I'm looking to download photoperiod (day length) data for a variety of locations in Europe on a variety of dates. For each date and locations, I need to the number of hours of daylight.
Ideally, the data would have the following attributes:
- High spatial resolution
- Photoperiod of each day of year
- Downloadable as a comma separated values file or similar (to be used in R)
The data should look like this (commas separate each column):
location 1, date 1, photoperiod of 6hrs location 1, date 2, photoperiod of 7hrs location 2, date 1, photoperiod of 5hrs
Can anyone suggest where I might find these data?