Catalog of basic meteorological data and products for sharing

Based on a principle of gradual opening, CMA will regularly update the catalog of basic meteorological data and products for sharing.

  • Hourly data are from national surface stations in China, including hourly observational values of such weather elements as temperature, pressure, relative humidity, moisture pressure, wind and precipitation.


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  • The dataset is derived from nationwide digitalized CLIMAT files from various provincial meteorological bureaus through statistic compilations, based on the Climate Data Statistic Compilation Method (1981-2010) (distributed version). This dataset covers the data from basic, reference and ordinary surface meteorological stations in China in 1981-2010, and it includes the daily values of climate normals of such weather elements as pressure, temperature, precipitation amount and wind.


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  • The dataset is derived from nationwide digitalized CLIMAT files from various provincial meteorological bureaus through statistic compilations, based on the Climate Data Statistic Compilation Method (1981-2010) (distributed version). This dataset covers the data from basic, reference and ordinary surface meteorological stations in China in 1981-2010, and it includes the daily data of climate normals of such weather elements as pressure, temperature, precipitation and wind.


    Share Level:Real-name Reg. Individual User access
  • The dataset is derived from nationwide digitalized CLIMAT files from various provincial meteorological bureaus through statistic compilations, based on Climate Data Statistic Compilation Method (1981-2010) (distributed version). This dataset covers the data from basic, reference and ordinary surface meteorological stations in China in 1981-2010, and it includes the daily data of climate normals of such weather elements as pressure, temperature, precipitation and wind.


    Share Level:Real-name Reg. Individual User access
  • The dataset is derived from nationwide digitalized CLIMAT files from various provincial meteorological bureaus through statistic compilations, based on the Climate Data Statistic Compilation Method (1981-2010) (distributed version). This dataset covers the data from basic, reference and ordinary surface meteorological stations in China in 1981-2010, and it includes the daily data of climate normals of such weather elements as pressure, temperature, precipitation and wind.


    Share Level:Real-name Reg. Individual User access
  • The dataset is derived from nationwide digitalized CLIMAT files from various provincial meteorological bureaus through statistic compilations, based on the Climate Data Statistic Compilation Method (1981-2010) (distributed version). This dataset covers the data from basic, reference and ordinary surface meteorological stations in China in 1981-2010, and it includes the daily data of climate normals of such weather elements as pressure, temperature, precipitation and wind.


    Share Level:Real-name Reg. Individual User access
  • T639L60 global medium range NWP model products have higher resolutions, its global horizontal resolution reaches 30 km, its vertical resolution is 60 layers, and its model top reaches 0.1 hPa. The maximum time validity of prediction is up to 240 hours, and the predicted elements include pressure, geopotential height, temperature, pseudo-adiabatic potential temperature/pseudo-equivalent potential temperature, dew point temperature, dew point deficit (or deficit value), u component of wind, v component of wind, vertical velocity (pressure), relative vorticity, relative divergence, specific humidity, relative humidity, evaporation amount, snow depth, water runoff, snowmelt amount, precipitation amounts, divergence of water vapor flux, water vapor flux, vertical component of moist potential vorticity, horizontal component of moist potential vorticity, liquid content of surface water storage pool, temperature advection, vorticity advection, etc. The data files adopt grib2 format, which are disseminated on a daily basis at 00:00 and 12:00 UTC.


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  • The model prediction products for the East Asia region are generated from the operational GRAPES_Meso regional ensemble prediction system. The spatial resolution of the model products is 10km, and the temporal resolution is 3 hours. The time validity of the prediction is up to 72 hours, and predicted elements include pressure, geopotential height, temperature, pseudo-adiabatic potential temperature/pseudo-equivalent potential temperature, dew point deficit (or deficit value), u component of wind, v component of wind, vertical velocity (geometric), relative humidity, precipitation amounts, moisture flux, divergence of moisture flux, etc.. The data files adopt grib2 format, which are disseminated on a daily basis at 00:00 and 12:00 UTC.


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  • The data include such observational data as geopotential height, temperature, dew point temperature, wind direction, wind speed at all specific isobaric levels and pressure-temperature-humidity layers from 89 upper air stations in China acquired by the CMA National Meteorological Information Centre (NMIC) through the domestic telecommunication system, and those from foreign upper air stations via GTS.


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  • The basic reflectivity products are the basic radar detection values in unit of Dbz, and each pixel of radar imagery represents the total back-scattering energy of cloud-droplet objects within a 1km*1°beam volume.


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  • The vertically accumulated liquid water content represents the equivalent liquid water value converted from reflectivity factor, assuming that the reflectivity factor is caused by liquid water in objects, and it is derived from empirical relationship.


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  • 1-hour accumulated precipitation product adopts hourly accumulation when each volume scan is completed, i.e. the precipitation rates in every 2km*1°sample bank are accumulated in a time sequence after each volume scan in order to get an hourly precipitation amount, and they are output by the end of each volume scan. It requires 54-minute continuous volume scanned data at least to generate a product (an interval of volume scans is less than 30 minutes).


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  • The data include such observational data as geopotential height, temperature, dew point temperature, wind direction, wind speed of all specific isobaric levels and pressure-temperature-humidity layers at the synoptic hours (00:00 and 12:00 UTC) from the upper air stations in China acquired by the CMA National Meteorological Information Centre (NMIC) through the domestic telecommunication system, and those from foreign upper air stations via GTS.


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  • Composite reflectivity factor is a product in which the largest reflectivity factor detected from constant elevation-azimuth scans within a volume scan has been projected onto a Cartesian grid point.


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