AustralieFrV1, Main, Exploration, bibRecord, 005802

Toward understanding of differences in current cloud retrievals of ARM ground-based measurements

Identifieur interne : 005802 ( Main/Exploration ); précédent : 005801; suivant : 005803

Toward understanding of differences in current cloud retrievals of ARM ground-based measurements

Auteurs : CHUANFENG ZHAO [États-Unis] ; SHAOCHENG XIE [États-Unis] ; Stephen A. Klein [États-Unis] ; Alain Protat [France, Australie] ; Matthew D. Shupe [États-Unis] ; Sally A. Mcfarlane [États-Unis] ; Jennifer M. Comstock [États-Unis] ; Julien Delanoë [France] ; MIN DENG [États-Unis] ; Maureen Dunn [États-Unis] ; Robin J. Hogan [Royaume-Uni] ; DONG HUANG [États-Unis] ; Michael P. Jensen [États-Unis] ; Gerald G. Mace [États-Unis] ; Renata Mccoy [États-Unis] ; Ewan J. O'Connor [Royaume-Uni, Finlande] ; David D. Turner [États-Unis] ; ZHIEN WANG [États-Unis]

Source :

Journal of geophysical research [ 0148-0227 ] ; 2012.

RBID : Pascal:12-0378611

Descripteurs français

Pascal (Inist)
- Nuage glace, Mesure basée sol, Modèle climat, Bilan radiatif, Télédétection, Algorithme extraction, Incertitude, Nuage aqueux, Glace, Rayon effectif.
Wicri :
- topic : Télédétection, Glace.

English descriptors

KwdEn :
- Climate models, Effective radius, Ground based measurement, Ice cloud, Radiation balance, Retrieval algorithm, Water cloud, ice, remote sensing, uncertainties.

Abstract

[1] Accurate observations of cloud microphysical properties are needed for evaluating and improving the representation of cloud processes in climate models and better estimate of the Earth radiative budget. However, large differences are found in current cloud products retrieved from ground-based remote sensing measurements using various retrieval algorithms. Understanding the differences is an important step to address uncertainties in the cloud retrievals. In this study, an in-depth analysis of nine existing ground-based cloud retrievals using ARM remote sensing measurements is carried out. We place emphasis on boundary layer overcast clouds and high level ice clouds, which are the focus of many current retrieval development efforts due to their radiative importance and relatively simple structure. Large systematic discrepancies in cloud microphysical properties are found in these two types of clouds among the nine cloud retrieval products, particularly for the cloud liquid and ice particle effective radius. Note that the differences among some retrieval products are even larger than the prescribed uncertainties reported by the retrieval algorithm developers. It is shown that most of these large differences have their roots in the retrieval theoretical bases, assumptions, as well as input and constraint parameters. This study suggests the need to further validate current retrieval theories and assumptions and even the development of new retrieval algorithms with more observations under different cloud regimes.

Affiliations:

Australie, Finlande, France, Royaume-Uni, États-Unis
Californie, Colorado, Oklahoma, Utah, Washington (État), Wyoming, État de New York

Links toward previous steps (curation, corpus...)

