Message From Fred Spilhaus to AGU Members
نویسندگان
چکیده
Two underground detectors, in Japan and Italy, are currently recording interactions of highly penetrating particles called geoneutrinos, which are naturally produced inside the Earth. By measuring the geoneutrino flux, these pioneering projects along with several other projects that are being planned are advancing constraints on the contribution of radioactive elements to Earth’s heat budget in a novel way. The detector in Japan, which has been in operation the longest, now measures the geoneutrino flux with precision better than a model prediction. Future projects dedicated to measuring and modeling the planet’s geoneutrino flux would define the amount and distribution of heat-producing elements in the Earth and provide transformative insights into the thermal history and dynamic processes of the mantle. Geoneutrino measurements provide experimental evidence for the quantity and distribution of radioactive elements internally heating Earth. Radiogenic heating helps power plate tectonics, hot spot volcanism, mantle convection, and possibly the geodynamo. Information on the extent and location of this heating better defines the thermal dynamics and chemical composition of Earth. Given the enormous technological challenges for directly sampling deepEarth reservoirs, remotely sensing radioactive elements with geoneutrinos may furnish the first access to this information. Geoneutrinos are electron antineutrinos emitted in the beta decay of longlived terrestrial isotopes and their daughters [Fiorentini et al., 2007]. Isotopes contributing significantly to terrestrial heating are Message From Fred Spilhaus to AGU Members
منابع مشابه
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تاریخ انتشار 2008