Improving Characterization of Aerosol Optical Properties: Combined Measurements of Angle-resolved Scattering and Ultraviolet-visible Absorption

改善气溶胶光学特性的表征：角度分辨散射和紫外-可见光吸收的组合测量

• 批准号: 1638307
• 负责人: Geoffrey Smith
• 金额: $ 48.98万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1638307&HistoricalAwards=false
• 关键词: Improving; Characterization; Aerosol; Optical; Properties

This project focuses on the development of new instrumentation for measuring the optical properties of atmospheric aerosol. These instruments will provide measurements of light scattering and absorption by aerosols and enable better characterization of soot particles and particles containing black and brown carbon. A better understanding of the optical properties of atmospheric aerosol is needed for more accurate ground-based and satellite retrievals of data on atmospheric aerosols and for developing improved global climate models.This research will: (1) build a portable 3-wavelength polar nephelometer to measure light scattering by particles as a function of angle and light polarization; (2) expand the capabilities for measuring ambient aerosol absorption by adding a near-IR channel to a photoacoustic spectrophotometer (PAS), building a UV PAS instrument, and constructing a thermodenuder to better measure the black and brown carbon components of absorption, and (3) more accurately measure the optical properties of soot (black and black carbon) and especially those properties associated with aerosol coatings.

该项目的重点是开发用于测量大气气溶胶光学特性的新仪器。 这些仪器将提供气溶胶对光散射和吸收的测量，并能够更好地表征烟尘颗粒和含有黑色和棕色碳的颗粒。为了更准确地反演大气气溶胶的地面和卫星数据，以及发展更好的全球气候模式，需要更好地了解大气气溶胶的光学特性，本研究将：（1）建立一个便携式三波长极散射浊度计，测量粒子光散射随角度和光偏振的变化;（2）通过在光声分光光度计（PAS）中增加近红外通道、建造紫外PAS仪器和建造热扩散器来扩大测量环境气溶胶吸收的能力，以更好地测量吸收的黑碳和棕碳成分，以及（3）更精确地测量烟灰（黑和炭黑）的光学性质，特别是与气溶胶涂层相关的那些性质。

项目成果

Can ozone be used to calibrate aerosol photoacoustic spectrometers?

臭氧可以用来校准气溶胶光声光谱仪吗？

• DOI: 10.5194/amt-11-6419-2018
• 发表时间: 2018
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: Fischer, D. Al;Smith, Geoffrey D.
• 通讯作者: Smith, Geoffrey D.

Spectroscopic comparison of water- and methanol-soluble brown carbon particulate matter

• DOI: 10.1080/02786826.2017.1334109
• 发表时间: 2017-01-01
• 期刊: AEROSOL SCIENCE AND TECHNOLOGY
• 影响因子: 5.2
• 作者: Phillips, Sabrina M.;Smith, Geoffrey D.
• 通讯作者: Smith, Geoffrey D.

Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition

• DOI: 10.1073/pnas.1919723117
• 发表时间: 2020-03-10
• 期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• 影响因子: 11.1
• 作者: Fierce, Laura;Onasch, Timothy B.;Wolff, Lindsay
• 通讯作者: Wolff, Lindsay

A portable, four-wavelength, single-cell photoacoustic spectrometer for ambient aerosol absorption

• DOI: 10.1080/02786826.2017.1413231
• 发表时间: 2018-01-01
• 期刊: AEROSOL SCIENCE AND TECHNOLOGY
• 影响因子: 5.2
• 作者: Al Fischer, D.;Smith, Geoffrey D.
• 通讯作者: Smith, Geoffrey D.

Discrepancies between brown carbon light-absorption properties retrieved from online and offline measurements

• DOI: 10.1080/02786826.2020.1820940
• 发表时间: 2020-10-01
• 期刊: AEROSOL SCIENCE AND TECHNOLOGY
• 影响因子: 5.2
• 作者: Cheng, Zezhen;Atwi, Khairallah;Saleh, Rawad
• 通讯作者: Saleh, Rawad