Spruce Leaf, Tree Traits, and Respiration at Range Extremes, AK and NY, USA, 2018

This dataset provides in situ measurements of needle-level gas-exchange and leaf traits from Picea glauca (white spruce) from a field site located in the northern latitudinal forest-tundra ecotone (FTE) near the Dalton Highway in northern Alaska, and from one study site located in Black Rock Forest, New York, USA. Measurements were collected with an open flow portable photosynthesis system (Li6400XT) and custom-built temperature-controlled cuvette. Respiration as a function of leaf temperature was measured continuously as the needle temperature was ramped from approximately 5 to 65 degrees C, at a constant rate of 1 degree C per minute. Additional data include tree diameter at breast height (dbh), leaf area, photosynthetic rate, intercellular C02, conductance to H20, tree height, and data from raw temperature curves. Results are reported on both a leaf area and leaf mass basis. The data are for the period 2018-06-06 to 2018-06-23 and are provided in comma-separated (CSV) format.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated June 3, 2026, 01:43 (UTC)
Created April 1, 2025, 19:14 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 6f62ffa7-c7cc-4c8b-8f0a-b97e0363ea5c
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/1948
license https://www.usa.gov/government-works
modified 2026-06-01T22:16:02Z
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 0a5365d5cc94d3e143e8f0d8fb584381de54790ae6c3589ca023742f239a782c
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -149.955, "NorthBoundingCoordinate": 67.8889, "EastBoundingCoordinate": -74.0246, "SouthBoundingCoordinate": 41.4011}]]
temporal 2018-06-06/2018-06-23
theme {"Earth Science"}