CLIMATE SERVER

Note on the production of JRA55-do-v1.5

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General description

It has been reported that lots of tropical cyclones have wrong sign of rotation in the JRA-55 analysis, on which JRA55-do is based. JRA55-do has been inevitably affected.

• Summary of quality issues with JRA-55.
• Report on the erroneously represented tropical cyclones.

Since the JRA-55 team does not have a plan to re-run the reanalysis, the developer of JRA55-do is replacing the surface atmospheric fields around the erroneous tropical cyclones of JRA55-do with those from 20CRv3. There could be other choices, but our choice here is based on the consideration that a backward extension of the entire dataset may occur in the future utilizing 20CRv3. A report the merged dataset is presented for each erroneous tropical cyclone below. An OMIP-2 type experiment forced with this version using the MRI model indicates that the overall effect of this correction is very minor.

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Reference Manual

User guide of JRA55-do-v1.5 is available from here.

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Examples of corrected fields

Each problematic tropical cyclone, the corrected fields (sea level pressure and surface wind vector) around the problematic tropical cyclone are presented below for JRA55-v1.3 (same for v1.4), JRA55-v1.5, and 20CRv3. The erroneous analysis occurred around the central position of each figure in JRA55-do-v1.3. Dates/positions of erroneously represented tropical cyclones are listed in the following:

• 1959 in the Northeast Pacific
• 1967-1987 in the North Atlantic

In IDs for tropical cyclones, TCYYYY-##(E,L),

• "YYYY" represents the year.
• "##" represents the tropical cyclone number of that year.
• "E" represents the Pacific and "L" represents the Atlantic.

1959-10E   1967-01L   1967-02L   1967-03L   1967-04L   1967-05L   1967-06L   1967-07L   1967-08L   1967-09L   1967-10L   1967-15L   1967-16L   1967-17L   1967-20L   1967-22L   1967-23L   1967-24L   1967-26L   1968-13L   1969-14L   1970-06L   1971-02L   1971-03L   1971-05L   1971-07L   1971-10L   1971-15L   1971-20L   1972-04L   1972-07L   1973-11L   1973-13L   1973-17L   1974-03L   1974-05L   1974-08L   1974-16L   1975-05L   1975-06L   1975-11L   1975-16L   1975-18L   1975-20L   1975-21L   1976-16L   1976-19L   1977-01L   1977-02L   1977-09L   1977-15L   1978-02L   1978-07L   1978-14L   1978-18L   1979-01L   1979-10L   1979-17L   1979-19L   1980-01L   1980-02L   1981-04L   1981-05L   1981-07L   1981-08L   1981-12L   1981-17L   1984-01L   1984-02L   1984-09L   1984-17L   1986-04L   1986-07L   1987-08L   1987-09L  

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• Department of Atmosphere, Ocean, and Earth System Modelling Research and Department of Climate and Geochemistry Research
• Meteorological Research Institute
• Japan Meteorological Agency