Changes in Biomass Burning Aerosol Radiative Properties Due to Atmospheric Processing of Wildfire Plumes Over the Northwestern United States
Changes in Biomass Burning Aerosol Radiative Properties Due to Atmospheric Processing of Wildfire Plumes Over the Northwestern United States
批准号:
1926817
负责人:
Rajan Chakrabarty
金额:
$41.09万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2019
资助国家:
美国
项目状态:
已结题
起止时间:
2019-08-01 至 2023-07-31
中文摘要
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英文摘要
This study will provide new insights about the chemical and physical properties of wildfire smoke. Ground-based measurements using state-of-the-art optical instrumentation will provide data on the aerosol optical and physico-chemical properties from wildfires and prescribed burns in the northwestern United States as part of an interagency collaborative field campaign (FIREX-AQ) funded by NOAA and NASA. A better understanding of the properties of smoke aerosol will improve both air quality and climate models. During the summer in 2019, a dual-cell, multi-wavelength integrated photoacoustic-nephelometer spectrometer and a portable asymmetry parameter monitor will be deployed to Boise Idaho for 4 weeks to characterize and constrain aerosol spectral optical properties as a function of fire phase, wildland fuel type, and daytime and nighttime aging of smoke. Controlled heterogeneous oxidation experiments of organic aerosol will be performed during select smoldering phase episodes using a Potential Aerosol Mass (PAM) oxidation flow tube reactor, which creates a highly oxidizing environment that simulates atmospheric oxidation processes on timescales ranging from a day up to several weeks in a short period of a few minutes. Some of the research questions that will be investigated as part of this study include the following: (1) How do the aerosol optical properties, scattering and absorption cross-sections, single scattering albedo, Angstrom exponent, and asymmetry parameter evolve with varying oxidation states, size, hygroscopicity, wildland fuel type and fire phase? (2) How do the wavelength-dependent complex refractive indices of light absorbing organic aerosol change with different degrees of atmospheric processing? (3) What is the contribution of the water-soluble organic carbon to absorption by organic aerosol? (4) What are the enhancement factors for mass absorption and scattering cross-sections of black carbon upon various degrees of internal mixing with organic aerosol? (5) Could mechanistic insight and simpler parameterizations using the concept of scaling laws be obtained for integration in process-based models? And (6) Can generalized inferences be deduced regarding distinctive and differentiating properties of organic aerosol microphysical and optical properties from real-world versus laboratory burns?This project includes several outreach activities, such as summer teacher training workshops for middle and high school teachers on air pollution.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
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Assessing the magnitude of PM2.5 polycyclic aromatic hydrocarbon emissions from residential solid fuel combustion and associated health hazards in South Asia
评估南亚住宅固体燃料燃烧产生的 PM2.5 多环芳烃排放量及相关健康危害
DOI:
10.1016/j.apr.2021.101142
发表时间:
2021
期刊:
Atmospheric Pollution Research
影响因子:
4.5
作者:
[Verma, Madhuri, Pervez, Shamsh, Chow, Judith C., Majumdar, Dipanjali, Watson, John G., Pervez, Yasmeen Fatima, Deb, Manas Kanti, Shrivas, Kamlesh, Jain, Vikas Kumar, Khan, Noor A.]
通讯作者:
Khan, Noor A.
DOI:
10.1016/j.combustflame.2021.02.029
发表时间:
2021-07
期刊:
Combustion and Flame
影响因子:
4.4
作者:
[Phillip R. Johnson;R. Chakrabarty;B. Kumfer]
通讯作者:
Phillip R. Johnson;R. Chakrabarty;B. Kumfer
Correcting for filter-based aerosol light absorption biases at the Atmospheric Radiation Measurement program's Southern Great Plains site using photoacoustic measurements and machine learning
使用光声测量和机器学习纠正大气辐射测量计划南部大平原站点基于过滤器的气溶胶光吸收偏差
DOI:
10.5194/amt-15-4569-2022
发表时间:
2022
期刊:
Atmospheric Measurement Techniques
影响因子:
3.8
作者:
[Kumar, Joshin, Paik, Theo, Shetty, Nishit J., Sheridan, Patrick, Aiken, Allison C., Dubey, Manvendra K., Chakrabarty, Rajan K.]
通讯作者:
Chakrabarty, Rajan K.
DOI:
10.1038/s41598-019-48143-y
发表时间:
2019-08-14
期刊:
SCIENTIFIC REPORTS
影响因子:
4.6
作者:
[Bhandari, Janarjan, China, Swarup, Mazzoleni, Claudio]
通讯作者:
Mazzoleni, Claudio
DOI:
10.1016/j.jqsrt.2021.107759
发表时间:
2021-06
期刊:
Journal of Applied Meteorology and Climatology
影响因子:
3
作者:
[Chenchong Zhang;W. Heinson;M. Garay;O. Kalashnikova;R. Chakrabarty]
通讯作者:
Chenchong Zhang;W. Heinson;M. Garay;O. Kalashnikova;R. Chakrabarty
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UNS: GROWTH KINETICS AND MICROPHYSICAL PROPERTIES OF SOOT SUPERAGGREGATES
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批准号:1511964
-
项目类别:Standard Grant
-
资助金额:$29.91万
-
财政年份:2015
-
负责人:Rajan Chakrabarty
-
依托单位:
CAREER: From Cradle to Grave: Radiative Properties of Biomass Burning Aerosols
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批准号:1455215
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项目类别:Continuing Grant
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资助金额:$69.12万
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财政年份:2015
-
负责人:Rajan Chakrabarty
-
依托单位:
海外基金