Comparison of Tropical Rainfall between the Observed GPCP Data and the Assimilation Products of ECMWF, NCEP/NCAR, and NASA-GEOS-1
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- Lim Hyo-Suk
- Korea Aerospace Research Institute
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- Ho Chang-Hoi
- School of Earth and Environmental Sciences, Seoul National University
Bibliographic Information
- Other Title
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- 熱帯域の降水量におけるGPCPデータとECMWF、NCEP/NCAR、NASA-GEOS-1客観解析値との比較
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Abstract
Combined tropical precipitation of Global Precipitation Climatology Project (GPCP) version 1 is compared with the assimilated precipitation obtained from the European Center for Medium-Range Weather Forecast (ECMWF), the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR), and the NASA Goddard Earth Observing System (GEOS-1) reanalysis projects. The analysis focuses on the domain within 30°S-30°N, and the period is from July 1987 to December 1993. Annual-mean precipitation shows that the ECMWF overestimates the precipitation over tropical oceans as compared to the GPCP. On the other hand, the NCEP/NCAR and NASA-GEOS-1 underestimate precipitation of the Inter-Tropical Convergence Zone (ITCZ) and South Pacific Convergence Zone (SPCZ). Horizontal distributions of the difference in intra-annual and inter-annual precipitation variations between the GPCP and the three reanalysis datasets are similar to those of the difference in annual-mean precipitation. Overall, the ECMWF exhibits the highest standard deviation of precipitation over tropical oceans, followed by the GPCP, NASA-GEOS-1, and NCEP/NCAR. The correlation features of the area-averaged precipitation with the sea surface temperatures over the eastern equatorial Pacific Ocean are also compared among the four products, and their differences are discussed.
Journal
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- Journal of the Meteorological Society of Japan. Ser. II
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Journal of the Meteorological Society of Japan. Ser. II 78 (5), 661-672, 2000
Meteorological Society of Japan
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Details 詳細情報について
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- CRID
- 1390001206507138048
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- NII Article ID
- 110001807633
- 130007347291
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- NII Book ID
- AN00317933
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- ISSN
- 21869057
- 00261165
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- NDL BIB ID
- 5534262
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- Data Source
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- JaLC
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
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- Abstract License Flag
- Disallowed