scholarly journals Field evidence for coal combustion links the 252 Ma Siberian Traps with global carbon disruption: REPLY

Geology ◽  
2021 ◽  
Vol 49 (3) ◽  
pp. e518-e518
Author(s):  
Linda T. Elkins-Tanton ◽  
S.E. Grasby ◽  
B.A. Black ◽  
R.V. Veselovskiy ◽  
O.H. Ardakani ◽  
...  
Geology ◽  
2020 ◽  
Vol 48 (10) ◽  
pp. 986-991 ◽  
Author(s):  
L.T. Elkins-Tanton ◽  
S.E. Grasby ◽  
B.A. Black ◽  
R.V. Veselovskiy ◽  
O.H. Ardakani ◽  
...  

Abstract The Permian-Triassic extinction was the most severe in Earth history. The Siberian Traps eruptions are strongly implicated in the global atmospheric changes that likely drove the extinction. A sharp negative carbon isotope excursion coincides within geochronological uncertainty with the oldest dated rocks from the Norilsk section of the Siberian flood basalts. We focused on the voluminous volcaniclastic rocks of the Siberian Traps, relatively unstudied as potential carriers of carbon-bearing gases. Over six field seasons we collected rocks from across the Siberian platform, and we show here the first direct evidence that the earliest eruptions in the southern part of the province burned large volumes of a combination of vegetation and coal. We demonstrate that the volume and composition of organic matter interacting with magmas may explain the global carbon isotope signal and may have significantly driven the extinction.


Geology ◽  
2021 ◽  
Vol 49 (3) ◽  
pp. e517-e517
Author(s):  
Vladimir I. Davydov ◽  
Eugeny V. Karasev ◽  
Veronika V. Zharinova

2021 ◽  
Author(s):  
Linda Elkins-Tanton ◽  
Steven Grasby ◽  
Benjamin Black ◽  
Roman Veselovskiy ◽  
Omid Ardakani ◽  
...  

<p>The Permo-Triassic Extinction was the most severe in Earth history. The Siberian Traps eruptions are strongly implicated in the global atmospheric changes that likely drove the extinction. A sharp negative carbon isotope excursion coincides within geochronological uncertainty with the oldest dated rocks from the Norilsk section of the Siberian flood basalts. The source of this light carbon has been debated for decades.</p><p>We focused on the voluminous volcaniclastic rocks of the Siberian Traps, relatively unstudied as potential carriers of carbon-bearing gases. Over six field seasons we collected rocks from across the Siberian platform and show the first direct evidence that the earliest eruptions particularly in the southern part of the province burned large volumes of a combination of vegetation and coal. Samples from the Maymecha-Kotuy region, from the Nizhnyaya Tunguska, Podkamennaya Tunguska, and Angara Rivers all show evidence of high-temperature organic matter carbonization and combustion.</p><p>Field evidence indicates a process in which ascending magmas entrain xenoliths of coal and carbonaceous sediments that are carbonized in the subsurface and also combusted either through reduction of magmas or when exposed to the atmosphere. We demonstrate that the volume and composition of organic matter interactions with magmas may explain the global carbon isotope signal, and have significantly driven the extinction.</p>


2014 ◽  
Vol 126 (2) ◽  
pp. 40
Author(s):  
Linda Selvey

It is worth remembering that perhaps the biggest health impact of mining and burning coal today is the impact on our climate due to the CO2 that will be released from coal combustion. At Copenhagen in December 2009, world leaders agreed on a target of 2°C warming. At current global emissions we are way off that target, and are set for at least 4°C warming by 2100. If we are going to meet the 2°C degree target, then the world can only emit 1000 billion tonnes of CO2 between 2000 and 2050. In the first 13 years of the century, we’ve already burned 40% of that. If we were to mine and then burn Australia’s known coal reserves, on their own, would use up one-twelfth of the remaining global carbon budget. Whether we burn our coal here or sell it to China, it’s all the same to the atmosphere


Author(s):  
James S. Webber

INTRODUCTION“Acid rain” and “acid deposition” are terms no longer confined to the lexicon of atmospheric scientists and 1imnologists. Public awareness of and concern over this phenomenon, particularly as it affects acid-sensitive regions of North America, have increased dramatically in the last five years. Temperate ecosystems are suffering from decreased pH caused by acid deposition. Human health may be directly affected by respirable sulfates and by the increased solubility of toxic trace metals in acidified waters. Even man's monuments are deteriorating as airborne acids etch metal and stone features.Sulfates account for about two thirds of airborne acids with wet and dry deposition contributing equally to acids reaching surface waters or ground. The industrial Midwest is widely assumed to be the source of most sulfates reaching the acid-sensitive Northeast since S02 emitted as a byproduct of coal combustion in the Midwest dwarfs S02 emitted from all sources in the Northeast.


2017 ◽  
Vol 1 (1) ◽  
pp. 1-5
Author(s):  
Doma Tshering Sherpa

This case demonstrates the utility of the 3Es (effectiveness, efficiency, and equity) in examining Reducing Emissions from Deforestation and Forest Degradation (REDD+) project in Nepal. REDD+ offers results-based payments for conserving and managing forests sustainably and enhancing forest carbon stocks. This will benefit communities’ efforts to conserve forest resources and prevent deforestation; conserving integrity of forests in turn benefits the global carbon budget. This case uses the 3Es to examine one case in Nepal of distributing the REDD+ funds among local participants. Of the 3Es, equity is getting attention worldwide but there is still debate on which principle of 3Es should be given priority to achieve overall effectiveness of REDD+. This case finds that equity is a fundamental requirement to achieve the other Es (efficiency and effectiveness) in REDD+ implementation. Further, I find that distributive equity is the most important and understood in three different ways in Nepal: rights, needs, and performance. There is an argument between communities and experts on which equity should be given priority. I recommend that the issue of needs based equity vs. performance-based equity should be solved by formation of guidelines of sharing benefits at two levels. First, the benefit distribution from international sources/markets to community forest user groups should be based on the ownership of carbon and performance of communities participating in REDD+. Second, at community level, communities should decide on the form of benefit distribution according to their needs. The primacy of equity in this case will likely find international echoes in other environmental policies and in other countries.


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