英语词汇“penman equation”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

attributive and in the genitive. Designating a formula for or an estimate of the rate of evapotranspiration from land covered with vegetation, under given environmental and meteorological conditions; esp. in Penman equation, Penman formula.

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the world > matter > gas > becoming or making into gas > [noun] > becoming or making into vapour > evaporation > formula for rate of evaporation

Penman equation1952

1952 Austral. Jrnl. Sci. Res. A. 5 328 An objection which holds..against Penman's derivation, is the neglect of the difference between water and air temperature in determining the radiation loss from the pond.

1954 R. T. Pearl et al. Calculation of Irrigation Need (Min. of Agric. Techn. Bull. No. 4) 14 All the weather data required in Penman's formulae are recorded on the actual site.., and the full calculations made and applied at 7–30 day intervals according to Penman's formula.

1976 Physics Bull. Dec. 548/3 The ‘Penman equation’ and its derivatives are now applied routinely throughout the world to estimate the irrigation needed for crops.

1982 R. G. Barry & R. J. Chorley Atmosphere, Weather & Climate (ed. 4) ii. 60 The annual evaporation over Britain, calculated by Penman's formula, ranges from about 38 cm..in Scotland to about 50 cm..in parts of south and south-east England.

1990 Forestry 63 52 In order to use it to predict runoff after clearfelling, the E_t (Penman estimate of annual potential evapotranspiration) value used for the forested fraction would have to be estimated knowing the ground conditions at the site.

1999 Functional Ecol. 13 463/2 Penman potential evapotranspiration (PET) was computed from these data, assuming a linear relationship between net and global radiation..and using the conventional Penman formula.

单词	penman equation
释义	> as lemmas Penman equation attributive and in the genitive. Designating a formula for or an estimate of the rate of evapotranspiration from land covered with vegetation, under given environmental and meteorological conditions; esp. in Penman equation, Penman formula. ΘΚΠ the world > matter > gas > becoming or making into gas > [noun] > becoming or making into vapour > evaporation > formula for rate of evaporation Penman equation1952 1952 Austral. Jrnl. Sci. Res. A. 5 328 An objection which holds..against Penman's derivation, is the neglect of the difference between water and air temperature in determining the radiation loss from the pond. 1954 R. T. Pearl et al. Calculation of Irrigation Need (Min. of Agric. Techn. Bull. No. 4) 14 All the weather data required in Penman's formulae are recorded on the actual site.., and the full calculations made and applied at 7–30 day intervals according to Penman's formula. 1976 Physics Bull. Dec. 548/3 The ‘Penman equation’ and its derivatives are now applied routinely throughout the world to estimate the irrigation needed for crops. 1982 R. G. Barry & R. J. Chorley Atmosphere, Weather & Climate (ed. 4) ii. 60 The annual evaporation over Britain, calculated by Penman's formula, ranges from about 38 cm..in Scotland to about 50 cm..in parts of south and south-east England. 1990 Forestry 63 52 In order to use it to predict runoff after clearfelling, the E_t (Penman estimate of annual potential evapotranspiration) value used for the forested fraction would have to be estimated knowing the ground conditions at the site. 1999 Functional Ecol. 13 463/2 Penman potential evapotranspiration (PET) was computed from these data, assuming a linear relationship between net and global radiation..and using the conventional Penman formula. extracted from Penmann.² < as lemmas
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