在线计算器

Michell Humidity Calculator

通用常数

中文名称 英文名称 符号 单位 数值 备注 来源
通用常数

阿伏伽德罗常数 Avogadro's Number NA mol−1 6.02214129(27)×1023   Wikipedia
玻尔兹曼常数 Boltzmann's constant kB J·K−1·molecule−1 1.381×10−23 Petty 2006
k J·K−1 1.380 649 × 10−23 NIST 2018
真空磁导率 Magnetic premeability of free space μ0 N·A−2 1.257×10−6 Petty 2006
真空介电常数 Permittyvity of free space ε0 F·m−1 8.854×10−12 Petty 2006
普朗克常数 Planck's constant h J·s 6.626×10−34 Petty 2006
J Hz−1 6.626 070 15 × 10−34 NIST 2018
光速 Speed of light c m·s−1 2.998×108 Petty 2006
2.997 924 58 × 108 vacuum NIST 2018
史蒂芬—玻尔兹曼常数 Stefan-Boltzmann constant σ W·m−2·K−4 5.670×10−8 Petty 2006
5.670 374 419 × 10−8 NIST 2018
维恩常数 Wien's constant kW μm·K 2897 Petty 2006
Wien wavelength displacement law constant b m K 2.897 771 955 × 10−3 NIST 2018
第一辐射常数（辐射强度） first radiation constant for spectral radiance c1L W m2 sr−1 1.191 042 972 × 10−16 NIST 2018
第一辐射常数 first radiation constant c1 W m2 3.741 771 852 × 10−16 NIST 2018
第二辐射常数 second radiation constant c2 m K 1.438 776 877 × 10−2 NIST 2018
天文常数
日地平均距离 Mean distance, sun to earth Ds km 1.496×108 Petty 2006
黄赤交角 Obliquity of the Ecliptic ε ° 23.43927944 Wikipedia
地月平均距离 Mean distance, earth to moon Dm km 3.84×105 Petty 2006
地球平均半径 Mean radius of the earth RE km 6373 Petty 2006
月球平均半径 Mean radius of the moon Rm km 1740 Petty 2006
太阳色球平均半径 Mean radius of the sun's photosphere Rs km 6.96×105 Petty 2006
太阳常数 Mean solar flux at TOA S0 W·m−2 1370 Petty 2006
Solar constant 1360.8 Wikipedia
Earth's observed global mean surface air temperature K 287.6 Volokin 2014
288 Wikipedia
jmerck
Wikipedia
重力加速度 Gravitational acceleration g m·s−2 9.81 Petty 2006
standard acceleration of gravity 9.80665 NIST 2018
地球（地气系统）有效温度 effective temperature of the Earth K 252 wikipedia
K 255 Stull 2017
Volokin 2014
jmerck
Wikipedia
K 254.33 Türkay 2014
太阳有效温度 effective temperature of the Sun K 5780 wikipedia
Stull 2017
5777 Wikipedia
空气和水
普适气体常数 (Molar, Universal, or Ideal) Gas constant R J·mol−1·K−1 8.314 462 618 153 24   Wikipedia
molar gas constant R J·mol−1·K−1 8.314 462 618 NIST 2018
干空气比气体常数 Specific gas constant for day air Rd J·kg−1·K−1 287.052874   Wikipedia
干空气摩尔质量 Molar mass of dry air Md g·mol−1 28.9654 Wikipedia
水汽比气体常数 Specific gas constant for water vapor Rv J·kg−1·K−1 461.495   Wikipedia
水的凝结潜热 Specific latent heat for condensation of water Lv J·kg−1 2.5008×106 0 °C Miller 2015
水的冻结潜热 Specific latent heat for deposition of water Lf J·kg−1 0.3337×106 0 °C Miller 2015
ΔfusH J·g−1 333.4 0 °C Haynes, et al., 2017
干空气定压比热 Specific heat of a dry air at constant pressure Cp J·kg−1·K−1 1003.8   Miller 2015
干空气定容比热 Specific heat of dry air at constant volume Cv J·kg−1·K−1 717.0   Miller 2015
水汽定压比热 Specific heat of water vapor at constant pressure Cpv J·kg−1·K−1 1844.8   Miller 2015
水汽定容比热 Specific heat of water vapor at constant volume Cvv J·kg−1·K−1 1383.6   Miller 2015
纯液水表面张力 Surface tension of pure water σ mN·m−1 75.64 0 °C Wikipedia
水的摩尔质量 Molar mass of water MH2O g·mol−1 18.01528(33)   Wikipedia
饱和水汽压 Saturated water vapor pressure E hPa 6.107788861 0 °C Lowe 1977
平均海平面气压 Average sea level pressure p0 hPa 1013.25
标准状态气压 standard-state pressure hPa 1000 NIST 2018
其他
NaCl的摩尔质量 Molar mass of sodium chloride MNaCl g·mol−1 58.44   Wikipedia

Haynes, W. M., D. R. Lide, and T. J. Bruno, 2017: CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data. 97th ed.

Lowe, P. R., 1977: An Approximating Polynomial for the Computation of Saturation Vapor Pressure. Journal of Applied Meteorology, 16, 100-103.

Miller, S., 2015: Applied thermodynamics for meteorologists. Cambridge University Press, 392 pp.

Petty, G. W., 2006: A first course in atmospheric radiation. 2nd ed. Sundog Publishing, 459 pp.

NIST, 2018: CODATA Internationally recommended 2018 values of the Fundamental Physical Constants. [Available online at https://physics.nist.gov/cuu/Constants/.]

最后修改: 2023年09月3日 星期日 18:30