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to stream PascalFrancis, to step Curation: 004F35
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Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Toward understanding of differences in current cloud retrievals of ARM ground-based measurements</title>
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<author><name sortKey="Jensen, Michael P" sort="Jensen, Michael P" uniqKey="Jensen M" first="Michael P." last="Jensen">Michael P. Jensen</name>
<affiliation wicri:level="2"><inist:fA14 i1="08"><s1>Brookhaven National Laboratory</s1>
<s2>Upton, New York</s2>
<s3>USA</s3>
<sZ>10 aut.</sZ>
<sZ>12 aut.</sZ>
<sZ>13 aut.</sZ>
</inist:fA14>
<country>États-Unis</country>
<placeName><region type="state">État de New York</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Mace, Gerald G" sort="Mace, Gerald G" uniqKey="Mace G" first="Gerald G." last="Mace">Gerald G. Mace</name>
<affiliation wicri:level="2"><inist:fA14 i1="10"><s1>Department of Atmospheric Sciences, University of Utah</s1>
<s2>Salt Lake City, Utah</s2>
<s3>USA</s3>
<sZ>14 aut.</sZ>
</inist:fA14>
<country>États-Unis</country>
<placeName><region type="state">Utah</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Mccoy, Renata" sort="Mccoy, Renata" uniqKey="Mccoy R" first="Renata" last="Mccoy">Renata Mccoy</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Lawrence Livermore National Laboratory</s1>
<s2>Livermore, California</s2>
<s3>USA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>15 aut.</sZ>
</inist:fA14>
<country>États-Unis</country>
<placeName><region type="state">Californie</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="O Connor, Ewan J" sort="O Connor, Ewan J" uniqKey="O Connor E" first="Ewan J." last="O'Connor">Ewan J. O'Connor</name>
<affiliation wicri:level="1"><inist:fA14 i1="09"><s1>Department of Meteorology, University of Reading</s1>
<s2>Reading</s2>
<s3>GBR</s3>
<sZ>11 aut.</sZ>
<sZ>16 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Reading</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Finnish Meteorological Institute</s1>
<s2>Helsinki</s2>
<s3>FIN</s3>
<sZ>16 aut.</sZ>
</inist:fA14>
<country>Finlande</country>
<wicri:noRegion>Finnish Meteorological Institute</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Turner, David D" sort="Turner, David D" uniqKey="Turner D" first="David D." last="Turner">David D. Turner</name>
<affiliation wicri:level="2"><inist:fA14 i1="12"><s1>National Severe Storms Laboratory, NOAA</s1>
<s2>Norman, Oklahoma</s2>
<s3>USA</s3>
<sZ>17 aut.</sZ>
</inist:fA14>
<country>États-Unis</country>
<placeName><region type="state">Oklahoma</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Zhien Wang" sort="Zhien Wang" uniqKey="Zhien Wang" last="Zhien Wang">ZHIEN WANG</name>
<affiliation wicri:level="2"><inist:fA14 i1="07"><s1>University of Wyoming</s1>
<s2>Laramie, Wyoming</s2>
<s3>USA</s3>
<sZ>9 aut.</sZ>
<sZ>18 aut.</sZ>
</inist:fA14>
<country>États-Unis</country>
<placeName><region type="state">Wyoming</region>
</placeName>
</affiliation>
</author>
</analytic>
<series><title level="j" type="main">Journal of geophysical research</title>
<title level="j" type="abbreviated">J. geophys. res.</title>
<idno type="ISSN">0148-0227</idno>
<imprint><date when="2012">2012</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">Journal of geophysical research</title>
<title level="j" type="abbreviated">J. geophys. res.</title>
<idno type="ISSN">0148-0227</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Climate models</term>
<term>Effective radius</term>
<term>Ground based measurement</term>
<term>Ice cloud</term>
<term>Radiation balance</term>
<term>Retrieval algorithm</term>
<term>Water cloud</term>
<term>ice</term>
<term>remote sensing</term>
<term>uncertainties</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Nuage glace</term>
<term>Mesure basée sol</term>
<term>Modèle climat</term>
<term>Bilan radiatif</term>
<term>Télédétection</term>
<term>Algorithme extraction</term>
<term>Incertitude</term>
<term>Nuage aqueux</term>
<term>Glace</term>
<term>Rayon effectif</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Télédétection</term>
