Media Category: ARC

Figure 4.  The Arctic is warming twice as fast as the rest of the planet. 

Figure 3. Soil waters had to be filtered in a oxygen-free glove bag back in the lab at Toolik Field Station to avoid oxidation of reduced iron before the start of experiments.

Researchers at Toolik Lake

Figure 1. Red-orange oxidized iron precipitates across the arctic landscapes.

Climate models of changes in ecosystem carbon and nitrogen with increases in temperature. Black, dotted line represents a model where vole effects are “Aggregated” with other biogeochemical processes. Red dashed line represents a model with constant vole density (100 voles per hectare). Blue solid line represents a model with a simulated “Vole cycle,” in which vole abundance fluctuates with peaks every 3-4 years based on demographic patterns observed in wild populations. When voles aren’t explicitly accounted for (aggregated, dotted black line), the model underestimates shifts in carbon and nitrogen stocks.

Streams LTER Research Assistant Frances Iannucci (a coauthor on the study) recording dissolved oxygen in a watershed associated with the Arctic LTER. Credit: Jay Zarnetske

Arial Shogren

Site Lightning Talk from the 2020 Science Council Online meeting, for the Arctic LTER.