FSU researcher finds forest canopies are warmer than previously thought

 

Stephanie Pau, an associate professor in the Department of Geography.
Source: Florida State University

A study by a Florida State University researcher finds that temperatures in forest canopies are higher than previous estimates, threatening forests’ vital role in mitigating global warming.

Stephanie Pau, an associate professor in the Department of Geography, was part of a team whose study was published in Proceedings of the National Academy of Sciences.

Pau said leaves have optimal temperatures at which they capture carbon from the atmosphere. And as carbon dioxide fuels rising global temperatures, forests remain the most important part of the carbon cycle on land, she said.

“The implications of our study are that with greater warming in the future, tree canopies will not cool as much as we thought they would, and this means they may sequester less carbon from the atmosphere.”

She added: “Global temperatures that are livable for us are very closely tied to how much carbon dioxide forests can remove from the atmosphere.”

The study included the use of cutting-edge thermal camera monitoring technology that measured temperatures every five minutes across a network of sites. While it’s long been known that leaf temperatures often differ from air temperatures, the bulk of previous studies came from experiments on individual leaves.

Healthy rivers, healthy people

A new Stanford University-led study in Costa Rica reveals that restoring relatively narrow strips of riverfront forests could substantially improve regional water quality and carbon storage. The analysis, available online and set to be published in the October issue of Ecosystem Services, shows that such buffers tend to be most beneficial in steep, erosion-prone, and intensively fertilized landscapes – a finding that could inform similar efforts in other countries.

“Forests around rivers are key places to target for restoration because they provide huge benefits with very little impediment to productive land,” said study lead author Kelley Langhans, a PhD student in biology at Stanford University affiliated with the Natural Capital Project. “A small investment could have a really big impact on the health of people and ecosystems.”

Unleashing potential

Vegetated areas adjacent to rivers and streams absorb harmful pollutants in runoff, keeping them out of waterways. Creating effective policies to safeguard these riparian buffers and prioritizing where to implement them is a challenge in part because of a lack of data quantifying the impact of restoring such areas. The researchers, in partnership with officials from Costa Rica’s Ministry of Environment and Energy, Central Bank, and PRIAS Laboratory, analyzed one such policy – Costa Rica’s Forest Law 7575. Passed in 1996 and unevenly enforced since then, the law mandates protection of forested riverfront strips 10 meters (about 33 feet) to 50 meters (about 164 feet) wide.

Through the quantum looking glass

Green laser light illuminates a metasurface that is a hundred times thinner than paper, that was fabricated at the Center for Integrated Nanotechnologies. CINT is jointly operated by Sandia and Los Alamos national laboratories for the Department of Energy Office of Science.
Photo credit: Craig Fritz

An ultrathin invention could make future computing, sensing and encryption technologies remarkably smaller and more powerful by helping scientists control a strange but useful phenomenon of quantum mechanics, according to new research recently published in the journal Science.

Scientists at Sandia National Laboratories and the Max Planck Institute for the Science of Light have reported on a device that could replace a roomful of equipment to link photons in a bizarre quantum effect called entanglement. This device — a kind of nano-engineered material called a metasurface — paves the way for entangling photons in complex ways that have not been possible with compact technologies.

When scientists say photons are entangled, they mean they are linked in such a way that actions on one affect the other, no matter where or how far apart the photons are in the universe. It is an effect of quantum mechanics, the laws of physics that govern particles and other very tiny things.

Although the phenomenon might seem odd, scientists have harnessed it to process information in new ways. For example, entanglement helps protect delicate quantum information and correct errors in quantum computing, a field that could someday have sweeping impacts in national security, science and finance. Entanglement also enables new, advanced encryption methods for secure communication.

Surfaces inspired by nature from the 3D printer

The structure of the surface of its wings gives the morpho butterfly its blue color.
 Credit: Pixabay, Garoch

Using laser radiation, researchers can print tiny structures with the highest precision. A method to imitate the superpowers of animals and plants and to make them accessible to technology.

