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This activity enabled those climate models, outside the major modeling centers to perform research of relevance to climate scientists preparing the IPCC Fourth Assessment Report (IPCC-AR4). For the CMIP3 a list of 20 different experiments were proposed, [ 3 ] and the PCMDI kept the documentation of all the global climate model involved. [ 4 ]
The E–OBS daily gridded dataset is a European land-only, high-resolution gridded observational dataset produced using the ECA&D blended daily station data. The dataset covers the area 25–75N x 40W–75E and comes in two grid flavours with two resolutions: a 0.22° and 0.44° rotated grid (North Pole at 39.25N, 162W) and a 0.25° and 0.50 ...
The standard measuring conditions for temperature are in the air, 1.25 metres (4.1 ft) to 2.00 metres (6.6 ft) above the ground, [5] and shielded from direct sunlight intensity (hence the term x degrees "in the shade"). [6]
For instance, the NWS might describe a precipitation forecast with terms such as "slight chance" meaning 20% certainty and "scattered" meaning 30–50% areal coverage. [10] The precise meaning of these terms varies. [11] The UK's Met Office replaced descriptive terms, such as "likely", with percentage chance of precipitation in November 2011. [12]
An atmospheric reanalysis (also: meteorological reanalysis and climate reanalysis) is a meteorological and climate data assimilation project which aims to assimilate historical atmospheric observational data spanning an extended period, using a single consistent assimilation (or "analysis") scheme throughout.
However, understanding tropical precipitation is important for weather and climate prediction, as this precipitation contains three-fourths of the energy that drives atmospheric wind circulation. [3] Prior to TRMM, the distribution of rainfall worldwide was known to only a 50% of certainty. [4] The concept for TRMM was first proposed in 1984.
In areas where imperial units are used (primarily the United States), liquid precipitation (rain and drizzle) is measured in intervals of 0.01 inches (0.25 mm), while snow, ice pellets, and most other precipitation types are measured in intervals of 0.1 inches (2.5 mm). [1]
Rainfall character is decided by the total amount of rain that has fallen in a set period (usually 1 hour) by counting the number of pulses during that period. Algorithms may be applied to the data as a method of correcting the data for high-intensity rainfall. Tipping bucket rain gauge recorder Closeup of a tipping bucket rain gauge recorder chart