Date ( Creation )

2021-02-16

Date ( Publication )

2021-04-23

Identifier

FR-330-715-368-00032-LOPS_WIND_UPWESATWIND

Identifier

DOI:10.12770/eea4bdf1-cfbc-4efc-8e34-fb69e8f02316

Credit

Ifremer - LOPS

GEMET - INSPIRE themes, version 1.0 ( Theme )

• Oceanographic geographical features

Thèmes Sextant ( Theme )

• /Chemical Environment/Water Column

Access constraints

Copyright

Use constraints

Other restrictions

Other constraints

Spatial representation type

Grid

Metadata language

English

Character set

UTF8

Topic category

• Oceans

Reference system identifier

EPSG / WGS 84 (EPSG:4326) / 8.6

Topology level

Geometry only

Number of dimensions

2

Dimension name

Column

Dimension name

Row

Cell geometry

Area

Distribution format

• ( )

OnLine resource

/home/ref-sat-dailywind/  

OnLine resource

Main publication  

Bentamy Abderrahim, Grodsky Semyon A, Cambon Gildas, Tandeo Pierre, Capet Xavier, Roy Claude, Herbette Steven, Grouazel Antoine (2021). Twenty-Seven Years of Scatterometer Surface Wind Analysis over Eastern Boundary Upwelling Systems . Remote Sensing , 13(5), 940 (28p.) . Publisher's official version : https://doi.org/10.3390/rs13050940 , Open Access version : https://archimer.ifremer.fr/doc/00682/79416/

OnLine resource

DOI of the dataset  

DOI of the dataset

Hierarchy level

Dataset

Statement

More than twelve satellite scatterometers have operated since 1992 through the present providing the main source of surface wind vector observations over global oceans. In this study, these scatterometer winds are used in combination with radiometers and synthetic aperture radars (SAR) for better determination and characterization of high spatial and temporal resolution of regional surface wind parameters, including wind speed and direction, wind stress components, wind stress curl and divergence. 27-year long (1992 – 2018) 6-hourly satellite wind analysis with a spatial resolution of 0.125° in latitude and longitude is calculated using spatial structure functions derived from high-resolution SAR data. The main objective is to improve regional winds over three major upwelling regions (the Canary, Benguela, and California regions) through the use of accurate and homogenized wind observations and region-specific spatial and temporal wind variation structure functions derived from buoy and SAR data. The long time series of satellite wind analysis over the California upwelling, where a significant number of moorings is available, are used for assessing the accuracy of the analysis. The latter is close to scatterometer wind retrieval accuracy. This assessment shows that the root-mean-square difference between collocated 6-hourly satellite wind analysis and buoys is lower than 1.50 m s-1 and 1.80 m s-1 for offshore and nearshore locations, respectively. The temporal correlation between buoy and satellite analysis winds exceeds 0.90. The analysis accuracy is lower for 1992 – 1999 when satellite winds were mostly retrieved from ERS-1 and/or ERS-2 scatterometers. To further assess the improvement brought by this new wind analysis, its data and data from three independent products (ERA5, CMEMS, and CCMP) are compared with purely scatterometer winds over the Canary and Benguela regions. Even though the four products are generally similar, the new satellite analysis shows significant improvements, particularly in the upwelling areas.

Metadata

File identifier

eea4bdf1-cfbc-4efc-8e34-fb69e8f02316   XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Date stamp

2021-04-23T11:13:58

Metadata standard name

ISO 19115:2003/19139 - SEXTANT

Metadata standard version

1.0