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What is Climate?

What 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.

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.

Conditions on Early Earth

Conditions on Early Earth

Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.

Cause and Effect

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While variables are sometimes correlated because one does cause the other, it could also be that some other factor, a confounding variable, is actually causing the systematic movement in our variables of interest. For instance, as sales in ice cream increase, so does the overall rate of crime. Is it possible that indulging in your favorite flavor of ice cream could send you on a crime spree? Or, after committing crime do you think you might decide to treat yourself to a cone?

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Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.

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El paleoclima: un problema de causalidad para Milankovitch

D B Karner, R A Muller

Science (New York, N.Y.)

|August 31, 2007

Resumen

Este resumen es generado por máquina.

La teoría de Milankovitch sugiere que la insolación del hemisferio norte impulsa los ciclos glaciales. Sin embargo, estudios recientes de corales cuestionan su papel en la penúltima terminación de la glaciación, lo que provocó una reevaluación de los datos.

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Área de la Ciencia:

Paleoclimatología Paleoclimatología
La geofísica es la geofísica.

Sus antecedentes:

La teoría de Milankovitch postula que las variaciones en la radiación solar (insolación) en el hemisferio norte son los principales impulsores de los ciclos glaciales globales.
Comprender las terminaciones glaciales es crucial para reconstruir la historia climática de la Tierra.

Objetivo del estudio:

Evaluar la aplicabilidad de la teoría de Milankovitch al final de la penúltima glaciación.
Para discutir los hallazgos recientes de los estudios mundiales de coral que pueden desafiar los modelos climáticos existentes.

Principales métodos:

Revisión de estudios recientes sobre datos de corales de varias ubicaciones del mundo.
Análisis de los datos de insolación y su correlación con los períodos glaciales.

Principales resultados:

Estudios recientes de corales presentan evidencia que arroja dudas sobre la aplicabilidad directa de la teoría de Milankovitch a la penúltima terminación glacial.
Se destacaron las discrepancias entre los datos paleoclimáticos y las predicciones teóricas.

Conclusiones:

La comprensión actual de los mecanismos del ciclo glacial, en particular las terminaciones, puede requerir una revisión.
Es necesario un reexamen crítico e imparcial de los datos paleoclimáticos existentes para refinar los modelos climáticos.