Editing Glacier Area Extent (section)

== Boundary Conditions ==
Boundary inclusions encompass all land-based glaciers globally, defined as perennial bodies of ice exhibiting evidence of flow and accumulation. Boundary exclusions omit ice sheets, such as those in Greenland and Antarctica, as well as seasonal snow cover and sea ice. The signal specifically excludes transient snowfields and frozen ground without glacier characteristics. Chemical stressors influencing glacier area, such as atmospheric deposition affecting ice albedo, are considered within the causal framework but do not alter spatial boundaries directly.