
Researchers used a novel model ensemble to study compound hot-dry-events and found that precipitation trends determine their future occurrence. The frequency of these events is expected to increase fourfold in a two-degree warmer climate, with an uncertainty of up to 48% for precipitation trends.
A new study provides evidence of growth limitations in Antarctic fish, which have adapted to survive in freezing temperatures. Despite similar ecological conditions, these fish consume less food and grow at half the rate of temperate water cousins when held at the same temperature.
A new study reveals a significant shift in the Northern Hemisphere jet stream position, increasing by up to 330 km and speed by 8% during 1871-2011. This shift is linked to warming Arctic winters and decreased temperature gradients, with implications for climate predictions and storm activity.
A new study found that Amazonian forests are impacted by high maximum temperatures, causing tall trees to shed their leaves and branches. The study, led by the University of Helsinki, used LiDAR to track the effects of fragmentation and climate change on plant phenology.
A recent study by Dr. Henrik Svensmark and colleagues reveals a close connection between supernovae occurrence and the burial of organic matter in sediments on Earth. The correlation indicates that supernovae are essential for life's existence, with high nutrient concentrations leading to increased bioproductivity and oxygen production.
The study, led by Universidad Complutense de Madrid, estimates that record temperatures are eight times higher than expected without global warming. At least one in four new record rainfalls is attributed to climate change.
Scientists discovered a persistent link between Earth's orbit and millennial-scale climate variability. The study analyzed four climate-sensitive records, finding that orbital variations influenced abrupt climate events through the Pleistocene. This discovery highlights the complex interactions between orbital geometry and global glaci...
The Three Gorges Region experienced its second-highest average precipitation on record, with heavy rainstorms and floods dominating the summer of 2020. The region's ecological environment improved, with a significant weakening trend in acid rain over the past decade.
A new study finds that greenhouse warming will increase North Tropical Atlantic variability, causing more frequent extreme events like hurricanes and droughts. The research also reveals an amplification of ENSO-induced temperature anomalies due to increased ENSO variability in a warming climate.
A recent study found that greenhouse gases from human activity and warmer North Atlantic Ocean temperatures contributed to the Northeast's increased extreme precipitation since 1996. The research used global climate model simulations and statistical methods to isolate the causes of the increase.
Researchers found that accounting for climate variability increases predicted sea level rise by 2.7-4.3 inches by 2100, compared to 10.6-14.9 inches without variability. This additional ice melt will impact hurricane storm surges globally.
Using supervised learning algorithm, researchers reduced uncertainty in oceanic N2O emissions by substantial margins. The study reveals a vigorous seasonal cycle dominated by tropical and coastal upwelling regions
Climate scientists have found that individual climate models may not provide the complete picture of the Earth's climate sensitivity due to underestimated internal climate variability. Combining uncertainty from multiple models yields wider distributions, improving long-term predictions.
Research findings show that mid-high latitude climate variability significantly impacts the East Asian monsoon, with a synergistic effect on predictability sources. Chinese scientists propose new concepts to explain combined effects of regional climate variabilities on East Asian climate.
Century-scale climate variability was enhanced when the Earth was warmer during the Last Interglacial period compared to current interglacial conditions. The study reveals series of century-scale arid events in southern Europe and cold water-mass expansions in the North Atlantic.
Researchers found pink noise energy signatures in historical climate proxy data before and after the Industrial Revolution, suggesting a possible link between pink noise and Earth's climate dynamics. The study's findings could have implications for understanding 'resonances' that couple and amplify warming processes.
A recent study suggests that fructans in wheat plants hold the key to developing climate-resilient varieties with increased nutritional value. The authors propose using fructans as a breeding target to create healthier and more resilient wheat varieties.
Researchers reconstruct climate and oceanographic conditions in the westernmost Mediterranean Sea, revealing hot and dry Medieval Climatic Anomaly and cooler Little Ice Age conditions. Human impact also detected in temperature increase, aridification, and soil erosion.
A team of researchers has developed a new method to measure ecosystem sensitivity to climate variability by analyzing satellite data gathered over the past 14 years. The Vegetation Sensitivity Index (VSI) reveals ecologically sensitive regions with amplified responses to climate changes in various parts of the world.
A new study by an international team of scientists confirms that recent record warm years are almost certainly due to human-made climate change. The odds of these extreme temperature records occurring naturally are extremely low, between 1 in 5000 and 1 in 170,000.