Regional Hotspots of Change in Northern High Latitudes Informed by Observations From Space

• 出版年: Geophysical Research Letters
• 主要な著者: Jennifer D. Watts, Stefano Potter, Brendan M. Rogers, Anna‐Maria Virkkala, Greg Fiske, Kyle A. Arndt, Arden Burrell, Kevin Butler, Bob Gerlt, John Grayson, Tatiana A. Shestakova, Jinyang Du, Youngwook Kim, Frans‐Jan W. Parmentier, Susan M. Natali
• フォーマット: 論文
• 言語: 英語
• 出版事項: Wiley 2025-01-01
• 主題: arctic; boreal; change detection; permafrost; amplification
• オンライン･アクセス: https://doi.org/10.1029/2023GL108081
• ISSN: 0094-8276; 1944-8007

Abstract The high latitudes cover ∼20% of Earth's land surface. This region is facing many shifts in thermal, moisture and vegetation properties, driven by climate warming. Here we leverage remote sensing and climate reanalysis records to improve understanding of changes in ecosystem indicators. We applied non‐parametric trend detections and Getis‐Ord Gi* spatial hotspot assessments. We found substantial terrestrial warming trends across Siberia, portions of Greenland, Alaska, and western Canada. The same regions showed increases in vapor pressure deficit; changes in precipitation and soil moisture were variable. Vegetation greening and browning were widespread across both continents. Browning of the boreal zone was especially evident in autumn. Multivariate hotspot analysis indicated that Siberian ecoregions have experienced substantial, simultaneous, changes in thermal, moisture and vegetation status. Finally, we found that using regionally‐based trends alone, without local assessments, can yield largely incomplete views of high‐latitude change.