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Paleoenvironmental Studies Lab
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A lab for paleoenvironmental reconstruction that reads past climate change from seafloor sediments.
AboutAbout the lab
Reading past climate from seafloor sediments.
The Paleoenvironmental Studies Lab conducts paleoenvironmental reconstruction, deciphering past climate change recorded in seafloor sediments.
Over the past 800,000 years, Earth's climate has repeatedly fluctuated in what are called glacial–interglacial cycles.
The lab classifies microfossils contained in seafloor sediments under the microscope, and uses changes in assemblage composition and chemical analyses to gain clues for deciphering the history of environmental and climate change at the time.
Lab visits are accepted at any time.
Key terms
- Glacial–interglacial cycle
- Periodic climate change between glacial and interglacial periods, in which continental ice sheets repeatedly expand and shrink.
- Microfossil
- Fossils of plankton so small that they cannot be seen with the naked eye. They are abundant in seafloor sediments and are classified under a microscope.
- Proxy
- An indirect record of past environments. Past ocean environments are reconstructed from various proxies in seafloor sediments.
ResearchResearch themes
Sediments that have accumulated on the seafloor are natural recorders of past changes in Earth's environment. Using microfossils and proxies (indirect records of past environments) in the sediments as clues, the lab studies various periods within the glacial–interglacial cycles.
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MembersFaculty
The members of the Paleoenvironmental Studies Lab consist of faculty, and PhD, master's, and undergraduate students.
- ProfessorYusuke Okazaki
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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: “PS sediment-core hg” Hannes Grobe (talk) / CC BY 3.0 (cropped)
- Past Climate Read from Seafloor Sediments: “Sediment-core PS2492-2 hg” Hannes Grobe/AWI / CC BY 3.0 (cropped)
- Related lab (Theoretical Cosmic Evolution Lab): “Protoplanetary disk HH-30” NASA / Public domain (cropped)
- Related lab (Observational Seismology and Volcanology Lab (Earthquake and Volcano Observation Research Center)): “Seismometer-iceland” Heidi Soosalu / CC BY-SA 3.0 (cropped)
- Related lab (Earth and Planetary Natural History Lab): “Uncoiled Lower Creataceous Ammonites from Northern Bulgaria (Coll. N. Dimitrova) at the Sofia University 'St. Kliment Ohridski' Museum of Paleontology and Historical Geology” Motekov / CC BY-SA 4.0 (cropped)
- Related lab (Earth System Chemistry Lab): “Pāhoehoe Lava flow” Brocken Inaglory / CC BY-SA 3.0 (cropped)
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