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Carbon Cycle

2 news articles per week.
45 connected topics.


News and Opinion

Coverage of carbon cycle since February 16, 2021.

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Reliably measuring whether rivers or lakes run out of air

"...Using the conventional measurement method, water samples are mixed with the chemicals permanganate or dichromate. These are especially reactive and break down all organic substances in a short time. The quantity of consumed permanganates or dichromates can then be used to determine how much organic substance was contained in the water sample..."

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World's first study to evaluate greenhouse gas emissions from Chinese inland waters

"...Inland waters are an important component of the global carbon cycle and function as active reactors, transporting and transforming large quantities of naturally- and anthropogenically-derived carbon. Previous studies suggest that inland waters are major sources for greenhouse gas emissions to the atmosphere, yet these emissions are poorly constrained (Note 1)..."

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Mountain growth influences greenhouse effect

"...Taiwan is an island of extremes: severe earthquakes and typhoons repeatedly strike the region and change the landscape, sometimes catastrophically. This makes Taiwan a fantastic laboratory for geosciences. Erosion processes, for example, occur up to a thousand times faster in the center of the island than in its far south..."

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Tiny currents may impact vital ocean food source

"...Copepods are tiny crustaceans about the size of a grain of rice, but they are one of the most important parts of the Earth's aquatic ecosystems. Their behavior and interaction with the environment, however, remains a relative mystery. Now, a recent paper published in the Journal of Experimental Biology sheds new light on how these miniature marvels move and cluster in the ocean..."

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Plastic is part of the carbon cycle and needs to be included in climate calculations

"...Plastic transports carbon in different ways. For instance, plastic can become incorporated into living organisms, or settle to the bottom of the ocean as aggregates of plastic and organic matter. It can also release greenhouse gases at every stage of its life cycle, from production to transportation to waste disposal..."

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Twice as much carbon flowing from land to ocean than previously thought

"...After accounting for these effects, the authors were up for a surprise: they found much higher numbers for the land to ocean carbon transfer of 900-1900 million tons per year (see Figure). Most of non-riverine carbon inputs of about 300-1300 million tons of carbon per year occur mostly along the coastlines of the Indian and Pacific Oceans. "This is consistent with the idea that groundwater discharge and coastal ecosystems, the so-called blue carbon, play a fundamental role in the global carbon cycle" says Dr..."

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How the habitability of exoplanets is influenced by their rocks

"...IMAGE: Weathering of silicate rocks is part of the so-called carbon cycle that maintains a temperate climate on Earth over long periods of time. view more ..."

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Climate change damaging North America's largest temperate rainforest, harming salmon

"...The region can store more than 1,000 tons per hectare of carbon in biomass and soil. Although the area is extremely remote, researchers say it is not immune from the negative impacts of climate change. Glaciers are disappearing faster than most other places on Earth and winter snows are turning into winter rains..."

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First the treats, then the tough stuff: A bacterial dinner plan for degrading algal blooms

"...In other words, the bacteria take the easy road first, and only when the treats have been consumed, they aim for the chewy bits. When does this shift happen? Ben Francis and his colleagues see two possible triggers: It could either take place when competition for the easy food sources gets more intense, because the bacteria reproduce quickly in this lush environment and thus cell numbers increase. Or, alternatively, it depends more on the algae: Once the algal bloom breaks down and more algae have died, more of the hard substrates accumulate and they become a viable food source at that point..."

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Ecosystems across the globe 'breathe' differently in response to rising temperatures

"...The study, funded by the Leverhulme Trust, shows that ecosystem respiration doesn't rise as strongly with temperature in warmer (Mediterranean and tropical) climates compared to mild (temperate) climates but shows an extreme rise with temperature in cold (boreal and tundra) climates. This finding contradicts several studies showing a static temperature-respiration relationship globally but agrees with observations made within different ecosystems. First author Dr Alice Johnston, Lecturer in Environmental Data Science at Cranfield University, said: "Ecosystems are extremely complex, and there is massive variation in how many and what type of plants, animals and microbes are present in one field compared to the next let alone across global ecosystems..."

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Tool that more efficiently analyzes ocean color data will become part of NASA program

"...The OC-SMART software will now be incorporated into NASA's SeaDAS platform. Final products of the software include useful data on chlorophyll concentrations and the presence of phytoplankton and pollution, all helpful indicators of the ocean's state. Notably, Stamnes said, OC-SMART will be adapted to the upcoming NASA PACE mission scheduled to launch in 2023..."

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Fishes contribute roughly 1.65 billion tons of carbon in feces and other matter annually

"...The ocean plays a vital role in the Earth's carbon cycle by exchanging carbon dioxide, a key greenhouse gas linked to global warming and climate change, with the atmosphere. Carbon dioxide absorbed by the ocean is taken up by phytoplankton (algae), small single-celled plants at the ocean's surface. Through an important process called the biological pump, this organic carbon can go from the surface to ocean depths when algal material or fecal pellets from fishes and other organisms sink..."

