相关实验视频

Updated: May 24, 2025

Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer
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Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer

Published on: May 29, 2019

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北极热层臭氧季节性,枯竭和油田影响影响北极热层臭氧季节性,枯竭和油田影响北极热层臭氧季节性

Evelyn M Widmaier1, Andrew R Jensen1, Kerri A Pratt1,2

  • 1Department of Chemistry, University of Michigan, Ann Arbor, MI, USA. prattka@umich.edu.

Faraday discussions
|March 5, 2025
PubMed
概括

春季北极臭氧损耗事件 (ODEs) 是频繁且广泛的,由化学驱动. 来自油田的燃烧排放也会全年影响当地臭氧水平.

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Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber09:46

Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber

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Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

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相关概念视频

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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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Oxidative Cleavage of Alkenes: Ozonolysis01:46

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In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
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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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An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
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Primary Production01:06

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The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
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