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Overview of the first SMOS sea surface salinity products. Part 1: quality assessment for the second half of 2010 / N. Reul in IEEE Transactions on geoscience and remote sensing, vol 50 n° 5 Tome 1 (May 2012)
[article]
Titre : Overview of the first SMOS sea surface salinity products. Part 1: quality assessment for the second half of 2010 Type de document : Article/Communication Auteurs : N. Reul, Auteur ; J. Tenerelli, Auteur ; J. Boutin, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 1636 - 1647 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] eau de mer
[Termes IGN] image SMOS
[Termes IGN] qualité des données
[Termes IGN] salinité
[Termes IGN] température de luminanceRésumé : (Auteur) Multi-angular images of the brightness temperature (TB) of the Earth at 1.4 GHz are reconstructed from the Soil Moisture and Ocean Salinity (SMOS) satellite sensor data since end 2009. Sea surface salinity (SSS) products remote sensing from space is being attempted using these data over the world oceans. The quality of the first version of the European Space Agency operational Level 2 (L2) SSS swath products is assessed in this paper, using satellite/in situ SSS data match-ups that were collected over the second half of 2010. This database reveals that 95% of the SMOS L2 products show a global error standard deviation on the order of ~ 1.3 practical salinity scale. Simple spatiotemporal aggregation of the L2 products to generate monthly SSS maps at 1° x 1° spatial resolution reduces the error down to about 0.6 globally and 0.4 in the tropics for 90% of the data. Several major problems are, however, detected in the products. Systematically, SMOS SSS data are biased within a ~ 1500 km wide belt along the world coasts and sea ice edges, with a contamination intensity and spread varying from ascending to descending passes. Numerous world ocean areas are permanently or intermittently contaminated by radio-frequency interferences, particularly in the northern high latitudes and following Asia coastlines. Moreover, temporal drifts in the retrieved SSS fields are found with varying signatures in ascending and descending passes. In descending passes, a time-dependent strong latitudinal bias is found, with maximum amplitude reached at the end of the year. Errors in the forward modeling of the wind-induced emissivity and of the sea surface scattered galactic sources are as well identified, biasing the SSS retrievals at high and low winds and when the galactic equator sources are reflected toward the sensor. Numéro de notice : A2012-210 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2012.2188408 Date de publication en ligne : 23/03/2012 En ligne : https://doi.org/10.1109/TGRS.2012.2188408 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31657
in IEEE Transactions on geoscience and remote sensing > vol 50 n° 5 Tome 1 (May 2012) . - pp 1636 - 1647[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2012051A RAB Revue Centre de documentation En réserve L003 Disponible Validation of the SMOS L2 soil moisture data in the REMEDHUS network (Spain) / N. Sanchez in IEEE Transactions on geoscience and remote sensing, vol 50 n° 5 Tome 1 (May 2012)
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Titre : Validation of the SMOS L2 soil moisture data in the REMEDHUS network (Spain) Type de document : Article/Communication Auteurs : N. Sanchez, Auteur ; J. Martinez-Fernandez, Auteur ; A. Scaini, Auteur ; C. Perez-Gutierrez, Auteur Année de publication : 2012 Article en page(s) : pp 1602 - 1611 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] analyse comparative
[Termes IGN] Espagne
[Termes IGN] humidité du sol
[Termes IGN] image SMOS
[Termes IGN] réseau de contrôle
[Termes IGN] salinité
[Termes IGN] validation des données
[Termes IGN] zone humideRésumé : (Auteur) The Level 2 soil moisture products from the Soil Moisture and Ocean Salinity (SMOS) mission have been re- leased. The data must be validated under different scenarios of biophysical and climatic conditions. For the current study, the data from January to December 2010 from 20 in situ soil moisture stations from the REMEDHUS soil moisture measurement station network (Spain) were used. A comparison analysis was carried out in terms of the soil moisture content, its spatial variability, and temporal stability. The results show an acceptable level of agreement (R = 0.73, RMSD = 0.069 m3 · m-3, and bias = 0.053 m3 · m-3) between the in situ and satellite data. A slight constant underestimation from the SMOS data set was detected. A centered (bias removed) root-mean-square difference was calculated to account for this persistent bias (RMSDc = 0.044 m3 · m-3). This result is close to the SMOS accuracy objective of 0.04 m3 · m-3. Two conclusions can be drawn: First, SMOS is close to meet the mission accuracy requirements in REMEDHUS, and second, SMOS is able to detect temporal anomalies and the temporal evolution of ground soil moisture, even though the soil moisture was slightly underestimated. Despite a noticeably reduced spatial variability among the SMOS grid cells, the remotely sensed soil moisture shows a spatial pattern of the soil moisture fields on the area scale, in agreement with the site-specific characteristics of REMEDHUS. No differences were found between the use of ascending and descending orbits. In addition, no differences were detected between the use of time-overpass values of in situ soil moisture and that of the daily average. Numéro de notice : A2012-209 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2011.2170177 Date de publication en ligne : 02/11/2011 En ligne : https://doi.org/10.1109/TGRS.2011.2170177 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31656
