Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network
The aerosol monitoring network of the NOAA Earth System Research Laboratory routinely provides data on the aerosol absorption and spectral scattering and backscattering coefficients. An algorithm is introduced that retrieves from the primary measurements the aerosol asymmetry parameter, the optical...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , |
Format: | Other Non-Article Part of Journal/Newspaper |
Language: | unknown |
Published: |
Wiley
2006
|
Subjects: | |
Online Access: | http://elib.dlr.de/45471/ http://www.agu.org/journals/jd/jd0621/2005JD006545/ |
id |
ftdlr:oai:elib.dlr.de:45471 |
---|---|
record_format |
openpolar |
spelling |
ftdlr:oai:elib.dlr.de:45471 2023-05-15T15:07:03+02:00 Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network Fiebig, Markus Ogren, John A. 2006-11-08 http://elib.dlr.de/45471/ http://www.agu.org/journals/jd/jd0621/2005JD006545/ unknown Wiley Fiebig, Markus und Ogren, John A. (2006) Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network. Journal of Geophysical Research, 111, D21204. Wiley. DOI:10.1029/2005JD006545 Atmosphärische Spurenstoffe Zeitschriftenbeitrag PeerReviewed 2006 ftdlr https://doi.org/10.1029/2005JD006545 2018-03-11T23:49:42Z The aerosol monitoring network of the NOAA Earth System Research Laboratory routinely provides data on the aerosol absorption and spectral scattering and backscattering coefficients. An algorithm is introduced that retrieves from the primary measurements the aerosol asymmetry parameter, the optical property needed in addition to those mentioned above to completely characterize aerosol with respect to its direct radiative effect on climate. The algorithm is tested on synthetic data and shown to retrieve the spectral aerosol asymmetry parameter for aerodynamic particle diameters D p,aer ‹ 1.0 μm with ∼0.8% systematic uncertainty and ∼1.1% systematic uncertainty for D p,aer ‹ 10.0 μm. The algorithm is applied to data from six ESRL stations representing aerosol in the dried state of continental, marine, arctic, and free tropospheric origin. The retrieved asymmetry parameters show a significant dependence on wavelength. Both wavelength dependence and absolute value of the asymmetry parameter depend on location or air mass type. The median values range from 0.57 for free tropospheric aerosol to 0.65 for marine aerosol at 550 nm wavelength and D p,aer ‹ 10.0 μm. It is shown that the accuracy of the asymmetry parameters retrieved with the algorithm is significantly larger than that of asymmetry parameters derived from backscatter fractions assuming a Henyey-Greenstein phase function. Other Non-Article Part of Journal/Newspaper Arctic German Aerospace Center: elib - DLR electronic library Arctic Journal of Geophysical Research 111 D21 |
institution |
Open Polar |
collection |
German Aerospace Center: elib - DLR electronic library |
op_collection_id |
ftdlr |
language |
unknown |
topic |
Atmosphärische Spurenstoffe |
spellingShingle |
Atmosphärische Spurenstoffe Fiebig, Markus Ogren, John A. Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network |
topic_facet |
Atmosphärische Spurenstoffe |
description |
The aerosol monitoring network of the NOAA Earth System Research Laboratory routinely provides data on the aerosol absorption and spectral scattering and backscattering coefficients. An algorithm is introduced that retrieves from the primary measurements the aerosol asymmetry parameter, the optical property needed in addition to those mentioned above to completely characterize aerosol with respect to its direct radiative effect on climate. The algorithm is tested on synthetic data and shown to retrieve the spectral aerosol asymmetry parameter for aerodynamic particle diameters D p,aer ‹ 1.0 μm with ∼0.8% systematic uncertainty and ∼1.1% systematic uncertainty for D p,aer ‹ 10.0 μm. The algorithm is applied to data from six ESRL stations representing aerosol in the dried state of continental, marine, arctic, and free tropospheric origin. The retrieved asymmetry parameters show a significant dependence on wavelength. Both wavelength dependence and absolute value of the asymmetry parameter depend on location or air mass type. The median values range from 0.57 for free tropospheric aerosol to 0.65 for marine aerosol at 550 nm wavelength and D p,aer ‹ 10.0 μm. It is shown that the accuracy of the asymmetry parameters retrieved with the algorithm is significantly larger than that of asymmetry parameters derived from backscatter fractions assuming a Henyey-Greenstein phase function. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Fiebig, Markus Ogren, John A. |
author_facet |
Fiebig, Markus Ogren, John A. |
author_sort |
Fiebig, Markus |
title |
Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network |
title_short |
Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network |
title_full |
Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network |
title_fullStr |
Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network |
title_full_unstemmed |
Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network |
title_sort |
retrieval and climatology of the aerosol asymmetry parameter in the noaa aerosol monitoring network |
publisher |
Wiley |
publishDate |
2006 |
url |
http://elib.dlr.de/45471/ http://www.agu.org/journals/jd/jd0621/2005JD006545/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Fiebig, Markus und Ogren, John A. (2006) Retrieval and climatology of the aerosol asymmetry parameter in the NOAA aerosol monitoring network. Journal of Geophysical Research, 111, D21204. Wiley. DOI:10.1029/2005JD006545 |
op_doi |
https://doi.org/10.1029/2005JD006545 |
container_title |
Journal of Geophysical Research |
container_volume |
111 |
container_issue |
D21 |
_version_ |
1766338625871544320 |