Mass absorption cross-section and absorption enhancement from
long term black and elemental carbon measurements: A rural
background station in Central Europe

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J 2021

Mass absorption cross-section and absorption enhancement from long term black and elemental carbon measurements: A rural background station in Central Europe

MBENGUE, Saliou; Nadezda ZIKOVA; Jaroslav SCHWARZ; Petr VODICKA; Adela SMEJKALOVA HOLUBOVA et. al.

Basic information

Original name

Mass absorption cross-section and absorption enhancement from long term black and elemental carbon measurements: A rural background station in Central Europe

Authors

MBENGUE, Saliou (203 Czech Republic); Nadezda ZIKOVA (203 Czech Republic); Jaroslav SCHWARZ (203 Czech Republic); Petr VODICKA (203 Czech Republic); Adela SMEJKALOVA HOLUBOVA (203 Czech Republic) and Ivan HOLOUBEK (203 Czech Republic, guarantor, belonging to the institution)

Edition

Science of the Total Environment, Amsterdam, Elsevier Science, 2021, 0048-9697

Other information

Language

English

Type of outcome

Article in a journal

Country of publisher

Netherlands

Confidentiality degree

is not subject to a state or trade secret

References:

URL

RIV identification code

RIV/00216224:14310/21:00122907

Organization

Přírodovědecká fakulta – Repository – Repository

DOI

http://dx.doi.org/10.1016/j.scitotenv.2021.148365

UT WoS

000691673500006

EID Scopus

2-s2.0-85108853021

Keywords in English

Aerosol light absorption; Black carbon; Elemental carbon; Brown carbon; MAC; Absorption enhancement

Links

CZ.02.1.01/0.0/0.0/16_013/0001315, interní kód Repo. EF18_046/0015968, research and development project. ACTRIS -CZ, large research infrastructures. ACTRIS-CZ II, large research infrastructures.

Changed: 5/6/2025 00:50, RNDr. Daniel Jakubík

Abstract

V originále

Black carbon (BC) is a dominant aerosol light absorber, and its brown carbon (BrC) coating can enhance absorption and lead to uncertainties concerning the radiative forcing estimation. This study investigates the mass absorption cross-section of equivalent BC (MAC(eBC)) during a long-term field measurement (2013-2017) at a rural Central European site. The MAC enhancement factor (E-abs) and the contribution of BrC coatings to the absorption coefficient (B-abs) were estimated by combining different approaches. The annual mean B-abs and MAC(eBC) values decreased slightly over the measurement period associated with change in the submicron aerosol size distribution. Regardless of the wavelength, B-abs exhibited clear seasonal and diurnal variations, with higher values in winter when a higher absorption Angstromexponent (1.4) was observed due to the local biomass burning (BB). In contrast, MACeBC did not have a distinct temporal trend at 600 nm (7.84 +/- 2.79 m(2) g(-1)), while it showed a seasonal trend at 370 nm with higher values in winter (15.64 +/- 4.77 m(2) g(-1)). During this season, E-abs_(660) was 1.18 +/- 0.27 and did not exhibit any clear wavelength dependence, despite the influence of BB. During the study period, BrC-attributed absorption was observed in 31% of the samples, with a contribution of up to 40% of total Babs. In summer, the E-abs_(660) increased to 1.59 +/- 0.60, when a larger BC coating could be formed by secondary aerosol fractions. During this season, MAC(eBC)_ (660) and E-abs_(660) showed comparable source profiles that were mainly associated with aged air masses over central Europe, thereby supporting the fact that characteristics of coating materials formed during atmospheric aging are a major factor driving the MAC(eBC)_(660) measured at the regional background site. Further field investigations of the composition of BC coatings would help to better understand and estimate uncertainties related to the radiative effect of aerosols.

Files attached

https://is.muni.cz/publication/1804697/1804697.pdf

Cite

MBENGUE, Saliou; Nadezda ZIKOVA; Jaroslav SCHWARZ; Petr VODICKA; Adela SMEJKALOVA HOLUBOVA and Ivan HOLOUBEK. Mass absorption cross-section and absorption enhancement from long term black and elemental carbon measurements: A rural background station in Central Europe. Science of the Total Environment. Amsterdam: Elsevier Science, 2021, vol. 794, November 2021, p. 1-14. ISSN 0048-9697. Available from: https://dx.doi.org/10.1016/j.scitotenv.2021.148365.