<term>Glace</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">[1] Accurate observations of cloud microphysical properties are needed for evaluating and improving the representation of cloud processes in climate models and better estimate of the Earth radiative budget. However, large differences are found in current cloud products retrieved from ground-based remote sensing measurements using various retrieval algorithms. Understanding the differences is an important step to address uncertainties in the cloud retrievals. In this study, an in-depth analysis of nine existing ground-based cloud retrievals using ARM remote sensing measurements is carried out. We place emphasis on boundary layer overcast clouds and high level ice clouds, which are the focus of many current retrieval development efforts due to their radiative importance and relatively simple structure. Large systematic discrepancies in cloud microphysical properties are found in these two types of clouds among the nine cloud retrieval products, particularly for the cloud liquid and ice particle effective radius. Note that the differences among some retrieval products are even larger than the prescribed uncertainties reported by the retrieval algorithm developers. It is shown that most of these large differences have their roots in the retrieval theoretical bases, assumptions, as well as input and constraint parameters. This study suggests the need to further validate current retrieval theories and assumptions and even the development of new retrieval algorithms with more observations under different cloud regimes.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
<li>Finlande</li>
<li>France</li>
<li>Royaume-Uni</li>
<li>États-Unis</li>
</country>
<region><li>Californie</li>
<li>Colorado</li>
<li>Oklahoma</li>
<li>Utah</li>
<li>Washington (État)</li>
<li>Wyoming</li>
<li>État de New York</li>
</region>
</list>
<tree><country name="États-Unis"><region name="Californie"><name sortKey="Chuanfeng Zhao" sort="Chuanfeng Zhao" uniqKey="Chuanfeng Zhao" last="Chuanfeng Zhao">CHUANFENG ZHAO</name>
</region>
<name sortKey="Comstock, Jennifer M" sort="Comstock, Jennifer M" uniqKey="Comstock J" first="Jennifer M." last="Comstock">Jennifer M. Comstock</name>
<name sortKey="Dong Huang" sort="Dong Huang" uniqKey="Dong Huang" last="Dong Huang">DONG HUANG</name>
<name sortKey="Dunn, Maureen" sort="Dunn, Maureen" uniqKey="Dunn M" first="Maureen" last="Dunn">Maureen Dunn</name>
<name sortKey="Jensen, Michael P" sort="Jensen, Michael P" uniqKey="Jensen M" first="Michael P." last="Jensen">Michael P. Jensen</name>
<name sortKey="Klein, Stephen A" sort="Klein, Stephen A" uniqKey="Klein S" first="Stephen A." last="Klein">Stephen A. Klein</name>
<name sortKey="Mace, Gerald G" sort="Mace, Gerald G" uniqKey="Mace G" first="Gerald G." last="Mace">Gerald G. Mace</name>
<name sortKey="Mccoy, Renata" sort="Mccoy, Renata" uniqKey="Mccoy R" first="Renata" last="Mccoy">Renata Mccoy</name>
<name sortKey="Mcfarlane, Sally A" sort="Mcfarlane, Sally A" uniqKey="Mcfarlane S" first="Sally A." last="Mcfarlane">Sally A. Mcfarlane</name>
<name sortKey="Min Deng" sort="Min Deng" uniqKey="Min Deng" last="Min Deng">MIN DENG</name>
<name sortKey="Shaocheng Xie" sort="Shaocheng Xie" uniqKey="Shaocheng Xie" last="Shaocheng Xie">SHAOCHENG XIE</name>
<name sortKey="Shupe, Matthew D" sort="Shupe, Matthew D" uniqKey="Shupe M" first="Matthew D." last="Shupe">Matthew D. Shupe</name>
<name sortKey="Shupe, Matthew D" sort="Shupe, Matthew D" uniqKey="Shupe M" first="Matthew D." last="Shupe">Matthew D. Shupe</name>
<name sortKey="Turner, David D" sort="Turner, David D" uniqKey="Turner D" first="David D." last="Turner">David D. Turner</name>
<name sortKey="Zhien Wang" sort="Zhien Wang" uniqKey="Zhien Wang" last="Zhien Wang">ZHIEN WANG</name>
</country>
<country name="France"><noRegion><name sortKey="Protat, Alain" sort="Protat, Alain" uniqKey="Protat A" first="Alain" last="Protat">Alain Protat</name>
</noRegion>
<name sortKey="Delanoe, Julien" sort="Delanoe, Julien" uniqKey="Delanoe J" first="Julien" last="Delanoë">Julien Delanoë</name>
</country>
<country name="Australie"><noRegion><name sortKey="Protat, Alain" sort="Protat, Alain" uniqKey="Protat A" first="Alain" last="Protat">Alain Protat</name>
</noRegion>
</country>
<country name="Royaume-Uni"><noRegion><name sortKey="Hogan, Robin J" sort="Hogan, Robin J" uniqKey="Hogan R" first="Robin J." last="Hogan">Robin J. Hogan</name>
</noRegion>
<name sortKey="O Connor, Ewan J" sort="O Connor, Ewan J" uniqKey="O Connor E" first="Ewan J." last="O'Connor">Ewan J. O'Connor</name>
</country>
<country name="Finlande"><noRegion><name sortKey="O Connor, Ewan J" sort="O Connor, Ewan J" uniqKey="O Connor E" first="Ewan J." last="O'Connor">Ewan J. O'Connor</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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Toward understanding of differences in current cloud retrievals of ARM ground-based measurements

Toward understanding of differences in current cloud retrievals of ARM ground-based measurements

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