The sensitivity of some high-latitude boreal forests to climatic parameters

Journal Article (Journal Article)

A gap model of environmental processes and vegetation patterns in boreal forests was used to examine the sensitivity of permafrost and permafrostfree forests in interior Alaska to air temperature and precipitation changes. These analyses indicated that in the uplands of interior Alaska, the effect of climatic warming on the ecology of boreal forests may not be so much a direct response to increased air temperature as it may be a response to the increased potential evapotranspiration demands that will accompany climatic warmings. On poorlydrained north slopes with permafrost, the drier forest floor reduced the flux of heat into the soil profile. This was offset by increased fire severity, which by removing greater amounts of the forest floor increased the depth of soil thawing and converted the cold black spruce forests to warmer mixed hardwood-spruce forests. On well-drained south slopes, the increased potential water loss reduced available soil moisture, converting these mesic sites to dry aspen forests, or if too dry to steppe-like vegetation. Increases in precipitation offset the effects of increased potential evapotranspiration demands and mitigated these forest changes. © 1990 Kluwer Academic Publishers.

Full Text

Duke Authors

Cited Authors

  • Bonan, GB; Shugart, HH; Urban, DL

Published Date

  • February 1, 1990

Published In

Volume / Issue

  • 16 / 1

Start / End Page

  • 9 - 29

Electronic International Standard Serial Number (EISSN)

  • 1573-1480

International Standard Serial Number (ISSN)

  • 0165-0009

Digital Object Identifier (DOI)

  • 10.1007/BF00137344

Citation Source

  • Scopus