Filters








106 Hits in 7.2 sec

High-Frequency Variations in Pearl River Plume Observed by Soil Moisture Active Passive Sea Surface Salinity

Xiaomei Liao, Yan Du, Tianyu Wang, Shuibo Hu, Haigang Zhan, Huizeng Liu, Guofeng Wu
2020 Remote Sensing  
Using recently available Soil Moisture Active Passive (SMAP) sea surface salinity (SSS) data and high-resolution ocean color products, this study investigated summertime high-frequency variations in the  ...  The offshore transport of freshwater varies concurrently with southwesterly wind anomalies and is roughly in phase with the Madden–Julian Oscillation (MJO) index in phases 1–5, thus implying that the MJO  ...  Acknowledgments: We thank the Remote Sensing Systems for SMAP SSS data (http://apdrc.soest.hawaii.edu/ data/data.php), NASA's Goddard Space Flight Center for the ocean color and SST products (https://oceandata.sci  ... 
doi:10.3390/rs12030563 fatcat:wxdscghs55arndkfamwg6oa2aq

The Soil Moisture Active Passive (SMAP) Mission

Dara Entekhabi, Eni G. Njoku, Peggy E. O'Neill, Kent H. Kellogg, Wade T. Crow, Wendy N. Edelstein, Jared K. Entin, Shawn D. Goodman, Thomas J. Jackson, Joel Johnson, John Kimball, Jeffrey R. Piepmeier (+11 others)
2010 Proceedings of the IEEE  
In addition, the SMAP project will use these observations with advanced modeling and data assimilation to provide deeper root-zone soil moisture and estimates of land surface-atmosphere exchanges of water  ...  SMAP will make global measurements of the moisture present at Earth's land surface and will distinguish frozen from thawed land surfaces.  ...  Additional enabled science and applications could include climate prediction, sea ice, salinity, surface winds, human health, and defense applications.  ... 
doi:10.1109/jproc.2010.2043918 fatcat:robg6kw5ozffnfr5qivjbgvjom

On Extreme Winds at L-Band with the SMAP Synthetic Aperture Radar

Alexander G. Fore, Simon H. Yueh, Bryan W. Stiles, Wenqing Tang, Akiko K. Hayashi
2019 Remote Sensing  
In this letter, we discuss some observations of the Soil Moisture Active Passive (SMAP) mission's high-resolution synthetic aperture radar (SAR) for extreme winds and tropical cyclones.  ...  We introduce a cyclone wind speed retrieval algorithm and apply it to the limited SMAP SAR dataset of cyclones.  ...  L-Band Remote Sensing of Ocean Surface L-band active/passive remote sensing of the ocean has been proven to be a reliable means for retrieval of sea surface salinity, ocean wind speed, and ocean wind direction  ... 
doi:10.3390/rs11091093 fatcat:ccj7e22itnahno55jg6zshe2s4

Properties of The RFI Environment at 1400-1427 MHz as observed by the Soil Moisture Active/Passive Mission Microwave Radiometer

Alexandra Bringer, J. Johnson, Yan Soldo, David M Le Vine, Priscilla N Mohammed, Sidharth Misra, Paolo De Matthaeis, Jeffrey R. Piepmeier
2021 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
The Soil Moisture Active/Passive (SMAP) satellite microwave radiometer has been providing global measurements of L-band thermal emission from Earth since April 2015.  ...  This paper examines properties of the global RFI environment as observed by SMAP, including information on RFI source properties (obtained from analysis of SMAP multiple detector outputs) and the evolution  ...  INTRODUCTION Measurements of Earth's natural thermal emissions in the protected 1400-1427 MHz portion of the radio spectrum can be used to monitor soil moisture, ocean salinity, and other Earth surface  ... 
doi:10.1109/jstars.2021.3092996 fatcat:kmpclifqsvbpdfu5ypz6tpum3i

Evaluation of MERRA Land Surface Estimates in Preparation for the Soil Moisture Active Passive Mission

Yonghong Yi, John S. Kimball, Lucas A. Jones, Rolf H. Reichle, Kyle C. McDonald
2011 Journal of Climate  
The upcoming N A SA Soil Moisture Active Passive (SMAP) mission is expected to improve M ERRA-type reanalysis accuracy by providing accurate global mapping of freeze-thaw state and surface soil moisture  ...  with 2-3-day temporal fidelity and enhanced (< 9 km) spatial resolution.  ...  This work was supported with funding from the NASA Hydrology and Terrestrial Ecology programs and the SMAP mission.  ... 
doi:10.1175/2011jcli4034.1 fatcat:efnj4kmla5fbtebba25mo2ug4m

