Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years

Jouzel, Jean; Masson‐Delmotte, Valérie; Cattani, O.; Dreyfus, G.; Falourd, S.; Hoffmann, Georg F.; Minster, Bénédicte; Nouet, Julius; Barnola, Jean-Marc; Chappellaz, J.; Fischer, Hubertus; Gallet, Jean‐Charles; Johnsen, S. J.; Leuenberger, Markus; Loulergue, L.; Luethi, D.; Oerter, Hans; Parrenin, Frédéric; Raisbeck, G. M.; Raynaud, Dominique; Schilt, A.; Schwander, Jakob; Selmo, E.; Souchez, Roland; Spahni, Renato; Stauffer, B.; Steffensen, Jørgen Peder; Stenni, Barbara; Stocker, Thomas F.; Tison, Jean-Louis; Werner, Martin; Wolff, Eric W.

doi:10.1126/science.1141038

Cited by 2,075 publications

(1,950 citation statements)

References 39 publications

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“…There are two conundrums associated with this model in the Southern Hemisphere. The first is that many Southern Hemisphere climate proxies, including Antarctic temperature records, suggest glacial-interglacial climate change occurred broadly in-phase between the Southern and Northern Hemispheres, despite covariance of summer insolation (Mercer, 1984;Jouzel et al, 2007;Wolff et al, 2010a;Huybers & Denton, 2008). Secondly, glacial activity prior to the gLGM, as observed in our compiled chronology, is at odds with a model in which conditions suited to maximum ice growth occurred during the gLGM (Barrows et al, 2007a;Wolff et al, 2009;Doughty et al, 2015).…”

Section: Insolation Changescontrasting

confidence: 48%

The timing and cause of glacial advances in the southern mid-latitudes during the last glacial cycle based on a synthesis of exposure ages from Patagonia and New Zealand

Darvill

Bentley

Stokes

et al. 2016

Quaternary Science Reviews

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Section: Insolation Changescontrasting

confidence: 48%

The timing and cause of glacial advances in the southern mid-latitudes during the last glacial cycle based on a synthesis of exposure ages from Patagonia and New Zealand

Darvill

Bentley

Stokes

et al. 2016

Quaternary Science Reviews

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“…concentration. Figure 1c and d show simulated Greenland, east Antarctic and tropical SST in comparison with corresponding ice core records (NGRIP, 2004;Jouzel et al, 2007) and tropical SST stack (Herbert et al, 2010). The model correctly simulates both the magnitude and temporal dynamics of temperature variations associated with glacial cycles.…”

Section: Model Description and Experimental Setupmentioning

confidence: 99%

The role of orbital forcing, carbon dioxide and regolith in 100 kyr glacial cycles

2011

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Abstract. The origin of the 100 kyr cyclicity, which dominates ice volume variations and other climate records over the past million years, remains debatable. Here, using a comprehensive Earth system model of intermediate complexity, we demonstrate that both strong 100 kyr periodicity in the ice volume variations and the timing of glacial terminations during past 800 kyr can be successfully simulated as direct, strongly nonlinear responses of the climate-cryosphere system to orbital forcing alone, if the atmospheric CO 2 concentration stays below its typical interglacial value. The existence of long glacial cycles is primarily attributed to the North American ice sheet and requires the presence of a large continental area with exposed rocks. We show that the sharp, 100 kyr peak in the power spectrum of ice volume results from the long glacial cycles being synchronized with the Earth's orbital eccentricity. Although 100 kyr cyclicity can be simulated with a constant CO 2 concentration, temporal variability in the CO 2 concentration plays an important role in the amplification of the 100 kyr cycles.

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“…Reconstructions of biomass burning are shown for the global data set and separately for the NH and the SH, with confidence intervals based on bootstrap resampling by site (see the auxiliary material). The NGRIP d 18 O record from Greenland, a proxy for northern high latitude temperature [Johnsen et al, 2001] and the EPICA (EDC) deuterium excess temperature proxy record from Antarctica [Jouzel et al, 2007], are shown for comparison. The ice core data are presented here on the GICC05 age scale, and smoothed using a 500-yr window for comparison with the charcoal records.…”

Section: Development Of Generalized Additive Modelsmentioning

confidence: 99%

Predictability of biomass burning in response to climate changes

Daniau

2012

Quaternary International

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[1] Climate is an important control on biomass burning, but the sensitivity of fire to changes in temperature and moisture balance has not been quantified. We analyze sedimentary charcoal records to show that the changes in fire regime over the past 21,000 yrs are predictable from changes in regional climates. Analyses of paleo-fire data show that fire increases monotonically with changes in temperature and peaks at intermediate moisture levels, and that temperature is quantitatively the most important driver of changes in biomass burning over the past 21,000 yrs. Given that a similar relationship between climate drivers and fire emerges from analyses of the interannual variability in biomass burning shown by remote-sensing observations of month-by-month burnt area between 1996 and 2008, our results signal a serious cause for concern in the face of continuing global warming. , et al. (2012), Predictability of biomass burning in response to climate changes, Global Biogeochem. Cycles, 26, GB4007,

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Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years

Cited by 2,075 publications

References 39 publications

The timing and cause of glacial advances in the southern mid-latitudes during the last glacial cycle based on a synthesis of exposure ages from Patagonia and New Zealand

The timing and cause of glacial advances in the southern mid-latitudes during the last glacial cycle based on a synthesis of exposure ages from Patagonia and New Zealand

The role of orbital forcing, carbon dioxide and regolith in 100 kyr glacial cycles

Predictability of biomass burning in response to climate changes

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