Nitrogen loss from watersheds of interior Alaska underlain with discontinuous permafrost

Jeremy B. Jones, Kevin C. Petrone, Jacques C. Finlay, Larry D. Hinzman, W. Robert Bolton

Research output: Contribution to journalArticle

64 Scopus citations

Abstract

We constructed annual nitrogen budgets for four years for three watersheds underlain with discontinuous permafrost in interior Alaska. During all years, nitrogen export in stream flow exceeded input from deposition, with loss rate greatest from the two watersheds with the lowest spatial extents of permafrost. Elevated nitrogen export appears to be common in regions with discontinuous permafrost, based on nitrogen concentration in streams spanning a latitudinal gradient in permafrost coverage. This pattern of nitrogen loss is counter to temperate regions, where watersheds retain nitrogen even with elevated atmospheric deposition, and unexpected, given that terrestrial primary production appears to be nitrogen limited.

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalGeophysical Research Letters
Volume32
Issue number2
DOIs
StatePublished - Jan 28 2005

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