Contribution of disturbance to increasing seasonal amplitude of atmospheric CO2


Journal Article

Recent increases in the seasonal amplitude of atmospheric carbon dioxide (CO2) at high latitudes suggest a widespread biospheric response to high-latitude warming. The seasonal amplitude of net ecosystem carbon exchange by northern Siberian ecosystems is shown to be greater in disturbed than undisturbed sites, due to increased summer influx and increased winter efflux. Increased disturbance could therefore contribute significantly to the amplified seasonal cycle of atmospheric carbon dioxide at high latitudes. Warm temperatures reduced summer carbon influx, suggesting that high-latitude warming, if it occurred, would be unlikely to increase seasonal amplitude of carbon exchange.

Full Text

Duke Authors

Cited Authors

  • Zimov, SA; Davidov, SP; Zimova, GM; Davidova, AI; Chapin, FS; Chapin, MC; Reynolds, JF

Published Date

  • June 1999

Published In

Volume / Issue

  • 284 / 5422

Start / End Page

  • 1973 - 1976

PubMed ID

  • 10373112

Pubmed Central ID

  • 10373112

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.284.5422.1973


  • eng