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Yokozawa Lab
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A lab that uses models to take on the complexity of ecosystems and farmland.
AboutAbout the lab
Tackling the complexity of ecosystems with models.
The Yokozawa Lab studies how ecosystems and farmland function, representing them with computational models.
Using mathematical equations and observational data, the lab builds models of how plants grow in forests and grasslands and how biogeochemical cycles proceed.
It also studies how climate change affects crop yields and the global trade in food.
The lab also works on evaluating the risks of weather-related disasters, such as flooding from heavy rain, and how to prepare for them.
Key terms
- Modeling
- Representing the mechanisms of nature with mathematical equations in order to reproduce them or predict what will happen through calculation
- Biogeochemical cycles
- The flows by which elements such as carbon and nitrogen circulate between living organisms and the atmosphere and soil
- Data assimilation
- A method of incorporating observed values into a model to bring the calculated results closer to reality
NewsLab news
View More ↗ResearchResearch themes
Focusing on natural ecosystems and cultivated land, the lab uses modeling and data assimilation to clarify how they respond to environmental change. The work covers a wide range of scales, from plant growth to the global food trade and weather-related disasters.
*Illustrative imageEcosystem modeling
Trees in a forest vary in size and in where they grow. The lab reduces this variation to a simple form and builds models that calculate how ecosystems respond to environmental change.
*Illustrative imageClimate change and food production
The lab combines climate projections with crop models to estimate future fluctuations in yields. It also analyzes how food prices move when poor harvests coincide across countries around the world.
*Illustrative imageRisks of weather-related disasters and preparedness
The lab statistically analyzes records of past precipitation and flood damage, and models the relationship between how rain falls and the damage it causes. It also evaluates the process by which people adopt measures to prepare for floods.
MembersFaculty
- Masayuki Yokozawa
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: “Valabu village farmlands aerial view 03” Saiphani02 / CC BY-SA 4.0 (cropped)
- Ecosystem modeling: “Epping Forest High Beach Waltham Abbey Essex England - oak tree trunks 1” Acabashi / CC BY-SA 4.0 (cropped)
- Climate change and food production: “Ripe wheat ears” Jazzmaster1997 / CC BY 4.0 (cropped)
- Risks of weather-related disasters and preparedness: “Flooded town Limpopo River” Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994 / Public domain (cropped)
- Related lab (古山宣洋研究室): “Female Bunraku puppet Japan, early 20th century” Hiart / CC0 (cropped)
- Related lab (太田研究室): “Seawifs global biosphere” Provided by the SeaWiFS Project, Goddard Space Flight Center and ORBIMAGE / Public domain (cropped)
- Related lab (風間研究室): “Black-tailed gull” Bamse / CC BY-SA 3.0 (cropped)
- Related lab (赤沼研究室): “Hot spring & thermophiles, Upper Geyser Basin ( )” Yellowstone National Park / Public domain (cropped)
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