Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway
We present a new method for calculating backscatter ratios of the stratospheric sulfate aerosol (SSA) layer from daytime and nighttime lidar measurements. Using this new method we show a first year-round dataset of stratospheric aerosol backscatter ratios at high latitudes. The SSA layer is located...
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fttibhannoverren:oai:oa.tib.eu:123456789/5991 2024-09-15T18:25:49+00:00 Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway Langenbach, A. Baumgarten, G. Fiedler, J. Lübken, F.-J. Von Savigny, C. Zalach, J. 2019 application/pdf https://oa.tib.eu/renate/handle/123456789/5991 https://doi.org/10.34657/4620 eng eng Göttingen : Copernicus GmbH ISSN:1867-1381 DOI:https://doi.org/10.5194/amt-12-4065-2019 https://doi.org/10.34657/4620 https://oa.tib.eu/renate/handle/123456789/5991 CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ frei zugänglich ddc:550 aerosol backscatter correction data set lidar observatory stratosphere sulfate Norway status-type:publishedVersion doc-type:Article doc-type:Text 2019 fttibhannoverren https://doi.org/10.34657/462010.5194/amt-12-4065-2019 2024-06-26T23:32:42Z We present a new method for calculating backscatter ratios of the stratospheric sulfate aerosol (SSA) layer from daytime and nighttime lidar measurements. Using this new method we show a first year-round dataset of stratospheric aerosol backscatter ratios at high latitudes. The SSA layer is located at altitudes between the tropopause and about 30 km. It is of fundamental importance for the radiative balance of the atmosphere. We use a state-of-the-art Rayleigh-Mie-Raman lidar at the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR) station located in northern Norway (69N, 16E; 380ma.s.l.). For nighttime measurements the aerosol backscatter ratios are derived using elastic and inelastic backscatter of the emitted laser wavelengths 355, 532 and 1064nm . The setup of the lidar allows measurements with a resolution of about 5 min in time and 150 m in altitude to be performed in high quality, which enables the identification of multiple sub-layers in the stratospheric aerosol layer of less than 1 km vertical thickness. We introduce a method to extend the dataset throughout the summer when measurements need to be performed under permanent daytime conditions. For that purpose we approximate the backscatter ratios from color ratios of elastic scattering and apply a correction function. We calculate the correction function using the average backscatter ratio profile at 355nm from about 1700 h of nighttime measurements from the years 2000 to 2018. Using the new method we finally present a year-round dataset based on about 4100 h of measurements during the years 2014 to 2017. © Author(s) 2019. Article in Journal/Newspaper Northern Norway Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover) |
institution |
Open Polar |
collection |
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover) |
op_collection_id |
fttibhannoverren |
language |
English |
topic |
ddc:550 aerosol backscatter correction data set lidar observatory stratosphere sulfate Norway |
spellingShingle |
ddc:550 aerosol backscatter correction data set lidar observatory stratosphere sulfate Norway Langenbach, A. Baumgarten, G. Fiedler, J. Lübken, F.-J. Von Savigny, C. Zalach, J. Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway |
topic_facet |
ddc:550 aerosol backscatter correction data set lidar observatory stratosphere sulfate Norway |
description |
We present a new method for calculating backscatter ratios of the stratospheric sulfate aerosol (SSA) layer from daytime and nighttime lidar measurements. Using this new method we show a first year-round dataset of stratospheric aerosol backscatter ratios at high latitudes. The SSA layer is located at altitudes between the tropopause and about 30 km. It is of fundamental importance for the radiative balance of the atmosphere. We use a state-of-the-art Rayleigh-Mie-Raman lidar at the Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR) station located in northern Norway (69N, 16E; 380ma.s.l.). For nighttime measurements the aerosol backscatter ratios are derived using elastic and inelastic backscatter of the emitted laser wavelengths 355, 532 and 1064nm . The setup of the lidar allows measurements with a resolution of about 5 min in time and 150 m in altitude to be performed in high quality, which enables the identification of multiple sub-layers in the stratospheric aerosol layer of less than 1 km vertical thickness. We introduce a method to extend the dataset throughout the summer when measurements need to be performed under permanent daytime conditions. For that purpose we approximate the backscatter ratios from color ratios of elastic scattering and apply a correction function. We calculate the correction function using the average backscatter ratio profile at 355nm from about 1700 h of nighttime measurements from the years 2000 to 2018. Using the new method we finally present a year-round dataset based on about 4100 h of measurements during the years 2014 to 2017. © Author(s) 2019. |
format |
Article in Journal/Newspaper |
author |
Langenbach, A. Baumgarten, G. Fiedler, J. Lübken, F.-J. Von Savigny, C. Zalach, J. |
author_facet |
Langenbach, A. Baumgarten, G. Fiedler, J. Lübken, F.-J. Von Savigny, C. Zalach, J. |
author_sort |
Langenbach, A. |
title |
Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway |
title_short |
Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway |
title_full |
Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway |
title_fullStr |
Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway |
title_full_unstemmed |
Year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern Norway |
title_sort |
year-round stratospheric aerosol backscatter ratios calculated from lidar measurements above northern norway |
publisher |
Göttingen : Copernicus GmbH |
publishDate |
2019 |
url |
https://oa.tib.eu/renate/handle/123456789/5991 https://doi.org/10.34657/4620 |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_relation |
ISSN:1867-1381 DOI:https://doi.org/10.5194/amt-12-4065-2019 https://doi.org/10.34657/4620 https://oa.tib.eu/renate/handle/123456789/5991 |
op_rights |
CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ frei zugänglich |
op_doi |
https://doi.org/10.34657/462010.5194/amt-12-4065-2019 |
_version_ |
1810466295700783104 |