A5056556837- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Microbial Community Ecology and Physiology
- Marine and coastal ecosystems
- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Seismic Imaging and Inversion Techniques
- Atmospheric and Environmental Gas Dynamics
- Marine Bivalve and Aquaculture Studies
- Solar and Space Plasma Dynamics
- Hydrocarbon exploration and reservoir analysis
- Reservoir Engineering and Simulation Methods
- Climate variability and models
- Geomagnetism and Paleomagnetism Studies
- Atmospheric Ozone and Climate
- Ocean Acidification Effects and Responses
- Plant Water Relations and Carbon Dynamics
- Amino Acid Enzymes and Metabolism
- Cancer, Hypoxia, and Metabolism
- Tree-ring climate responses
- Astrophysics and Cosmic Phenomena
- Marine Toxins and Detection Methods
- Cassava research and cyanide
- Environmental DNA in Biodiversity Studies
- Epigenetics and DNA Methylation
Lake Biwa Museum
2017-2020
The University of Tokyo
2009-2018
Sphere Institute
2017
University of California, Santa Cruz
2017
Japan Agency for Marine-Earth Science and Technology
2009-2017
University of California System
2015
Scientific drilling at a submarine mud volcano shows that geofluid migration stimulates methanogenesis in the deep biosphere.
The Maunder Minimum (A.D. 1645–1715) is a useful period to investigate possible sun–climate linkages as sunspots became exceedingly rare and the characteristics of solar cycles were different from those today. Here, we report annual variations in oxygen isotopic composition ( δ 18 O) tree-ring cellulose central Japan during Minimum. We able explore connections through high-temporal resolution activity (radiocarbon contents; Δ 14 C) climate isotope records derived tree rings. O record shows...
Abstract We have examined the variation of carbon-14 content in annual tree rings, and investigated transitions characteristics Schwabe/Hale (11-year/22-year) solar cosmic-ray cycles during last 1200 years, focusing mainly on Maunder Spoerer minima early Medieval Maximum Period. It has been revealed that mean length changes associated with centennial-scale activity level. The Schwabe cycle had ~14 years Minimum, while it was ~9 also found climate proxy record shows cyclic variations similar...
Dissolved organic matter (DOM) plays crucial roles in the biogeochemical cycles aquatic environments.One of key questions this field is understanding origin recalcitrant DOM (RDOM).High abundance D-amino acid enantiomers (D-alanine, D-glutamic acids, D-aspartic and D-serine) have suggested that bacterially-sourced a major source ocean's RDOM pool (e.g., McCarthy et al. 1998, Science; Kaiser & Benner 2008, LO).At same time, recent GC-MS analysis acids oligotrophic open ocean identified...