In order to survive even in extreme habitats, many animals and plants have developed skills in the course of evolution that are only known from superheroes from films. They are mostly based on the extraordinary properties of their surfaces. The imitation of these properties holds great potential for technology to develop new products or to solve technical problems. A research team from Bochum and Kiel has succeeded in imitating the structural color of the famous blue Morpho butterflies using high-precision 3D printing technology. The researchers report on their findings on the so-called two-photon polymerization, or 2PP for short, in the Journal of Optical Microsystems from 2nd. September 2022.

Researchers from the Chair of Laser Application Technology at the Ruhr University Bochum (RUB) led by Prof. Dr. Andreas Ostendorf and Prof. Dr. Cemal Esen and the working group "Functional Morphology and Biomechanics" of the Christian-Albrechts-University in Kiel (CAU) by Prof. Dr. Stanislav Gorb involved.

A thousand days of CHEOPS

Artist's impression of CHEOPS
Credit: ESA / ATG medialab

After a thousand days in orbit, the CHEOPS space telescope shows almost no signs of wear. Under these conditions, it could continue to reveal details of some of the most fascinating exoplanets for quite some time. CHEOPS is a joint mission by the European Space Agency (ESA) and Switzerland, under the aegis of the University of Bern in collaboration with the University of Geneva.

Since its launch from Europe's Spaceport in French Guiana, on December 18th, 2019, the CHEOPS telescope in Earth’s orbit has demonstrated its functionality and precision beyond expectations. During this time, it has revealed the characteristics of numerous fascinating planets beyond our Solar System (exoplanets) and has become a key instrument for astronomers in Europe and worldwide.

Planting trees is not always an effective way of binding carbon dioxide

Test site where extra carbon dioxide is emitted to the air and the biomass growth is measured in the plants.
Photo credit: Louise C Andresen

Tree-planting has been widely seen as an effective way of binding carbon as carbon dioxide levels rise in the atmosphere. But now researchers from the University of Gothenburg and elsewhere are warning that forests on nutrient-poor land won’t be an additional carbon sink in the long term. As forests age, their uptake of CO2 declines and, each time forests are planted, there is a risk of additional carbon being released from the soil.

The capacity of plants to bind carbon is a key factor in calculating the effects of climate change as carbon dioxide levels rise in the atmosphere.

Scientists have now measured how much biomass grows under air with elevated CO2 concentrations in several long-term field experiments. Growth stimulation was poor or missing when the plants lived in poor soil, in some cases after only ten years.

“The total biomass that binds carbon was not stimulated more by the elevated CO2 levels in our experiments over time. Exactly when growth slowed down depended on various factors, but one important one was how much nitrogen the soil contained,” says Louise Andresen, a researcher at the University of Gothenburg.

Agriculture drives over 90% of deforestation in the tropics

Recently destroyed cattle pasture
Credit: Chalmers University of Technology, Toby Gardner

A new study published in leading journal, Science, finds that between 90 and 99 percent of all deforestation in the tropics is driven directly or indirectly by agriculture. Yet only half to two-thirds of this results in the expansion of active agricultural production on the deforested land.

The study is a collaboration between many of the world’s leading deforestation experts and provides a new synthesis of the complex connections between deforestation and agriculture, and what this means for current efforts to drive down forest loss.

Following a review of the best available data, the new study shows that the amount of tropical deforestation driven by agriculture is higher than 80 percent, the most commonly cited number for the past decade.

This comes at a crucial time following the Glasgow Declaration on Forests at COP26 and ahead of the UN Biodiversity Conference (COP15) later this year and can help ensure that urgent efforts to tackle deforestation are guided and evaluated by an evidence base fit for purpose.