Aquarius Wind Speed Products: Algorithms and Validation

Alexander G. Fore, Simon H. Yueh, Wenqing Tang, Akiko K. Hayashi, Gary S. E. Lagerloef
2014 IEEE Transactions on Geoscience and Remote Sensing  
and radiometer channels to achieve a simultaneous ocean vector wind and sea surface salinity retrieval.  ...  This paper introduces and validates the Aquarius scatterometer-only wind speed algorithm and the combined active passive (CAP) wind speed products.  ...  ACKNOWLEDGMENT This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.  ... 
doi:10.1109/tgrs.2013.2267616 fatcat:gdxfssm2znevfj2lvluh6cz3fy

Assessing Coastal SMAP Surface Salinity Accuracy and Its Application to Monitoring Gulf of Maine Circulation Dynamics

Semyon Grodsky, Douglas Vandemark, Hui Feng
2018 Remote Sensing  
Although remotely sensed sea surface temperature (SST), ocean color, and sea level have become routine, much of the water exchange physics is reflected in salinity fields.  ...  However, local sea surface salinity (SSS) retrieval is challenging due to both cold SST limiting salinity sensor sensitivity and proximity to land.  ...  Acknowledgments: SMAP salinity is produced by Remote Sensing Systems and sponsored by the NASA OSST. NERACOOS and OOI projects are acknowledged for providing the buoy hydrographic data.  ... 
doi:10.3390/rs10081232 fatcat:yhe6rszrofbhdndnzqw2d7milm

Modulation of the Ganges-Brahmaputra River Plume by the Indian Ocean Dipole and Eddies Inferred From Satellite Observations

S. Fournier, J. Vialard, M. Lengaigne, T. Lee, M. M. Gierach, A. V. S. Chaitanya
2017 Journal of Geophysical Research - Oceans  
Sea surface salinity (SSS) from the Soil Moisture Active Passive (SMAP) satellite provides unprecedented views of this peculiar feature from intraseasonal to interannual timescales.  ...  The resulting low-salinity sea surface has strong implications for the regional climate and living marine resources.  ...  Acknowledgments The research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. It is in part supported by the  ... 
doi:10.1002/2017jc013333 fatcat:yqri7tncnraoja56kuerndwspq

SMAP Salinity Retrievals near the Sea-Ice Edge Using Multi-Channel AMSR2 Brightness Temperatures

Thomas Meissner, Andrew Manaster
2021 Remote Sensing  
Sea-ice contamination in the antenna field of view constitutes a large error source in retrieving sea-surface salinity (SSS) with the spaceborne Soil Moisture Active Passive (SMAP) L-band radiometer.  ...  We provide a case study that evaluates the performance of the proposed sea-ice flagging and correction algorithm.  ...  on the SMAP salinity retrievals.  ... 
doi:10.3390/rs13245120 pmid:35136668 pmcid:PMC8819735 fatcat:qfuzo7i2ufdw5jyvqzrqg5vx2m

Weddell Sea polynya analysis using SMOS–SMAP apparent sea ice thickness retrieval

Alexander Mchedlishvili, Gunnar Spreen, Christian Melsheimer, Marcus Huntemann
2022 The Cryosphere  
By investigating thin (< 50 cm) apparent sea ice thickness (ASIT) retrieved from the satellite microwave sensors Soil Moisture and Ocean Salinity (SMOS) and Soil Moisture Active Passive (SMAP), we find  ...  Using fifth-generation ECMWF Reanalysis (ERA5) surface wind reanalysis data, we corroborate previous findings (e.g., Campbell et al., 2019; Francis et al., 2019; Wilson et al., 2019) on the strong impact  ...  SMOS-SMAP apparent sea ice thickness retrieval The spaceborne passive microwave sensors Soil Moisture and Ocean Salinity (SMOS) and Soil Moisture Active Passive (SMAP) work at 1.4 GHz (L-band), which allows  ... 
doi:10.5194/tc-16-471-2022 fatcat:napolvevq5hytfhwqottjzcwgu

Sea surface salinity estimates from spaceborne L-band radiometers: An overview of the first decade of observation (2010–2019)

