Please see published work: DOI: 10.1111/jav.01712 for detailed methods.  Briefly, every time-lapse image was scored 0/1 with 0 indicating no snow fallen from previous image and 1 indicating new snow had fallen from previous image.  Most cameras took one image a day.  For cameras that took multiple images in one day, presence/ absence of snow was scored centered around noon (i.e. new snow present in a photo at 10:00 would be scored as new snow for the current day of year, whereas snow fallen at 14:00 would be counted as snow fallen for the subsequent day. 

Site in dataset refers to the physical location where birds were studied that these snow camera data were matched to.  Camera location in the dataset refers to the physical camera from which inferences about snowfall were made.  For more information about the cameras used in this project or to obtain original photographss, please consult the following resources:

For the following images, please consult Associated Researcher, Natalie Boelman listed in contacts above: Boelman IMVT snowcam, Boelman SDOT snowcam, Boelman Toolik Camera

For the following images, please consult the Toolik Environmental Data Center photographic library: Toolik EDC IMVT Creek Camera, Toolik EDC Atigun Ridge snowcam, Toolik EDC Brooks Range Camera, Toolik EDC Lake Camera

For all Kuparuk region images, please consult Linda Deegan (ldeegan@mbl.edu) associated researcher with the Arctic LTER.