Slowdown of global surface air temperature increase and acceleration of ice melting

Yin, Qiuzhen; Nifenecker, H.; Poitou, Jean

doi:10.1002/2017ef000554

Cited by 8 publications

(6 citation statements)

References 71 publications

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“…Therefore, the 1:1 ratio of energy going into the ocean and melting grounded ice has to be regarded as an average over the whole last glacial transition and cannot be expected to hold for the anthropogenic warming. However, as a recent study has shown 28 , including ice melting is important to close also the current global energy budget and can provide new insights into the mechanism behind recent decadal global temperature variabilities.…”

Section: Article Researchmentioning

confidence: 99%

Mean global ocean temperatures during the last glacial transition

Bereiter

Shackleton

Baggenstos

et al. 2018

Nature

159

224

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Little is known about the ocean temperature's long-term response to climate perturbations owing to limited observations and a lack of robust reconstructions. Although most of the anthropogenic heat added to the climate system has been taken up by the ocean up until now, its role in a century and beyond is uncertain. Here, using noble gases trapped in ice cores, we show that the mean global ocean temperature increased by 2.57 ± 0.24 degrees Celsius over the last glacial transition (20,000 to 10,000 years ago). Our reconstruction provides unprecedented precision and temporal resolution for the integrated global ocean, in contrast to the depth-, region-, organism- and season-specific estimates provided by other methods. We find that the mean global ocean temperature is closely correlated with Antarctic temperature and has no lead or lag with atmospheric CO, thereby confirming the important role of Southern Hemisphere climate in global climate trends. We also reveal an enigmatic 700-year warming during the early Younger Dryas period (about 12,000 years ago) that surpasses estimates of modern ocean heat uptake.

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Section: Article Researchmentioning

confidence: 99%

Mean global ocean temperatures during the last glacial transition

Bereiter

Shackleton

Baggenstos

et al. 2018

Nature

159

224

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“…Globally, despite continuing increase in atmospheric CO 2 concentration, there has been a recent slowdown in the rate of warming. This may be due to a redistribution of heat within the atmosphere-cryosphere system ( 15 ), with the reduction in atmospheric heating almost equating in energy terms to the contemporaneous increases in ice melting.…”

Section: Introduction – Climate Change In Antarcticamentioning

confidence: 99%

Antarctic environmental change and biological responses

2019

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Antarctica and the surrounding Southern Ocean are facing complex environmental change. Their native biota has adapted to the region's extreme conditions over many millions of years. This unique biota is now challenged by environmental change and the direct impacts of human activity. The terrestrial biota is characterized by considerable physiological and ecological flexibility and is expected to show increases in productivity, population sizes and ranges of individual species, and community complexity. However, the establishment of non-native organisms in both terrestrial and marine ecosystems may present an even greater threat than climate change itself. In the marine environment, much more limited response flexibility means that even small levels of warming are threatening. Changing sea ice has large impacts on ecosystem processes, while ocean acidification and coastal freshening are expected to have major impacts.

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“…It should be noted that residual global ice volume might have been higher during MIS 19 than MIS 1 (Elderfield et al 2012;Regattieri et al 2019;Vavrus et al 2018). This may have increased climate sensitivity during MIS 19 given the nonlinear relationship between astronomical forcing and ice volume during the Quaternary (Past Interglacials Working Group of PAGES 2016) and the fact that polar ice volume provides one of the most important feedback mechanisms in the climate response to radiative forcing (Berger et al 2017;Westerhold et al 2020).…”

Section: The Climatic Evolution Of Mis 19mentioning

confidence: 99%

Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19

Head

2021

Prog Earth Planet Sci

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The Global Boundary Stratotype Section and Point (GSSP) defining the base of the Chibanian Stage and Middle Pleistocene Subseries at the Chiba section, Japan, was ratified on January 17, 2020. Although this completed a process initiated by the International Union for Quaternary Research in 1973, the term Middle Pleistocene had been in use since the 1860s. The Chiba GSSP occurs immediately below the top of Marine Isotope Substage (MIS) 19c and has an astronomical age of 774.1 ka. The Matuyama–Brunhes paleomagnetic reversal has a directional midpoint just 1.1 m above the GSSP and serves as the primary guide to the boundary. This reversal lies within the Early–Middle Pleistocene transition and has long been favoured to mark the base of the Middle Pleistocene. MIS 19 occurs within an interval of low-amplitude orbital eccentricity and was triggered by an obliquity cycle. It spans two insolation peaks resulting from precession minima and has a duration of ~ 28 to 33 kyr. MIS 19c begins ~ 791–787.5 ka, includes full interglacial conditions which lasted for ~ 8–12.5 kyr, and ends with glacial inception at ~ 774–777 ka. This inception has left an array of climatostratigraphic signals close to the Early–Middle Pleistocene boundary. MIS 19b–a contains a series of three or four interstadials often with rectangular-shaped waveforms and marked by abrupt (< 200 year) transitions. Intervening stadials including the inception of glaciation are linked to the calving of ice sheets into the northern North Atlantic and consequent disruption of the Atlantic meridional overturning circulation (AMOC), which by means of the thermal bipolar seesaw caused phase-lagged warming events in the Antarctic. The coherence of stadial–interstadial oscillations during MIS 19b–a across the Asian–Pacific and North Atlantic–Mediterranean realms suggests AMOC-originated shifts in the Intertropical Convergence Zone and pacing by equatorial insolation forcing. Low-latitude monsoon dynamics appear to have amplified responses regionally although high-latitude teleconnections may also have played a role.

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Slowdown of global surface air temperature increase and acceleration of ice melting

Cited by 8 publications

References 71 publications

Mean global ocean temperatures during the last glacial transition

Mean global ocean temperatures during the last glacial transition

Antarctic environmental change and biological responses

Review of the Early–Middle Pleistocene boundary and Marine Isotope Stage 19

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