Multiple constraints on regional CO 2 flux variations over land and oceans

• Published in: Global Biogeochemical Cycles
• Main Authors: Peylin, P., Bousquet, P., Le Quéré, C., Sitch, S., Friedlingstein, P., Mckinley, G., Gruber, N., Rayner, P., Ciais, P.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: 2005
• Subjects: Austral; Austral Ocean; Pacific
• Online Access: http://hdl.handle.net/11858/00-001M-0000-000E-D340-3; http://hdl.handle.net/11858/00-001M-0000-000E-D33F-9

To increase our understanding of the carbon cycle, we compare regional estimates of CO 2 flux variability for 1980 - 1998 from (SLAVE and LPJ) and ocean (OPA and MIT). Over the land, the phase and amplitude of the different estimates agree well, especially at continental scale. Flux variations are predominantly controlled by El Nino events, with the exception of the post-Pinatubo period of the early 1990s. Differences between the two land models result mainly from the response of heterotrophic respiration to precipitation and temperature. The "Lloyd and Taylor'' formulation of LPJ [Lloyd and Taylor, 1994] agrees better with the inverse the equatorial Pacific and partly in the austral ocean. In the OPA model, and results from increased stratification of the ocean. In the northern oceans, the inversions estimate large flux Atlantic, but not supported by the two model estimates, thus further investigation. [References: 88]