Articles tagged with Droughts
A global study synthesizes data from 1980 to 2014 to better understand how drought affects different legume species and soil conditions. The results show that the magnitude of yield loss varies with legume species and phenological state during drought, while soil texture also plays a role.
A study analyzing drought, heat, and insects found that a combination of these factors contributes to over 12 million dead trees in California. Researchers expect this number to rise with climate change.
Residents and commercial users slashed their water use to 41 gallons per person per day by 2010, thanks to a culture shift among ordinary water users. An integrated water management system was key to Melbourne's success in reducing demand during the drought.
Researchers found that tall trees with low hydraulic conductance are most likely to die from future drought stress, posing a significant threat to earth's carbon storage. This study predicts widespread forest mortality under climate warming, highlighting the need for forest management interventions.
The Little Bobtail Lake fire has grown significantly, burning over 13,000 hectares and threatening nearly 700 homes. Drought conditions and dry debris are fueling the fire, with unpredictable weather patterns making it difficult to contain.
Duke University scientists have discovered a previously unknown dual mechanism that slows peat decay and reduces CO2 emissions from peatlands. The naturally occurring mechanism was found in 5,000-year-old pocosin bogs and may occur in other regions as well.
Researchers found two specific ocean hot spots responsible for the record-breaking heat of 1934/36, a decade marked by devastating dust storms. This study may help predict extreme summers over the central US with months-long forecasts.
A recent study on wild baboons reveals that those born during periods of famine have long-term effects on female fertility, making them 60% less likely to become pregnant during food shortages. The findings support the idea that early adversity carries lifelong costs and can lead to poor health as adults.
A new modeling tool predicts that drought-induced forest mortality will occur across the US and Canada by the 2050s due to climate change. The model simulates widespread aspen mortality caused by the 2000-2003 drought, highlighting the importance of understanding tree physiology under water-stressed conditions.
A new study suggests that CO2 increases could intensify extreme droughts in tropical and subtropical regions, such as Australia and the Amazon. The Hadley Circulation is expected to continue expanding and strengthening due to warming climate conditions.
Researchers measured growth and photosynthesis rates in Amazonian trees during severe droughts, finding a 10% decrease in photosynthesis rates. This decrease did not affect growth rates but led to increased tree deaths and potential climate change acceleration.
A new study by Stanford scientists links California's recent droughts to rising temperatures, finding that warm and dry conditions are twice as likely to produce severe droughts. Climate change is also expected to increase the frequency of multi-year droughts in the coming decades.
A new study suggests that a record drought in Syria (2006-2010) was likely stoked by ongoing manmade climate change, contributing to the 2011 Syrian uprising. The researchers found that the drought destroyed agriculture and drove dispossessed farmers to cities, exacerbating poverty and government mismanagement.
A new report by Cornell University and NASA researchers warns of a high risk of megadrought in the Southwest and Great Plains by late this century. The study suggests that reducing greenhouse gas emissions within the next 10 years could mitigate this risk.
A new study predicts that the Western US will face persistent drought worse than any seen in the past 1,000 years, driven by human-induced global warming. The region's larger population and increased resource use will exacerbate the devastating impacts of such a drying period.
A recent study suggests that both regions will experience severe droughts in the future, worse than any in the last millennium. The projections are based on computer model simulations and comparison with past climate reconstructions, indicating a future with extremely parched Southwest and Central Plains.
A USGS study reveals how plants' vulnerability to drought varies across landscapes, with factors like plant structure and soil type influencing their response. The model helps forecast the future state of drylands by understanding how climate change affects water availability and use.
A University of California, Berkeley study reveals that a 650-year period of below-average rainfall led to the abandonment of Cantona, a major city in highland Mexico. Climate change is considered one of the major causes of the collapse.
A team of climate scientists has found that California's drought of 2012-2014 was the worst in 1,200 years. The researchers used tree-ring samples to reconstruct rainfall data back to the 13th century and found that the current period of low precipitation combined with record-high temperatures created severe water shortages.
A new study by Michigan State University scholar Aaron M. McCright found that only 35% of US citizens attribute extreme winter temperatures to global warming, contrary to expectations that such events would change minds.
Research reveals that annual plant growth in drylands is severely affected by droughts, but the ability to recover varies depending on the type of ecosystem and grazing regime. The study found that perennial plants dominate areas with higher drought resistance and lower recovery potential.
A new study by UCLA scientists found that plants have limited wiggle room to survive drought due to their plasticity. Most plant species accumulate salts in their cell sap to fine-tune their tolerance, but this adjustment only provides a relatively narrow degree of additional drought tolerance.
Researchers connect ancient clay tablet data to climate records, suggesting that drought and overpopulation weakened the empire's economy and destabilized its political system. The study draws parallels between the Assyrian Empire's collapse and contemporary issues in the region, highlighting the importance of considering long-term sus...
Researchers link decline of Assyrian civilization to population growth and droughts, drawing parallels with Syria and Iraq today. The study found that a severe drought in the 7th century BC weakened the empire's ability to withstand subsequent climate-related challenges.
Kelly Redmond, a renowned climatologist from the Desert Research Institute, will receive the AGU Tyndall History of Global Environmental Change Lecturer award. He has dedicated his career to understanding the Earth's climate and communicating that knowledge to a general audience.
Researchers at the University of Houston are developing new nanofiltration methods to remove salt from brackish waters, a potentially cheaper alternative to existing desalination techniques. The methods could help alleviate drought-stricken regions' water scarcity issues.
A new NASA study reconstructs North American drought history over the last 1,000 years and finds that the 1934 drought was the driest and most widespread of the past millennium. The drought was caused by a high-pressure system and dust storms, which suppressed rainfall and led to severe conditions across western North America.
