Just a few towering white fir, sugar pine and incense cedars per acre at Yosemite National Park are disproportionately responsible for photosynthesis, converting carbon dioxide into plant tissue and sequestering that carbon in the forest, sometimes for centuries,

The post Heavyweight trees are forest champs at sequestering carbon appeared first on Smithsonian Insider.

A team of researchers has for the first time mapped the above ground carbon density of an entire country in high fidelity. They integrated field […]

The post Research team creates first carbon map of an entire country: Panama appeared first on Smithsonian Insider.

Hot spots of mercury pollution in aquatic sediments and soils can contaminate local food webs and threaten ecosystems, but cleaning them up can be expensive […]

The post Toxicity of mercury hot spots can be reduced with application of activated carbon, researchers discover appeared first on Smithsonian Insider.

Scientists from the Smithsonian and the University of Rhode Island have found unsuspected linkages between the oxidation state of iron in volcanic rocks and variations […]

The post Scientists uncover relationship between lavas erupting on sea floor and deep-carbon cycle appeared first on Smithsonian Insider.

A new study shows that as climate change enhances tree growth in tropical forests, the resulting increase in litterfall could stimulate soil micro-organisms leading to a release of stored soil carbon.

The post Increased tropical forest growth may result in release of stored carbon in the soil appeared first on Smithsonian Insider.

Under elevated carbon dioxide levels, wetland plants can absorb up to 32 percent more carbon than they do at current levels, according to a 19-year […]

The post High CO2 spurs wetlands to absorb more carbon appeared first on Smithsonian Insider.

When scientists discuss global change, they often focus on the amount of carbon in the atmosphere and vegetation. But soil contains more carbon than air […]

The post Fungi may determine the future of soil carbon appeared first on Smithsonian Insider.

Trees put on weight faster and faster as they grow older, according to a new study in the journal Nature. The finding that most trees’ […]

The post Trees grow faster and store more carbon as they age appeared first on Smithsonian Insider.

Tropical forests are a sometimes underappreciated asset in the battle against climate change. They cover 7 percent of land surface yet hold more than 30 […]

The post Vine-choked forests can’t capture carbon appeared first on Smithsonian Insider.

Although useful to Tarzan, vines endanger tropical forests’ capacity to store carbon. In a major experimental study in Panama, Smithsonian researchers showed that woody vines, […]

The post Climbing plants disturb carbon storage in tropical forests appeared first on Smithsonian Insider.

How much is a wetland worth? It’s a question that has plagued policymakers, scientists and other leaders looking to protect their communities and slow down […]

The post New report enables creation of carbon credits for restored wetlands appeared first on Smithsonian Insider.

During investigations of the formation of hydrated magnesium carbonates, a sample of the previously unknown magnesium carbonate hexa­hydrate (MgCO3·6H2O) was synthesized in an aqueous solution at 273.15 K. The crystal structure consists of edge-linked isolated pairs of Mg(CO3)(H2O)4 octa­hedra and noncoordinating water mol­ecules, and exhibits similarities to NiCO3·5.5H2O (hellyerite). The recorded X-ray diffraction pattern and the Raman spectra confirmed the formation of a new phase and its transformation to magnesium carbonate trihydrate (MgCO3·3H2O) at room temperature.

The monoclinic crystal structure of Na2SO3(H2O)7 is characterized by an alternating stacking of (100) cationic sodium–water layers and anionic sulfite layers along [100]. The cationic layers are made up from two types of [Na(H2O)6] octa­hedra that form linear 1∞[Na(H2O)4/2(H2O)2/1] chains linked by dimeric [Na(H2O)2/2(H2O)4/1]2 units on both sides of the chains. The isolated trigonal–pyramidal sulfite anions are connected to the cationic layers through an intricate network of O—H⋯O hydrogen bonds, together with a remarkable O—H⋯S hydrogen bond, with an O⋯S donor–acceptor distance of 3.2582 (6) Å, which is about 0.05 Å shorter than the average for O—H⋯S hydrogen bonds in thio­salt hydrates and organic sulfur com­pounds of the type Y—S—Z (Y/Z = C, N, O or S). Structural relationships between monoclinic Na2SO3(H2O)7 and ortho­rhom­bic Na2CO3(H2O)7 are discussed in detail.

