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Near-surface wind is one of the most important meteorological parameters. Near-surface wind grid products are an important part of live analysis products . Reliable near-surface wind products have an important role in the monitoring, prediction, and study of wind disasters. The evaluation of near-surface wind products can provide the direction for improving the data quality for Hainan, provide basic support for fine-grid forecasting and meteorological services, and help to reduce the losses that are caused by wind disasters.
2. Surface Meteorological Observation Data
|Position||Element||Time Interval||Number of Stations||Time Range|
|Surface||10 m wind speed (2 min average),
10 m wind direction (2 min average)
|Hourly||410 stations of Hainan Province||3 April–31 October 2020|
3. ERA5 Near Surface Wind Data Product
|Item||Position||Element||Resolution/°||Time interval||Time Range|
|ERA5||Surface||10 m U wind, 10 mV wind||0.25||Hourly||3 April–31 October 2020|
|HRCLDAS||Surface||10 m U wind, 10 mV wind||0.01||Hourly||3 April–31 October 2020|
4. HRCLDAS Near Surface Wind Data Product
5. Analysis of Time Series Variation
6. Comparative Analysis of Land and Sea
The performance of the two wind data products from April to October 2020 for Hainan Island land stations and island stations, respectively, were evaluated to analyze the performance of ERA5 and HRCLDAS wind products over land and sea. There are 70 island stations in Hainan Province, and Figure 3 shows the evaluation results.
Figure 3. Evaluation indicators of ERA5 and HRCLDAS for land and sea. Bias of near-surface wind speed (a), wind direction (d), U component (g), and V component (j); RMSE of near-surface wind speed (b), wind direction (e), U component (h), and V component (k); COR of near-surface wind speed (c), wind direction (f), U component (i), and V component (l).
In general, HRCLDAS wind products had a smaller bias, smaller RMSE, and larger COR for both land and sea islands when compared with ERA5. The quality of the HRCLDAS and ERA5 wind products for islands was slightly better than that for land.
The entry is from 10.3390/atmos12060766
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