Fórmulas para Agrometeorologia

$R_o=S_c.D_r.COS\Theta MJ.m^{-2}min^{-1}$

$S_c=1,496.10^8$km

$D_r=0,086$ Constante

$Hn=arcos[-tan\varPhi.tan\delta]$ Horas

$\varPhi=$ latitude em graus

$\delta=23,45.sen[(\frac{360}{365}).(NDA-80)] Admensional$

NDA = Número de Dias do Ano.

$N=2.\frac{hn}{15}$

Alvorada (Hora) = $12-\frac{N}{2}$

Ocaso (Hora) = $12+\frac{N}{2}$

k=0,0248 a 289 kelvin;

$H_c=k.\frac{\Delta T}{\Delta z}w.m^{-2}$

$N=\frac{2.H_n}{15}Horas$

Nascer e Por do Sol $N=12\pm \frac{H}{2}Horas$

$R_g=R_o.[a+(b.\frac{n}{N})]MJ.m^{-2}dia^{-1}$

Dias Claros $R_g=R_o.[a+(b)]MJ.m^{-2}dia^{-1}$

$Rg=R_o.(0,75+2.10^{-5}.A)MJ.m^{-2}dia^{-1}$

a=0,20;

b=0,15;

$S_c=0,082 MJm^2min^{-1}$;

$D_r=1,496.10^{8}Km$;

$R_o=S_c.D_r.COS\Theta$ $MJ.m^{-2}min^{-1}$

$Hn=arcos[-tan\varPhi.tan\delta]$ Horas

$\varPhi=$ latitude em graus

$\delta=23,45.sen[(\frac{360}{365}).(NDA-80)] Admensional$

k=0,0248 a 289 kelvin;

$H_c=-k.\frac{\Delta T}{\Delta z}$ $w.m^{-2}$

$N=\frac{2.H_n}{15}Horas$

$S_c=0,082$ $MJm^2min^{-1};$

$D_r=1,496.10^{8}$ $Km$;

$arcos=cos^{-1}$