A new software program, SOGP 1.0, enables researchers to reconstruct historical global precipitation patterns, providing insights into major weather events like the Dust Bowl. The tool allows for detailed analysis of oceanic and land-based data, improving our understanding of climate change.
A new NASA study reconstructing North American drought history over the last 1,000 years found that 1934 was the driest and most widespread drought of the millennium. The severity was attributed to a combination of high-pressure systems and dust storms caused by poor land management practices.
The 1934 drought was seven times larger than comparable droughts and nearly 30% worse than the next most severe drought, affecting nearly 72% of western US. Dust storms intensified the drought and spread it throughout the region.
A study by researchers links California's ongoing drought to human-caused climate change, showing a persistent region of high atmospheric pressure over the Pacific Ocean is more likely to form in modern greenhouse gas concentrations. The extreme conditions led to unusually low precipitation and triggered wildfires and air pollution.
A Stanford University study links California's ongoing drought to human-caused climate change, finding that a persistent high atmospheric pressure region over the Pacific Ocean is three times more likely to form in the present climate. This blocking ridge prevented winter storms from reaching California during the 2013 and 2014 rainy s...
The King Fire has spread rapidly through the Pollock Pines community, fueled by hot, dry conditions and strong winds. Over 1,600 homes are currently threatened as the fire continues to grow, with mandatory evacuation orders in place for residents.
Researchers at Duke University have identified a gene, called OSCA1, that helps plants sense water availability and adjust their water conservation machinery accordingly. The findings could lead to new ways to help crops thrive when water is scarce.
A study by Cornell University and the U.S. Geological Survey warns that the Southwest US is at risk of a 'megadrought', with a 50% chance of a decade-long drought and 20-50% chance of a drought lasting over 30 years
Scientists at UC San Diego's Scripps Institution used GPS technology to track uplift caused by the severe drought, estimating a water deficit of 62 trillion gallons. This has resulted in an average uplift of 4 millimeters across the western US and up to 15 millimeters in California's mountains.
Research shows that megafires and extreme droughts are associated in California, with the latter being exacerbated by human behavior. This shift has led to changes in the ecosystem, such as a switch from chaparral to grasslands, favoring invasive non-native species.
A new study reveals that sea-level spikes can cause more damage to beaches than hurricanes, while a volcanic risk assessment in Saudi Arabia highlights the danger of future eruptions. Additionally, research finds that large volcanic eruptions can trigger strong droughts in eastern China, posing a threat to its food supply.
A recent study by Ren examined the causes of a devastating debris flow in China, which killed over 1000 people. The research found that geological conditions, surface loading, vegetation roots, and extreme precipitation all contributed to the disaster.
Scientists have developed a new technique to observe root development in 3D and in real-time, allowing them to track cell movements and capture the formation of new roots. This breakthrough could help plant breeders select crops more resistant to drought and flooding.
Researchers developed a new technique to observe root growth in 3D and in real time using fluorescence microscopy. This allows them to track cell movements over three days, capturing the formation of new roots.
A study found that trees with higher carbohydrate storage are more resistant to drought, providing insights for reforestation efforts. Researchers in Malaysia manipulated carbohydrate levels and observed improved drought survival rates in seedlings.
A study analyzing tree rings reveals that droughts in the Rocky Mountains can be even more severe than the 1930s Dust Bowl, with some scenarios suggesting prolonged periods of below-average stream flow and intense droughts like 1580's record low river flow.
Corn yields in central US sensitive to drought conditions increasing over past two decades. Farmers may be pushing limits of productivity under extreme heat and dryness.
Research suggests that Midwest corn and soybean yields could drop by 15-30% over the next half-century due to harsher drought conditions. The study, published in Science, found that corn and soybeans are becoming increasingly sensitive to drought, with yields struggling in dry conditions in Iowa, Illinois, and Indiana.
A new analysis of NASA satellite data reveals a gradual decrease in Congo rainforest greenness, suggesting a slow adjustment to long-term drying trend. The study found that climate factors such as land surface temperatures and decreased cloudiness contribute to the observed browning of the forest canopy.
A recent study found that severe droughts and repeated fires in the Amazon lead to high tree mortality rates, with 60% of trees dying in a single experiment. The researchers warn that climate change will exacerbate this issue, making it essential to implement policies and programs to control forest fires and prevent deforestation.
A new study by Harvard University scientists shows how severe droughts can trigger cascades of ecosystem change that last for centuries. The research analyzed tree rings spanning over 300,000 square miles and 400 years of history in the eastern US.
Researchers have developed nanosensors to track the movement and distribution of the plant hormone abscisic acid (ABA) within plants. This allows for better understanding of ABA's role in drought resistance and plant growth under environmental stress, enabling future studies on how ABA helps plants respond to drought and other stresses.
A new study found that prolonged droughts cause more intense and widespread wildfires, consuming more forests than previously understood. Climate change is expected to lead to shorter rainy seasons and longer dry seasons, increasing the risk of forest fires.
Researchers tracked drought dynamics in the US using a new Event-based Spatial-Temporal Data Model (ESTDM), which analyzed four years of European Space Agency's soil moisture and ocean salinity data. The study aims to predict future drought events by identifying patterns of spreading drought.
Researchers are studying the Amazon ecosystem's response to extreme weather events like droughts and floods to predict its impact on climate change. They will analyze data from NASA satellites, field observations, and fishery activities to understand how changes in water levels affect aquatic and terrestrial ecosystems.
A new study predicts that 12% of land will experience drought by 2100 due to rainfall changes alone, but this number increases to 30% with consideration of evaporative drying. The warming climate may lead to food-price shocks and water scarcity in regions like the US, China, and Africa.
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.
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.
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.
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.