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A new study shows that the West Antarctic Peninsula is experiencing some of the most rapid climate change on Earth, featuring dramatic increases in temperatures, retreats in glaciers and declines in sea ice. The Southern Ocean absorbs nearly half of the carbon dioxide -- the key greenhouse gas linked to climate change -- that is absorbed by all the world's oceans. The study tapped an unprecedented 25 years of oceanographic measurements in the Southern Ocean and highlights the need for more monitoring in the region. The research revealed that carbon dioxide absorption by surface waters off the West Antarctic Peninsula is linked to the stability of the upper ocean, along with the amount and type of algae present. A stable upper ocean provides algae with ideal growing conditions. During photosynthesis, algae remove carbon dioxide from the surface ocean, which in turn draws carbon dioxide out of the atmosphere. From 1993 to 2017, changes in sea ice dynamics off the West Antarctic Peninsula stabilized the upper ocean, resulting in greater algal concentrations and a shift in the mix of algal species. That's led to a nearly five-fold increase in carbon dioxide absorption during the summertime. The research also found a strong north-south difference in the trend of carbon dioxide absorption. The southern portion of the peninsula, which to date has been less impacted by climate change, experienced the most dramatic increase in carbon dioxide absorption, demonstrating the poleward progression of climate change in the region.

Image credit: Drew Spacht/The Ohio State University

Current federal tax provisions have minimal net effect on greenhouse gas emissions, according to a new report from the National Research Council.

There is no substitute for dramatic reductions in greenhouse gas emissions to mitigate the negative consequences of climate change, a National Research Council committee concluded in a two-volume evaluation of proposed climate-intervention techniques.

There would not be sufficient benefit to updating estimates of the social cost of carbon (SCC) within a year based only on the revision of a specific climate parameter in the existing framework used by the government’s interagency group to measure the SCC, says a new interim report from the National Academies of Sciences, Engineering, and Medicine.

To estimate the social cost of carbon dioxide for use in regulatory impact analyses, the federal government should use a new framework that would strengthen the scientific basis, provide greater transparency, and improve characterization of the uncertainties of the estimates, says a new report by the National Academies of Sciences, Engineering, and Medicine.

The U.S. Global Change Research Program (USGCRP) asked the National Academies of Sciences, Engineering, and Medicine to review the draft Fourth National Climate Assessment (NCA4) – a congressionally mandated report that evaluates the state of climate science and the broad range of impacts of climate change in the United States every four years – and the draft Second State of the Carbon Cycle Report (SOCCR2) – a report that feeds into the overall assessment process developed by the USGCRP.

A new report from the National Academies of Sciences, Engineering, and Medicine outlines a research agenda for improving the commercial viability of technologies that turn greenhouse gases from the burning of fossil fuels into useful products such as fuels, construction materials, and chemicals.

To achieve goals for climate and economic growth, “negative emissions technologies” (NETs) that remove and sequester carbon dioxide from the air will need to play a significant role in mitigating climate change, says a new report from the National Academies of Sciences, Engineering, and Medicine.

Several countries around the world are emitting less carbon due to the pandemic slowdown, but the climate will continue to warm.; Credit: Andy Buchanan/AFP via Getty Images

With the dramatic reduction in car traffic and commercial flights, carbon emissions have been falling around the globe. If the slowdown continues, some are estimating the world could see the largest drop in emissions in the last century.

Still, overall greenhouse gas emissions in the atmosphere are still going up and the decline will likely be smaller than what scientists say is necessary to avoid the worst impacts of climate change.

So far, the effects are just starting to appear. In China, the first country to lock down, greenhouse gas emissions dropped an estimated 25% in February as factories and industrial producers slowed output. That decreased coal burning, which has come back slowly since then.

"A month or two of shelter in place will drop carbon dioxide emissions a few percent here or there, but it won't change the year substantially unless we stay like this for some time," says Rob Jackson, environmental scientist at Stanford University.

The declines are still too small to be read by greenhouse gas observatories around the world, like the one on top of the Mauna Loa volcano in Hawaii, given the natural changes in atmosphere this time of year. Because much of the Earth's land mass is in the northern hemisphere, plants and forests there cause carbon levels to fluctuate as they bloom in the spring, drawing carbon dioxide from the air.

If countries continue shelter-at-home orders, emissions declines could be greater. The U.S. Energy Information Administration estimates U.S. emissions from gas and energy use could drop more than 7% this year, similar to a 2009 decline during the financial crisis.

