1.5. Atmosphere, wind & waves
Studying atmospheric effects, marine meteorology and the impact of ocean features and conditions on the weather are all possible using altimetry data.
Altimetry data are used to compute wave height and wind velocity. Today, altimetry makes it possible to access such information in near-real time (within 3 to 48 hours) and to improve weather forecasting models by assimilating these data in them. Moreover, with 15 years of altimetry data, wave height and wind speed statistics, and seasonal and interannual variations can be used to study the whole ocean, or regional areas, for purposes such as offshore industries or navigation.
Using altimetry to study hurricanes is not limited to measuring the very high waves and strong winds, and assimilating them real-time in some forecasting models. It can also help identify the warm features that can cause these storms to intensify. Thus sea surface height anomalies can be used as proxies of the warm currents that provide the hurricanes with their energy source.
Another application of altimetry linked to atmospheric phenomena is the use of dual-frequency altimeters to acquire rain rates over the entire ocean, where there are very few meteorological stations.
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