Articles tagged with Droughts
Researchers found that hydraulic failure is universal when trees die during droughts, while carbon starvation occurs roughly half the time. This study aims to improve climate change models by understanding tree mortality mechanisms.
Researchers found that droughts cause tree death by disrupting water transport (hydraulic failure) and limiting carbon supply (carbon starvation). This discovery will enhance regional-scale predictions of drought impacts on forests.
A study projects that two-thirds of Europeans will be affected by extreme weather events annually by the end of the century. Heat waves are expected to cause 99% of all future weather-related deaths, increasing from 2700 deaths/year in 1981-2010 to 151500 deaths/year in 2071-2100.
A new model developed by international scientists predicts multi-year US droughts and wildfire risks, enabling improved agricultural planning and water management. The model's success is attributed to the analysis of tropical climate variability, global climate change, and soil filtering effects.
Researchers studying aardvarks in South Africa's Kalahari Desert found that the animals are highly susceptible to warmer and drier climates, leading to severe droughts and high mortality rates. The decline of aardvarks could have indirect consequences for other animals relying on their burrows.
Researchers at Boyce Thompson Institute have received a four-year DARPA award to develop insect-vectored viruses for disease-resistant maize. The project, titled Viruses and Insects as Plant Enhancement Resources (VIPER), aims to engineer genes into maize that can help combat disease, drought, and other yield-reducing stresses.
A new study reveals that the Atlantic and Pacific ocean temperatures play a significant role in droughts and wildfires in southwestern North America. The research shows that the large-scale difference between the two oceans enhances the risk for drought and wildfire in the region.
A study analyzing sea surface temperatures from 1957-2002 found that fluctuations contributed to persistent droughts in North America and the Mediterranean. The researchers showed that increased variability in ocean temperatures correlated with more extreme land temperature anomalies, leading to prolonged droughts.
Research by Lancaster University found that remote Amazonian cities are more vulnerable to environmental pollution, contaminated water, and health risks. Experts emphasize the need for 'adaptive capacity' through improved public services and disaster response planning to mitigate these effects.
A new study reveals that heat stress concurrent with drought or water excess can explain about 40% of the changes in wheat yields from one year to another. Water excess affects wheat production more than drought in several countries, contributing to reduced yields due to increased pests and diseases.
Scientists discovered silver fir and Douglas fir are more tolerant to extreme droughts than Norway spruce in the Black Forest. Replacing spruce forests with mixed-species forests of these conifers could have a greater positive effect on biodiversity.
Researchers calculate that compound climate extremes, such as heatwaves and droughts, are more frequent than expected. This can lead to increased health risks, agricultural losses, and economic threats due to the interconnectedness of modern societies.
Researchers from the University of Utah analyzed oxygen isotope data from herbivore teeth and tusks to understand climate dynamics in the Omo-Turkana basin. The findings suggest that fluctuations in rainfall timing and interactions between plants and animals, rather than long-term drought, drove changes in the region's ecosystem.
Researchers discovered a biological pathway that allows plants to produce acetate when water is scarce, increasing drought tolerance. Vinegar treatment increased plant survival rates by over 70% in various crops, offering a promising, non-genetically modified solution.
A new study from Ohio State University suggests that capable governments are crucial in preventing food-related violence induced by climate change. The researchers found that weak political institutions, poverty, and dependence on agriculture make countries more vulnerable to such uprisings.
Scientists at the University of York found that the 1976 drought was the most devastating event for butterflies and moths in 50 years. The study measured data against extreme weather events since 1968, revealing a significant impact on over 50 species. Researchers warn that global warming may exacerbate such events in the future.
Scientists have developed a new model that predicts Sahel summer rainfall with high accuracy, enabling decision-makers to anticipate future cycles of droughts and floods. This improved understanding has the potential to help local communities become increasingly resilient to the region's variable climate.
The Ecological Society of America honored Michael J.M. McTavish with the Murray F. Buell Award for his presentation on selective granivory of exotic earthworms, while Julienne E. NeSmith received the E. Lucy Braun Award for her poster on interactive effects of soil moisture and plant invasion.
A study by UCLA and University of Houston researchers reveals significant groundwater loss in the Central Valley during two droughts, with losses totaling 16.5 cubic kilometers and 40 cubic kilometers, respectively. The increase in groundwater loss was attributed to reduced precipitation, snowmelt, and changes in crop cultivation, high...
