Videos de Conceptos Relacionados
01:50Global 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.
01:16What is Climate?
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.
01:27Microbes 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...
01:14The 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.
00:59Uncertainty: Overview
In analytical chemistry, we often perform repetitive measurements to detect and minimize inaccuracies caused by both determinate and indeterminate errors. Despite the cares we take, the presence of random errors means that repeated measurements almost never have exactly the same magnitude. The collective difference between these measurements - observed values - and the estimated or expected value is called uncertainty. Uncertainty is conventionally written after the estimated or expected value.
02:44Heating and Cooling Curves
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
También podría leer
Artículos Relacionados
Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.
Ordenar por
Same author
PLANETARY SCIENCE: Beating Up on a Young Earth, and Possibly Life.
Science (New York, N.Y.)·2007
Video Experimental Relacionado
Updated: Jul 12, 2026
06:10
Using Generative Art to Convey Past and Future Climate Transitions
Published on: March 31, 2023
Calentamiento de invernadero: modelos de duelo: el futuro de los EE.UU. El clima es incierto.
Science (New York, N.Y.)
|August 31, 2007
Resumen
Una evaluación nacional de los Estados Unidos confirma que los Estados Unidos se calentarán, lo que afectará a los recursos hídricos y al follaje estacional. Sin embargo, la actual ciencia climática regional limita las predicciones detalladas para los responsables de la formulación de políticas.
Área de la Ciencia:
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- Ciencias ambientales Ciencias ambientales.
Sus antecedentes:
- Las evaluaciones climáticas nacionales utilizan predicciones de modelos para pronosticar futuros cambios climáticos.
- Comprender los impactos regionales es crucial para el desarrollo de políticas y estrategias de adaptación.
Objetivo del estudio:
- Para evaluar las tendencias de calentamiento proyectadas en los Estados Unidos.
- Identificar las limitaciones de la ciencia climática regional actual para proporcionar predicciones detalladas.
Principales métodos:
- Análisis de las predicciones del modelo climático nacional de los Estados Unidos.
- Evaluación de la granularidad de los impactos regionales del cambio climático.
Principales resultados:
- Se prevé que Estados Unidos experimente un calentamiento significativo.
- Los impactos detallados y localizados del cambio climático siguen siendo inciertos debido al estado actual de la ciencia climática regional.
Conclusiones:
- Si bien las tendencias nacionales de calentamiento son evidentes, las proyecciones regionales precisas aún no son factibles.
- Se necesitan avances adicionales en la ciencia climática regional para informar las decisiones políticas detalladas.