Ice core records of atmospheric N2O covering the last 106,000 years

Todd Sowers, Richard B. Alley, Jennifer Jubenville

Research output: Contribution to journalArticle

103 Scopus citations

Abstract

Paleoatmospheric records of trace-gas concentrations recovered from ice cores provide important sources of information on many biogeochemical cycles involving carbon, nitrogen, and oxygen. Here, we present a 106,000-year record of atmospheric nitrous oxide (N2O) along with corresponding isotopic records spanning the last 30,000 years, which together suggest minimal changes in the ratio of marine to terrestrial N2O production. During the last glacial termination, both marine and oceanic N2O ]emissions increased by 40 ± 8%. We speculate that our records do not support those hypotheses that invoke enhanced export production to explain low carbon dioxide values during glacial periods.

Original languageEnglish (US)
Pages (from-to)945-948
Number of pages4
JournalScience
Volume301
Issue number5635
DOIs
StatePublished - Aug 15 2003

All Science Journal Classification (ASJC) codes

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