Frost, G. V., U. S. Bhatt, H. E. Epstein, D. A. Walker, M. K. Raynolds, L. T. Berner, J. W. Bjerke, A. L. Breen, B. C. Forbes, S. J. Goetz, C. M. Iversen, M. J. Lara, M. J. Macander, G. K. Phoenix, A. V. Rocha, V. G. Salmon, P. E. Thornton, H. Tømmervik, and S. D. Wullschleger. 2019. Tundra greenness. Arctic Report Card 2019, J. Richter-Menge, M. L. Druckenmiller, and M. Jeffries (eds.). http://www.arctic.noaa.gov/Report-Card.
Tundra Greenness Highlights
- The long-term satellite record (1982-2018) indicates "greening" across most Arctic tundra regions, especially Alaska's North Slope, mainland Canada, and the Russian Far East, but trends are not homogeneous, and some regions instead exhibit no trend or "browning," such as the Canadian Archipelago, southwestern Alaska, and parts of northwestern Siberia.
- In 2018, there were stark contrasts in tundra greenness by continent, with a sharp decline in greenness in North America but a modest increase in Eurasia.
- In North America, tundra productivity for the full growing season was the second lowest on record, concurrent with relatively cool spring and summer temperatures and late snowmelt in the Canadian Archipelago and Greenland.