Relationship between cloud condensation nuclei (CCN) concentration and aerosol optical depth in the Arctic region

Seo H. Ahn; Y. J. Yoon; T. J. Choi; J. Y. Lee; Y. P. Kim; B. Y. Lee; C. Ritter; W. Aas; R. Krejci; J. Ström; P. Tunved; Chang H. Jung

doi:10.1016/j.atmosenv.2021.118748

Relationship between cloud condensation nuclei (CCN) concentration and aerosol optical depth in the Arctic region

Seo H. Ahn, Y. J. Yoon, T. J. Choi, J. Y. Lee, Y. P. Kim, B. Y. Lee, C. Ritter, W. Aas, R. Krejci, J. Ström, P. Tunved, Chang H. Jung

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

To determine the direct and indirect effects of aerosols on climate, it is important to know the spatial and temporal variations in cloud condensation nuclei (CCN) concentrations. Although many types of CCN measurements are available, extensive CCN measurements are challenging because of the complexity and high operating cost, especially in remote areas. As aerosol optical depth (AOD) can be readily observed by remote sensing, many attempts have been made to estimate CCN concentrations from AOD. In this study, the CCN–AOD relationship is parameterized based on CCN ground measurements from the Zeppelin Observatory (78.91° N, 11.89° E, 474 m asl) in the Arctic region. The AOD measurements were obtained from the Ny-Ålesund site (78.923° N, 11.928° E) and Modern-Era Retrospective Analysis for Research and Applications, Version 2 reanalysis. Our results show a CCN–AOD correlation with a coefficient of determination R² of 0.59. Three additional estimation models for CCN were presented based on the following data: (i) in situ aerosol chemical composition, (ii) in situ aerosol optical properties, and (iii) chemical composition of AOD obtained from reanalysis data. The results from the model using in situ aerosol optical properties reproduced the observed CCN concentration most efficiently, suggesting that the contribution of BC to CCN concentration should be considered along with that of sulfate.

Original language	English
Article number	118748
Journal	Atmospheric Environment
Volume	267
DOIs	https://doi.org/10.1016/j.atmosenv.2021.118748
State	Published - 15 Dec 2021

Bibliographical note

Funding Information:
This research was supported by a National Research Foundation of Korea Grant from the Korean Government (MSIT) (NRF-2021M1A5A1065425/KOPRI-PN21011, and NRF-2021M1A5A1065672). The measurements of sulfate and sea salt in aerosols at Zeppelin Mountain were financed by the Norwegian Environment Agency. We would also like to thank the Swedish Environmental Protection Agency (Naturvårdsverket) for their long-term support of aerosol observations at the Zeppelin station. This work was also partly supported by the ACAS project funded by the Knut and Alice Wallenberg Foundation (KWA) and the funding agency FORMAS. The authors would also like to thank the Norwegian Polar Institute (NPI) for their long-lasting and substantial support of observations at the Zeppelin station used in this study.

Funding Information:
This research was supported by a National Research Foundation of Korea Grant from the Korean Government (MSIT) ( NRF-2021M1A5A1065425/KOPRI-PN21011 , and NRF-2021M1A5A1065672 ). The measurements of sulfate and sea salt in aerosols at Zeppelin Mountain were financed by the Norwegian Environment Agency . We would also like to thank the Swedish Environmental Protection Agency (Naturvårdsverket) for their long-term support of aerosol observations at the Zeppelin station. This work was also partly supported by the ACAS project funded by the Knut and Alice Wallenberg Foundation (KWA) and the funding agency FORMAS . The authors would also like to thank the Norwegian Polar Institute (NPI) for their long-lasting and substantial support of observations at the Zeppelin station used in this study.

