Articles tagged with Droughts
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Climate scientists analyzed tree rings to find that Genghis Khan took power during a severe drought, but his empire expanded during the wettest period in the region. The study suggests human-caused warming may be exacerbating current droughts in Mongolia and Inner Asia.
A recent study using ancient tree rings reveals that the Mongol Empire's rapid expansion was facilitated by a period of unusually mild and wet weather in central Asia. The findings suggest that this favorable climate allowed for increased grass production, which in turn enabled the Mongols to build their powerful horse-riding army.
Research predicts increased frequency and intensity of droughts in southern Europe, with potential reductions in river flow levels up to 40% by 2100. Climate change and intensive water consumption will exacerbate drought conditions, worsening their socio-economic impacts.
Research teams compared climate simulations to assess drought, water scarcity and river flooding impacts. The study found that frequency of drought may increase by over 20%, while 40% more people are at risk of absolute water scarcity without reduced greenhouse-gas emissions.
A new study finds that drought frequency is likely to increase globally by the end of the 21st century due to climate change. The research suggests an increase in global severity of hydrological drought, with greater increases if no mitigation policies are implemented.
New research suggests that the Amazon rainforest can withstand dry conditions due to its ability to recycle moisture, reducing water stress on plants. This natural process helps mitigate the impacts of climate change-induced drought.
A new CU study finds drought is a better predictor of spruce beetle outbreaks in northern Colorado than temperature, with warm and dry conditions causing stress in host trees. The study also suggests that climate fluctuations, including the Atlantic Multi-decadal Oscillation, contribute to drought conditions.
A new study reveals that earthworms can survive for up to three weeks without water by entering a state of estivation, where they reduce their surface area exposure and seal themselves in a mucus-lined chamber. After rewetting, the earthworms were able to recover and regain their weight.
Portugal's Serra da Estrela National Park was finally brought under control after 24 hours of fighting, but one firefighter killed and nine injured. The fires have destroyed over 31,000 hectares this year, according to Portugal's conservation institute.
Researchers found that extreme weather events like droughts, heat waves, and storms reduce the amount of carbon absorbed by terrestrial ecosystems, equivalent to about a third of global CO2 emissions per year. Satellites and recording stations documented the effects of these events on forests, bogs, and grasslands.
A study published in Nature reveals that extreme weather events, such as droughts and heatwaves, significantly reduce the global vegetation's ability to sequester carbon. This reduction can have a lasting impact on the global climate and long-term food security.
Researchers discovered that large waves in Norwegian fjords were triggered by a powerful Japan earthquake, while disposal of Marcellus Shale fracking waste caused earthquakes in Ohio. The Arctic region is also sensitive to black carbon emissions, which can have devastating effects on the environment.
A study by UC San Diego engineers found that dirty solar panels in California lost only 7.4% of their efficiency after 145 days without cleaning, resulting in a mere $20 gain in electricity production. For larger systems, the financial losses are still relatively small.
Researchers have identified a gene that enables Jatropha, a potential biofuel plant, to withstand drought. The study found that the JcPIP1 gene plays a crucial role in recovery from damage, while JcPIP2 may help prevent drought stress.
A UC Riverside-led team has discovered a new chemical called quinabactin that mimics a naturally occurring stress hormone in plants to improve drought tolerance. This breakthrough could provide a powerful tool for farmers to protect their crops under extreme weather conditions.
Scientific studies estimate Colorado River flow declines of 6-45% by 2050, varying due to climate models and spatial resolution. The new study provides a framework for comparison, identifying key factors affecting predictions.
Researchers use satellite data to identify 'hotspots' of water scarcity in the US, warning of potential food supply risks due to groundwater depletion. The study highlights the need for a comprehensive national water policy to address these emerging issues.
Biologist Keith Gido is discovering dramatic changes in native fish communities due to the North American drought. River fragmentation and groundwater withdrawals are affecting aquatic systems and native fish species in the Great Plains.
Researchers found that aerosol pollution from the Northern Hemisphere cooled the region, shifting tropical rain bands and leading to drought in central Africa. The study used decades of historical observations and climate models to determine this global impact. The discovery highlights the remote climate effects of air pollution.
A new analysis by the USDA Forest Service emphasizes managing forests as consumers of water, reducing risk of water stress. This shift in thinking helps maintain resilience and health in a changing climate.
Researchers identified two genes responsible for flowering in a tropical tree species. The genes, SbFT and SbSVP, show dramatic changes before flowering after a four-week drought period. This discovery may help predict mass flowering events, aiding conservation efforts.
