The Mitsui & Co. Environment Fund

Introduction to Grant Projects

Department of Environmental Studies, Graduate School of Integrated Arts and Sciences, Hiroshima University Associate Professor Akio Tsuchiya

Changes regarding carbon dioxide in the southern portion of Amazonas, Brazil

Research grant

Project Description

We hear much of the less of tropical forests in the Amazon, and indeed the "deforestation arc" now extends from the southern periphery of the Amazon well into the north. Socioeconomic issues and approaches to them are domestic issues for the Brazilian government to address. When framed in terms of emissions, this shift from forest to farmland has direct and indirect effects, most notably a gasification of existing biomass, a suspension of annual carbon dioxide fixation, and a release of emissions from the soil to the atmosphere. In this research, we measure such phenomena so as to provide information for devising measures to brake them.

Preservation of surface soil and forests
Grant year
FY2008 Research Grants
Grant term
2 years
April 2009 - March 2011
Grant amount
4,100,000 yen
Activity region
Amazonas, Brazil
Logs for transport down the Amazon River

Overview of the Organization

Associate Professor Akio Tsuchiya
Associate Professor Akio Tsuchiya
Specialist fields
Biometeorology, climatology, physical geography
Affiliated academic societies
Japanese Society of Biometeorology; Association of Japanese Geographers
Environmental Research Center, University of Tsukuba; National Institute for Agro-Environmental Sciences; Laboratory of Tree-Ring Research, University of Arizona; School of Integrated Arts and Sciences: Graduate School of Biosphere Science, Hiroshima University; Ph.D. (science, University of Tsukuba)
WEB site
Collaborating researcher
INPA/UFAM/Senior Researcher/Professor/Niro Higuchi
Research record
Species diversity in natural and recreated Amazon forests; differences in conduit surface area ratios by species composition and biomass; differences in soil CO2 flux/surface heat balances in bare ground and in natural forest; transpiration stream and leaf-to-air vapor pressure differentials (VPD) in pioneer species; heat balance characteristics of flooded forests and dry land forests.