Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Author name: Kristina Kiest

Tundra Greenness

Vegetation in the Arctic tundra has been responding dynamically over the course of the last several decades to environmental changes, many of which are anthropogenically-induced. These vegetation changes throughout the circumpolar Arctic are not spatially homogeneous, nor are they temporally consistent (e.g. Bhatt et al. 2013), suggesting that there are complex interactions among atmosphere, ground (soils and permafrost), vegetation, and herbivore components of the Arctic system. Changes in Arctic tundra vegetation may have a relatively small impact on the global carbon budget through photosynthetic uptake of CO2, compared to changes in other carbon cycling processes (Abbott et al. 2016). However, tundra vegetation can have important effects on permafrost, hydrological dynamics, soil carbon fluxes, and the surface energy balance (e.g. Blok et el. 2010, Myers-Smith and Hik 2013, Parker et al. 2015). Tundra vegetation dynamics also control the diversity of herbivores (birds and mammals) in the Arctic, with species richness being positively related to vegetation productivity (Barrio et al. 2016). To improve our understanding of these complex interactions and their impacts on the Arctic and global systems, we continue to evaluate the state of the circumpolar Arctic vegetation.

Tundra Greenness Read More »

Fig. 1.3. Geopotential height (700 mb) anomalies from November 2014 to June 2015 over western North America and the eastern Pacific Ocean.

Surface Air Temperature

Arctic air temperatures are both an indicator and a driver of regional and global changes. Although there are year-to-year and regional differences in air temperatures due to natural random variability, the magnitude and Arctic-wide character of the long-term temperature increase is a major indicator of global warming (Overland 2009). Here we report on the spatial and temporal variability of Arctic air temperatures during the period October 2014 through September 2015, the 12-month period since the end of the previous reporting period (Overland et al. 2014).

Surface Air Temperature Read More »

Arctic Science Journeys Radio Stories

Arctic Science Journeys Radio (ASJ) was a free service that offered interesting stories about science, culture, and the environment of the far north. Production of these radio stories has been suspended indefinitely, but we hope you enjoy our archives, offered here. ASJ stories posted here began to include audio files starting in 1998, and a few stories include short video clips.

Arctic Science Journeys Radio Stories Read More »

Why is the Arctic So Sensitive to Climate Change and Why Do We Care?

That the Arctic should be especially sensitive to climate change was recognized in the 19th century. The primary reason for this sensitivity is that an initial warming (or cooling) sets in motion a chain of events that amplify the warming or cooling. This chain of events is known as the albedo feedback. Albedo is a measure of how white, or reflective, a surface is.

Why is the Arctic So Sensitive to Climate Change and Why Do We Care? Read More »

Scroll to Top

Contact Our Team

Fill out the form below, and we will be in touch shortly.
Contact Information
Vehicle Information
Preferred Date and Time Selection