Climate change is stressing amphibian populations worldwide, with USGS research revealing that extreme rainfall events and droughts can decrease their numbers. Scientists examined the impact of changes in rainfall patterns on amphibian life cycles, finding that a balance between deluges and droughts is crucial for survival.
A NASA-led modeling study projects that global warming will lead to an increase in heavy rainfall and a decrease in moderate rainfall worldwide. The study suggests that regions around the equator, such as the Pacific Ocean and Asian monsoon areas, will experience significant increases in heavy precipitation.
Engineers at Oregon State University developed a new interactive system to create networks of small wetlands in Midwest farmlands, capturing 29% of runoff using only 1.5% of land. The approach helps prevent massive floods and retain water in a warming climate.
Heavy rains in the Midwest have increased significantly over the past 60 years, according to a study published by the University of Iowa. The research suggests that rising surface temperatures are contributing to this trend, as warmer air can absorb more water vapor, leading to an increase in precipitation.
Recent research highlights a catastrophic acceleration in Canadian Arctic glacier melt, with projections suggesting up to 18% mass loss by the end of the century. Climate change is deemed effectively irreversible, according to model simulations.
A new study led by the University of Arizona has found that monsoon failure plays a significant role in prolonged droughts in the Southwest. The researchers used tree-ring analysis to reconstruct summer precipitation patterns over a 470-year period, revealing that dry summers coincided with severe winter droughts.
Researchers found that certain viruses and fungi work together with plants to improve drought and temperature tolerance. This collaboration is a key to sustainable agriculture and may lead to more natural methods of creating crops that are more heat, drought, and stress tolerant.
A new study using NASA's Gravity Recovery and Climate Experiment (GRACE) satellites has found that the Middle East region lost 117 million acre feet of freshwater reserves between 2003 and 2012. The majority of this loss, approximately 73 million acre feet, was due to reductions in groundwater.
A recent study found that hotter temperatures triggered a widespread die-off of Colorado trembling aspen trees, with the drought from 2000-2003 exacerbating the damage. The researchers used oxygen isotope analysis to determine that summer temperatures were the key factor in drying out surface soil and stressing the trees' water-transpo...
Researchers from Oklahoma State University created a reliable 'calendar' of seasonal drought patterns that can help farmers avoid costly losses to drought conditions. By considering soil properties and water deficits, the study found that traditional atmospheric measurements underestimated drought probabilities.
A study by the University of Arizona and USDA found that plants can adapt their water demand to changing climate conditions, but this resilience has a limit. Prolonged droughts threaten the survival of plant communities, especially in sensitive environments like arid grasslands.
Researchers found that plant water demand fluctuates in response to water availability, but may eventually approach a threshold that limits production. The study suggests that ecosystem resilience will decline as regions experience continued warming and drying trends.
Researchers studied paleoclimate data to understand historical patterns of aridity in Eastern Africa, revealing a clear pattern of dry and wet periods. Climate model simulations showed that sea surface temperatures in the Indian Ocean drive rainfall variations in East Africa.
New genetic analysis reveals that many Amazon tree species are likely to survive man-made climate warming in the coming century. The study finds that these trees have previously survived warmer climates and are expected to endure higher temperatures. However, droughts and forest fires remain major threats to the Amazon's future.
A study published by the Zoological Society of London predicts that mammals will face a bleak future due to climate change, with 1/3 species at risk from cyclones and droughts. The research identifies primates as particularly vulnerable, highlighting the need for conservation efforts to mitigate the impacts of extreme weather events.
A recent study finds that uncontrolled blazes in the Peruvian Amazon are driven by depopulation, increased road networks, and drought, leading to devastating forest, farm, and village losses. Researchers suggest that government policies promoting oil palm plantations could help mitigate these effects.
Scientists use satellite data to map plant stress, providing early warning signs of drought. The maps can aid in drought forecasts and help farmers make practical decisions sooner.
A recent study by George Washington University Professor Amy Zanne found that plants worldwide are operating at their safety threshold for drought, making forests vulnerable to environmental stress. The research reveals that while plants vary in drought resistance, they share similar hydraulic safety thresholds across all forest types.
The University of Southampton is leading a €11.6 million EU-funded research project to develop new crops that can withstand drought, addressing the impact of climate change on crop productivity. The project aims to characterise DNA variation in under-utilised crops and harness this knowledge to produce better crops.