Research suggests that a 1.5C temperature increase will lead to twice as many extreme ocean heat events like the 2016 Great Barrier Reef damage, while a 2C rise triples the odds of mass bleaching. The study models thousands of years under different scenarios and finds keeping temperatures below 1.5C reduces extreme events and costs.
Scientists discovered that salicylic acid can improve a crop's ability to deal with drought by increasing the levels of three enzymes involved in the stress response. The treatment allows for more selective planting of drought-tolerant cowpea varieties, enabling them to grow in areas with limited water.
A recent study found that a specific wave pattern in the upper atmosphere, called wavenumber-5, is associated with California's droughts and floods. The wave pattern emerges during the northern winter and can lead to persistent extreme events like heat waves, droughts, and floods. Scientists hope that this new understanding of wavenumb...
Scientists at RIKEN developed transgenic rice strains that resist drought stress, showing higher yields and increased biomass. The modified rice lines produced more galactinol, a key osmoprotectant, to cope with water loss, leading to improved drought tolerance.
A new Yale-led study reveals a connection between drought exposure and adverse human health among older adults in the US. Researchers found that severe drought conditions increase the risk of mortality among adults 65 or over, as well as cardiovascular disease risk, particularly in areas where droughts are rare.
Researchers sequenced the genome of Xerophyta viscosa, a 'resurrection plant', to understand its ability to tolerate severe drought. The study revealed key genes that enable plants to survive desiccation and opens up new areas of exploration for developing drought-tolerant crops.
Research suggests that modifying diets by a few grams per day can significantly reduce groundwater use, cut greenhouses gases, and improve human health. Small and medium farms are essential to sustain global food supply, with estimates suggesting a 70% increase in food availability needed by 2050.
Researchers at the University of Kansas found that weather whiplash, caused by changing climate patterns, will degrade Midwest's drinking water due to extreme fluctuations between drought and floods. This leads to a spike in nitrogen levels in surface waters, forcing municipalities to construct costly nitrate-removal facilities.
A recent study evaluates the regional applicability of seven drought indices in China, including PDSI, SPI, SPEI, and SWI. The results show that some indices perform well in certain regions, while others may not be suitable for specific areas due to empirical parameters or sensitivity to temperature anomalies.
Climate change will make farming more difficult due to reduced planting windows and increased drought risk, affecting crop yields and food security. The University of Illinois study forecasts that the typical planting window for corn will no longer be workable, with April and May being too wet to work fields in most parts of Illinois.
A study by Chapman University found that California's water conservation messaging strategies, such as conservation tips and loss aversion, can actually decrease participants' attitude towards water conservation. The researchers suggest that these strategies may need to be reconsidered or monitored for their effectiveness.
A study by Potsdam Institute for Climate Impact Research finds that human-caused climate change can trigger a vicious circle of drought and forest loss in the Amazon. The risk is heightened if there are fewer tree species in a forest patch, but diversity can help forests survive dry seasons.
A decrease in summer rainfall over the Asian inland plateau region led to a significant increase in drought conditions. The interdecadal change was caused by a quasi-zonal wave-like pattern and warming North Atlantic SST anomalies.
A new study found that approximately 10% of intense droughts travel between continents in predictable patterns, with the largest and most severe ones having the highest potential for damage. The researchers analyzed drought data from 1979 to 2009, identifying hotspots on each continent where similar tracks were followed.
A new study published in Nature Geoscience shows that US grasslands are more than three times more sensitive to vapor pressure deficit, or atmospheric dryness, than they are to precipitation. This means that plants in US grasslands are more likely to be damaged by drought due to the high sensitivity of their stomata to dry air.
A recent study by Dr. Kirk Winemiller and his Brazilian colleagues analyzed a long-term database of fish survey statistics and hydrology in the central Amazon. The research reveals that climate change is causing alterations in regional precipitation, affecting water quantity and quality and leading to changes in fish species populations.
Researchers found that tree death due to drought is consistent across environments worldwide, with denser wood and smaller leaves providing better resistance. Climate change implications include increased tree mortality and future global warming.
Researchers warn that climate change will continue to shrink the Colorado River's flows, reducing water supplies for seven US Western states and Mexico. With temperatures projected to rise and precipitation uncertainty, future drought periods are likely, posing significant challenges for water managers.
A study led by UC Santa Cruz researchers found that drought increases the severity of West Nile virus epidemics in the US, while populations that have experienced large outbreaks acquire immunity to limit subsequent epidemics. Drought is a key driver of transmission, particularly after large outbreaks.
The Comprehensive Everglades Restoration Plan has achieved positive results, with more water flowing through the system than before. However, the plan's failure to account for climate change poses a significant challenge, and future updates are needed to incorporate rising sea levels and changing rainfall patterns.
