.‘b A Comparison of NASA Scatterometer and ECMWF Winds and their Oceanic Response over the
Wind taken from the National Aeronautics and Space Administration (NASA) scatterometer (NSCAT) is compared with the operational analysis from European Center for Medium-Range Fore-cast (ECMWF) for the entire duration (about 9 months) of the NSCAT mission. Spectral analysis of the raw scatterometer d...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.499.4506 http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/19487/1/98-0897.pdf |
| Summary: | Wind taken from the National Aeronautics and Space Administration (NASA) scatterometer (NSCAT) is compared with the operational analysis from European Center for Medium-Range Fore-cast (ECMWF) for the entire duration (about 9 months) of the NSCAT mission. Spectral analysis of the raw scatterometer data (along satellite swaths) shows a much higher energy content than that of the ECMWF analysis. To produce a gridded NSCAT wind suitable for driving ocean models, we adapt a Gaussian weighted window on the scatterometer wind and data gaps are fdled in with the ECMWF wind. Spectral analysis of this blended product shows little energy difference from the ECMWF product in the range of 1000-500 km but a significantly higher energy content with spatial scale shorter than NSCAT and 500 km, and obeys the k-2 power law well into the high wavenumber region. Both ECMWF winds are then used to drive an eddy-resolving North Atlantic Ocean model with a resolution of 1/6 degree and 37 vertical levels. Results show that in the Gulf Stream region both the NSCAT and ECMWF wind-driven model compare well with TOPEX data, while in the eastern subtropical region, the NSCAT wind-driven model simulates a more realistic synoptic variability of the sea surface height field. |
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