Worldwide, early estimates put global emissions dropping around 4%. Still, that's less than the 7.6% the U.N. says is needed to avoid the worst impacts of climate change by limiting warming to 1.5 degrees Celsius.

To achieve those cuts, scientists say more fundamental changes are needed, like switching to renewable energy.

"This isn't the way we want to reduce our fossil fuel emissions," says Jackson. "We don't want tens of millions of people being out of work as a path to decarbonizing our economy. We need systemic change in our energy infrastructure and new green technologies."

Still, Jackson says the recent changes are providing useful insights.

"It's as if a third of the cars on the road were suddenly electric, running on clean electricity and the air pollution is plummeting," says Jackson. "It's really a remarkable experiment and it shows the benefits of clean energy."

This content is from Southern California Public Radio. View the original story at SCPR.org.

Full Text:

A new study shows that the West Antarctic Peninsula is experiencing some of the most rapid climate change on Earth, featuring dramatic increases in temperatures, retreats in glaciers and declines in sea ice. The Southern Ocean absorbs nearly half of the carbon dioxide -- the key greenhouse gas linked to climate change -- that is absorbed by all the world's oceans. The study tapped an unprecedented 25 years of oceanographic measurements in the Southern Ocean and highlights the need for more monitoring in the region. The research revealed that carbon dioxide absorption by surface waters off the West Antarctic Peninsula is linked to the stability of the upper ocean, along with the amount and type of algae present. A stable upper ocean provides algae with ideal growing conditions. During photosynthesis, algae remove carbon dioxide from the surface ocean, which in turn draws carbon dioxide out of the atmosphere. From 1993 to 2017, changes in sea ice dynamics off the West Antarctic Peninsula stabilized the upper ocean, resulting in greater algal concentrations and a shift in the mix of algal species. That's led to a nearly five-fold increase in carbon dioxide absorption during the summertime. The research also found a strong north-south difference in the trend of carbon dioxide absorption. The southern portion of the peninsula, which to date has been less impacted by climate change, experienced the most dramatic increase in carbon dioxide absorption, demonstrating the poleward progression of climate change in the region.

Image credit: Drew Spacht/The Ohio State University

Urban vegetation could have been overlooked as valuable above-ground carbon storage, according to researchers. They estimated that 231,521 tonnes of carbon were stored in above-ground vegetation in a UK city, the majority of which (97 per cent) in trees. This was 10 times the amount estimated from national figures for the same city area.

For the first time, researchers have applied a carbon footprint analysis to calculate carbon sequestration by an urban green space. Their results indicate that urban green space can act as a carbon sink, but its design and maintenance influence the amount stored.

Researchers have developed a method to identify the parts that contribute the most to a product's greenhouse gas (GHG) emissions and evaluate alternative design solutions. When applied to a LCD television, it showed that GHG emissions could be cut by 36 per cent by using alternative parts to those currently used.

New research has recommended using both ecological and carbon footprints to assess the impact of environmental policies and strategies at a regional level. The combination can provide an evidence-based means of evaluating policies to help achieve environmental targets.

Environmentally responsible attitudes and behaviour do not necessarily translate into real benefits for the environment, according to the results of a new study. The study shows that people who think they are environmentally aware – and even those who, in some respects, seem to behave in an environmentally friendly way – actually have just as large an impact on the environment as other consumers.

Increasing the use of recycled materials could substantially reduce the carbon footprint of plastic packaging, research suggests. A new study of the life-cycle of plastic trays has shown that increasing the proportion of recycled material could lead to a significant reduction of greenhouse gas emissions.

The majority of respondents to a UK survey would like to see labels explaining the carbon footprint of the food they buy. 72% of the supermarket shoppers questioned were in favour of carbon labels on food. The survey also found that 42% had changed their shopping habits in the last 10 years in response to environmental concerns.

The ability of the Earth’s living systems to store carbon could play a vital role in the mitigation of climate change. A new report suggests that, in coming decades, safeguarding and restoring carbon in ecosystems has the potential to prevent well over 50 gigatonnes (Gt) of carbon entering the atmosphere.

Storage of carbon in soil helps to keep land fertile and regulates the climate, and is therefore an important ecosystem service. However, mapping of soil carbon stocks currently uses unreliable measures. This study used data from a national survey of English grasslands to show that soil carbon stocks can be accurately predicted using simple measures of soil and climatic conditions.