“Our review makes clear that between 90 and 99 percent of all deforestation in the tropics is driven directly or indirectly by agriculture. But what surprised us was that a comparatively smaller share of the deforestation – between 45 and 65 percent –​​ results in the expansion of actual agricultural production on the deforested land. This finding is of profound importance for designing effective measures to reduce deforestation and promote sustainable rural development”, says Florence Pendrill, lead author of the study at Chalmers University of Technology, Sweden.

Climate change is affecting drinking water quality

The Rappbode reservoir in the Harz region is surrounded by forests and is the largest drinking water reservoir in Germany.
Photo credit: André Künzelmann/UFZ

The water stored in reservoirs ensures our supply of drinking water. Good water quality is therefore important - but is at significant risk due to climate change. In a model study of the Rappbode reservoir in the Harz region, a research team from the Helmholtz Centre for Environmental Research (UFZ) demonstrated how the climate-related disappearance of forests in the catchment area for Germany's largest drinking water reservoir can affect water quality. The problem of such indirect consequences of climate change is seriously underestimated, the scientists warn in Water Research. Water quality is of critical importance, especially for drinking water reservoirs, as subsequent treatment in the waterworks must continually meet high standards.

Heat waves, drought, floods, forest fires - the consequences of climate change are increasing and are changing our environment. A prime example is the countryside in the catchment area for the Rappbode reservoir in the eastern Harz region. This is the largest drinking water reservoir in Germany and provides drinking water for roughly one million people. Long periods of drought over the years from 2015 to 2020 have so severely weakened the tree population in the Harz region that parasites such as bark beetles have been able to propagate. This further exacerbated the effect: The trees were further damaged and quickly died off. "Over the past four years, the Rappbode catchment area, characterized by conifers, primarily spruce, has lost over 50 percent of its forest," says UFZ hydrologist and last author Prof. Michael Rode. "This massive forest dieback is advancing rapidly and is dramatic. This will have consequences for the drinking water reservoir."

Researchers develop plastic film that can kill viruses using room lights

Credit: Queen's University Belfast

The self-sterilizing film is the first of its kind – it is low cost to produce, can be readily scaled and could be used for disposable aprons, tablecloths, and curtains in hospitals.

It is coated with a thin layer of particles that absorb UV light and produce reactive oxygen species – ROS. These kill viruses, including SARS2.

The technology used to create the film also ensures it is degradable - unlike the current disposable plastic films it would replace, which is much more environmentally friendly.

The breakthrough could lead to a significant reduction in the transmission of viruses in healthcare environments but also in other settings that use plastic films – for example, food production factories.

The Queen’s researchers tested the film for anti-viral activity using four different viruses – two strains of influenza A virus, a highly-stable picornavirus called EMCV and SARS2 – exposing it to either UVA radiation or with light from a cool white light fluorescent lamp.

They found that the film is effective at killing all of the viruses - even in a room lit with just white fluorescent tubes.

Vaccine expected to induce strong monkeypox virus immune response, research shows

An electron microscope image of monkeypox virus particles.
Credit: Dr Jason A. Roberts, Head of Electron Microscopy and Structural Virology at The Royal Melbourne Hospital's Victorian Infectious Diseases Reference Laboratory, Doherty Institute.

New research suggests recommended vaccinia virus (VACV)-based vaccines will mount a robust immune response against the monkeypox virus observed in the current outbreak (MPXV-2022).

Since the new virus was first observed in early May 2022, over 52,000 cases have been confirmed in more than 90 countries, including Australia, where 124 cases have been diagnosed (confirmed and probable).

The study, co-led by University of Melbourne Professor Matthew McKay, ARC Future Fellow and Honorary Professor at the Peter Doherty Institute for Infection and Immunity, and Professor Ahmed Abdul Quadeer, Research Assistant Professor at the Hong Kong University of Science and Technology, was published in the international journal Viruses.

Weeks after the new strain emerged, the team undertook genomic research to find out if the genetic mutations observed in MPXV-2022 may affect vaccine-induced immune responses against monkeypox.