Estimating Marine Aerosol Particle Volume and Number from Maritime Aerosol Network Data
As well as spectral aerosol optical depth (AOD), aerosol composition and concentration (number, volume, or mass) are of interest for a variety of applications. However, remote sensing of these quantities is more difficult than for AOD, as it is more sensitive to assumptions relating to aerosol compo...
Main Authors: | , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/2060/20120017003 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:20120017003 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:20120017003 2023-05-15T13:06:44+02:00 Estimating Marine Aerosol Particle Volume and Number from Maritime Aerosol Network Data Hsu, N. C. Sayer, A. M. Holben, B. N. Munchak, L. A. Smirnov, A. Unclassified, Unlimited, Publicly available May 21, 2012 application/pdf http://hdl.handle.net/2060/20120017003 unknown Document ID: 20120017003 http://hdl.handle.net/2060/20120017003 Copyright, Distribution as joint owner in the copyright CASI Earth Resources and Remote Sensing GSFC.JA.6599.2012 2012 ftnasantrs 2019-07-21T06:18:53Z As well as spectral aerosol optical depth (AOD), aerosol composition and concentration (number, volume, or mass) are of interest for a variety of applications. However, remote sensing of these quantities is more difficult than for AOD, as it is more sensitive to assumptions relating to aerosol composition. This study uses spectral AOD measured on Maritime Aerosol Network (MAN) cruises, with the additional constraint of a microphysical model for unpolluted maritime aerosol based on analysis of Aerosol Robotic Network (AERONET) inversions, to estimate these quantities over open ocean. When the MAN data are subset to those likely to be comprised of maritime aerosol, number and volume concentrations obtained are physically reasonable. Attempts to estimate surface concentration from columnar abundance, however, are shown to be limited by uncertainties in vertical distribution. Columnar AOD at 550 nm and aerosol number for unpolluted maritime cases are also compared with Moderate Resolution Imaging Spectroradiometer (MODIS) data, for both the present Collection 5.1 and forthcoming Collection 6. MODIS provides a best-fitting retrieval solution, as well as the average for several different solutions, with different aerosol microphysical models. The average solution MODIS dataset agrees more closely with MAN than the best solution dataset. Terra tends to retrieve lower aerosol number than MAN, and Aqua higher, linked with differences in the aerosol models commonly chosen. Collection 6 AOD is likely to agree more closely with MAN over open ocean than Collection 5.1. In situations where spectral AOD is measured accurately, and aerosol microphysical properties are reasonably well-constrained, estimates of aerosol number and volume using MAN or similar data would provide for a greater variety of potential comparisons with aerosol properties derived from satellite or chemistry transport model data. Other/Unknown Material Aerosol Robotic Network NASA Technical Reports Server (NTRS) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Earth Resources and Remote Sensing |
spellingShingle |
Earth Resources and Remote Sensing Hsu, N. C. Sayer, A. M. Holben, B. N. Munchak, L. A. Smirnov, A. Estimating Marine Aerosol Particle Volume and Number from Maritime Aerosol Network Data |
topic_facet |
Earth Resources and Remote Sensing |
description |
As well as spectral aerosol optical depth (AOD), aerosol composition and concentration (number, volume, or mass) are of interest for a variety of applications. However, remote sensing of these quantities is more difficult than for AOD, as it is more sensitive to assumptions relating to aerosol composition. This study uses spectral AOD measured on Maritime Aerosol Network (MAN) cruises, with the additional constraint of a microphysical model for unpolluted maritime aerosol based on analysis of Aerosol Robotic Network (AERONET) inversions, to estimate these quantities over open ocean. When the MAN data are subset to those likely to be comprised of maritime aerosol, number and volume concentrations obtained are physically reasonable. Attempts to estimate surface concentration from columnar abundance, however, are shown to be limited by uncertainties in vertical distribution. Columnar AOD at 550 nm and aerosol number for unpolluted maritime cases are also compared with Moderate Resolution Imaging Spectroradiometer (MODIS) data, for both the present Collection 5.1 and forthcoming Collection 6. MODIS provides a best-fitting retrieval solution, as well as the average for several different solutions, with different aerosol microphysical models. The average solution MODIS dataset agrees more closely with MAN than the best solution dataset. Terra tends to retrieve lower aerosol number than MAN, and Aqua higher, linked with differences in the aerosol models commonly chosen. Collection 6 AOD is likely to agree more closely with MAN over open ocean than Collection 5.1. In situations where spectral AOD is measured accurately, and aerosol microphysical properties are reasonably well-constrained, estimates of aerosol number and volume using MAN or similar data would provide for a greater variety of potential comparisons with aerosol properties derived from satellite or chemistry transport model data. |
format |
Other/Unknown Material |
author |
Hsu, N. C. Sayer, A. M. Holben, B. N. Munchak, L. A. Smirnov, A. |
author_facet |
Hsu, N. C. Sayer, A. M. Holben, B. N. Munchak, L. A. Smirnov, A. |
author_sort |
Hsu, N. C. |
title |
Estimating Marine Aerosol Particle Volume and Number from Maritime Aerosol Network Data |
title_short |
Estimating Marine Aerosol Particle Volume and Number from Maritime Aerosol Network Data |
title_full |
Estimating Marine Aerosol Particle Volume and Number from Maritime Aerosol Network Data |
title_fullStr |
Estimating Marine Aerosol Particle Volume and Number from Maritime Aerosol Network Data |
title_full_unstemmed |
Estimating Marine Aerosol Particle Volume and Number from Maritime Aerosol Network Data |
title_sort |
estimating marine aerosol particle volume and number from maritime aerosol network data |
publishDate |
2012 |
url |
http://hdl.handle.net/2060/20120017003 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
CASI |
op_relation |
Document ID: 20120017003 http://hdl.handle.net/2060/20120017003 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766018649320062976 |