Is anybody aware of a formula which allows conversion from w/m2 to mm/hr or
order to work out evapotranspiration? AFAIK there are a couple of weather
instruments out there which will convert this based on several criteria i.e
temp, wind speed, humidity and solar radiation using the Penman-Monteith
equation, however I can already obtain the ETo data in terms of w/m2 but
just need to convert it to mm/hr.... any ideas?

Thanks in advance,

Andrew

"Andrew Bond" wrote in message ...
Is anybody aware of a formula which allows conversion from w/m2 to mm/hr or
order to work out evapotranspiration? AFAIK there are a couple of weather
instruments out there which will convert this based on several criteria i.e
temp, wind speed, humidity and solar radiation using the Penman-Monteith
equation, however I can already obtain the ETo data in terms of w/m2 but
just need to convert it to mm/hr.... any ideas?

Thanks in advance,

Andrew

Is this of any use Andrew.
http://www.fao.org/docrep/X0490E/x0490e04.htm

Regards,

Rob
Chester, UK
http://www.west-cheshire.ac.uk/weather/

"Rob Bale" wrote in message
...
"Andrew Bond" wrote in message
Is this of any use Andrew.
http://www.fao.org/docrep/X0490E/x0490e04.htm

Hi Rob,

That is 100% perfect, many thanks for that link :-)

Cheers,

Andrew