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Global Climate Change01:50

Global Climate Change

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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.
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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...
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What is Climate?01:16

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Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
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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...
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The Carbon Cycle01:14

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Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
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The Fossil Record02:56

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The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
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Using Generative Art to Convey Past and Future Climate Transitions
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Definiendo el antropoceno.

Simon L Lewis1, Mark A Maslin2

  • 11] Department of Geography, University College London, Gower Street, London, WC1E 6BT, UK [2] School of Geography, University of Leeds, Leeds, LS2 9JT, UK.

Nature
|March 13, 2015
PubMed
Resumen
Este resumen es generado por máquina.

El Antropoceno, una nueva época geológica propuesta definida por el impacto humano, puede haber comenzado en 1610 o 1964. La evidencia de firmas humanas en el registro geológico de la Tierra apoya estas fechas de inicio potenciales para esta era ambiental significativa.

Área de la Ciencia:

  • Ciencias de la Tierra Ciencias de la Tierra Ciencias de la Tierra
  • Geología Geología Geología.
  • Ciencias ambientales Ciencias ambientales.

Sus antecedentes:

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  • El tiempo geológico está demarcado históricamente por cambios significativos en el estado de la Tierra.
  • Los cambios ambientales globales impulsan la consideración de una nueva época dominada por el hombre: el Antropoceno.