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

Aerosol optical depth
Arctic region
Black carbon
CCN–AOD relationship
Cloud condensation nuclei

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10.1016/j.atmosenv.2021.118748

Cite this

@article{c38edc54662840d0841d90cbfc7acc55,

title = "Relationship between cloud condensation nuclei (CCN) concentration and aerosol optical depth in the Arctic region",

abstract = "To determine the direct and indirect effects of aerosols on climate, it is important to know the spatial and temporal variations in cloud condensation nuclei (CCN) concentrations. Although many types of CCN measurements are available, extensive CCN measurements are challenging because of the complexity and high operating cost, especially in remote areas. As aerosol optical depth (AOD) can be readily observed by remote sensing, many attempts have been made to estimate CCN concentrations from AOD. In this study, the CCN–AOD relationship is parameterized based on CCN ground measurements from the Zeppelin Observatory (78.91° N, 11.89° E, 474 m asl) in the Arctic region. The AOD measurements were obtained from the Ny-{\AA}lesund site (78.923° N, 11.928° E) and Modern-Era Retrospective Analysis for Research and Applications, Version 2 reanalysis. Our results show a CCN–AOD correlation with a coefficient of determination R2 of 0.59. Three additional estimation models for CCN were presented based on the following data: (i) in situ aerosol chemical composition, (ii) in situ aerosol optical properties, and (iii) chemical composition of AOD obtained from reanalysis data. The results from the model using in situ aerosol optical properties reproduced the observed CCN concentration most efficiently, suggesting that the contribution of BC to CCN concentration should be considered along with that of sulfate.",

keywords = "Aerosol optical depth, Arctic region, Black carbon, CCN–AOD relationship, Cloud condensation nuclei",

author = "Ahn, {Seo H.} and Yoon, {Y. J.} and Choi, {T. J.} and Lee, {J. Y.} and Kim, {Y. P.} and Lee, {B. Y.} and C. Ritter and W. Aas and R. Krejci and J. Str{\"o}m and P. Tunved and Jung, {Chang H.}",

note = "Funding Information: This research was supported by a National Research Foundation of Korea Grant from the Korean Government (MSIT) (NRF-2021M1A5A1065425/KOPRI-PN21011, and NRF-2021M1A5A1065672). The measurements of sulfate and sea salt in aerosols at Zeppelin Mountain were financed by the Norwegian Environment Agency. We would also like to thank the Swedish Environmental Protection Agency (Naturv{\aa}rdsverket) for their long-term support of aerosol observations at the Zeppelin station. This work was also partly supported by the ACAS project funded by the Knut and Alice Wallenberg Foundation (KWA) and the funding agency FORMAS. The authors would also like to thank the Norwegian Polar Institute (NPI) for their long-lasting and substantial support of observations at the Zeppelin station used in this study. Funding Information: This research was supported by a National Research Foundation of Korea Grant from the Korean Government (MSIT) ( NRF-2021M1A5A1065425/KOPRI-PN21011 , and NRF-2021M1A5A1065672 ). The measurements of sulfate and sea salt in aerosols at Zeppelin Mountain were financed by the Norwegian Environment Agency . We would also like to thank the Swedish Environmental Protection Agency (Naturv{\aa}rdsverket) for their long-term support of aerosol observations at the Zeppelin station. This work was also partly supported by the ACAS project funded by the Knut and Alice Wallenberg Foundation (KWA) and the funding agency FORMAS . The authors would also like to thank the Norwegian Polar Institute (NPI) for their long-lasting and substantial support of observations at the Zeppelin station used in this study. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = dec,

day = "15",

doi = "10.1016/j.atmosenv.2021.118748",

language = "English",

volume = "267",

journal = "Atmospheric Environment",

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publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Relationship between cloud condensation nuclei (CCN) concentration and aerosol optical depth in the Arctic region

AU - Ahn, Seo H.

AU - Yoon, Y. J.

AU - Choi, T. J.

AU - Lee, J. Y.

AU - Kim, Y. P.

AU - Lee, B. Y.

AU - Ritter, C.

AU - Aas, W.

AU - Krejci, R.

AU - Ström, J.

AU - Tunved, P.

AU - Jung, Chang H.

