New constraints on Northern Hemisphere growing season net flux

Yang, Z. and Washenfelder, R. A. and Keppel-Aleks, G. and Krakauer, N. Y. and Randerson, J. T. and Tans, P. P. and Sweeney, C. and Wennberg, P. O. (2007) New constraints on Northern Hemisphere growing season net flux. Geophysical Research Letters, 34 (12). Art. No. L12807. ISSN 0094-8276. doi:10.1029/2007GL029742. https://resolver.caltech.edu/CaltechAUTHORS:20140702-100545630

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Abstract

Observations of the column-averaged dry molar mixing ratio of CO_2 above both Park Falls, Wisconsin and Kitt Peak, Arizona, together with partial columns derived from aircraft profiles over Eurasia and North America are used to estimate the seasonal integral of net ecosystem exchange (NEE) between the atmosphere and the terrestrial biosphere in the Northern Hemisphere. We find that NEE is ∼25% larger than predicted by the Carnegie Ames Stanford Approach (CASA) model. We show that the estimates of NEE may have been biased low by too weak vertical mixing in the transport models used to infer seasonal changes in Northern Hemisphere CO_2 mass from the surface measurements of CO_2 mixing ratio.

Item Type:

Article

Related URLs:

URL	URL Type	Description
http://dx.doi.org/10.1029/2007GL029742	DOI	Article
http://onlinelibrary.wiley.com/doi/10.1029/2007GL029742/abstract	Publisher	Article
http://onlinelibrary.wiley.com/doi/10.1029/2007GL029742/suppinfo	Related Item	Supporting Information

ORCID:

Author	ORCID
Washenfelder, R. A.	0000-0002-8106-3702
Randerson, J. T.	0000-0001-6559-7387
Sweeney, C.	0000-0001-9568-0050
Wennberg, P. O.	0000-0002-6126-3854

Additional Information:

© 2007 American Geophysical Union. Received 5 March 2007; revised 27 April 2007; accepted 1 May 2007; article first published online 23 June 2007. We thank the TransCom 3 modeling community (K. Gurney, M. Prather, T. Maki, L. Bruhwiler, Y. Chen, R. Law, C. Yuen, S. Fan, M. Heimann, and D. Baker) for making the results of their simulations publicly available. This work was supported by a NASA grant NNG05GD07G. N. Y. Krakauer was supported by Graduate Fellowships from both NASA Earth and Space Science and the Betty and Gordon Moore Foundation.

Funders:

Funding Agency	Grant Number
NASA	NNG05GD07G
NASA Graduate Fellowship	UNSPECIFIED
NASA Earth and Space Science Fellowship	UNSPECIFIED
Gordon and Betty Moore Foundation	UNSPECIFIED

Subject Keywords:

Northern Hemisphere; terrestrial carbon sink; net ecosystem exchange; column-averaged CO_2; aircraft profiles; inverse modeling

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DOI:

10.1029/2007GL029742

Record Number:

CaltechAUTHORS:20140702-100545630

Persistent URL:

https://resolver.caltech.edu/CaltechAUTHORS:20140702-100545630

Official Citation:

Yang, Z., R. A. Washenfelder, G. Keppel-Aleks, N. Y. Krakauer, J. T. Randerson, P. P. Tans, C. Sweeney, and P. O. Wennberg (2007), New constraints on Northern Hemisphere growing season net flux, Geophys. Res. Lett., 34, L12807, doi:10.1029/2007GL029742.

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ID Code:

46629

Collection:

CaltechAUTHORS

Deposited By:

Ruth Sustaita

Deposited On:

02 Jul 2014 18:25

Last Modified:

10 Nov 2021 17:28

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