N. Reul, S.A. Grodsky, M. Arias, J. Boutin, R. Catany, B. Chapron, F. D'Amico, E. Dinnat, C. Donlon, A. Fore, S. Fournier, S. Guimbard (+18 others)
2020 Remote Sensing of Environment  
Acknowledgements We would like to thank the contributions from three anonymous reviewers for comments and detailed editing of our draft which definitively helped to improve the paper.  ...  The EU authors acknowledge support of ESA in the frame of the SMOS ESL Level 2 phase 3 contract (https://smos.argans.co.uk/), the N. Reul, et al. Remote Sensing of Environment 242 (2020) 111769  ...  For SMOS and SMAP, retrieval algorithms must rely on external surface wind vector data, not always of sufficiently high quality to well characterize the actual impact of roughness on L-band passive sensors  ... 
doi:10.1016/j.rse.2020.111769 fatcat:4oa3ceryd5felg7y7ytbjtrrpq

Results of the Dragon 4 Project on New Ocean Remote Sensing Data for Operational Applications

Ferran Gibert, Jacqueline Boutin, Wolfgang Dierking, Alba Granados, Yan Li, Eduard Makhoul, Junmin Meng, Alexandre Supply, Ester Vendrell, Jean-Luc Vergely, Jin Wang, Jungang Yang (+3 others)
2021 Remote Sensing  
This paper provides an overview of the Dragon 4 project dealing with operational monitoring of sea ice and sea surface salinity (SSS) and new product developments for altimetry data.  ...  Combined Active and Passive, SSS retrieval under rain conditions, and the combination of active and passive microwave to study extreme winds.  ...  Anomaly SLC Single-Look Complex SMAP Soil Moisture Active Passive SMOS Soil Moisture and Ocean Salinity SRAL Sentinel-3 Ku/C Radar Altimeter SSH Sea Surface Height SSS Sea Surface Salinity  ... 
doi:10.3390/rs13142847 fatcat:jsh2gqsdkzhrhhetjpsw6f3aqi

Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements

Carlos Jiménez, Joseph Tenerelli, Catherine Prigent, Lise Kilic, Thomas Lavergne, Sotirios Skarpalezos, Jacob L. Hoeyer, Nicolas Reul, Craig Donlon
2021 Journal of Geophysical Research - Oceans  
The Copernicus Imaging Microwave Radiometer (CIMR) is a satellite system developed as part of the European Union Copernicus program expansion activities.  ...  Sea Surface Emissivity Model The ocean emissivity varies primarily with SST, SSS, and the Ocean Wind Speed (OWS).  ...  Plotted the sea surface temperature, sea surface salinity, ocean wind speed, total column water vapor, and total column liquid water global fields (left), the simulated top-ofatmosphere brightness temperature  ... 
doi:10.1029/2021jc017610 fatcat:to4xfvud5bbjze2cawpb57llsm

Satellite Observations for Detecting and Forecasting Sea-Ice Conditions: A Summary of Advances Made in the SPICES Project by the EU's Horizon 2020 Programme

Marko Mäkynen, Jari Haapala, Giuseppe Aulicino, Beena Balan-Sarojini, Magdalena Balmaseda, Alexandru Gegiuc, Fanny Girard-Ardhuin, Stefan Hendricks, Georg Heygster, Larysa Istomina, Lars Kaleschke, Juha Karvonen (+13 others)
2020 Remote Sensing  
and melt pond fraction and sea-ice concentration using Soil Moisture and Ocean Salinity (SMOS) radiometer data.  ...  New SPICES sea-ice products have a demonstrable level of maturity, and with a reasonable amount of further work they can be integrated into various operational sea-ice services.  ...  The SPICES sea-ice products have a demonstration level of maturity, and with a reasonable amount of further work, validation, and the setting up of operational product generation environments, they can  ... 
doi:10.3390/rs12071214 fatcat:lrqpgkkcrzbdpjxyn3uetckxre

Statistical Assessment of Sea-Surface Salinity from SMAP: Arabian Sea, Bay of Bengal and a Promising Red Sea Application

Viviane V. Menezes
2020 Remote Sensing  
The present work assesses the first four years of the National Aeronautics and Space Administration's Soil Moisture Active Passive (SMAP) satellite in the North Indian Ocean.  ...  Sea-surface salinity (SSS) is an essential climate variable connected to Earth's hydrological cycle and a dynamical component of ocean circulation, but its variability is not well-understood.  ...  Remote Sensing Systems produced the RSS SMAP data, which was sponsored by the NASA Ocean Salinity Science Team. The NASA EOSDIS PO distributed the CAP/JPL SMAP data and the MUR SST.  ... 
doi:10.3390/rs12030447 fatcat:dbhzi267dve3tpiiodfwqfdneq
« Previous Showing results 1 — 15 out of 106 results