accumulated temperature

accumulated temperature

[ə′kyü·myə‚lād·əd ′tem·prə·chər]
(meteorology)
A value based on the integrated product of the number of degrees that air temperature rises above a given threshold value and the number of days in the period during which this excess is maintained.
References in periodicals archive ?
According to the second expression form of the law of effective accumulated temperature: T = C + KV (Eq.
Studies on bionomics and effective accumulated temperature of Eotetranychus populi (Koch) (Acariformes: Tetranychidae).
Developmental threshold temperature ([degrees]C) and effective accumulated temperature (degree-d) for Oligonychus litchi at different temperatures.
In general the current model construction idea was derived from the accumulated temperature and physiological development time method.
Accumulated temperature (growing degree days, GDD) is related to crop growth and development in cereals and grasses (Moore and Moser, 1995; Mitchell et al., 1997) and to the interval between appearance of successive leaves (phyllochron) in wheat (Triticure aestivum L.), barley (Hordeum vulgare L.), and forage grasses (Cao and Moss, 1989; Frank and Bauer, 1995; Kirby, 1995; Skinner and Nelson, 1995).
Leaf appearance response to accumulated temperature for each species in each temperature regime was calculated by linear regression of the mean cumulative number of visible leaves for each group of five seedlings using post-emergence accumulated temperature above a base of 0[degrees]C as the independent variable.
Measures on five replicate plants were used to calculate the mean rate of leaf extension (mm GD[D.sup.-1]) over a period of 70 GDD following appearance of each measured leaf by regression of lamina length against accumulated temperature (GDD).
Development threshold temperature (mean [+ or -] SE) (a) and effective accumulated temperature (mean degree-days [+ or -] SE) (a) of Tirathaba rufivena.
The development threshold temperatures (C) and effective accumulated temperatures (K) were calculated from the following formulae (Arbab et al.
Minimum threshold and effective accumulated temperatures can provide useful information for forecasting potential occurrence and distribution of insects (Zhou et al.
Caption: FIGURE 3--Correlations (R) between number of hours of accumulated temperatures (NH) and date of full blooming of peach variety S139.
Caption: FIGURE 4--Correlations (R) between number of hours of accumulated temperatures (NH) and date of full blooming of Mondardo peach variety.

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