in IEEE Transactions on geoscience and remote sensing > vol 50 n° 5 Tome 1 (May 2012) . - pp 1602 - 1611[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2012051A RAB Revue Centre de documentation En réserve L003 Disponible Recul des formations forestières dans la zone humide du littoral de Grand-Bassam, Côte d’Ivoire / C. Hauhouot in Revue internationale de géomatique, vol 21 n° 3 (septembre - novembre 2011)
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Titre : Recul des formations forestières dans la zone humide du littoral de Grand-Bassam, Côte d’Ivoire Type de document : Article/Communication Auteurs : C. Hauhouot, Auteur ; P. Pottier, Auteur ; Y. Bamba, Auteur Année de publication : 2011 Article en page(s) : pp 327 - 339 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] Abidjan (Côte d'Ivoire)
[Termes IGN] agriculture
[Termes IGN] Côte d'Ivoire
[Termes IGN] déboisement
[Termes IGN] eau de mer
[Termes IGN] eau douce
[Termes IGN] littoral
[Termes IGN] marais
[Termes IGN] ressources naturelles
[Termes IGN] surface cultivée
[Termes IGN] utilisation du sol
[Termes IGN] zone humideRésumé : (Auteur) Le secteur côtier de Grand-Bassam est situé à 43 km à l’est d’Abidjan. Il constitue un ensemble complexe de plans d’eaux (eaux douces, eaux lagunaires, eaux de mer) et de terres (sables, marécages et plateaux) abritant des communautés locales, dont certaines sont vulnérables et d’autres menacées d’extinction. La vulnérabilité du milieu est exacerbée par l’action anthropique qui ici apparaît comme le principal moteur de la dynamique des paysages. Les formations forestières se dégradent et reculent. Les forêts marécageuses sont également affectées. Cette évolution se fait au profit de l’agriculture extensive, grande consommatrice de terre. L’exploitation incontrôlée des ressources naturelles fait peser une grande menace sur la biodiversité. Numéro de notice : A2011-396 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : 10.3166/rig.15.327-339 En ligne : https://doi.org/10.3166/rig.15.327-339 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31175
in Revue internationale de géomatique > vol 21 n° 3 (septembre - novembre 2011) . - pp 327 - 339[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 047-2011031 RAB Revue Centre de documentation En réserve L003 Disponible Télédétection et salinité. Cartographie de la salinité des sols de la plaine algérienne du Bas-Chéliff / A. Douaoui in Géomatique expert, n° 76 (01/09/2010)
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Titre : Télédétection et salinité. Cartographie de la salinité des sols de la plaine algérienne du Bas-Chéliff Type de document : Article/Communication Auteurs : A. Douaoui, Auteur ; Philippe Lépinard, Auteur Année de publication : 2010 Article en page(s) : pp 36 - 41 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Algérie
[Termes IGN] cartographie thématique
[Termes IGN] géostatistique
[Termes IGN] image Terra-ASTER
[Termes IGN] plaine
[Termes IGN] salinité
[Termes IGN] sol salinNuméro de notice : A2010-396 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30589
in Géomatique expert > n° 76 (01/09/2010) . - pp 36 - 41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 265-2010041 RAB Revue Centre de documentation En réserve L003 Disponible Understanding sea-level rise and variability / J.A. Church (2010)
Titre : Understanding sea-level rise and variability Type de document : Monographie Auteurs : J.A. Church, Éditeur scientifique ; Philip L. Woodworth, Éditeur scientifique ; T. Aarup, Éditeur scientifique ; et al., Auteur Editeur : Chichester : Wiley-Blackwell Année de publication : 2010 Importance : 428 p. Format : 19 x 25 cm ISBN/ISSN/EAN : 978-1-4443-3451-7 Langues : Anglais (eng) Descripteur : [Termes IGN] changement climatique
[Termes IGN] niveau de la mer
[Termes IGN] océanographie dynamique
[Termes IGN] repère de référence
[Termes IGN] salinité
[Termes IGN] série temporelle
[Termes IGN] surcharge océanique
[Termes IGN] variation séculaire
