Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements
In situ measurements of aerosol microphysical, chemical, and optical properties were made during global-scale flights from 2016–2018 as part of the Atmospheric Tomography Mission (ATom). The NASA DC-8 aircraft flew from ∼ 84 ∘ N to ∼ 86 ∘ S latitude over the Pacific, Atlantic, Arctic, and Southern o...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2021
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-21-15023-2021 https://doaj.org/article/b30fdb8716f74ea1840853dee12c509c |
id |
ftdoajarticles:oai:doaj.org/article:b30fdb8716f74ea1840853dee12c509c |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:b30fdb8716f74ea1840853dee12c509c 2023-05-15T13:06:53+02:00 Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements C. A. Brock K. D. Froyd M. Dollner C. J. Williamson G. Schill D. M. Murphy N. J. Wagner A. Kupc J. L. Jimenez P. Campuzano-Jost B. A. Nault J. C. Schroder D. A. Day D. J. Price B. Weinzierl J. P. Schwarz J. M. Katich S. Wang L. Zeng R. Weber J. Dibb E. Scheuer G. S. Diskin J. P. DiGangi T. Bui J. M. Dean-Day C. R. Thompson J. Peischl T. B. Ryerson I. Bourgeois B. C. Daube R. Commane S. C. Wofsy 2021-10-01T00:00:00Z https://doi.org/10.5194/acp-21-15023-2021 https://doaj.org/article/b30fdb8716f74ea1840853dee12c509c EN eng Copernicus Publications https://acp.copernicus.org/articles/21/15023/2021/acp-21-15023-2021.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-21-15023-2021 1680-7316 1680-7324 https://doaj.org/article/b30fdb8716f74ea1840853dee12c509c Atmospheric Chemistry and Physics, Vol 21, Pp 15023-15063 (2021) Physics QC1-999 Chemistry QD1-999 article 2021 ftdoajarticles https://doi.org/10.5194/acp-21-15023-2021 2022-12-31T07:21:28Z In situ measurements of aerosol microphysical, chemical, and optical properties were made during global-scale flights from 2016–2018 as part of the Atmospheric Tomography Mission (ATom). The NASA DC-8 aircraft flew from ∼ 84 ∘ N to ∼ 86 ∘ S latitude over the Pacific, Atlantic, Arctic, and Southern oceans while profiling nearly continuously between altitudes of ∼ 160 m and ∼ 12 km. These global circuits were made once each season. Particle size distributions measured in the aircraft cabin at dry conditions and with an underwing probe at ambient conditions were combined with bulk and single-particle composition observations and measurements of water vapor, pressure, and temperature to estimate aerosol hygroscopicity and hygroscopic growth factors and calculate size distributions at ambient relative humidity. These reconstructed, composition-resolved ambient size distributions were used to estimate intensive and extensive aerosol properties, including single-scatter albedo, the asymmetry parameter, extinction, absorption, Ångström exponents, and aerosol optical depth (AOD) at several wavelengths, as well as cloud condensation nuclei (CCN) concentrations at fixed supersaturations and lognormal fits to four modes. Dry extinction and absorption were compared with direct in situ measurements, and AOD derived from the extinction profiles was compared with remotely sensed AOD measurements from the ground-based Aerosol Robotic Network (AERONET); this comparison showed no substantial bias. The purpose of this work is to describe the methodology by which ambient aerosol properties are estimated from the in situ measurements, provide statistical descriptions of the aerosol characteristics of different remote air mass types, examine the contributions to AOD from different aerosol types in different air masses, and provide an entry point to the ATom aerosol database. The contributions of different aerosol types (dust, sea salt, biomass burning, etc.) to AOD generally align with expectations based on location of the profiles ... Article in Journal/Newspaper Aerosol Robotic Network albedo Arctic Atlantic Arctic Atlantic-Arctic Directory of Open Access Journals: DOAJ Articles Arctic Pacific Atmospheric Chemistry and Physics 21 19 15023 15063 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 C. A. Brock K. D. Froyd M. Dollner C. J. Williamson G. Schill D. M. Murphy N. J. Wagner A. Kupc J. L. Jimenez P. Campuzano-Jost B. A. Nault J. C. Schroder D. A. Day D. J. Price B. Weinzierl J. P. Schwarz J. M. Katich S. Wang L. Zeng R. Weber J. Dibb E. Scheuer G. S. Diskin J. P. DiGangi T. Bui J. M. Dean-Day C. R. Thompson J. Peischl T. B. Ryerson I. Bourgeois B. C. Daube R. Commane S. C. Wofsy Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
