Sea level ~400 000 years ago (MIS 11): analogue for present and future sea-level?

Bowen, D. Q.

doi:10.5194/cp-6-19-2010

Cited by 65 publications

(39 citation statements)

References 91 publications

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“…Second, our dataset indicates that MIS9 (that can be compound) was prone to leave terraces whereas MIS11 is not characterized by notably large terraces, as proposed in former works (BOWEN 2010;e.g., MASSON-DELMOTTE et al 2010;ORTLIEB et al 1996;ORTLIEB et al 2003;PAST INTERGLACIALS WORKING GROUP OF PAGES 2016;REGARD et al 2010;ROHLING et al 2010;SIDDALL et al 2006). Interestingly, the width figure ( Figure 12) confirms that usually the MIS5 terrace is the most developed terrace (JOHNSON & LIBBEY 1997;PEDOJA et al 2011a).…”

Section: Possible Implications At Global Scalesupporting

confidence: 51%

“…On the other hand, assigning T05 to MIS11 ensures that within the sequence, all the successive interglacials are represented by a terrace ( Figure 5). This latter case appears more likely, since MIS11 has been reported to be a long-lasting interglacial, leading to extensive rock shore coastal landforms (BOWEN 2010;cf. ORTLIEB et al 2003;REGARD et al 2010;SIDDALL et al 2006).…”

Section: San Clemente Ca Usamentioning

confidence: 99%

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Geometrical trends within sequences of Pleistocene marine terraces: selected examples from California, Peru, Chile and New-Zealand

Regard¹,

Pedoja²,

Torre³

et al. 2017

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Elevations of the shoreline angles of marine terraces have long been used to infer Pleistocene sea levels and/or uplift rates. We attempt to use morphologic properties of sequences of marine terraces -terrace width and slope-in order to track if these constitute a pattern showing similar alternations at different sites and if this alternation is comparable to the signal from the sea level highstand succession -duration and sea level-for Middle-Late Pleistocene. To do so, we focus on sequences of marine terrace including more than 10 successive strandlines from San Clemente Island and Santa Cruz (both in California, USA). We generated and analyzed 30 topographic profiles in order to confirm the occurrence or lack of each terrace, and to characterize their width and slope. To complement the observation of tenuous trends, we used additional data from previous works at Point Reyes (California, USA), Altos de Talinay (central Chile), San Juan de Marcona (central Peru) and South Taranaki (Northern Island, New Zealand). These additional data strengthen the observations made at San Clemente and Santa Cruz and prove that the most prominent terrace observed is usually carved during the Marine Isotopic Stage 5 (MIS5). Moreover, some terraces appear better expressed than the others: those formed during MIS7, MIS9 plus one of those formed during MIS15, MIS17 or MIS19 highstands. The terraces formed during MIS11 are not preeminent, contrary to what expected from its long highstand duration.

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Section: Possible Implications At Global Scalesupporting

confidence: 51%

Section: San Clemente Ca Usamentioning

confidence: 99%

Geometrical trends within sequences of Pleistocene marine terraces: selected examples from California, Peru, Chile and New-Zealand

Regard¹,

Pedoja²,

Torre³

et al. 2017

zfg

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“…Published studies of the magnitude of emergent shorelines attributed to MIS 11 have generated highly divergent estimates, from ∼22 m above present (54) to levels near present (55). After correcting sites for glacial isostatic adjustment (GIA), Raymo and Mitrovica (56) estimated that peak sea level during MIS 11 was 6 m to 13 m higher than present.…”