A new study found that UK butterfly populations' sensitivity to extreme drought is affected by habitat type area and degree of fragmentation. Larger, more connected patches of woodland habitat reduced population sensitivity and facilitated faster recovery.
Research found that drought stress enriches microbial communities around plant roots, promoting drought resistance and increasing plant photosynthesis by up to 40%. This discovery highlights the importance of symbiotic relationships between plants and soil microbes in maintaining plant health.
A University of Tennessee study suggests recent droughts may be the new normal, posing significant threats to the nation's forests. The researchers found that the US has experienced several mega-droughts in the last 1,000 years, and projections indicate worsening drought and increased tree mortality by 2050.
Scientists at the University of Hawaii found a significant decrease in northeast trade wind days from 291 to 210 per year. This change is linked to an increase in eastern trade winds and may impact climate patterns, including droughts in Hawaii.
A University of Illinois professor developed simple contracts to clarify expectations, avoid misunderstandings, and protect farmers and customers in CSAs. The downloadable contracts aim to provide a baseline for successful CSAs.
Researchers found that warmer temperatures and increased atmospheric evaporative demand will lead to widespread tree mortality and changes in forest distributions. The study used a 'Forest Drought Stress Index' to estimate annual regional tree-growth variability with exceptional accuracy.
Researchers found that droughts exacerbated by warming temperatures are causing plants to experience stressful growing conditions, especially in low to middle elevations. The study used a growing season index to model and map potential plant responses to droughts under past, present, and future conditions.
A recent study suggests that the ancient Maya's extensive forest clearance may have exacerbated droughts in their empire, potentially hastening their decline. The research, published in Geophysical Research Letters, utilized computer simulations to model the impact of deforestation on climate patterns.
A new study finds that the frequency of extreme shifts in the South Pacific rain band will almost double in the next 100 years, resulting in increased floods and droughts. The warming atmosphere and oceans will also intensify these events, causing massive droughts, severe food shortages, and coral reef mortality.
Scientists used fossil pollen to augment historical records of ancient Egyptian droughts and fires, including a massive 4,200-year-old drought that contributed to the demise of Egypt's Old Kingdom. The study provides insights into the evolution of societies tied to climate variability.
A recent study found that diverse grasslands can tolerate increased periods of drought and climate change due to the presence of drought-resistant species. This diversity allows grasslands to maintain their ecological functions, including carbon sequestration, food sources for grazing animals, and temperature regulation.
Climate scientist Chris Field testifies before the Senate Committee on Environment and Public Works, highlighting the link between climate change and extreme weather events. He urges policymakers to take action to reduce risk, citing evidence from IPCC reports and scientific research.
Scientists warn that chronic droughts like the 2000-04 event could become more frequent and severe, leading to ecosystem damage and reduced carbon sequestration. The region's ability to absorb carbon dioxide may decline by the end of the century, exacerbating global warming.
A multi-institutional initiative seeks to improve the genetic basis of drought resistance in a grass closely related to current biofuels feedstocks and food crops. Researchers will dissect the genetic basis of drought tolerance in these plants, with the goal of developing crops that can endure harsh conditions.
Researchers at Arizona State University are developing a game-changing approach for drought monitoring using satellite detection and hydrologic models. The project aims to provide timely detection of drought events with high accuracy, enabling proactive decision-making for national water managers, irrigation districts, and policymakers.
The Donald Danforth Plant Science Center has received a five-year, $12.1 million grant to develop a new model plant system, Setaria viridis, to advance bioenergy grasses as a sustainable source of renewable fuels. The research focuses on improving drought resistance and water efficiency in these crops.
A massive die-off of pinyon pine and juniper trees in the Southwest threatens to unleash devastating soil erosion and exacerbate water scarcity in the Colorado River basin. The trees' loss is expected to lead to increased dust storms, melting snowpacks, and reduced river flows.
Fires raged in southwestern and northeastern Colorado, with the High Park Fire consuming 83,205 acres, the second-largest fire in Colorado history. The Weber Fire burned approximately 8,300 acres, while the Little Sand Fire had been burning for weeks, threatening nearly 200 people.
Research confirms long-lasting severe droughts in western US throughout history, including 200-year megadroughts in the Sierra Nevada. Scientists used advanced sonar tools and tree-ring analysis to determine precipitation levels over the past 12,000 years.
Researchers warn of rapid groundwater depletion in California's Central Valley and the High Plains, posing risks to US food production. The study suggests that unsustainable irrigation practices may lead to economic challenges for farmers, particularly in the southern High Plains.