Aquarius and Remote Sensing of Sea Surface Salinity from Space

Vine, David M. Le; Lagerloef, Gary; Torrusio, Sandra

doi:10.1109/jproc.2010.2040550

Cited by 181 publications

(84 citation statements)

References 61 publications

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“…Aquarius is a NASA instrument aboard the Argentine Satelite de Aplicaciones Cientificas-D (SAC-D) spacecraft [1]. Aquarius/SAC-D was placed in a sun-synchronous orbit at an altitude of 657 km on June 10, 2011.…”

Section: Description Of the Aquarius Instrumentmentioning

confidence: 99%

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Global Soil Moisture From the Aquarius/SAC-D Satellite: Description and Initial Assessment

Bindlish

Jackson

Cosh

et al. 2015

IEEE Geosci. Remote Sensing Lett.

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Abstract-Aquarius satellite observations over land offer a new resource for measuring soil moisture from space. Although Aquarius was designed for ocean salinity mapping, our objective in this investigation is to exploit the large amount of land observations that Aquarius acquires and extend the mission scope to include the retrieval of surface soil moisture. The soil moisture retrieval algorithm development focused on using only the radiometer data because of the extensive heritage of passive microwave retrieval of soil moisture. The single channel algorithm (SCA) was implemented using the Aquarius observations to estimate surface soil moisture. Aquarius radiometer observations from three beams (after bias/gain modification) along with the National Centers for Environmental Prediction model forecast surface temperatures were then used to retrieve soil moisture. Ancillary data inputs required for using the SCA are vegetation water content, land surface temperature, and several soil and vegetation parameters based on land cover classes. The resulting global spatial patterns of soil moisture were consistent with the precipitation climatology. Initial assessments were performed using in situ observations from the U.

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Section: Description Of the Aquarius Instrumentmentioning

confidence: 99%

“…A QUARIUS is an L-band radiometer and scatterometer instrument combination designed to map ocean surface salinity from space [1]. The primary science objective of the Aquarius mission is to monitor the seasonal and interannual variation of the large-scale features of the surface salinity field in the open ocean.…”

Section: Introductionmentioning

confidence: 99%

Global Soil Moisture From the Aquarius/SAC-D Satellite: Description and Initial Assessment

Bindlish

Jackson

Cosh

et al. 2015

IEEE Geosci. Remote Sensing Lett.

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“…After that, the microwave airborne sensors such as Scanning Low Frequency Microwave Radiometer (SLFMR) and then the Salinity, Temperature And Roughness Remote Scanner (STAARS) have been applied for measuring salinity but due to limitations in their range of performance could not map the salinity at large regions of oceans (Klemas, 2011). With remote sensing satellites, possibility of achieving to data with more spatial resolution has been provided (Le Vine et al, 2010). For example, Soil Moisture and Ocean Salinity (SMOS) European satellite has been launched to space at November 2009 so that it measured the salinity at spatial resolution of about 50 km and 0.5 psu accuracy (Klemas, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…It is a joint venture between NASA and the Argentinean Space Agency, CONAE (Comisión Nacional de Actividades Espaciales). Aquarius' ability to consistently map the oceans and measure global SSS with an average accuracy of 0.2 psu helps us better prediction of climate condition (Le Vine et al, 2010). The changes in SSS concentration can originate from different sources.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Analysis of Sea Surface Salinity Using Satellite Imagery in Gulf of Mexico

Rajabi

Hasanlou

Safari

2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:The recent development of satellite sea surface salinity (SSS) observations has enabled us to analyse SSS variations with high spatiotemporal resolution. In this regards, The Level3-version4 data observed by Aquarius are used to examine the variability of SSS in Gulf of Mexico for the 2012-2014 time periods. The highest SSS value occurred in April 2013 with the value of 36.72 psu while the lowest value (35.91 psu) was observed in July 2014. Based on the monthly distribution maps which will be demonstrated in the literature, it was observed that east part of the region has lower salinity values than the west part for all months mainly because of the currents which originate from low saline waters of the Caribbean Sea and furthermore the eastward currents like loop current. Also the minimum amounts of salinity occur in coastal waters where the river runoffs make fresh the high saline waters. Our next goal here is to study the patterns of sea surface temperature (SST), chlorophyll-a (CHLa) and fresh water flux (FWF) and examine the contributions of them to SSS variations. So by computing correlation coefficients, the values obtained for SST, FWF and CHLa are 0.7, 0.22 and 0.01 respectively which indicated high correlation of SST on SSS variations. Also by considering the spatial distribution based on the annual means, it found that there is a relationship between the SSS, SST, CHLa and the latitude in the study region which can be interpreted by developing a mathematical model.

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“…In the last decade, three space missions have been launched with L-band radiometers on-board: the Soil Moisture and Ocean Salinity (SMOS) mission , the Aquarius/SAC-D mission (Le Vine et al, 2010), and the Soil Moisture Active and Passive (SMAP) mission (Entekhabi et al, 2010).…”

mentioning

confidence: 99%

Comparison of measured brightness temperatures from SMOS with modelled ones from ORCHIDEE and H-TESSEL over the Iberian Peninsula

Barella-Ortiz

Polcher

Rosnay

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. L-band radiometry is considered to be one of the most suitable techniques to estimate surface soil moisture (SSM) by means of remote sensing. Brightness temperatures are key in this process, as they are the main input in the retrieval algorithm which yields SSM estimates. The work exposed compares brightness temperatures measured by the SMOS mission to two different sets of modelled ones, over the Iberian Peninsula from 2010 to 2012. The two modelled sets were estimated using a radiative transfer model and state variables from two land-surface models: (i) OR-CHIDEE and (ii) H-TESSEL. The radiative transfer model used is the CMEM.Measured and modelled brightness temperatures show a good agreement in their temporal evolution, but their spatial structures are not consistent. An empirical orthogonal function analysis of the brightness temperature's error identifies a dominant structure over the south-west of the Iberian Peninsula which evolves during the year and is maximum in autumn and winter. Hypotheses concerning forcing-induced biases and assumptions made in the radiative transfer model are analysed to explain this inconsistency, but no candidate is found to be responsible for the weak spatial correlations at the moment. Further hypotheses are proposed and will be explored in a forthcoming paper. The analysis of spatial inconsistencies between modelled and measured TBs is important, as these can affect the estimation of geophysical variables and TB assimilation in operational models, as well as result in misleading validation studies.

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Aquarius and Remote Sensing of Sea Surface Salinity from Space

Abstract: -Aquarius is an L-band radiometer and scatterometer instrument combination designed to map the salinity field at the surface of the ocean from space

Cited by 181 publications

References 61 publications

Global Soil Moisture From the Aquarius/SAC-D Satellite: Description and Initial Assessment

Global Soil Moisture From the Aquarius/SAC-D Satellite: Description and Initial Assessment

Spatial and Temporal Analysis of Sea Surface Salinity Using Satellite Imagery in Gulf of Mexico

Comparison of measured brightness temperatures from SMOS with modelled ones from ORCHIDEE and H-TESSEL over the Iberian Peninsula

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