Spatial and Temporal Characteristic Analysis and Risk Assessment of Global Highly Pathogenic Avian Influenza H5N8 Subtype

Table 1

Variables used in the model.

Variable classification	Variable code	Variable name	Source
Bioclimatic	bio1	Annual mean temperature	WorldClim version 2.1
	bio12	Annual precipitation	WorldClim version 2.1
	Wind	Wind speed	WorldClim version 2.1
Geographic landscape	Elevation	Elevation	WorldClim version 2.1
	Land cover	Land cover	Esri
Anthropogenic	People	People density	LandScan
	Chicken	Chicken density	FAO livestock system
	Duck	Duck density	FAO livestock system
	Road	Road density	Resource and Environment Science and Data Platform