A Holocene CO2 record from the stomatal index of subfossil Salix herbacea L. leaves from northern Sweden

A stomatal-based method of palaeo-CO 2 estimation has been applied to a temporally detailed sequence of leaves from a high-latitude lake (68°N) in northern Sweden spanning the last 9000 years. The resulting atmospheric CO 2 reconstruction documents the onset of a gradual increase c. 5000 years befor...

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Bibliographic Details
Published in:The Holocene
Main Authors: Rundgren, Mats, Beerling, David
Format: Article in Journal/Newspaper
Language:English
Published: SAGE Publications 1999
Subjects:
Paleontology
Earth-Surface Processes
Ecology
Archeology
Global and Planetary Change
Northern Sweden
Salix herbacea
Online Access:http://dx.doi.org/10.1191/095968399677717287
http://journals.sagepub.com/doi/pdf/10.1191/095968399677717287
Description
Summary:A stomatal-based method of palaeo-CO 2 estimation has been applied to a temporally detailed sequence of leaves from a high-latitude lake (68°N) in northern Sweden spanning the last 9000 years. The resulting atmospheric CO 2 reconstruction documents the onset of a gradual increase c. 5000 years before present indicating that the carbon cycle has not been in steady state over this time. Stable carbon isotope (δ 13 C) measurements of the subfossil leaves constrain the interpretation of the inferred changes in the operation of the global carbon cycle. The δ 13 C data reveal no marked or systematic shifts towards more negative values indicating that the CO 2 addition to the atmosphere 5000–1000 yr BP may have been predominantly of oceanic origin.

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