[Vedettes matières IGN] AltimétrieIndex. décimale : 30.52 Marégraphie et niveau moyen des mers Résumé : (Auteur) Sea-level rise is one of the most obvious manifestations of anthropogenic climate change, and it directly threatens coasts as a result of increased erosion, more frequent storm-surge flooding and loss of habitat. However, the wide range of uncertainty in projections of global and regional sea-level rise presented by the Intergovernmental Panel on Climate Change is a significant hindrance in agreeing to appropriate mitigation levels and in planning adaptation measures. A workshop in June 2006, organized under the auspices of the World Climate Research Programme (WCRP) to address this issue, led to publication of this book. Understanding Sea-Level Rise and Variability identifies the major impacts of sea-level rise, presents up-to-date assessments of past sea-level change, thoroughly explores all of the factors contributing to sea-level rise, and explores how sea-level extreme events might change. It identifies what is known in each area and what research and observations are required to reduce the uncertainties in our understanding of sea-level rise so that more reliable future projections can be made. A synthesis of findings provides a concise summary of sea-level rise and its impacts on society. The book is for everyone interested in sea-level rise and its impacts, including policy makers, research funders, scientists, students, coastal managers and engineers. Note de contenu : Foreword
1 Introduction
2 Impacts of and Responses to Sea-Level Rise
2.1 Introduction
2.2 Climate Change and Global/Relative Sea-Level Rise
2.3 Sea-Level Rise and Resulting Impacts
2.4 Framework and Methods for the Analysis of Sea-Level-Rise Impacts
2.5 Recent Impacts of Sea Level Rise
2.6 Future Impacts of Sea-Level Rise
2.7 Responding to Sea-Level Rise
2.8 Next Steps
2.9 Concluding Remarks Acknowledgments - References
3 A First-Order Assessment of the Impact of Long-Term Trends in Extreme Sea Levels on Offshore Structures and Coastal Refineries
3.1 Introduction
3.2 Design Considerations
3.3 Impact of Long-Term Trends in Extreme Sea Levels
3.4 Evaluating the Economic Impact57
3.5 Conclusions - References
4 Paleoenvironmental Records, Geophysical Modeling, and Reconstruction of Sea-Level Trends and Variability on Centennial and Longer Timescales
4.1 Introduction
4.2 Past Sea-Level Changes
4.3 Sea-Level Indicators
4.4 Geophysical Modeling of Variability in Relative Sea-Level History
4.5 Regional Case Studies
4.6 Discussion and Conclusions Acknowledgments References
5 Modern Sea-Level-Change Estimates
5.1 Introduction
5.2 Estimates from Proxy Sea-Level Records
5.3 Estimate of Global Sea-Level Change from Tide Gauges
5.4 Estimates of Global Sea-Level Change- from Satellite Altimetry
5.5 Recommendations - Acknowledgments - References
6 Ocean Temperature and Salinity Contributions to Global and Regional Sea-Level Change
6.1 Introduction
6.2 Direct Estimates of Steric Sea-Level Rise
6.5 Estimating Steric Sea-Level Change Using Ocean Syntheses
6.4 Inferring Steric Sea Level from Tine Variable Gravity and Sea Level
6.5 Modeling Steric Sea-Level Rise
6.6 Conclusions and Recommendations - Acknowledgments - References
7 Cryospheric Contributions to Sea Level Rise and Variability
7.1 Introduction
7.2 Mass-Balance Techniques
7.3 lce Sheet Mass Balance
7.4 Mass Balance of Glaciers and lee Gaps
7.5 Glacier, lce-Cap, and Ice Sheet Modeling
7.6 Summary and Recommendations - References
8 Terrestrial Water-Storage Contributions to Sea-Level Rise and Variability
8.1 Introduction
8.2 Analysis Tools
8.3 Climate-Driven Changes of Terrestrial Water Storage
8.4 Direct Anthropogenic Changes of Terrestrial Water Storage
8.3 Synthesis
8.6 Recommendations - References
9 Geodetic Observations and Global Reference Frame Contributions to Understanding Sea-Level Rise and Variability
9.1 Introduction
9.2 Global and Regional Reference Systems
9.3 Linking GPS to Tide Gauges and Title Gauge Benchmarks
9.4 Recommendations for Geodetic Observations - Acknowledgments - References
10 Surface Mass Loading on a Dynamic Earth: Complexity and Contamination in the Geodetic Analysis of Global Sea Level Trends
10.1 Introduction
10.2 Glacial Isostatic Adjustment
10.3 Sea Level, Sea Surface, and the Geoid
10.4 Rapid Melting and Sea-Level Fingerprints
10.5 Great Earthquakes
10.6 Final Remarks Acknowledgments - References
11 Past and Future Changes in Extreme Sea Levels and Waves
11.1 Introduction
11.2 Evidence for Changes in Extreme Sea Levels and Waves in the Recent Past
11.3 Mid-Latitude and Tropical Storms: Changes in the Atmospheric Drivers of Extreme Sea Level
11.4 Future Extreme Water Levels
11.5 Future Research Needs
11.6 Conclusions Acknowledgments - References
12 Observing Systems Needed to Address Sea-Level Rise and Variability
12.1 Introduction
12.2 Sustained, Systematic Observing Systems (Existing Capabilities)
12.3 Development of Improved Observing Systems (New Capabilities)
12.4 Summary - References
13 Sea Level Rise and Variability: Synthesis and Outlook for the Future
13.1 Historical Sea-Level Change
13.2 Why is Sea Level Rising?
13.3 The Regional Distribution of Sea-Level Rise
13.4 Projections of Sea-Level Rise for the 21st Century and Beyond
13.5 Changes in Extreme Events
13.6 Sea Level and Society - ReferencesNuméro de notice : 14185 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Recueil / ouvrage collectif Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=40507 Réservation
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