Photoacoustic spectrometer with a calculable cell constant for accurate absorption measurements of atmospheric aerosols and greenhouse gases

2011 ◽  
Vol 130 (4) ◽  
pp. 2515-2515
Author(s):  
Keith A. Gillis ◽  
Joseph T. Hodges
Keyword(s):  
Greenhouse Gases ◽  
Atmospheric Aerosols ◽  
Cell Constant ◽  
Photoacoustic Spectrometer ◽  
Absorption Measurements

scholarly journals Climate Change and Aerosol Sciences

2021 ◽  
pp. 1-13
Author(s):  
Kehan Li
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Particulate Matter ◽  
Environmental Policy ◽  
Solar Radiation ◽  
Greenhouse Gases ◽  
Atmospheric Aerosols ◽  
Environmental Policies ◽  
Modern Times

Climate change is of great importance in modern times and global warming is considered as a significant part of climate change. It is proved that human’s emissions such as greenhouse gases are one of the main sources of global warming (IPCC, 2018). Apart from greenhouse gases, there is another kind of matter being released in quantity via emissions from industries and transportations and playing an important role in global warming, which is aerosol. However, atmospheric aerosols have the net effect of cooling towards global warming. In this paper, climate change with respect to global warming is briefly introduced and the role of aerosols in the atmosphere is emphasized. Besides, properties of aerosols including dynamics and thermodynamics of aerosols as well as interactions with solar radiation are concluded. In the end, environmental policies and solutions are discussed. Keywords: Climate change, Global warming, Atmospheric aerosols, Particulate matter, Radiation, Environmental policy.

Atmospheric aerosols versus greenhouse gases in the twenty-first century

2007 ◽  
Vol 365 (1856) ◽  
pp. 1915-1923 ◽  
Author(s):  
Meinrat O Andreae
Keyword(s):  
Greenhouse Gases ◽  
Atmospheric Aerosols ◽  
Water Cycle ◽  
Regional Climate ◽  
High Sensitivity ◽  
Regional Climate Change ◽  
Climate System ◽  
First Century ◽  
Past Century ◽  
Climate Protection

Looked at in a simplistic way, aerosols have counteracted the warming effects of greenhouse gases (GHG) over the past century. This has not only provided some ‘climate protection’, but also prevented the true magnitude of the problem from becoming evident. In particular, it may have resulted in an underestimation of the sensitivity of the climate system to the effect of GHG. Over the present century, the role of aerosols in opposing global warming will wane, as there are powerful policy reasons to reduce their emissions and their atmospheric lifetimes are short in contrast to those of the GHG. On the other hand, aerosols will continue to play a role in regional climate change, especially with regard to the water cycle. The end of significant climate protection by atmospheric aerosols, combined with the potentially very high sensitivity of the climate system, makes sharp and prompt reductions in greenhouse gas emissions, especially CO 2 , very urgent.

Photoacoustic Spectrometer with a Calculable Cell Constant for Measurements of Gases and Aerosols†

2010 ◽  
Vol 82 (19) ◽  
pp. 7935-7942 ◽  
Author(s):  
Daniel K. Havey ◽  
Pedro A. Bueno ◽  
Keith A. Gillis ◽  
Joseph T. Hodges ◽  
George W. Mulholland ◽  
...  
Keyword(s):  
Cell Constant ◽  
Photoacoustic Spectrometer

2. Atmospheric physics

2017 ◽  
pp. 20-48
Author(s):  
Paul I. Palmer
Keyword(s):  
Greenhouse Gases ◽  
Atmospheric Aerosols ◽  
Electrical Energy ◽  
Radiation Budget ◽  
Radiative Energy ◽  
The Sun ◽  
Atmospheric Physics ◽  
Emit Radiation ◽  
Wide Range ◽  
Earth’S Radiation Budget

Earth’s atmosphere is tied closely with the Sun. The Sun emits electromagnetic radiation at a wide range of wavelengths. Radiation is transported through the atmosphere by transmission, absorption, and scattering. ‘Atmospheric physics’ outlines the Earth’s radiation budget—the incoming and outgoing radiation, equilibrium between them, and departures from this equilibrium due to increasing levels of clouds, greenhouse gases, and atmospheric aerosols. It then describes the greenhouse gases that absorb and emit radiation and the thermodynamics of the atmosphere. The importance of water, the dominant atmospheric constituent responsible for the loss of radiative energy to space and hence atmospheric cooling, and the electrical energy stored in the atmosphere are also discussed.

scholarly journals Remote Measurements of Actinide Species in Aqueous Solutions Using an Optical Fiber Photoacoustic Spectrometer

1990 ◽  
Vol 212 ◽  
Author(s):  
Richard E. Russo ◽  
Piotr B. Robouch ◽  
Robert J. Silva
Keyword(s):  
Optical Fiber ◽  
Aqueous Solutions ◽  
Photoacoustic Spectrometer ◽  
Remote Measurements ◽  
Absorption Measurements

ABSTRACTA photoacoustic spectrometer, equipped with an 85 meter optical fiber, was used to perform absorption measurements of lanthanide and actinide samples, located in a glovebox. The spectrometer was tested using aqueous solutions of praseodymium and americium ions; the sensitivity for remote measurements was found to be similar to that achieved in the laboratory without the fiber.

Response of the climate system to atmospheric aerosols and greenhouse gases

Nature ◽  
1994 ◽  
Vol 369 (6483) ◽  
pp. 734-737 ◽  
Author(s):  
K. E. Taylor ◽  
J. E. Penner
Keyword(s):  
Greenhouse Gases ◽  
Atmospheric Aerosols ◽  
Climate System

scholarly journals Assessing relative humidity dependent photoacoustics to retrieve mass accommodation coefficients of single optically trapped aerosol particles

2019 ◽  
Vol 21 (9) ◽  
pp. 4721-4731 ◽  
Author(s):  
Matus E. Diveky ◽  
Sandra Roy ◽  
Johannes W. Cremer ◽  
Grégory David ◽  
Ruth Signorell
Keyword(s):  
Relative Humidity ◽  
Atmospheric Aerosols ◽  
Photoacoustic Spectroscopy ◽  
Aerosol Particles ◽  
Accommodation Coefficients ◽  
Humidity Dependence ◽  
Optically Trapped ◽  
Evaporation Kinetics ◽  
Absorption Measurements

Photoacoustic spectroscopy is a standout technique widely used for absorption measurements of atmospheric aerosols. Here we investigate the relative humidity dependence of photoacoustics and its implication for evaporation kinetics.

Sign in / Sign up

Export Citation Format

Share Document