Strong regional atmospheric C-14 signature of respired CO2 observed from a tall tower over the midwestern United States

LaFranchi, B. W.; McFarlane, K. J.; Miller, J. B.; Lehman, S. J.; Phillips, C. L.; Andrews, A. E.; Tans, P. P.; Chen, H.; Liu, Z.; Turnbull, J. C.; Xu, X.; Guilderson, T. P.

doi:10.1002/2015jg003271

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Strong regional atmospheric C-14 signature of respired CO2 observed from a tall tower over the midwestern United States

2016
By LaFranchi, B. W. ; McFarlane, K. J. ; Miller, J. B. ; ...
Source: Journal of Geophysical Research-Biogeosciences, 121(8), 2275-2295.

[PDF-2.28 MB]

Details Related Documents You May Also Like

Details:

Journal Title:

Journal of Geophysical Research: Biogeosciences
Personal Author:

LaFranchi, B. W. ; McFarlane, K. J. ; Miller, J. B. ; Lehman, S. J. ; Phillips, C. L. ; ... More +

LaFranchi, B. W. ; McFarlane, K. J. ; Miller, J. B. ; Lehman, S. J. ; Phillips, C. L. ; Andrews, A. E. ; Tans, P. P. ; Chen, H. ; Liu, Z. ; Turnbull, J. C. ; Xu, X. ; Guilderson, T. P. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; GML (Global Monitoring Laboratory)

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; GML (Global Monitoring Laboratory) Less -
Description:

Radiocarbon in CO2 ((CO2)-C-14) measurements can aid in discriminating between fast (< 1 year) and slower (> 5-10 years) cycling of C between the atmosphere and the terrestrial biosphere due to the 14C disequilibrium between atmospheric and terrestrial C. However, (CO2)-C-14 in the atmosphere is typically much more strongly impacted by fossil fuel emissions of CO2, and, thus, observations often provide little additional constraints on respiratory flux estimates at regional scales. Here we describe a data set of (CO2)-C-14 observations from a tall tower in northern Wisconsin (USA) where fossil fuel influence is far enough removed that during the summer months, the biospheric component of the (CO2)-C-14 budget dominates. We find that the terrestrial biosphere is responsible for a significant contribution to (CO2)-C-14 that is 2-3 times higher than predicted by the Carnegie-Ames-Stanford approach terrestrial ecosystem model for observations made in 2010. This likely includes a substantial contribution from the North American boreal ecoregion, but transported biospheric emissions from outside the model domain cannot be ruled out. The (CO2)-C-14 enhancement also appears somewhat decreased in observations made over subsequent years, suggesting that 2010 may be anomalous. With these caveats acknowledged, we discuss the implications of the observation/ model comparison in terms of possible systematic biases in the model versus short-term anomalies in the observations. Going forward, this isotopic signal could be exploited as an important indicator to better constrain both the long-term carbon balance of terrestrial ecosystems and the short-term impact of disturbance-based loss of carbon to the atmosphere.
Source:

Journal of Geophysical Research-Biogeosciences, 121(8), 2275-2295.
DOI:

http://dx.doi.org/10.1002/2015jg003271
Document Type:

Journal Article
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:577fa4df8d6a12600e23f9704da13982616639d4e6c56386d1d2c40e11a648d5
Download URL:

https://repository.library.noaa.gov/view/noaa/18309/noaa_18309_DS1.pdf
File Type:

No Additional Files

More +

Strong regional atmospheric C-14 signature of respired CO2 observed from a tall tower over the midwestern United States

Details:

Supporting Files

Related Documents

You May Also Like