NOAA NCEI Blended Seawinds (NBS v2)

jebidiah.jeffery — Thu, 15 Sep 2022 16:54:41 +0000

jebidiah.jeffery Thu, 09/15/2022 - 12:54

The NOAA NCEI Blended Seawinds (NBS) version 2.0 dataset synthesizes observations from multiple satellites (up to seven satellites since June 2002) to create gridded wind speeds . This is an updated version of the existing NOAA NBS v1.0, which is a global gridded 0.25° and 6-hourly sea surface winds product that has wide applications in marine transportation, marine ecosystem and fisheries, offshore winds, weather and ocean forecasts, and other areas. Blending the data from multiple satellites fills in the temporal and spatial data gaps present in each source dataset, and reduces subsampling aliases and random errors. These satellites include scatterometers and microwave radiometers/imagers, which do not provide accurate observations of intensive high-speed hurricane winds because their signals saturate in very high winds or degrade in the presence of rain.
Recent advancements in satellite wind retrievals revealed that the L-band (1.42 GHz) instrument on the Soil Moisture Active Passive (SMAP) satellite and the AMSR2 All-Weather channel (~6.9 GHz) can provide accurate hurricane winds of up to 65 m/s (145 MPH) without being affected by rain; these data are incorporated in a new version of the Blended Sea Winds, NBS v2.0, using a multi-sensor data fusion technique based on random errors, enabling it to resolve very high winds, especially along the eyewalls of tropical cyclones and hurricanes. NBS v2.0 provides both a long-term record of >30 years retrospectively since July 1987 and a near-real-time (NRT) mode with 1-day latency. With the present seven satellites, there are very few data gaps over the global ocean in the 6-hourly interpolated fields, and those gaps are mostly in the higher latitudes (beyond 40°N or S). To produce a version of “gap-free” Level 4 wind data, the few remaining gaps are filled with the ERA-5 reanalysis winds in the delayed mode NBS (latency and cycle of a month) and with NOAA/NCEP/GFS forecast winds in the NRT version. The reanalysis or forecast data are also used to calculate the wind directions, which is essential to retrieve wind and wind stress components.

These products were developed in response to the increasing demand for higher resolution global datasets, and can be used to improve the accuracy of ocean and weather conditions forecasts. Please contact ncei.satellite.ocean.internal@noaa.gov for more information about these products.

Temporal Start Date

September 7, 1987

Temporal Coverage

Temporal: 6 hour, 1 day, 1 month; beginning July 1987

Product Families

Sea Surface Winds

Saha, K.; Huai-Min, Z. Hurricane and Typhoon Storm Wind Resolving NOAA NCEI Blended Sea Surface Wind (NBS) Product. Frontiers in Marine Sciences – Ocean Observation 2022, 9, 1–12. https://doi.org/10.3389/fmars.2022.935549.
Peng, G., H.-M. Zhang, H.P. Frank, J.-R. Bidlot, M. Higaki, S. Stevens, and W.R. Hankins, 2013: Evaluation of various surface wind products with OceanSITES buoy measurements. Weather and Forecasting, 28, 1281–1303, https://doi.org/10.1175/WAF-D-12-00086.1.
Zhang, H.-M., J. J. Bates, and R. W. Reynolds, 2006: Assessment of composite global sampling: Sea surface wind speed, Geophysical Research Letters, 33, L17714, https://doi.org/10.1029/2006GL027086.
Zhang, H.-M., R.W. Reynolds, and J.G. Bates, 2006: Blended and gridded high resolution global sea surface wind speed and climatology from multiple satellites: 1987–present. 14th Conference on Satellite Meteorology and Oceanography, Atlanta, GA, American Meteorological Society, Paper 100004. [https://ams.confex.com/ams/Annual2006/webprogram/Paper100004.html].

Measurements

Sea Surface Vector Winds

Processing Levels

Level 4

Spatial Coverage

Global

Saha, K.; Huai-Min, Z. Hurricane and Typhoon Storm Wind Resolving NOAA NCEI Blended Sea Surface Wind (NBS) Product. Frontiers in Marine Sciences – Ocean Observation 2022, 9, 1–12. https://doi.org/10.3389/fmars.2022.935549.

