(Press-News.org) A team of the University of Barcelona has analysed for the first time what the dry and hot periods could be like in the area of the Pyrenees depending on different greenhouse emission scenarios. The results, published in the journal Natural Hazards and Earth System Sciences, show that under an intermediate scenario, where these emissions that accelerate the climate change could be limited, there would not be a rise in long-lasting dry episodes, but temperatures would rise during these periods. On the other hand, if those emissions were not reduced during the 21st century, the summer no-rain periods would last an average of five more and, in addition, they would go with a rise of temperatures 6ºC over the current ones in the Pyrenees. According to the authors, these results would involve "a potential increase in environmental risks such as wildfires, crop yield losses, negative effects on biodiversity and water resources, etc.".
The study counts on the participation of the researcher Marc Lemus-Canovas, from the Climatology Groupof the UB, and the lecturer Joan Albert López-Bustins, from the Department of Geography. Both are members of the Water Research Institute of the UB.
Two variables that increase environmental risks
The study analysed, on the one hand, whether the length of consecutive days without rain has increased or will increase in the future, and on the other, whether the highest temperatures during the long-lasting dry periods will be higher than the current ones. This is the first time these variables are studied together in the area of the Pyrenees, in an approximation that enables avoiding an underestimation of the risk these climate conditions bring to the area. "Plants are under a hydric stress due to a combination of a long-lasting dry periods and a high temperature, and the stress is higher than if we analyse one of the compounds. The concurrence of long-lasting dry periods and extremely hot temperatures can bring environmental risks such as wildfires, crop yield losses, and in general, serious problems regarding the biodiversity of this area, which would not be detected by considering only one of the variables", says Marc Lemus.
The study used climate data from several parts of the Pyrenees (Catalan Pyrenees, Aragon Pyrenees, etc.) from 1981 to 2015, in the information obtained from the work carried out at the Pyrenees Climate Change Observatory, thanks to the CLIMPY project, which enabled recovering a great part of climate series. "These data show that to date, the risk of the simultaneous concurrence of long-lasting droughts and extreme temperatures has been increased by the raise of one of these cmpounds: temperature. This has taken place similarly in spring and summer and over the general area of the Pyrenees", notes the researcher.
More and more extreme temperatures
In order to estimate the evolution of these two variables during the rest of the 21st century, the researchers considered two out of the future scenarios of greenhouse emissions established by the UN Representative Concentration Pathways group. "Under an intermediate scenario of emissions (RCP4.5), assuming that by the middle of the century the emissions will start a process of stabilization and that by 2100 there will not be a growing trend of gas emissions, the pattern will continue to be the same: temperatures will be more extreme when these dry spells occur, but the length of these dry periods will not increase", describes the researcher.
On the other hand, this situation would substantially change under a scenario of high emissions (RCP8.5), where the volume of emissions would continue to rise during the whole century. Under these conditions, the authors detected that there would be, in spring, an increase in the length of dry periods, mainly in the eastern side of the Pyrenees, and a strong increase in thermal extremes during these dry spells. "Regarding summer, the length of days without rain will increase notably in the northern side of the Pyrenees (the wettest area of this territory) and there will also be a rise of extreme temperatures. The less exposed area to this factor in both elements would be the western area, with a higher Atlantic influence", notes Marc Lemus. According to the researchers, these results highlight the importance of stopping the increasing trend of greenhouse emissions. "We saw it is not ideal in an intermediate scenario because the thermal increase is notable. However, a dramatic increase in the length of dry periods and in extreme temperatures at the same time could lead to a catastrophic scenario, due to the involvements it could have in a fragile area where the 59% of the surface is covered by forests", they warn.
In this sense, the research states that this study should provide "more arguments to the provision of public resources for the actors that work on forest and ecological management of the Pyrenees, in order to adapt it for the future. And mainly, to promote a mitigation policy on climate change which is our pending subject", he concludes.
Recently, the Climatology Group of the UB has received a favourable resolution from the Spanish Ministry on Science and Innovation for the grant of a research project titled "Eventos compuestos secos y cálidos en la España peninsular", which will enable the team to receive resources to continue working on this research line for the next three years.
INFORMATION:
In a new study assessing the potential of a single-dose, intranasal COVID-19 vaccine, a team from the University of Iowa and the University of Georgia found that the vaccine fully protects mice against lethal COVID-19 infection. The vaccine also blocks animal-to-animal transmission of the virus. The findings were published July 2 in the journal Science Advances.
"The currently available vaccines against COVID-19 are very successful, but the majority of the world's population is still unvaccinated and there is a critical need for more vaccines that are easy to use and effective at stopping disease and transmission," says Paul McCray, MD, professor of pediatrics-pulmonary medicine, and microbiology and immunology ...
