Vegetation Warming Experiment: 15N Uptake Experiment Environmental Observations and Thaw Depth, Utqiagvik (Barrow), Alaska, 2018 ...

• Main Authors: Salmon, Verity, Childs, Joanne, Iversen, Colleen, Spencer, Breann, Rogers, Alistair, Ely, Kim, Serbin, Shawn
• Format: Dataset
• Language: English
• Published: Next Generation Ecosystems Experiment - Arctic, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (US); NGEE Arctic, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States) 2020
• Subjects: 54 Environmental Sciences; ;Utqiagvik, Alaska;Barrow Environmental Observatory BEO, Alaska; Arctagrostis latifolia; Barrow; Tundra; Alaska
• Online Access: https://dx.doi.org/10.5440/1784757; https://www.osti.gov/servlets/purl/1784757/

This dataset consists of measured soil thaw depth, soil temperature, soil moisture, and Arctagrostis latifolia height in vegetation warming experiment enclosures and paired control plots.Vegetation warming chambers (Zero Power) were deployed on the Barrow Environmental Observatory (BEO), Utqia?vik, Alaska. These chambers (Figure 1) consistently elevated air temperatures by approximately 4°C using a self-venting system described by Lewin et al (2017). Five chambers were deployed from June 17, 2018 to September 24, 2018 on the BEO within a 1 km2 area centered on 71.275N, -156.641W. Each chamber was co-located with an ambient plot where temperatures were not manipulated on patches of tundra containing the target species Arctagrostis latifolia. An intensive field campaign in late July investigated the impact of warming had on A. latifolia biomass, chemistry, and uptake of 15N labeled ammonia that was injected into the surface soils for one week. Initial measurements were taken on July 21, 2018. Harvest occurred ...