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Blended Sea Winds |
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| Summary | Data Access | Frequently Asked Questions | Bibliography | Contact |
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Summary |
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The Blended Sea Winds contain globally gridded, high resolution ocean surface vector winds and wind stresses on a global 0.25° grid, and multiple time resolutions of 6-hourly, daily, monthly, and 11-year (1995-2005) climatological monthlies. The period of record is 9 July 1987 - present. The wind speeds were generated by blending observations from multiple satellites (up to six satellites since June 2002; Figure 2). The wind directions came from two sources depending on the products: for the research products the source is the NCEP Reanalysis 2 (NRA-2) and for near-real-time products the source is the ECMWF NWP. The wind directions were interpolated onto the blended speed grids. |
Figure 1 - Click on image to see latest animation (3mb) Please read disclaimer for the near-real-time products |
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Please note that these are research products, thus, they are considered as experimental in nature. Users are encouraged to register to receive update notices and to provide comments. |
Figure4 - click on image for larger view |
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Data Access |
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Note: We encourage users to register to receive product update notices by e-mail. The global 0.25° grid data are available in netCDF and IEEE format for the period of record, July 1987 to present, with time resolutions of 6-hourly, daily, and monthly. There is also a 11-year (1995-2005) monthly climatological data set. Users can use the data with support reading programs in FORTRAN, MATLAB, and GrADS. The data servers below will also allow users to subset, visualize and download data in many formats (e.g. text, graphics, etc.) Users can access the data files via the following methods:
A version of NRT (about a 24-hour delay) Blended Sea Winds is produced quasi-daily to satisfy the needs of some users. Since the updates are done automatically under a non-operational environment (no 24/7 IT support), timely production is not guaranteed. Also, please note that the NRT data are replaced by the delayed-mode research quality data (Version 1.2) on a monthly basis. The data archive locations are the same for both the NRT and Research Quality products. File naming conventions are very similar, i.e. uv20080101rt.nc (NRT with 'rt'=real time) and uv20080101.nc (Research Quality - ver 1.2). Update Oct. 6, 2011: Seawinds production has been impacted because of the loss of data from the AMSR-E instrument. Input data from two additional satellites (SSMI F15 ver.6 and F17 ver.7) are now added to the experimental near-real-time Blended Sea Winds. Users should exercise caution until the characteristics of the modified Seawinds product have been established. Aqua/AMSR-E press release. |
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Frequently Asked Questions |
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Please check out the FAQ file and the Readme file. Should you have further questions, please contact Huai-Min.Zhang@noaa.gov.
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Bibliography |
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Zhang, H.-M., J.J. Bates, and R.W. Reynolds, 2006: "Assessment of composite global sampling: Sea surface wind speed". Geophysical Research Letters, VOL. 33, L17714, doi:10.1029/2006GL027086. Zhang, H.-M., R.W. Reynolds, and J.J. Bates, 2006: "Blended and Gridded High Resolution Global Sea Surface Wind Speed and Climatology from Multiple Satellites: 1987 - Present". American Meteorological Society 2006 Annual Meeting, Paper #P2.23, Atlanta, GA, January 29 - February 2, 2006. |
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Contact |
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Dr. Huai-Min Zhang |
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Downloaded Thursday, 01-Aug-2013 11:17:19 EDT Last Updated Tuesday, 13-Dec-2011 11:41:51 EST Please see the NCDC Contact Page if you have questions or comments. |