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Earth History – Environmental History Lab
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A lab that explores Earth's environment and human history through radiocarbon (14C) dating.
AboutAbout the lab
Dating samples to explore Earth's environment and human history.
The Environmental History Lab conducts research using 14C (carbon-14) dating in the Division for Chronological Research at the Institute for Space-Earth Environmental Research.
Using 14C dating, the lab studies changes in Earth's environment and the history of human culture going back about 60,000 years.
It also uses finer-resolution dating to investigate the intervals at which active faults and volcanoes have been active.
This introduction is for the Tandetron Dating Research Group in the Division for Chronological Research. The division takes part in the Earth History Course, a cooperating course of the Graduate School of Environmental Studies.
Key terms
- 14C
- Carbon (carbon-14) that emits radiation and decays at a constant rate. The age of a sample is determined from the amount remaining.
- Accelerator mass spectrometry (AMS)
- An analytical method that accelerates atoms and separates them by mass in order to count extremely small amounts of isotopes such as 14C.
- Active fault
- A fault that has moved repeatedly in recent geological time and is expected to move again, causing earthquakes.
ResearchResearch themes
Using 14C dating with a Tandetron accelerator mass spectrometer, the lab studies changes in Earth's environment and the history of human culture going back about 60,000 years. It also supports the development of new dating methods from the standpoint of 14C ages.
*Illustrative imageGlobal Environmental Change and Human Cultural History
Using 14C dating, the lab studies changes in Earth's environment and the history of human culture going back about 60,000 years. It also supports the development of new dating methods from the standpoint of 14C ages.
*Illustrative imageActive Fault and Volcano Cycles and Environmental Prediction
The lab analyzes the activity cycles of active faults and volcanoes using finer-resolution dating. It also studies predictions of Earth's near-future environment by analyzing how 14C concentrations vary over time and place.
MembersFaculty
- ProfessorHiroyuki Kitagawa
- Assistant ProfessorHirotaka Oda
- Assistant ProfessorHisashi Hayakawa
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “1 MV accelerator mass spectrometer” 作者不詳 / Public domain (cropped)
- Global Environmental Change and Human Cultural History: “Priniatikos Pyrgos 38” Olaf Tausch / CC BY 3.0 (cropped)
- Active Fault and Volcano Cycles and Environmental Prediction: “Fimmvorduhals dawn” Boaworm / CC BY 3.0 (cropped)
- Related lab (Geochronology Lab): “EPMA GTK Espoo” Kallerna / CC BY-SA 4.0 (cropped)
- Related lab (Global Environmental Change Lab): “GRINNELL GLACIER LANDSCAPE B FOOTAGE ( )” GlacierNPS / Public domain (cropped)
- Related lab (Global Water Cycle Science Division, Oceanography Lab): “Infrared satellite image from the Pacífic Ocean” GOES Satellites / Public domain (cropped)
- Related lab (Geology and Geobiology Lab): “Rock Strata in Glen Nevis” Bill Kasman / CC BY-SA 4.0 (cropped)
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