Climate Dynamics

, Volume 38, Issue 7, pp 1421–1431

Greening in the circumpolar high-latitude may amplify warming in the growing season

  • Jee-Hoon Jeong
  • Jong-Seong Kug
  • Baek-Min Kim
  • Seung-Ki Min
  • Hans W. Linderholm
  • Chang-Hoi Ho
  • David Rayner
  • Deliang Chen
  • Sang-Yoon Jun
Article

DOI: 10.1007/s00382-011-1142-x

Cite this article as:
Jeong, J., Kug, J., Kim, B. et al. Clim Dyn (2012) 38: 1421. doi:10.1007/s00382-011-1142-x

Abstract

We present a study that suggests greening in the circumpolar high-latitude regions amplifies surface warming in the growing season (May–September) under enhanced greenhouse conditions. The investigation used a series of climate simulations with the Community Atmospheric Model version 3—which incorporates a coupled, dynamic global vegetation model—with and without vegetation feedback, under both present and doubled CO2 concentrations. Results indicate that climate warming and associated changes promote circumpolar greening with northward expansion and enhanced greenness of both the Arctic tundra and boreal forest regions. This leads to additional surface warming in the high-latitudes in the growing season, primarily through more absorption of incoming solar radiation. The resulting surface and tropospheric warming in the high-latitude and Arctic regions weakens prevailing tropospheric westerlies over 45–70N, leading to the formation of anticyclonic pressure anomalies in the Arctic regions. These pressure anomalies resemble the anomalous circulation pattern during the negative phase of winter Arctic Oscillation. It is suggested that these circulation anomalies reinforce the high-latitude and Arctic warming in the growing season.

Keywords

VegetationArctic warmingArctic greeningClimate modelFuture climateAtmospheric circulationSurface energy budget

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Jee-Hoon Jeong
    • 1
  • Jong-Seong Kug
    • 2
  • Baek-Min Kim
    • 3
  • Seung-Ki Min
    • 4
  • Hans W. Linderholm
    • 1
  • Chang-Hoi Ho
    • 5
  • David Rayner
    • 1
  • Deliang Chen
    • 1
  • Sang-Yoon Jun
    • 5
  1. 1.Department of Earth SciencesUniversity of GothenburgGothenburgSweden
  2. 2.Korea Ocean Research and Development InstituteAnsanKorea
  3. 3.Korea Polar Research InstituteInchonKorea
  4. 4.Climate Research DivisionEnvironment CanadaTorontoCanada
  5. 5.School of Earth and Environmental SciencesSeoul National UniversitySeoulKorea