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相关概念视频

The Carbon Cycle01:14

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.
What is Weather?01:07

What is Weather?

Overview
What is Climate?01:16

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 Change01:50

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.
Ecological Disturbance02:26

Ecological Disturbance

An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.Ecological disturbances can be caused by an event as small as the trampling of underbrush to an incident as wide-ranging as a forest...
Microbes and Climate Change01:27

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...

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相关实验视频

Updated: Jul 5, 2026

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
07:32

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.

Published on: June 4, 2021

超级ENSO和全球气候在千年时间尺度上的振荡.

Lowell Stott1, Christopher Poulsen, Steve Lund

  • 1Department of Earth Sciences, University of Southern California, 3651 Trousdale Parkway, Los Angeles, CA 90089, USA. stott@usc.edu

Science (New York, N.Y.)
|July 13, 2002
PubMed
概括
此摘要是机器生成的。

晚期普莱斯托时代太平洋盐度波动与格陵兰的盐度波动.

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相关实验视频

Last Updated: Jul 5, 2026

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
07:32

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.

Published on: June 4, 2021

Simulating Temperature in a Soil Incubation Experiment
08:39

Simulating Temperature in a Soil Incubation Experiment

Published on: October 28, 2022

Using Generative Art to Convey Past and Future Climate Transitions
06:10

Using Generative Art to Convey Past and Future Climate Transitions

Published on: March 31, 2023

科学领域:

  • 古海洋学是古海洋学.
  • 气候科学 气候科学
  • 海洋地质 海洋地质学

背景情况:

  • 了解热带太平洋过去的气候变化对于解释全球气候动态至关重要.
  • 西太平洋温暖的水池是全球热量和湿度传输的关键区域.

研究的目的:

  • 为了重建平纪晚期海水温度和盐度在西热带太平洋温暖的游泳池.
  • 研究热带太平洋条件与高度气候周期之间的关系.

主要方法:

  • 在浮游生物中分析氧同位素 (delta18O) 和/组成.
  • 石灰岩delta18O记录的解卷以分离温度和局部水delta18O信号.

主要成果:

  • 确定了一个主要的盐度信号,与格陵兰的丹斯加尔德/奥什格尔周期有很强的相关性.
  • 较高的盐度发生在高度冷却 (阶段) 期间,较低的盐度发生在更温暖的阶段间.
  • 盐度变化表明热带太平洋大气转移类似于现代的厄尔尼诺-南方振荡 (ENSO),厄尔尼诺与体育场相对应,拉尼娜与体育场之间相对应.

结论:

  • 大气对流的千年级变化影响了西热带太平洋.
  • 这些转变与体育场期间大气中较低的温室气体 (CO2,N2O,CH4) 相对应.
  • 观察到的热带以外海洋变化模式与热带太平洋的动态相一致,与厄尔尼诺相负相关.