ABoVE: Dall Sheep Lamb Recruitment and Climate Data, Alaska and NW Canada, 2000-2015

This dataset contains estimated annual average Dall sheep (Ovis dalli dalli) lamb-to-ewe ratios for each year from 2000-2015 across the full species range in Alaska and Northwestern Canada. Sheep population data are from surveys conducted over the 14 major mountain ranges encompassing the range of Dall sheep. For this study, the mountain ranges were divided into 24 mountain units due to differing climate gradients. Estimated covariate environmental and climate data used to examine the relationship between environmental conditions and Dall sheep population performance (per mountain unit) are also provided and include precipitation, temperature, snow cover, elevation, and distance to the center of the range.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated June 23, 2026, 01:40 (UTC)
Created April 1, 2025, 14:06 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 5622e0bc-6c58-4cb9-97c8-05e9c0328ce4
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/1640
license https://www.usa.gov/government-works
modified 2026-06-15T22:16:01Z
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 41773a7390629e9b3c869ff4c1272d978bdaa0a146dd697be04d90d8b672cc9c
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -163.281, "NorthBoundingCoordinate": 69.7074, "EastBoundingCoordinate": -123.547, "SouthBoundingCoordinate": 59.5978}]]
temporal 2000-01-01/2015-12-31
theme {"Earth Science"}