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Description of the data supporting:				
  'Global temperature homogenization can obliterate temporal isolation in migratory animals with potential loss of population structure' 				
   by Bom et al 2023 (Global Change Biology)				
				
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WHEN USING any of the data, PLEASE CITE the original paper 
				
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CONTENT				
1.  breeding_range.shp			
2.  overlap_areas.shp	  				
3.  snowmelt_breeding_range.csv
4.  siteTable.csv
				
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1.breeding_range.shp	
spatial data of bar-trailed godwit [(_Limosa lapponica taymyrensis_ & Limosa lapponica yamalensis)] breeding range from
Lappo, E. G., Tomkovich, P. S., & Syroechkovskiy, E. (2012). Atlas of breeding waders in the Russian Arctic. UF Ofsetnaya Pechat, Moscow, Russia. 

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2.  overlap_areas.shp	  				
spatial data of spring and summer overlap areas as presented in the manuscript for bar-trailed godwit [(_Limosa lapponica taymyrensis_ & Limosa lapponica yamalensis)] range from

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3.  snowmelt_breeding_range.csv
This file contains data on the snowmelt date across the breeding range of bar-trailed godwit Limosa lapponica taymyrensis_ & Limosa lapponica yamalensis  
downloaded from the NOAA Climate Data Record estimates of snow cover extend on a 24 × 24 km grid based on remote sensing data
U.S. National Ice Center. (2008). IMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km Resolutions, Version 1 [Data Set]. 
Boulder, Colorado USA. National Snow and Ice Data Center. https://doi.org/10.7265/N52R3PMC. Date Accessed 05-24-2023. NSIDC: National Snow and Ice Data Center Boulder, Colorado USA. 
	
	1. lat				midpoint latitude of the 24 × 24 km grid in decimal degrees
	2. lon				midpoint longitudeof the 24 × 24 km grid in decimal degrees
	3. year				year
	4. Julian day of snowmelt	Julian day of snowmelt
	5. subspecies			taymyrensis or yamalensis


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4.  siteTable.csv
This file contains information on the sites derived from the tracking data.

	1.  tag				tag id
	2.  subspecies			taymyrensis or yamalensis
	3.  arrivalTimestamp		estimated arrival time (CEST), format yyyy-mm-dd hh:mm:ss
	4.  departureTimestamp		estimated departure time (CEST), format yyyy-mm-dd hh:mm:ss
	5.  year			year of the arrival timestamp
	6.  lat				median latitude of all clustered Argos locations in decimal degrees 
	7.  long			median longitude of all clustered Argos locations in decimal degrees 
	8.  nObs			number of Argos locations in the cluster	
	9.  DayOfYear			Julian day of the arrival timestamp
	10. event			event
	11. distance_to_other		minimum distance to the other subspecies, used to derive overlap areas
	12. spring_overlap		whether the site is in the spring overlap area (1)
	13. summer_overlap		whether the site is in the summer overlap area (1)
	15. day of snowmelt		day of snowmelt at the breeding areas only