A strong El Niño does not necessarily result in a higher predictability of extreme drought, according to researchers. However, combining low- and high-latitude precursors improves the forecast accuracy of the EU pattern, which favors anomalous northerly conditions over North China.
A study by University of California - Davis scientists found that trees growing in already dry areas are most susceptible to drought. Dense forests in the driest regions are at risk of mass mortality during extreme droughts, which can take years to surface.
A new study projects a 10-13% decrease in global mild days by the end of the century due to climate warming. Tropical regions are expected to lose up to 50 fewer days of mild weather, while mid-latitudes will gain more mild days.
A new study reveals that grazing pressures compound drought stress, delaying recovery and reducing ecosystems' tipping points. Grazing animals and fungal pathogens can kill drought-weakened vegetation, preventing plants from recovering.
A recent NASA study found a significant correlation between wildfires and drought in northern sub-Saharan Africa. The research, led by Charles Ichoku, used satellite records to analyze the impact of fires on water cycle indicators, revealing that burning suppresses precipitation in the region.
A new study from University of Utah researchers finds a correlation between drought and high-elevation aerosols in the western US, suggesting that wildfires are driving the increase in summer haze. Aerosol particles can trigger cloud formation, exerting their own influence on global temperature and climate.
Researchers used computer technology to learn how past societies responded to climate change, identifying crops and strategies that can be useful today. The studies found that drought-tolerant crops like Hopi corn and foxtail millet could become crucial for human survival in areas impacted by climate change.
A new study published in Geophysical Research Letters attributes the 2015 West Coast record-low snowpack to unusually high temperatures, not low precipitation. The researchers used a crowd-sourced supercomputer to analyze data and found that greenhouse gases contributed strongly to the risk of snow droughts in Oregon and Washington.
A VIB and Ghent University research team has identified key genes that enable plants to respond to drought stress. These core genes play a pivotal role in a plant's defense mechanism against drought, allowing for advanced breeding and genome engineering efforts to create drought-tolerant crop plants.
Scientists found that analyzing snowmelt and soil moisture could have predicted the 2012 US drought up to four months in advance. The study used a combination of observations and a regional model ensemble to improve seasonal drought forecasts.
Researchers at Australian National University are developing next-generation food crops that can produce bigger yields and resist drought better than current crops. Crops like sorghum and millet use a more efficient form of photosynthesis, allowing them to thrive in extreme conditions.
Scientists have discovered that certain plants resistant to a hormone called abscisic acid (ABA) can grow better than normal neighbors during droughts. ABA-resistant varieties may hold the key to breeding 'stay green' traits in crops, which could help them retain their leaves and continue to produce food and other essential resources.
Researchers at the University of Washington found that adding microbes to plants increases their tolerance to drought. The microbes enhance plant growth, reduce water usage, and promote nutrient accumulation, allowing plants to store more water and survive longer under stress.
Researchers sequenced the genome of C. geophilum and found specific adaptations that could help host trees be more resistant to drought stress. The fungus has a reduced number of plant cell wall degrading enzymes and a large set of symbiosis-induced lineage-specific genes, including water channel genes.
Research finds that low atmospheric humidity is a significant cause of plant stress in hot, dry weather, reducing their ability to offset climate change. Models should be refined to account for this effect, which will become increasingly important as the Earth's climate warms.
A new study reveals that water conservation by plants under high CO2 conditions compensates for much of the effect of warmer temperatures, retaining more water on land than predicted. This changes assumptions of climate change impacts on agriculture, water resources, wildfire risk, and plant growth.
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.
A mathematical model developed at TU Wien found that the Mayans' irrigation technology may have contributed to their collapse. The study suggests that while water reservoirs can provide relief during droughts, they may also make populations more vulnerable during prolonged dry spells.
Researchers discovered that mussels improve water storage around grass roots and reduce soil salinity, allowing marshes to recover from drought in less than a decade. This mutually beneficial relationship between mussels and marsh grass can help ecosystems bounce back from extreme climatic events.
Research by Salk Institute scientists reveals phaseic acid's unexpected role as a plant hormone crucial for drought resistance and survival traits. The study suggests that phaseic acid may inform the development of new, hardier crops to weather climate change-induced natural disasters.
A study by University of California - Davis researchers found that drought conditions significantly impact Douglas fir tree growth, with warmer and drier conditions causing the most stress. The analysis of tree core samples over a 91-year period indicates projected decline in growth rates under future climate change scenarios.