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. 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.
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| 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. | ||||||||||||
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| Subject Keywords: | Northern Hemisphere; terrestrial carbon sink; net ecosystem exchange; column-averaged CO_2; aircraft profiles; inverse modeling | ||||||||||||
| Issue or Number: | 12 | ||||||||||||
| 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. | ||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
| ID Code: | 46629 | ||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||
| Deposited By: | Ruth Sustaita | ||||||||||||
| Deposited On: | 02 Jul 2014 18:25 | ||||||||||||
| Last Modified: | 09 Mar 2020 13:19 |
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