In situ measurements of aerosol microphysical, chemical, and optical properties were made during global-scale flights from 2016–2018 as part of the Atmospheric Tomography Mission (ATom). The NASA DC-8 aircraft flew from ∼ 84 ∘ N to ∼ 86 ∘ S latitude over the Pacific, Atlantic, Arctic, and Southern oceans while profiling nearly continuously between altitudes of ∼ 160 m and ∼ 12 km. These global circuits were made once each season. Particle size distributions measured in the aircraft cabin at dry conditions and with an underwing probe at ambient conditions were combined with bulk and single-particle composition observations and measurements of water vapor, pressure, and temperature to estimate aerosol hygroscopicity and hygroscopic growth factors and calculate size distributions at ambient relative humidity. These reconstructed, composition-resolved ambient size distributions were used to estimate intensive and extensive aerosol properties, including single-scatter albedo, the asymmetry parameter, extinction, absorption, Ångström exponents, and aerosol optical depth (AOD) at several wavelengths, as well as cloud condensation nuclei (CCN) concentrations at fixed supersaturations and lognormal fits to four modes. Dry extinction and absorption were compared with direct in situ measurements, and AOD derived from the extinction profiles was compared with remotely sensed AOD measurements from the ground-based Aerosol Robotic Network (AERONET); this comparison showed no substantial bias. The purpose of this work is to describe the methodology by which ambient aerosol properties are estimated from the in situ measurements, provide statistical descriptions of the aerosol characteristics of different remote air mass types, examine the contributions to AOD from different aerosol types in different air masses, and provide an entry point to the ATom aerosol database. The contributions of different aerosol types (dust, sea salt, biomass burning, etc.) to AOD generally align with expectations based on location of the profiles ... |
format |
Article in Journal/Newspaper |
author |
C. A. Brock K. D. Froyd M. Dollner C. J. Williamson G. Schill D. M. Murphy N. J. Wagner A. Kupc J. L. Jimenez P. Campuzano-Jost B. A. Nault J. C. Schroder D. A. Day D. J. Price B. Weinzierl J. P. Schwarz J. M. Katich S. Wang L. Zeng R. Weber J. Dibb E. Scheuer G. S. Diskin J. P. DiGangi T. Bui J. M. Dean-Day C. R. Thompson J. Peischl T. B. Ryerson I. Bourgeois B. C. Daube R. Commane S. C. Wofsy |
author_facet |
C. A. Brock K. D. Froyd M. Dollner C. J. Williamson G. Schill D. M. Murphy N. J. Wagner A. Kupc J. L. Jimenez P. Campuzano-Jost B. A. Nault J. C. Schroder D. A. Day D. J. Price B. Weinzierl J. P. Schwarz J. M. Katich S. Wang L. Zeng R. Weber J. Dibb E. Scheuer G. S. Diskin J. P. DiGangi T. Bui J. M. Dean-Day C. R. Thompson J. Peischl T. B. Ryerson I. Bourgeois B. C. Daube R. Commane S. C. Wofsy |
author_sort |
C. A. Brock |
title |
Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements |
title_short |
Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements |
title_full |
Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements |
title_fullStr |
Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements |
title_full_unstemmed |
Ambient aerosol properties in the remote atmosphere from global-scale in situ measurements |
title_sort |
ambient aerosol properties in the remote atmosphere from global-scale in situ measurements |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/acp-21-15023-2021 https://doaj.org/article/b30fdb8716f74ea1840853dee12c509c |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Aerosol Robotic Network albedo Arctic Atlantic Arctic Atlantic-Arctic |
genre_facet |
Aerosol Robotic Network albedo Arctic Atlantic Arctic Atlantic-Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 21, Pp 15023-15063 (2021) |
op_relation |
https://acp.copernicus.org/articles/21/15023/2021/acp-21-15023-2021.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-21-15023-2021 1680-7316 1680-7324 https://doaj.org/article/b30fdb8716f74ea1840853dee12c509c |
op_doi |
https://doi.org/10.5194/acp-21-15023-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
19 |
container_start_page |
15023 |
op_container_end_page |
15063 |
_version_ |
1766025072754032640 |