Thu Apr 10, F. Flechtner
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Purdy, Adam J., David, Cé dric H., Sikder, Md. Safat, Reager, John T., Chandanpurkar, Hrishikesh A., Jones, Norman L., and Matin, Mir A., 2019. An Open-Source Tool to Facilitate the Processing of GRACE Observations and GLDAS Outputs: An Evaluation in Bangladesh. Frontiers in Environmental Science, 7:00155, doi:10.3389/fenvs.2019.00155.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2019FrEnS...700155P,
author = {{Purdy}, Adam J. and {David}, C{\'e} dric H. and {Sikder}, Md. Safat and {Reager}, John T. and {Chandanpurkar}, Hrishikesh A. and {Jones}, Norman L. and {Matin}, Mir A.},
title = "{An Open-Source Tool to Facilitate the Processing of GRACE Observations and GLDAS Outputs: An Evaluation in Bangladesh}",
journal = {Frontiers in Environmental Science},
keywords = {general environmental science},
year = 2019,
month = oct,
volume = {7},
pages = {00155},
abstract = "{The Plankton, Aerosol, Clouds, ocean Ecosystem (PACE) mission presents
new opportunities and new challenges in applying observations of
two complementary multi-angle polarimeters for the space-based
retrieval of global aerosol properties.Aerosol remote sensing
from multi-angle radiometric-only observations enables aerosol
characterization to a greater degree than single-view
radiometers, as demonstrated by nearly two decades of heritage
instruments. Adding polarimetry to the multi-angle observations
allows for the retrieval of aerosol optical depth, Angstrom
exponent,parameters of size distribution, measures of aerosol
absorption, complex refractive index and degree of non-
sphericity of the particles, as demonstrated by two independent
retrieval algorithms applied to the heritage POLarization and
Directionality of the Earth's Reflectance (POLDER) instrument.
The reason why this detailed particle characterization is
possible is because a multi-angle polarimeter measurement
contains twice the number of Degrees of Freedom of Signal (DFS)
compared to an observation from a single-view radiometer. The
challenges of making use of this information content involve
separating surface signal from atmospheric signal, especially
when the surface is optically complex and especially in the
ultraviolet portion of the spectrum where we show the necessity
of polarization in making that separation. The path forward is
likely to involve joint retrievalsthat will simultaneously
retrieve aerosol and surface properties, although advances will
berequired in radiative transfer modeling and in representing
optically complex constituents in those models. Another
challenge is in having the processing capability that can keep
pace with the output of these instruments in an operational
environment. Yet, preliminaryalgorithms applied to airborne
multi-angle polarimeter observations offer encouraging results
that demonstrate the advantages of these instruments to retrieve
aerosol layer height, particle single scattering albedo, size
distribution and spectral optical depth, and also show the
necessity of polarization measurements, not just multi-angle
radiometricmeasurements, to achieve these results.}",
doi = {10.3389/fenvs.2019.00155},
adsurl = {https://ui.adsabs.harvard.edu/abs/2019FrEnS...700155P},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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