Sentences with phrase «ocean carbon cycle coupling»

Zachos's research primarily focuses on the dynamics of climate and ocean carbon cycle coupling over geologic time, particularly during periods of rapid and extreme change.

Not exact matches

«Changes in ocean circulation have been proposed as a trigger mechanism for the large coupled climate and carbon cycle perturbations at the Paleocene - Eocene Thermal Maximum (PETM, ca. 55 Ma).

By 2100, the ocean uptake rate of 5 Gt C yr - 1 is balanced by the terrestrial carbon source, and atmospheric CO2 concentrations are 250 p.p.m.v. higher in our fully coupled simulation than in uncoupled carbon models2, resulting in a global - mean warming of 5.5 K, as compared to 4 K without the carbon - cycle feedback.

Proposed explanations for the discrepancy include ocean — atmosphere coupling that is too weak in models, insufficient energy cascades from smaller to larger spatial and temporal scales, or that global climate models do not consider slow climate feedbacks related to the carbon cycle or interactions between ice sheets and climate.

Furthermore, ocean acidification is happening even more quickly in the Arctic, as shown in Stenacher et al. (2009, April), «Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle - climate model,» http://www.biogeosciences.net/6/515/2009/bg-6-515-2009.pdf (open access):

It combines representations of the global economy, energy systems, agriculture and land use, with representation of terrestrial and ocean carbon cycles, a suite of coupled gas - cycle, climate, and ice - melt models.

Abstract: A coupled atmosphere - ocean - carbon cycle model is used to examine the long term climate implications of various 2050 greenhouse gas emission reduction targets.

The regional arrays provide a sampling of ocean conditions around the world that is designed to produce an integrated data set that can be used to address questions related to physical - biogeochemical coupling in eddies, phytoplankton phenology (cyclic and seasonal phenomena), nutrient supply, and climate effects on ocean carbon cycling in selected regions.

Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle - climate model

Decay of a CO2 excess amount of 5000 PgC emitted at time zero into the atmosphere, and its subsequent redistribution into land and ocean as a function of time, computed by coupled carbon - cycle climate models.

Coupled carbon - cycle climate models indicate that less carbon is taken up by the ocean and land as the climate warms constituting a positive climate feedback.

However, detailed climate projections carried out with Atmosphere - Ocean General Circulation Models (AOGCMs) have typically used a prescribed CO2 concentration scenario, neglecting two - way coupling between climate and the carbon cycle.

«(3) ocean model simulations (e.g., Le Quéré et al., 2003; McKinley et al., 2004a) and (4) terrestrial carbon cycle and coupled model simulations (e.g., C. Jones et al., 2001; McGuire et al., 2001; Peylin et al., 2005; Zeng et al., 2005).»

Meinshausen, M., S. C. B. Raper, and T. M. L. Wigley, 2011: Emulating coupled atmosphere — ocean and carbon cycle models with a simpler model, MAGICC6 — Part 1: Model description and calibration.

The high - density observations from NASA's OCO - 2 mission, coupled with surface ocean CO2 measurements from NOAA buoys, have provided us with a unique data set to track the atmospheric CO2 concentrations and unravel the timing of the response of the ocean and the terrestrial carbon cycle during the 2015 — 2016 El Niño.

Coupled models added a new level of realism by considering the carbon cycle, in addition to atmosphere and ocean.