Section: Paleo-evidencementioning

confidence: 99%

The multimillennial sea-level commitment of global warming

Levermann

Clark

Marzeion

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

262

224

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Global mean sea level has been steadily rising over the last century, is projected to increase by the end of this century, and will continue to rise beyond the year 2100 unless the current global mean temperature trend is reversed. Inertia in the climate and global carbon system, however, causes the global mean temperature to decline slowly even after greenhouse gas emissions have ceased, raising the question of how much sea-level commitment is expected for different levels of global mean temperature increase above preindustrial levels. Although sealevel rise over the last century has been dominated by ocean warming and loss of glaciers, the sensitivity suggested from records of past sea levels indicates important contributions should also be expected from the Greenland and Antarctic Ice Sheets. Uncertainties in the paleo-reconstructions, however, necessitate additional strategies to better constrain the sea-level commitment. Here we combine paleo-evidence with simulations from physical models to estimate the future sea-level commitment on a multimillennial time scale and compute associated regional sea-level patterns. Oceanic thermal expansion and the Antarctic Ice Sheet contribute quasi-linearly, with 0.4 m°C −1 and 1.2 m°C −1 of warming, respectively. The saturation of the contribution from glaciers is overcompensated by the nonlinear response of the Greenland Ice Sheet. As a consequence we are committed to a sea-level rise of approximately 2.3 m°C −1 within the next 2,000 y. Considering the lifetime of anthropogenic greenhouse gases, this imposes the need for fundamental adaptation strategies on multicentennial time scales.climate change | climate impacts | sea-level change S ea-level projections show a robust, albeit highly uncertain, increase by the end of this century (1, 2), and there is strong evidence that sea level will continue to rise beyond the year 2100 unless the current global mean temperature trend is reversed (3-6). At the same time, inertia in the climate and global carbon system causes the global mean temperature to decline slowly even after greenhouse gas emissions have ceased (6), raising the question of how much sea-level rise we are committed to on a multimillennial time scale for different levels of global mean temperature increase. During the 20th century, sea level rose by approximately 0.2 m (7, 8), and it is estimated to rise by significantly less than 2 m by 2100, even for the strongest scenarios considered (9). At the same time, past climate records suggest a sea-level sensitivity of as much as several meters per degree of warming during previous intervals of Earth history when global temperatures were similar to or warmer than present (10, 11). Although sea-level rise over the last century has been dominated by ocean warming and loss of glaciers (7), the sensitivity suggested from records of past sea level indicates important contributions from the Greenland and Antarctic Ice Sheets. Because of the uncertainties in the paleo-reconstructions, however, additional strategies are req...

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“…More recently, a global synthesis was provided by Bowen (2010), wherein 11 sites with MIS 5e and MIS 11 strandlines are dated. We included all the sites provided by Bowen (2010) except two.…”

mentioning

confidence: 99%

“…We included all the sites provided by Bowen (2010) except two. Regarding the Sabatini site in Italy, we considered that the MIS 5e shorelines in the area stand at 37 ± 8 m whereas Bowen (2010) only considered a local shoreline angle at 20 ± 1 m. We chose to ignore the elevation measurements of the MIS 11 strandline in West Sussex, because the relationship between this terrace and the MIS 11 highstand was unclear (Bowen, 2010).…”

mentioning

confidence: 99%

Coastal staircase sequences reflecting sea-level oscillations and tectonic uplift during the Quaternary and Neogene

Pedoja

Husson

Johnson

et al. 2014

Earth-Science Reviews

165

195

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. Many coasts feature sequences of Quaternary and Neogene shorelines that are shaped by a combination of sealevel oscillations and tectonics. We compiled a global synthesis of sea-level changes for the following highstands: MIS 1, MIS 3, MIS 5e and MIS 11. Also, we date the apparent onset of sequences of paleoshorelines either from published data or tentatively extrapolating an age for the uppermost, purported oldest shoreline in each sequence. Including the most documented MIS 5e benchmark, we identify 926 sequences out of which 185 also feature Holocene shorelines. Six areas are identified where elevations of the MIS 3 shorelines are known, and 31 feature elevation data for MIS 11 shorelines. Genetic relationships to regional geodynamics are further explored based on the elevations of the MIS 5e benchmark. Mean apparent uplift rates range from 0.01 ± 0.01 mm/yr (hotspots) to 1.47 ± 0.08 mm/yr (continental collision). Passive margins appear as ubiquitously uplifting, while tectonic segmentation is more important on active margins. From the literature and our extrapolations, we infer ages for the onset of formation for~180 coastal sequences. Sea level fingerprinting on coastal sequences started at least during mid Miocene and locally as early as Eocene. Whether due to the changes in the bulk volume of seawater or to the temporal variations in the shape of ocean basins, estimates of eustasy fail to explain the magnitude of the apparent sea level drop. Thus, vertical ground motion is invoked, and we interpret the longlasting development of those paleoshore sequences as the imprint of glacial cycles on globally uplifted margins in response to continental compression. The geomorphological expression of the sequences matches the amplitude and frequency of glacial cyclicity. From middle Pleistocene to present-day, moderately fast (100,000 yrs) oscillating sea levels favor the development of well identified strandlines that are distinct from one another. Pliocene and Lower Pleistocene strandlines associated with faster cyclicity (40,000 yrs) are more compact and easily merge into rasas, whereas older Cenozoic low-frequency eustatic changes generally led to widespread flat-lying coastal plains.

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Sea level ~400 000 years ago (MIS 11): analogue for present and future sea-level?

Cited by 65 publications

References 91 publications

Geometrical trends within sequences of Pleistocene marine terraces: selected examples from California, Peru, Chile and New-Zealand

Geometrical trends within sequences of Pleistocene marine terraces: selected examples from California, Peru, Chile and New-Zealand

The multimillennial sea-level commitment of global warming

Coastal staircase sequences reflecting sea-level oscillations and tectonic uplift during the Quaternary and Neogene

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