Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica
We measured optical properties and ionic composition of the aerosol at Neumayer Station from 2004 through 2006 by an integrating nephelometer and chemical analysis of daily aerosol samples, respectively. From this unique data set we discuss the seasonality of aerosol optical parameters along with th...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.695432 2023-05-15T13:42:09+02:00 Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica Weller, Rolf Lampert, Astrid LATITUDE: -70.650000 * LONGITUDE: -8.250000 * DATE/TIME START: 2004-01-01T10:00:00 * DATE/TIME END: 2007-01-31T10:00:00 2008-06-09 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.695432 https://doi.org/10.1594/PANGAEA.695432 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.695432 https://doi.org/10.1594/PANGAEA.695432 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Weller, Rolf; Lampert, Astrid (2008): Optical properties and sulfate scattering efficiency of boundary layer aerosol at coastal Neumayer Station, Antarctica. Journal of Geophysical Research: Atmospheres, 113, D16208, https://doi.org/10.1029/2008JD009962 Air chemistry observatory Atmospheric Chemistry @ AWI AWI_AC AWI_stations AWI Antarctic Land Expedition Dronning Maud Land Antarctica Neumayer_SPUSO SPUSO Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.695432 https://doi.org/10.1029/2008JD009962 2023-01-20T07:31:11Z We measured optical properties and ionic composition of the aerosol at Neumayer Station from 2004 through 2006 by an integrating nephelometer and chemical analysis of daily aerosol samples, respectively. From this unique data set we discuss the seasonality of aerosol optical parameters along with their chemical composition. Austral summer (November through March) was characterized by mean particle number concentrations of 472±260 cm**-3 compared to 168±160 cm**-3 during winter (April through October), mean scattering Ångström exponents of 1.7±0.6 compared to 1.3±0.6 during winter, and mean backscattering ratios at 700 nm of 0.21±0.13 compared to 0.17±0.08 during winter. In contrast, light scattering coefficients (ssp) showed a broad maximum during winter (4.8±5.3 1/µm for ssp(550)). The mean single scattering albedo was 0.99± at 550 nm. We further derived mass scattering and mass backscattering efficiencies for biogenic sulfate aerosol (BSA) at 450 nm, 550 nm, and 700 nm for relative humidities between 5% and 11%. At 550 nm the scattering efficiency for biogenic sulfate aerosol sigma bsBSA(550) was 8.9±0.7 m**2/g with a corresponding backscattering efficiency sigma bsBSA(550) of 1.0±0.08 m**2/g. From the seasonality of the aerosol composition we inferred a dominant contribution of sulfate aerosol regarding radiative forcing in the lower troposphere from December through January at Neumayer, while the impact of sea salt aerosol prevailed for the rest of the year. Dataset Antarc* Antarctic Antarctica Antarctica Journal Dronning Maud Land PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Austral Dronning Maud Land Neumayer Neumayer Station ENVELOPE(-8.250000,-8.250000,-70.650000,-70.650000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Air chemistry observatory Atmospheric Chemistry @ AWI AWI_AC AWI_stations AWI Antarctic Land Expedition Dronning Maud Land Antarctica Neumayer_SPUSO SPUSO |
spellingShingle |
Air chemistry observatory Atmospheric Chemistry @ AWI AWI_AC AWI_stations AWI Antarctic Land Expedition Dronning Maud Land Antarctica Neumayer_SPUSO SPUSO Weller, Rolf Lampert, Astrid Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica |
topic_facet |
Air chemistry observatory Atmospheric Chemistry @ AWI AWI_AC AWI_stations AWI Antarctic Land Expedition Dronning Maud Land Antarctica Neumayer_SPUSO SPUSO |
description |
We measured optical properties and ionic composition of the aerosol at Neumayer Station from 2004 through 2006 by an integrating nephelometer and chemical analysis of daily aerosol samples, respectively. From this unique data set we discuss the seasonality of aerosol optical parameters along with their chemical composition. Austral summer (November through March) was characterized by mean particle number concentrations of 472±260 cm**-3 compared to 168±160 cm**-3 during winter (April through October), mean scattering Ångström exponents of 1.7±0.6 compared to 1.3±0.6 during winter, and mean backscattering ratios at 700 nm of 0.21±0.13 compared to 0.17±0.08 during winter. In contrast, light scattering coefficients (ssp) showed a broad maximum during winter (4.8±5.3 1/µm for ssp(550)). The mean single scattering albedo was 0.99± at 550 nm. We further derived mass scattering and mass backscattering efficiencies for biogenic sulfate aerosol (BSA) at 450 nm, 550 nm, and 700 nm for relative humidities between 5% and 11%. At 550 nm the scattering efficiency for biogenic sulfate aerosol sigma bsBSA(550) was 8.9±0.7 m**2/g with a corresponding backscattering efficiency sigma bsBSA(550) of 1.0±0.08 m**2/g. From the seasonality of the aerosol composition we inferred a dominant contribution of sulfate aerosol regarding radiative forcing in the lower troposphere from December through January at Neumayer, while the impact of sea salt aerosol prevailed for the rest of the year. |
format |
Dataset |
author |
Weller, Rolf Lampert, Astrid |
author_facet |
Weller, Rolf Lampert, Astrid |
author_sort |
Weller, Rolf |
title |
Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica |
title_short |
Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica |
title_full |
Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica |
title_fullStr |
Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica |
title_full_unstemmed |
Optical properties of tropospheric aerosol and sulfate scattering efficiency measured at Neumayer Station, Antarctica |
title_sort |
optical properties of tropospheric aerosol and sulfate scattering efficiency measured at neumayer station, antarctica |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.695432 https://doi.org/10.1594/PANGAEA.695432 |
op_coverage |
LATITUDE: -70.650000 * LONGITUDE: -8.250000 * DATE/TIME START: 2004-01-01T10:00:00 * DATE/TIME END: 2007-01-31T10:00:00 |
long_lat |
ENVELOPE(-8.250000,-8.250000,-70.650000,-70.650000) |
geographic |
Antarctic Austral Dronning Maud Land Neumayer Neumayer Station |
geographic_facet |
Antarctic Austral Dronning Maud Land Neumayer Neumayer Station |
genre |
Antarc* Antarctic Antarctica Antarctica Journal Dronning Maud Land |
genre_facet |
Antarc* Antarctic Antarctica Antarctica Journal Dronning Maud Land |
op_source |
Supplement to: Weller, Rolf; Lampert, Astrid (2008): Optical properties and sulfate scattering efficiency of boundary layer aerosol at coastal Neumayer Station, Antarctica. Journal of Geophysical Research: Atmospheres, 113, D16208, https://doi.org/10.1029/2008JD009962 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.695432 https://doi.org/10.1594/PANGAEA.695432 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.695432 https://doi.org/10.1029/2008JD009962 |
_version_ |
1766163344905994240 |