Latency Groups

0 Hours <= 24 Hours (NRT)

24+ hours (Delayed)

Latency Details

24 hrs (for NRT)

Spatial Resolution Groups

2km+

Spatial Resolution Details

0.25°

Platforms

Instruments

Data Providers

NOAA

NESDIS

NCEI

STAR

Product DOI

https://doi.org/10.3389/fmars.2022.935549

Data Tool Links

Near Real-time: Coming Soon

Wind (6 hr [vector] + Daily [raster]): portal

Wind Stress (taux,tauy): portal -- coming soon

Science:

Wind (6 hr [vector] + Daily [raster]): portal

Wind Stress (taux,tauy): portal -- coming soon

Sample Filenames

Retrospective:

NBSv02_wind_6hourly_YYYYMMDD.nc

NBSv02_wind_stress_6hourly_YYYYMMDD.nc,

NBSv02_wind_daily_YYYYMMDD.nc,

NBSv02_wind_stress_daily_YYYYMMDD.nc,

NBSv02_wind_monthly_YYYYMM.nc,

NBSv02_wind_stress_monthly_YYYYMM.nc

NRT:

NBSv02_wind_6hourly_YYYYMMDD_nrt.nc

NBSv02_wind_stress_6hourly_YYYYMMDD_nrt.nc

NBSv02_wind_daily_YYYYMMDD_nrt.nc

NBSv02_wind_stress_daily_YYYYMMDD_nrt.nc

HTTPS

Near Real-time:

Wind (magnitude+uv components): https://coastwatch.noaa.gov/data/pub0015/coastwatch/blended/wind/nrt/uvcomp/

Wind Stress (taux,tauy): https://coastwatch.noaa.gov/data/pub0015/coastwatch/blended/wind/nrt/stress/

Science:

Wind (magnitude+uv components): https://coastwatch.noaa.gov/data/pub0015/coastwatch/blended/wind/science/uvcomp/

Wind Stress (taux,tauy): http://coastwatch.noaa.gov/data/pub0015/coastwatch/blended/wind/science/stress/

THREDDS

NRT and Science:

https://coastwatch.noaa.gov/thredds/socd/coastwatch/catalog_ncei_global_winds.html

ERDDAP

NRT and Science:

https://coastwatch.noaa.gov//erddap/search/index.html?page=1&itemsPerPage=1000&searchFor=noaacwBlendedWind

AMSR2 - Sea Ice Concentration

jebidiah.jeffery — Thu, 17 Mar 2022 14:32:01 +0000

AMSR2 - Sea Ice Concentration

NOAA CoastWatch / OceanWatch / PolarWatch Sea Ice Concentration, Level 3, daily and daily 4-day rolling merge, polar stereographic mapped composites - AMSR-2

jebidiah.jeffery Thu, 03/17/2022 - 10:32

The second Advanced Microwave Scanning Radiometer 2 (AMSR-2) on JAXA's Global Climate Observation Mission - Water 1 (GCOM-W1)
Daily composites and daily 4-day rolling merge composites
10 km spatial resolution
Polar Stereographic projections for North Pole and South Pole
Microwave not impacted by clouds
Source data from NOAA OSPO; NOGAPS algorithm developed by NOAA STAR (Paul Chang, Lead)

Temporal Coverage

Daily and
Daily 4-day rolling merge

Product Families

Polar Sea Ice

STAR Development (Paul Chang, Lead)

https://manati.star.nesdis.noaa.gov/gcom

OSPO Monitoring and Documentation

https://www.ospo.noaa.gov/Products/atmosphere/gpds/algo.html

Measurements

Sea Ice Concentration

Processing Levels

Level 3

Spatial Coverage

Polar (Artic/Antarctic)

Latency Groups

0 Hours <= 24 Hours (NRT)

Latency Details

Approximately 12 to 24 hours

Spatial Resolution Groups

2km+

Spatial Resolution Details

10 km

Platforms

GCOM-W

Instruments

AMSR2

Data Providers

JAXA

NASA

NOAA

NESDIS

OSPO

Data Tool Links

CoastWatch Near Real-Time Search

Sample Filenames

GWXCW_W2019203_C15_002140_020039_033940_051540_065439_083040_100940_114840_132440_150341_164242_182143_200342_214543_224240_NP06_IceConc.nc

Where:
GWXCW is
W2019203 is W year and day of year: WYYYYdoy
C15 indicates number of granules in composite (generally 14 or 15)
Series of 6 digit numbers are start times each granule included in the composite
NP06 (or SP06) indicates mapped to Polar Stereographic Projection for North Pole (NP06) or South Pole (SP06)
Ice Conc is product name = Ice Concentration
.nc is NetCDF format (CF compliant)

THREDDS

Aggregated and Per-file Views:

https://www.star.nesdis.noaa.gov/thredds/socd/coastwatch/catalog_amsr2_gw1_ice_conc_daily.html

Top Level Sea Ice Catalog:

https://www.star.nesdis.noaa.gov/thredds/socd/coastwatch/catalog_coastwatch_ice.html

ERDDAP

https://coastwatch.noaa.gov/erddap/search/index.html?page=1&itemsPerPage=1000&searchFor=Ice+AMSR2