@article{46534,
   author = {Mbengue, Saliou and Zikova, Nadezda and Schwarz, Jaroslav and Vodicka, Petr and Smejkalova Holubova, Adela and Holoubek, Ivan},
   article_location = {Amsterdam},
   article_number = {November 2021},
   doi = {http://dx.doi.org/10.1016/j.scitotenv.2021.148365},
   keywords = {Aerosol light absorption; Black carbon; Elemental carbon; Brown carbon; MAC; Absorption enhancement},
   language = {eng},
   issn = {0048-9697},
   journal = {Science of the Total Environment},
   title = {Mass absorption cross-section and absorption enhancement from long term black and elemental carbon measurements: A rural background station in Central Europe},
   url = {https://www.sciencedirect.com/science/article/pii/S0048969721034367?via%3Dihub},
   volume = {794},
   year = {2021}
}

TY  - JOUR
ID  - 46534
AU  - Mbengue, Saliou - Zikova, Nadezda - Schwarz, Jaroslav - Vodicka, Petr - Smejkalova Holubova, Adela - Holoubek, Ivan
PY  - 2021
TI  - Mass absorption cross-section and absorption enhancement from long term black and elemental carbon measurements: A rural background station in Central Europe
JF  - Science of the Total Environment
VL  - 794
IS  - November 2021
SP  - 1-14
EP  - 1-14
PB  - Elsevier Science
SN  - 0048-9697
KW  - Aerosol light absorption
KW  - Black carbon
KW  - Elemental carbon
KW  - Brown carbon
KW  - MAC
KW  - Absorption enhancement
UR  - https://www.sciencedirect.com/science/article/pii/S0048969721034367?via%3Dihub
N2  - Black carbon (BC) is a dominant aerosol light absorber, and its brown carbon (BrC) coating can enhance absorption and lead to uncertainties concerning the radiative forcing estimation. This study investigates the mass absorption cross-section of equivalent BC (MAC(eBC)) during a long-term field measurement (2013-2017) at a rural Central European site. The MAC enhancement factor (E-abs) and the contribution of BrC coatings to the absorption coefficient (B-abs) were estimated by combining different approaches. The annual mean B-abs and MAC(eBC) values decreased slightly over the measurement period associated with change in the submicron aerosol size distribution. Regardless of the wavelength, B-abs exhibited clear seasonal and diurnal variations, with higher values in winter when a higher absorption Angstromexponent (1.4) was observed due to the local biomass burning (BB). In contrast, MACeBC did not have a distinct temporal trend at 600 nm (7.84 +/- 2.79 m(2) g(-1)), while it showed a seasonal trend at 370 nm with higher values in winter (15.64 +/- 4.77 m(2) g(-1)). During this season, E-abs_(660) was 1.18 +/- 0.27 and did not exhibit any clear wavelength dependence, despite the influence of BB. During the study period, BrC-attributed absorption was observed in 31% of the samples, with a contribution of up to 40% of total Babs. In summer, the E-abs_(660) increased to 1.59 +/- 0.60, when a larger BC coating could be formed by secondary aerosol fractions. During this season, MAC(eBC)_ (660) and E-abs_(660) showed comparable source profiles that were mainly associated with aged air masses over central Europe, thereby supporting the fact that characteristics of coating materials formed during atmospheric aging are a major factor driving the MAC(eBC)_(660) measured at the regional background site. Further field investigations of the composition of BC coatings would help to better understand and estimate uncertainties related to the radiative effect of aerosols.
ER  -

MBENGUE, Saliou; Nadezda ZIKOVA; Jaroslav SCHWARZ; Petr VODICKA; Adela SMEJKALOVA HOLUBOVA and Ivan HOLOUBEK. Mass absorption cross-section and absorption enhancement from long term black and elemental carbon measurements: A rural background station in Central Europe. \textit{Science of the Total Environment}. Amsterdam: Elsevier Science, 2021, vol.~794, November 2021, p.~1-14. ISSN~0048-9697. Available from: https://dx.doi.org/10.1016/j.scitotenv.2021.148365.