Atsumu Ohmura (大村 篤睦, Ōmura Atsumu, born 1942) is a prominent Japanese climatologist and atmospheric scientist renowned for his seminal contributions to the study of the Earth's energy balance and global radiation budgets. He is particularly recognized for his role in establishing the Global Energy Balance Archive (GEBA), a foundational dataset for climate research, and for significantly advancing the understanding of the Earth's albedo and its crucial role in the climate system.
Early Life and Education
Details regarding Ohmura's early life and specific educational background are not widely published in readily accessible encyclopedic sources, but his scientific career flourished primarily in Europe.Key Contributions
Global Energy Balance Archive (GEBA)
Ohmura conceptualized and led the development of the Global Energy Balance Archive (GEBA), a comprehensive database that collects and synthesizes long-term measurements of various components of the Earth's surface energy balance from meteorological stations worldwide. These components include global solar radiation, reflected solar radiation, longwave radiation, latent heat flux, and sensible heat flux. GEBA has become an indispensable tool for:- Validating and improving climate models.
- Assessing long-term changes in the Earth's radiation budget.
- Understanding the spatial and temporal distribution of energy fluxes across different biomes.
Research on Earth's Albedo
A significant portion of Ohmura's research focused on the Earth's albedo, which is the fraction of incident solar radiation reflected back into space. His work highlighted:- The variability of surface albedo, particularly in snow and ice-covered regions (cryosphere), and its strong influence on regional and global temperatures.
- The feedback mechanisms between albedo changes (e.g., due to melting glaciers or land-use changes) and the warming or cooling of the planet.
- The importance of accurate albedo measurements for quantifying the Earth's net radiation budget and radiative forcing.
Earth's Energy Balance and Climate Change
Ohmura's broader work provided fundamental insights into the intricate dynamics of the Earth's energy budget. By meticulously analyzing observational data, he has contributed to a more robust quantification of how solar radiation is absorbed, reflected, and re-emitted by the Earth system. His analyses have been instrumental in:- Understanding the natural variability of climate.
- Detecting anthropogenic influences on the global energy balance.
- Informing scientific assessments of climate change.
Career and Affiliations
Atsumu Ohmura served as a professor at the Department of Environmental Sciences, Institute for Atmospheric and Climate Science, at the ETH Zurich (Swiss Federal Institute of Technology Zurich) in Switzerland. During his tenure, he led significant research initiatives and mentored numerous students and researchers who have gone on to contribute to climate science.Awards and Recognition
Throughout his career, Atsumu Ohmura's pioneering work has garnered international recognition within the atmospheric and climate science communities. His contributions have profoundly influenced subsequent research on climate dynamics, global energy budgets, and the monitoring of climate change.Selected Research Areas
Ohmura's extensive body of work is documented in numerous peer-reviewed scientific articles and reports. His research interests and publications span a wide array of topics, including:- Global solar radiation climatology
- Surface energy balance of the cryosphere
- Measurements and modeling of surface albedo
- Atmospheric radiation and radiative transfer
- Development of global climate observational networks
See Also
- Climate science
- Earth's energy budget
- Albedo
- Radiative forcing
- Climatology
- Cryosphere
References
- Scientific publications of Atsumu Ohmura
- Institutional profiles (e.g., ETH Zurich)
- Databases and archives related to climate research (e.g., GEBA)