A global mean sea surface based upon GEOS 3 and Seasat altimeter data

1992 ◽  
Vol 97 (B4) ◽  
pp. 4915 ◽  
Author(s):  
J. G. Marsh ◽  
C. J. Koblinsky ◽  
H. J. Zwally ◽  
A. C. Brenner ◽  
B. D. Beckley
1982 ◽  
Vol 87 (B13) ◽  
pp. 10955-10964 ◽  
Author(s):  
James G. Marsh ◽  
Thomas V. Martin ◽  
John J. McCarthy

2012 ◽  
Vol 35 (sup1) ◽  
pp. 3-19 ◽  
Author(s):  
P. Schaeffer ◽  
Y. Faugére ◽  
J. F. Legeais ◽  
A. Ollivier ◽  
T. Guinle ◽  
...  

1986 ◽  
Vol 91 (B3) ◽  
pp. 3501-3506 ◽  
Author(s):  
James G. Marsh ◽  
Anita C. Brenner ◽  
Brian D. Beckley ◽  
Thomas V. Martin

1994 ◽  
Vol 99 (B3) ◽  
pp. 4519-4531 ◽  
Author(s):  
S. Houry ◽  
J. F. Minster ◽  
C. Brossier ◽  
K. Dominh ◽  
M. C. Gennero ◽  
...  

Author(s):  
Erin McClymont ◽  
Heather Ford ◽  
Sze Ling Ho ◽  
Julia Tindall ◽  
Alan Haywood ◽  
...  

<p>A range of future climate scenarios are projected for high atmospheric CO<sub>2</sub> concentrations, given uncertainties over future human actions as well as potential environmental and climatic feedbacks. The geological record offers an opportunity to understand climate system response to a range of forcings and feedbacks which operate over multiple temporal and spatial scales. Here, we examine a single interglacial during the late Pliocene (KM5c, ca. 3.205 +/- 0.01 Ma) when atmospheric CO<sub>2</sub> concentrations were higher than pre-industrial, but similar to today and to the lowest emission scenarios for this century. As orbital forcing and continental configurations were almost identical to today, we are able to focus on equilibrium climate system response to modern and near-future CO<sub>2</sub>. Using proxy data from 32 sites, we demonstrate that global mean sea-surface temperatures were warmer than pre-industrial, by ~2.3 ºC for the combined proxy data (foraminifera Mg/Ca and alkenones), or by ~3.2ºC (alkenones only). Compared to the pre-industrial, reduced meridional gradients and enhanced warming in the North Atlantic are consistently reconstructed. There is broad agreement between data and models at the global scale, with regional differences reflecting ocean circulation and/or proxy signals. An uneven distribution of proxy data in time and space does, however, add uncertainty to our anomaly calculations. The reconstructed global mean sea-surface temperature anomaly for KM5c is warmer than all but three of the PlioMIP2 model outputs, and the reconstructed North Atlantic data tend to align with the warmest KM5c model values.  Our results demonstrate that even under low CO<sub>2</sub> emission scenarios, surface ocean warming may be expected to exceed model projections, and will be accentuated in the higher latitudes.</p>


2012 ◽  
Vol 5 (2) ◽  
pp. 523-533 ◽  
Author(s):  
Z. S. Zhang ◽  
K. Nisancioglu ◽  
M. Bentsen ◽  
J. Tjiputra ◽  
I. Bethke ◽  
...  

Abstract. The mid-Pliocene period (3.3 to 3.0 Ma) is known as a warm climate with atmospheric greenhouse gas levels similar to the present. As the climate at this time was in equilibrium with the greenhouse forcing, it is a valuable test case to better understand the long-term response to high levels of atmospheric greenhouse gases. In this study, we use the low resolution version of the Norwegian Earth System Model (NorESM-L) to simulate the pre-industrial and the mid-Pliocene climate. Comparison of the simulation with observations demonstrates that NorESM-L simulates a realistic pre-industrial climate. The simulated mid-Pliocene global mean surface air temperature is 16.7 °C, which is 3.2 °C warmer than the pre-industrial. The simulated mid-Pliocene global mean sea surface temperature is 19.1 °C, which is 2.0 °C warmer than the pre-industrial. The warming is relatively uniform globally, except for a strong amplification at high latitudes.


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