Video Experimental Relacionado
Updated: Jul 12, 2026

09:46
Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber
Published on: November 18, 2018
Capa de ácido sulfúrico estratosférico: evidencia de un componente antropogénico
Resumen
Las partículas de aerosoles estratosféricos sobre Wyoming muestran un aumento potencial del 9% anual, posiblemente relacionado con las emisiones humanas de azufre. Estas gotas de ácido sulfúrico pueden estar aumentando debido al aumento de la contaminación.
Área de la Ciencia:
- Ciencias de la atmósfera ciencia atmosférica.
- Las investigaciones estratosféricas en la estratosfera.
- La ciencia del aerosol es la ciencia del aerosol.
Sus antecedentes:
- Las partículas de aerosol estratosférico son predominantemente gotas de ácido sulfúrico.
- Estas partículas se forman a partir de gases troposféricos que contienen azufre.
- Las mediciones anteriores proporcionan una línea de base para la comparación.
Objetivo del estudio:
- Para analizar las mediciones recientes de partículas de aerosol estratosférico sobre Laramie, Wyoming.
- Para comparar las concentraciones actuales de aerosoles con los datos de hace aproximadamente 20 años.
- Investigar las posibles tendencias y causas de los cambios en los aerosoles estratosféricos.
Principales métodos:
- Mediciones in situ de pequeñas partículas de aerosoles en la estratosfera.
- Análisis comparativo de los datos históricos y recientes de concentración de aerosoles.
- Análisis de correlación con fuentes potenciales de emisiones de azufre.
Principales resultados:
- Mediciones recientes indican condiciones de fondo de baja concentración en la estratosfera.
- Una comparación sugiere un posible aumento anual del 9% en la concentración de partículas de aerosol.
- El aumento observado puede estar relacionado con las emisiones antropogénicas de azufre.
Conclusiones:
- Las condiciones de fondo de aerosoles estratosféricos pueden estar aumentando.
- Las emisiones de azufre producidas por el hombre son un impulsor potencial de este aumento observado.
- Se necesita más investigación para confirmar la tendencia y sus implicaciones.
Videos de Conceptos Relacionados
The Sulfur Cycle
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
Microbes and the Sulfur Cycle
Sulfur is a vital element in Earth's biogeochemical systems. It transitions through various inorganic states, including sulfate (SO₄²⁻), elemental sulfur (S⁰), and sulfide (S²⁻). Abiotic and biological mechanisms across oxic and anoxic environments intricately mediate these transformations. Sulfate, the most oxidized form of sulfur, is predominantly stored in rocks, marine sediments, and oceanic waters, acting as a long-term reservoir in the global sulfur cycle.In oxic environments,...
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.
Sulfur Assimilation
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...
Acid Mine Drainage
Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...
The Carbon Cycle
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.

