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Optical and Single Particle Properties of North Atlantic Free Tropospheric Aerosols and Implications for Aerosol Direct Radiative Forcing.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Optical and Single Particle Properties of North Atlantic Free Tropospheric Aerosols and Implications for Aerosol Direct Radiative Forcing./
Author:	Morgenstern, Megan E.
Description:	1 online resource (38 pages)
Notes:	Source: Masters Abstracts International, Volume: 83-11.
Contained By:	Masters Abstracts International83-11.
Subject:	Atmospheric sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29162060click for full text (PQDT)
ISBN:	9798438757795

Optical and Single Particle Properties of North Atlantic Free Tropospheric Aerosols and Implications for Aerosol Direct Radiative Forcing.
Morgenstern, Megan E.

Optical and Single Particle Properties of North Atlantic Free Tropospheric Aerosols and Implications for Aerosol Direct Radiative Forcing. - 1 online resource (38 pages)

Source: Masters Abstracts International, Volume: 83-11.

Thesis (M.S.)--Michigan Technological University, 2022.

Includes bibliographical references

Human-induced climate change has steadily become a reality rather than a possibility. One factor that plays into climate change is radiative forcing due to aerosol-radiation interactions (ARI). As such, it is important to understand how aerosols (atmospheric particles) interact with solar radiation. This work looks at seven samples of well-aged aerosols (aerosols traveling in the atmosphere for at least a few days) collected at Pico Mountain Observatory in the summer of 2015. Pico Mountain Observatory is located in a remote, high elevation site in the Azores, in the Eastern-North Atlantic Ocean. The goals of the study were to analyze the physicochemical properties of these atmospheric particles and to unravel potential relations with their radiative properties.From single particle analysis, it was found that all samples contained predominantly carbon-based aerosols, with smaller amounts of sea salt and mineral dust observed in some samples. Modeled atmospheric transport paths indicated most sampled particles came from North America with long transport times. The particles in all samples were internally mixed, further supporting the expectation and modeling findings that the sampled particles were well-aged.Two selected samples, one dominated by biomass burning, and a second affected by mineral dust, were compared in more detail. Radiative forcing calculations have been performed for the particles collected during two events. The calculations were performed for two scenarios with different reflectances of the surfaces underneath: clear sky ocean and clouds. It was found that there is potential cooling over areas of low albedo, such as the clear sky ocean, and potential warming over areas of high albedo, such as above clouds.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798438757795Subjects--Topical Terms:

3168354
Atmospheric sciences.
Subjects--Index Terms:

AerosolsIndex Terms--Genre/Form:

542853
Electronic books.

Optical and Single Particle Properties of North Atlantic Free Tropospheric Aerosols and Implications for Aerosol Direct Radiative Forcing.
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520 $a Human-induced climate change has steadily become a reality rather than a possibility. One factor that plays into climate change is radiative forcing due to aerosol-radiation interactions (ARI). As such, it is important to understand how aerosols (atmospheric particles) interact with solar radiation. This work looks at seven samples of well-aged aerosols (aerosols traveling in the atmosphere for at least a few days) collected at Pico Mountain Observatory in the summer of 2015. Pico Mountain Observatory is located in a remote, high elevation site in the Azores, in the Eastern-North Atlantic Ocean. The goals of the study were to analyze the physicochemical properties of these atmospheric particles and to unravel potential relations with their radiative properties.From single particle analysis, it was found that all samples contained predominantly carbon-based aerosols, with smaller amounts of sea salt and mineral dust observed in some samples. Modeled atmospheric transport paths indicated most sampled particles came from North America with long transport times. The particles in all samples were internally mixed, further supporting the expectation and modeling findings that the sampled particles were well-aged.Two selected samples, one dominated by biomass burning, and a second affected by mineral dust, were compared in more detail. Radiative forcing calculations have been performed for the particles collected during two events. The calculations were performed for two scenarios with different reflectances of the surfaces underneath: clear sky ocean and clouds. It was found that there is potential cooling over areas of low albedo, such as the clear sky ocean, and potential warming over areas of high albedo, such as above clouds.
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