Variability and Uncertainty of Satellite Sea Surface Salinity in the Subpolar North Atlantic (2010–2019)
Satellite remote sensing of sea surface salinity (SSS) in the recent decade (2010-2019) has proven the capability of L-band (1.4 GHz) measurements to resolve SSS spatiotemporal variability in the tropical and subtropical oceans. However, the fidelity of SSS retrievals in cold waters at mid-high lati...
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ftdoajarticles:oai:doaj.org/article:6d30d6815be448f6bb9374bb8862b335 2023-05-15T15:09:06+02:00 Variability and Uncertainty of Satellite Sea Surface Salinity in the Subpolar North Atlantic (2010–2019) Lisan Yu 2020-06-01T00:00:00Z https://doi.org/10.3390/rs12132092 https://doaj.org/article/6d30d6815be448f6bb9374bb8862b335 EN eng MDPI AG https://www.mdpi.com/2072-4292/12/13/2092 https://doaj.org/toc/2072-4292 doi:10.3390/rs12132092 2072-4292 https://doaj.org/article/6d30d6815be448f6bb9374bb8862b335 Remote Sensing, Vol 12, Iss 2092, p 2092 (2020) sea surface salinity subpolar North Atlantic SMAP SMOS Argo harmonic analysis Science Q article 2020 ftdoajarticles https://doi.org/10.3390/rs12132092 2022-12-31T04:00:15Z Satellite remote sensing of sea surface salinity (SSS) in the recent decade (2010-2019) has proven the capability of L-band (1.4 GHz) measurements to resolve SSS spatiotemporal variability in the tropical and subtropical oceans. However, the fidelity of SSS retrievals in cold waters at mid-high latitudes has yet to be established. Here, four SSS products derived from two satellite missions were evaluated in the subpolar North Atlantic Ocean in reference to two in situ gridded products. Harmonic analysis of annual and semiannual cycles in in situ products revealed that seasonal variations of SSS are dominated by an annual cycle, with a maximum in March and a minimum in September. The annual amplitudes are larger (>0.3 practical salinity scale (pss)) in the western basin where surface waters are colder and fresher, and weaker (~0.06 pss) in the eastern basin where surface waters are warmer and saltier. Satellite SSS products have difficulty producing the right annual cycle, particularly in the Labrador/Irminger seas where the SSS seasonality is dictated by the influx of Arctic low-salinity waters along the boundary currents. The study also found that there are basin-scale, time-varying drifts in the decade-long SMOS data records, which need to be corrected before the datasets can be used for studying climate variability of SSS. Article in Journal/Newspaper Arctic North Atlantic Directory of Open Access Journals: DOAJ Articles Arctic Western Basin Remote Sensing 12 13 2092 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sea surface salinity subpolar North Atlantic SMAP SMOS Argo harmonic analysis Science Q |
spellingShingle |
sea surface salinity subpolar North Atlantic SMAP SMOS Argo harmonic analysis Science Q Lisan Yu Variability and Uncertainty of Satellite Sea Surface Salinity in the Subpolar North Atlantic (2010–2019) |
topic_facet |
sea surface salinity subpolar North Atlantic SMAP SMOS Argo harmonic analysis Science Q |
description |
Satellite remote sensing of sea surface salinity (SSS) in the recent decade (2010-2019) has proven the capability of L-band (1.4 GHz) measurements to resolve SSS spatiotemporal variability in the tropical and subtropical oceans. However, the fidelity of SSS retrievals in cold waters at mid-high latitudes has yet to be established. Here, four SSS products derived from two satellite missions were evaluated in the subpolar North Atlantic Ocean in reference to two in situ gridded products. Harmonic analysis of annual and semiannual cycles in in situ products revealed that seasonal variations of SSS are dominated by an annual cycle, with a maximum in March and a minimum in September. The annual amplitudes are larger (>0.3 practical salinity scale (pss)) in the western basin where surface waters are colder and fresher, and weaker (~0.06 pss) in the eastern basin where surface waters are warmer and saltier. Satellite SSS products have difficulty producing the right annual cycle, particularly in the Labrador/Irminger seas where the SSS seasonality is dictated by the influx of Arctic low-salinity waters along the boundary currents. The study also found that there are basin-scale, time-varying drifts in the decade-long SMOS data records, which need to be corrected before the datasets can be used for studying climate variability of SSS. |
format |
Article in Journal/Newspaper |
author |
Lisan Yu |
author_facet |
Lisan Yu |
author_sort |
Lisan Yu |
title |
Variability and Uncertainty of Satellite Sea Surface Salinity in the Subpolar North Atlantic (2010–2019) |
title_short |
Variability and Uncertainty of Satellite Sea Surface Salinity in the Subpolar North Atlantic (2010–2019) |
title_full |
Variability and Uncertainty of Satellite Sea Surface Salinity in the Subpolar North Atlantic (2010–2019) |
title_fullStr |
Variability and Uncertainty of Satellite Sea Surface Salinity in the Subpolar North Atlantic (2010–2019) |
title_full_unstemmed |
Variability and Uncertainty of Satellite Sea Surface Salinity in the Subpolar North Atlantic (2010–2019) |
title_sort |
variability and uncertainty of satellite sea surface salinity in the subpolar north atlantic (2010–2019) |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/rs12132092 https://doaj.org/article/6d30d6815be448f6bb9374bb8862b335 |
geographic |
Arctic Western Basin |
geographic_facet |
Arctic Western Basin |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_source |
Remote Sensing, Vol 12, Iss 2092, p 2092 (2020) |
op_relation |
https://www.mdpi.com/2072-4292/12/13/2092 https://doaj.org/toc/2072-4292 doi:10.3390/rs12132092 2072-4292 https://doaj.org/article/6d30d6815be448f6bb9374bb8862b335 |
op_doi |
https://doi.org/10.3390/rs12132092 |
container_title |
Remote Sensing |
container_volume |
12 |
container_issue |
13 |
container_start_page |
2092 |
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1766340337282842624 |