N1 - Funding Information: This research was supported by a National Research Foundation of Korea Grant from the Korean Government (MSIT) (NRF-2021M1A5A1065425/KOPRI-PN21011, and NRF-2021M1A5A1065672). The measurements of sulfate and sea salt in aerosols at Zeppelin Mountain were financed by the Norwegian Environment Agency. We would also like to thank the Swedish Environmental Protection Agency (Naturvårdsverket) for their long-term support of aerosol observations at the Zeppelin station. This work was also partly supported by the ACAS project funded by the Knut and Alice Wallenberg Foundation (KWA) and the funding agency FORMAS. The authors would also like to thank the Norwegian Polar Institute (NPI) for their long-lasting and substantial support of observations at the Zeppelin station used in this study. Funding Information: This research was supported by a National Research Foundation of Korea Grant from the Korean Government (MSIT) ( NRF-2021M1A5A1065425/KOPRI-PN21011 , and NRF-2021M1A5A1065672 ). The measurements of sulfate and sea salt in aerosols at Zeppelin Mountain were financed by the Norwegian Environment Agency . We would also like to thank the Swedish Environmental Protection Agency (Naturvårdsverket) for their long-term support of aerosol observations at the Zeppelin station. This work was also partly supported by the ACAS project funded by the Knut and Alice Wallenberg Foundation (KWA) and the funding agency FORMAS . The authors would also like to thank the Norwegian Polar Institute (NPI) for their long-lasting and substantial support of observations at the Zeppelin station used in this study. Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/12/15

Y1 - 2021/12/15

N2 - To determine the direct and indirect effects of aerosols on climate, it is important to know the spatial and temporal variations in cloud condensation nuclei (CCN) concentrations. Although many types of CCN measurements are available, extensive CCN measurements are challenging because of the complexity and high operating cost, especially in remote areas. As aerosol optical depth (AOD) can be readily observed by remote sensing, many attempts have been made to estimate CCN concentrations from AOD. In this study, the CCN–AOD relationship is parameterized based on CCN ground measurements from the Zeppelin Observatory (78.91° N, 11.89° E, 474 m asl) in the Arctic region. The AOD measurements were obtained from the Ny-Ålesund site (78.923° N, 11.928° E) and Modern-Era Retrospective Analysis for Research and Applications, Version 2 reanalysis. Our results show a CCN–AOD correlation with a coefficient of determination R2 of 0.59. Three additional estimation models for CCN were presented based on the following data: (i) in situ aerosol chemical composition, (ii) in situ aerosol optical properties, and (iii) chemical composition of AOD obtained from reanalysis data. The results from the model using in situ aerosol optical properties reproduced the observed CCN concentration most efficiently, suggesting that the contribution of BC to CCN concentration should be considered along with that of sulfate.

AB - To determine the direct and indirect effects of aerosols on climate, it is important to know the spatial and temporal variations in cloud condensation nuclei (CCN) concentrations. Although many types of CCN measurements are available, extensive CCN measurements are challenging because of the complexity and high operating cost, especially in remote areas. As aerosol optical depth (AOD) can be readily observed by remote sensing, many attempts have been made to estimate CCN concentrations from AOD. In this study, the CCN–AOD relationship is parameterized based on CCN ground measurements from the Zeppelin Observatory (78.91° N, 11.89° E, 474 m asl) in the Arctic region. The AOD measurements were obtained from the Ny-Ålesund site (78.923° N, 11.928° E) and Modern-Era Retrospective Analysis for Research and Applications, Version 2 reanalysis. Our results show a CCN–AOD correlation with a coefficient of determination R2 of 0.59. Three additional estimation models for CCN were presented based on the following data: (i) in situ aerosol chemical composition, (ii) in situ aerosol optical properties, and (iii) chemical composition of AOD obtained from reanalysis data. The results from the model using in situ aerosol optical properties reproduced the observed CCN concentration most efficiently, suggesting that the contribution of BC to CCN concentration should be considered along with that of sulfate.

KW - Aerosol optical depth

KW - Arctic region

KW - Black carbon

KW - CCN–AOD relationship

KW - Cloud condensation nuclei

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U2 - 10.1016/j.atmosenv.2021.118748

DO - 10.1016/j.atmosenv.2021.118748

M3 - Article

AN - SCOPUS:85116457831

SN - 1352-2310

VL - 267

JO - Atmospheric Environment

JF - Atmospheric Environment

M1 - 118748

ER -

Relationship between cloud condensation nuclei (CCN) concentration and aerosol optical depth in the Arctic region

Abstract

Bibliographical note

Keywords

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