Video Experimental Relacionado

Updated: May 5, 2026

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

Restricciones sobre la contribución antropogénica del holoceno tardío al presupuesto de metano atmosférico

Logan Mitchell¹, Ed Brook, James E Lee

¹College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA.

Science (New York, N.Y.)

|November 23, 2013

Resumen

El aumento del metano en el Holoceno preindustrial tardío se debió tanto a fuentes humanas como naturales, principalmente en los trópicos. Este hallazgo resuelve los debates sobre el origen del aumento de las concentraciones de metano atmosférico durante este período.

Área de la Ciencia:

Paleoclimatología Paleoclimatología
Química de la atmósfera química de la atmósfera
La geoquímica es la geoquímica.

Sus antecedentes:

El aumento del metano atmosférico durante el Holoceno preindustrial tardío (LPIH) es un evento climático significativo.
Las hipótesis anteriores atribuían este aumento únicamente a fuentes antropogénicas o naturales, y carecían de consenso.

Objetivo del estudio:

Investigar el origen y la distribución latitudinal de las emisiones de metano durante el LPIH.
Determinar las contribuciones relativas de las fuentes antropogénicas y naturales al aumento de metano observado.

Principales métodos:

Análisis de dos registros de alta resolución y alta precisión de concentración de metano en núcleos de hielo de Groenlandia y la Antártida.
Construcción de un registro de diferencia interpolar de metano (IPD) de alta resolución para inferir las ubicaciones de emisión.

Principales resultados:

El registro de IPD indica que las emisiones de metano de LPIH se originaron predominantemente en los trópicos.
Se identificaron aumentos de emisiones secundarias en el hemisferio norte subtropical.
Se utilizaron los distintos patrones latitudinales de las fuentes antropogénicas y naturales.

Conclusiones:

Tanto las fuentes antropogénicas como las naturales de metano fueron esenciales para impulsar el aumento de la concentración de LPIH.
El estudio concilia hipótesis contradictorias mediante la integración de información latitudinal específica de la fuente.

Más Videos Relacionados

Visualizing Methane-Cycling Microbial Dynamics in Coastal Wetlands

Visualizing Methane-Cycling Microbial Dynamics in Coastal Wetlands

Published on: January 31, 2025

Measuring Dissolved Methane in Aquatic Ecosystems Using An Optical Spectroscopy Gas Analyzer

Measuring Dissolved Methane in Aquatic Ecosystems Using An Optical Spectroscopy Gas Analyzer

Published on: July 26, 2024

Videos de Conceptos Relacionados

Microbes and Climate Change

Microbes and Climate Change

Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...

Global Climate Change

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.

Microbes and Methanogenesis

Microbes and Methanogenesis

Methanogenesis is a critical microbial process in anaerobic ecosystems responsible for the biological production of methane, a potent greenhouse gas and valuable biofuel. This metabolic pathway is primarily facilitated by methanogenic archaea, which thrive in anoxic environments such as wetlands, sediments, and animal gastrointestinal tracts. The absence of oxygen in these habitats prevents aerobic respiration, thereby favoring alternative biochemical pathways for organic matter degradation.In...

Limiting Reactant

Limiting Reactant

The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts. However, in reality, the reactants are not always present in the stoichiometric amounts indicated by the balanced equation.

Overview of Archaea

Overview of Archaea

Archaea, named after the Archaean eon, represent a unique domain of life, distinct from bacteria and eukaryotes, with remarkable traits. Their cellular and molecular features, ecological adaptability, and industrial relevance highlight their importance in understanding life processes and leveraging biotechnology.Cellular and Molecular CharacteristicsA defining feature of archaea is their unique membrane composition. Archaeal membranes contain ether-linked isoprenoid lipids, which confer...

Threats to Biodiversity

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...