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-We also have released very high resolution (0.05°) long-term (1900-) daily gridded dataset over Japan area (APHRO_JP). Please see the Products page.
Asian Precipitation - Highly-Resolved Observational Data Integration Towards Evaluation of the Water Resources
(APHRODITE's Water Resources)
The APHRODITE project develops state-of-the-art daily precipitation datasets with high-resolution grids (0.25-degree and 0.5-degree) for Asia. The datasets are created primarily with data obtained from a rain-gauge observation network. The status of data collection and the domains we use to create the daily grids are shown on the Products page.
APHRODITE's Water Resources project is being conducted by the Research Institute for Humanity and Nature (RIHN) and the Meteorological Research Institute of Japan Meteorological Agency (MRI/JMA). Our domestic members are listed here. We welcome various types of collaboration, particularly the collection of rain-gauge-observation data and feedback from grid data users.
Recent development of high-resolution climate models have allowed us to improve our understanding of the impacts of global warming on regional water resources throughout Asia. Statistical downscaling techniques definitely require a long-term observational data network, but the precipitation datasets necessary for verification of high-resolution models and for statistical downscaling methods have not yet been fully developed. Therefore, we are developing daily grid precipitation datasets for Asia in collaboration with climate modelers and field workers. The basic algorithm that we have adopted is presented in Xie et al. (2007, J. Hydrometeor., 8, 607-627). Our approach and more detailed objectives are shown on the Scope page.
News
2010.05
Japan Geoscience Union Meeting 2010 were held from May 23 to 28 in 2010 at Chiba. We hold the international session of "Development of precipitation products in geophysical studies (A-AS004)"[Link]
2009.09
The reference paper of the product V0902 is accepted by SOLA. When you cite this paper for your presentation etc., please refer the following.
Yatagai, A. O. Arakawa, K. Kamiguchi, H. Kawamoto, M. I. Nodzu and A. Hamada (2009): A 44-year daily gridded precipitation dataset for Asia based on a dense network of rain gauges, SOLA , 5, 137-140, doi:10.2151/sola.2009-035. [Link]
2009.06
Since we released our products (V0804) in May 2008, we have made continuous efforts to collect data and to improve quality control and the analysis method. We have been started releasing V0902 in order after in-house check.
The previous test version (V0902_pre) has been replaced with the 0.5 degree and 0.25 degree grid daily precipitation data for the period of 1961 - 2004 over Monsoon Asia (MA_V0902), over Middle East (ME_V0902) and over Russia (RU_0902).
Details of the difference from the previous versions are stated in "readme", and remaining problems "errata" is also reported on this web-site.
We welcome any feedbacks including our problems and your requests for future improvement.
2009.03
The APHRODITE project has been allowed a two-year extension till March 2011, as the result of our first three-year activity was highly valued. We thank you very much for your cooperation.
History
2010.07.29
V1003 released
2010.07.22
APHRO_JP released
2009.06.15
NetCDF files for V0902 added
2009.05.16
V0902 released
2009.03.31
V0902_pre released
2008.05.16
V0804 released
2007.07.01
site renewal
2006.05
release
APHRODITE's Water Resources project is supported by Environment Research & Technology Development Fund of the Ministry of the Environment, Japan. We appreciate the many international as well as Japanese collaborators, who are listed here.