Pollen allergy is a common cause of allergic respiratory diseases such as hay fever and asthma. A recent continent-wide study suggests that rising carbon dioxide (CO2) emissions over the last 30 years may be increasing pollen counts especially in European cities, which could have serious consequences for public health.

Upland peat soils provide a substantial carbon sink if managed properly, according to new research. A study of a peatland area in the UK indicated that it could potentially store approximately 160,000 tonnes of CO2 per year.

Phrases that combine 'carbon' with other words, such as 'carbon finance' or 'carbon footprint', can provide insight into how climate change issues are communicated. A new study explored online use of these so-called 'carbon compounds' and indicated that they form three clusters focused on finance, lifestyle and attitudes.

The world’s soils have the potential to store about 3000 megatonnes of carbon per year by the end of the 21st century, according to a new study. It suggests that restoring carbon to cropland and peat soils through practices such as afforestation and no-till farming could help solve global problems of food insecurity and climate change.

Scientists have calculated carbon budgets for croplands in Europe, based on field measurements from nine sites across Europe. They found that significant soil carbon losses occurred from cropping even though some farmers used measures to enhance carbon-sequestration. These results may challenge findings from some other modelling studies if they turn out to be typical for all EU croplands.

Land cleared in the tropics loses nearly twice as much carbon and produces less than half the annual crop yield as land in temperate zones, according to researchers. Their analysis of the trade-off between crop production and the loss of carbon stored in vegetation highlights the need to target reforestation in the tropics.

The actual carbon footprint of products and services can differ considerably according to how energy used to manufacture the product was generated – for example, whether it was generated by fossil fuel or renewable sources. A recent US study has therefore recommended that differences in regional power supply should be acknowledged by life cycle assessments of products and services.

A new study has combined measurements of carbon dioxide (CO2) fluxes with estimates of other greenhouse gas (GHG) emissions from farming operations for 15 European crop sites over several years. It estimated that the sites lost on average 138g of carbon per m2 per year. The total GHG balance (including non-CO2 emissions) was equivalent to an average carbon loss of 203g of carbon per m2 per year.

Although the public are largely aware of climate change, their understanding of how they produce and manage carbon is generally not sufficient to lead to changes in behaviour and lifestyle, according to a recent study. The researchers therefore recommend policy action to increase the ‘carbon capability’ of the general public.

Urban vegetation could have been overlooked as valuable above-ground carbon storage, according to researchers. They estimated that 231,521 tonnes of carbon were stored in above-ground vegetation in a UK city, the majority of which (97 per cent) in trees. This was 10 times the amount estimated from national figures for the same city area.

The greenhouse gas emissions from the construction of new houses are so high that they exceed the emissions from three decades of use, a Finnish study has found. The research is based on houses complying with recently introduced, energy efficient building regulations. According to the authors, as buildings become more efficient this ‘carbon spike’ associated with construction is more important than has been suggested by previous studies.

Permafrost and wetlands in high latitudes could switch from carbon sink to carbon source by the end of the century, according to a recent study. Using a model of terrestrial ecosystems that showed how carbon is stored and released in soils at high latitudes, researchers revealed that climate change could cause these soils to release much more carbon than previously predicted.

Extreme events, such as droughts and prolonged dry spells, under climate change could increase the water repellency of soils, according to a recent study. In the long-term, this could reduce the capacity of soils to sequester carbon.

A recent study from Finland on the carbon footprint of food can help producers and consumers make choices that lower the food chain’s impact on climate change, by highlighting hotspots in the food chain for improvement and revealing food’s overall impact.

The majority of respondents to a UK survey would like to see labels explaining the carbon footprint of the food they buy. 72% of the supermarket shoppers questioned were in favour of carbon labels on food. The survey also found that 42% had changed their shopping habits in the last 10 years in response to environmental concerns.

A new study has explored how cities can create a low carbon future by presenting an approach to stakeholder engagement that develops scenarios of an ideal city. Rather than projecting towards a low carbon target for the future, the study suggests that ‘backcasting’ to the present day from these scenarios may provide a useful goal-orientated approach to environmental planning in cities.

Grasses growing at the bottom of our oceans lock away large quantities of ‘blue carbon’, according to a new study. The results suggest that the soil that seagrass grows on is capable of storing more carbon than soils on land and as a result of the current global decline in seagrass, vast stores of carbon may be being released into the ocean and atmosphere.