Philadelphia, July 8, 2021 - Fifty-five percent of Midwest university students had tried a plant-based meat alternative and attributed this choice to the enjoyment of new food, curiosity about the products, and environmental concern, according to a new study in the Journal of Nutrition Education and Behavior, published by Elsevier.
For several decades, there has been a steady growth in consumer concerns about the environmental sustainability of the global food supply, animal welfare ethics, and human health consequences of red meat intakes. To assess the prevalence of plant-based alternatives to meat consumption in students; describe associations between demographics, environmental concern attitudes, and consumption; ...
A new study has linked a July 2015 ceasefire of conflict violence in Colombia with better pregnancy outcomes for women who conceived after the ceasefire began. Giancarlo Buitrago of Universidad Nacional de Colombia in Bogotá, Colombia, and Rodrigo Moreno-Serra of the University of York, U.K., present these findings in the open-access journal PLOS Medicine.
Previous research has suggested the possibility that women living in areas with armed violence experience adverse pregnancy outcomes. However, methodological problems or inappropriate data have hampered prior investigations into these associations.
To better understand these associations, Buitrago and Moreno-Serra examined pregnancy outcome data for women who conceived before and after a ceasefire of conflict violence was declared ...
Scientists at the University of Groningen have trained an Artificial Intelligence system to recognize a specific pattern in skin biopsies of patients with the blistering disease epidermolysis bullosa acquisita. The pattern is characteristic of a specific variant of the disease which can cause scarring of the skin and mucous membranes and may lead to blindness. The new system is easy to use and is better than most doctors in making the diagnosis. A description of this AI system is published in the American Journal of Pathology.
In patients with epidermolysis bullosa, layers of the skin get detached, causing large blisters. There are different forms of blistering diseases affecting different layers ...
Thyroid hormones are amino acid-based molecules produced by the thyroid gland. Involved in direct or indirect regulation of key metabolic pathways, these molecules play critical roles in the development and normal functioning of the body. The mechanism of how thyroid hormones exert their effect on each other as well as on other metabolic pathways is complex, but a two-way feedback loop is central to their biological activity. Dysregulation of the feedback loop that controls their production affects other biochemical pathways, causing various ailments including those related to the cardiovascular system, liver function, or bone development.
Several clinical studies have shown the effect of thyroid hormones on lipid levels: that treating the patients with thyroid hormone analogs helps ...
As luck would have it, the air quality sensors that University of Utah researcher Daniel Mendoza and his colleagues installed in Park City, Utah in September 2019, hoping to observe how pollution rose and fell through the ski season and the Sundance Film Festival, captured a far more impactful natural experiment: the COVID-19 pandemic.
Throughout the pandemic, the air sensors watched during lockdowns as air pollution fell in residential and commercial areas, and then as pollution rose again with reopenings. The changing levels, the researchers found, which behaved differently in residential and commercial parts of the city, show where pollution is coming from and how it might change in the future under different policies.
"The lockdown period demonstrated ...
UNIVERSITY PARK, Pa. -- When it comes to what users share on Twitter, women and users who never attended college voluntarily disclose more personal information than users from other socioeconomic and demographic backgrounds -- potentially making these populations more susceptible to online privacy threats, according to a recent study led by the Penn State College of Information Sciences and Technology.
Additionally, the researchers unexpectedly found that neither socioeconomic status nor demographics is a significant predictor of the use of account security features such as two-factor login authentication, and that users from all backgrounds actually ...
URBANA, Ill. - If you've ever been to an eye doctor, there's a good chance you've felt the sudden puff of air to the eye that constitutes a traditional test for glaucoma. It's no one's favorite experience, but the puff is non-invasive and harmless.
Scientists use a similar method to test learning and memory in animals and humans. Like Pavlov's classic experiments linking a neutral stimulus with a physiological response, the eyeblink test pairs a light or sound with a quick puff of air to the eye. With repetition, the animal learns to close its eye, or blink, in response ...
Researchers from the University of Sussex have determined the structure of a tiny multi-protein biological machine, furthering our understanding of human cells and helping to enhance research into cancer, neurodegeneration and other illnesses.
A biological nanomachine is a macromolecular machine commonly found within the cell, often in the form of multi-protein complexes, which frequently perform tasks essential for life.
The nanomachine R2TP-TTT acts as a molecular chaperone to assemble others in the human cell. It is especially important for constructing mTORC1 - a complicated nanomachine that regulates the cell's energy metabolism, and which often becomes misregulated in human diseases such as cancer and diabetes.
Scientists from the School ...
Researchers, including academics from the University of York, analysed systematic reviews of 1,200 Randomised Controlled Trials (RCTs) to assess whether reporting had improved over time.
However, the information the researchers needed to assess what adverse effects were reported (and how they were reported) was only included in less than half of the RCTs they analysed.
Co-author Dr Su Golder from the Department of Health Sciences, said: "Drug trials are conducted to give clinicians information on the benefits and adverse effects of treatments. Our study shows that, ...
