Unfortunately, our knowledge of weather-timescale extreme events (i.e., paleoweather occurring in days or even hours and minutes), such as tropical cyclones, cold/heat waves, and rainstorms under different climate conditions, is almost absent because current paleoclimatic reconstructions rarely provide information with temporal resolutions shorter than a month. A new Chinese study may remedy this problem, though.
Recently, a research team led by Prof. YAN Hong, from the Institute of Earth Environment (IEE) of the Chinese Academy of Sciences, found that shells of the Giant Clam (Tridacna, the largest bivalve species in the ocean) from the western Pacific have clear and continuous daily growth bands.
Several daily to hourly biological and geochemical records, including daily growth rate, hourly element/Ca ratios and fluorescence intensity, were developed from the daily bands of Tridacna shells.
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