层层空气的入侵促进了全球范围内的新粒子形成.
在PubMed上查看摘要
概括
此摘要是机器生成的。层层空气的入侵引发了新粒子在自由的热层中形成. 这种由二氧化硫和基水平升高所驱动的过程产生了云凝结核.
科学领域
- 大气化学
- 气溶科学
- 气候科学
背景情况
- 在全球范围内,自由热带层的新粒子形成是云凝聚核 (CCN) 的主要来源.
- 目前的理解表明粒子形成主要发生在对流云外流中.
研究的目的
- 在自由热层中研究新的粒子形成的替代机制.
- 确定平流层空气入侵在大气颗粒产生中的作用.
主要方法
- 全球观测数据的分析.
- 确定平流层空气入侵事件.
- 大气组成 (SO2,OH,臭氧) 与粒子形成的相关性.
主要成果
- 层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层
- 这种混合导致基 (OH) 度升高.
- 高二氧化硫 (SO2) 和OH水平增加了硫酸的形成,推动了粒子的形成.
结论
- 在中度的自由热带层中,层层空气的入侵是新粒子形成的重要,广泛的机制.
- 这一途径为全球CCN预算做出了重大贡献.
- 通过突出非对流性粒子形成途径,
相关概念视频
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.
Past Periods of Warming and Cooling
In...
Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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...