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Recommended Reading

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Podcasts

Recent episodes that mention carbon cycle.

Scott Denning: Semester at Sea | The Global Carbon Cycle | From Geology to Atmospheric Science

Duration: 2:23:11

"...Professor Scott Denning from the Department of Atmospheric Science at Colorado State University joins me to talk about his semester teaching at sea, his research career working on the global carbon cycle (especially the atmospheric and land portions), and his pathway from geology into atmospheric science..."

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Anna Harper: the Land Carbon Cycle

Duration: 1:58:11

"...Lecturer Anna Harper on vegetation, climate change, and her pathway into science..."

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Corinne Le Quéré on the global carbon cycle

Duration: 27:00

"...Throughout the history of planet Earth, the element carbon has cycled between the atmosphere, the oceans and the biosphere..."

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Corinne Le Quéré on the global carbon cycle

Duration: 27:49

"...Throughout the history of planet Earth, the element carbon has cycled between the atmosphere, the oceans and the biosphere..."

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Informative Video

Discussions, Documentaries, and Investigative Reports about carbon cycle.

The Hydrologic and Carbon Cycles: Always Recycle! - Crash Course Ecology #8

"...The hydrologic cycle describes how water moves on, above, and below the surface of the Earth, driven by energy supplied by the sun and wind..."

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Forest Degradation — Mathias Disney / Serious Science

"...There's an ecosystem service to us selfishly but to all other organisms that depend on them, so there's been a lot of work again in trying to understand how we can map degradation rather than just purely deforestation. ' ..."

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Academic Research

Recent peer-reviewed papers about carbon cycle relevant to the latest news.

Greenhouse Gases Emissions in Agricultural Systems and Climate Change Effects in sub-Saharan Africa

"...A key cause of global warming is the increase in greenhouse gas emissions including methane, nitrous oxide, and carbon among others..."

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Carbon Footprint of Karnataka: Accounting of Sources and Sinks

"...The forests ecosystems account for ~82% of the continental biomass, a source for higher terrestrial carbon sequestration, playing a vital role in maintaining the carbon cycle and provision of various goods and services, which play a primary role in human?s socioeconomic development..."

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Valorization of Waste Biomass in Fermentative Production of Cellulases: A Review

"...The most promising way to achieve the smooth, flexible and sustainable bioeconomy is the utilization of renewable lignocellulosic biomass as a feedstock for the production of fuels, chemicals, enzymes and high-valued products..."

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Effects of elevated temperature on microbial breakdown of seagrass leaf and tea litter biomass

"...Seagrass ecosystems are globally-significant ?blue carbon? sinks; however, there is concern that this capacity will decline if rising ocean temperatures accelerate microbial decomposition..."

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Records of volcanism and organic carbon isotopic composition (δ13Corg) linked to changes in atmospheric pCO2 and climate during

"...Results suggest volcanism to be a significant driver for late Pennsylvanian to earliest Cisuralian shifts in global climates from glacial to interglacial through greenhouse gas emissions and changes to the global carbon cycle..."

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Characteristics of dissolved organic matter in lakes with different eutrophic levels in southeastern Hubei Province, China

"...This study helps us systematically understand the DOM characteristics, microbial activities, and pollutant transformation in the Changjiang River basin and provides reference to the ecological restoration of aquatic environments..."

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Thermochemical Solutions for CO 2 Utilization to Fuels and Value-Added Products

"...Growing energy demands for improved lifestyle and enhanced productivity has caused greater use of energy produced from fossil fuels, which in turn is leading to unsustainability with continuously increasing CO2 into the environment that causes significant impact to climate changes..."

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Estimation of karst carbon sink and its contribution to CO2 emissions over a decade using remote sensing imagery

"...Therefore, the results of this study not only help to understand the relationship between karst carbon sink and the global carbon cycle, but also provide an important basis for predicting the variations in CO2 in the atmosphere and climate change, which could further provide a scientific basis for the rational use of resources and the formulation of environmental protection policies..."

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Dynamics of organic carbon under bioturbation by mud crabs (Macrophthalmus japonicus) and clamworms (Perinereis aibuhitensis) in

"...Understanding of the dynamic characteristics of organic carbon in estuary ecosystem is of great significance for the carbon cycle in terrestrial and marine ecosystems..."

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Increasing climate sensitivity of subtropical conifers along an aridity gradient

"...Subtropical forests are an important but still poorly understood component of the global carbon cycle and global biodiversity..."

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Beyond trees: Mapping total aboveground biomass density in the Brazilian savanna using high-density UAV-lidar data

"...However, their ability to store and sequester carbon is uncertain due to combined and intermingling effects of anthropogenic activities and climate change, which impact wildfire regimes and vegetation dynamics..."

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Impacts of strengthened warming by urban heat island on carbon sequestration of urban ecosystems in a subtropical city of China

"...Urban heat island could strengthen the warming trend of air temperature and cause the change of carbon cycle of urban ecosystems..."

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