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Speleothem Records and Climate

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A special issue of Quaternary (ISSN 2571-550X).

Deadline for manuscript submissions: closed (30 September 2018) | Viewed by 79326

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Special Issue Editors

Prof. Dr. Sandy P. Harrison

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Guest Editor

School of Archaeology, Geography & Environmental Sciences, Reading University, Whiteknights, Reading RG6 6AH, UK
Interests: palaeoclimate dynamics; palaeoclimate reconstruction; land–atmosphere interaction; biogeochemical cycles

Dr. Laia Comas Bru

E-Mail Website
Guest Editor

School of Archaeology, Geography & Environmental Sciences, Reading University, Whiteknights, Reading, RG6 6AH, UK
Interests: palaeoclimate dynamics; oxygen isotopes; speleothems

Special Issue Information

Dear Colleagues,

Given their extremely high temporal resolution and the excellent opportunities for dating, speleothem records provide a unique opportunity for assessing climate change on various spatial and temporal scales, over the last 21,000 years and beyond. The different measurements made on speleothems, including the stable isotopes of oxygen and carbon (δ¹⁸O, δ¹³C) and various trace elements, are widely used to reconstruct local changes in the hydrological cycle and changes in atmospheric composition. Furthermore, regional syntheses of speleothem data provide an opportunity to reconstruct changes in atmospheric circulation patterns. Such syntheses open up the possibility of using speleothem records to evaluate state-of-the-art climate models that explicitly simulate water and carbon isotopes and/or atmospheric tracers such as dust. Several of the modelling groups involved in palaeoclimate simulations during the current phase of the Coupled Model Intercomparison Project (CMIP6/PMIP4) are using with isotope- and tracer-enabled model versions, and, thus, it is timely to assess the state of data availability and our understanding of these records.

The SISAL Working Group of the Past Global Changes project (PAGES; http://pastglobalchanges.org/ini/wg/sisal/intro) invites contributions from the community documenting speleothem records and their interpretation for key regions of the world, particularly contributions drawing on the SISAL database. We also invite methodological contributions, including innovative approaches to dating, interpretation, climate reconstruction, and data-model comparison.

Prof. Sandy P. Harrison
Dr. Laia Comas Bru
Guest Editors

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Keywords

Speleothem
δ¹⁸O
δ¹³C
palaeoclimate reconstruction
regional climate dynamics
isotope modelling
CMIP6/PMIP4

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Published Papers (11 papers)

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Editorial

Jump to: Review, Other

11 pages, 547 KiB

Open AccessEditorial

SISAL: Bringing Added Value to Speleothem Research

by Laia Comas-Bru and Sandy P. Harrison

Quaternary 2019, 2(1), 7; https://doi.org/10.3390/quat2010007 - 1 Feb 2019

Cited by 18 | Viewed by 5398

Abstract

Isotopic records from speleothems are an important source of information about past climates and, given the increase in the number of isotope-enabled climate models, are likely to become an important tool for climate model evaluation. SISAL (Speleothem Isotopes Synthesis and Analysis) have created a global database of isotopic records from speleothems in order to facilitate regional analyses and data-model comparison. The papers in this Special Issue showcase the use of the database for regional analyses. In this paper, we discuss some of the important issues underpinning the use of speleothems and how the existence of this database assists palaeoclimate research. We also highlight some of the lessons learned in the creation of the SISAL database and outline potential research going forward. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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Review

Jump to: Editorial, Other

26 pages, 4518 KiB

Open AccessReview

Speleothem Records from the Eastern Part of Europe and Turkey—Discussion on Stable Oxygen and Carbon Isotopes

by Zoltán Kern, Attila Demény, Aurel Perşoiu and István Gábor Hatvani

Quaternary 2019, 2(3), 31; https://doi.org/10.3390/quat2030031 - 18 Sep 2019

Cited by 26 | Viewed by 7320

Abstract

The region comprising of East Central Europe, South East Europe and Turkey contributed to the SISAL (Speleothem Isotopes Synthesis and AnaLysis) global database with stable carbon and oxygen isotope time-series from 18 speleothems from 14 caves. The currently available oldest record from the studied region is the ABA-2 flowstone record (Abaliget Cave; Hungary) reaching back to MIS 6. The temporal distribution of the compiled 18 records from the region points out a ~20 kyr-long period, centering around 100 ka BP, lacking speleothem stable isotope data. The regional subset of SISAL_v1 records displays a continuous coverage for the past ~90 kyr for both δ¹³C and δ¹⁸O, with a mean temporal resolution of ~12 yr for the Holocene, and >50 yr for the pre-Holocene period. The highest temporal resolution both for the Holocene and the pre-Holocene was achieved in the So-1 record (Sofular Cave; Turkey). The relationship between modern day precipitation δ¹⁸O (amount weighted annual and winter season mean values; 1961–2017) and climatological parameters was evaluated. The strong positive correlation found in East Central Europe reinforces the link between modern day precipitation δ¹⁸O, temperature and large-scale circulation (North Atlantic Oscillation) expected to be preserved in the speleothem δ¹⁸O record; while a negative relationship was documented between precipitation amount and oxygen isotope compositions in South East Europe. Variations of δ¹³C values are primarily interpreted as reflecting dry/wet periods across the region. Elevation gradients from three non-overlapping periods of the last ~5 kyr indicated elevation gradients around −0.26‰ per 100 m⁻¹ for calcite δ¹⁸O. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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38 pages, 11433 KiB

Open AccessReview

The Asian Summer Monsoon: Teleconnections and Forcing Mechanisms—A Review from Chinese Speleothem δ¹⁸O Records

by Haiwei Zhang, Yassine Ait Brahim, Hanying Li, Jingyao Zhao, Gayatri Kathayat, Ye Tian, Jonathan Baker, Jian Wang, Fan Zhang, Youfeng Ning, R. Lawrence Edwards and Hai Cheng

Quaternary 2019, 2(3), 26; https://doi.org/10.3390/quat2030026 - 23 Jul 2019

Cited by 87 | Viewed by 11916

Abstract

Asian summer monsoon (ASM) variability significantly affects hydro-climate, and thus socio-economics, in the East Asian region, where nearly one-third of the global population resides. Over the last two decades, speleothem δ¹⁸O records from China have been utilized to reconstruct ASM variability and its underlying forcing mechanisms on orbital to seasonal timescales. Here, we use the Speleothem Isotopes Synthesis and Analysis database (SISAL_v1) to present an overview of hydro-climate variability related to the ASM during three periods: the late Pleistocene, the Holocene, and the last two millennia. We highlight the possible global teleconnections and forcing mechanisms of the ASM on different timescales. The longest composite stalagmite δ¹⁸O record over the past 640 kyr BP from the region demonstrates that ASM variability on orbital timescales is dominated by the 23 kyr precessional cycles, which are in phase with Northern Hemisphere summer insolation (NHSI). During the last glacial, millennial changes in the intensity of the ASM appear to be controlled by North Atlantic climate and oceanic feedbacks. During the Holocene, changes in ASM intensity were primarily controlled by NHSI. However, the spatio-temporal distribution of monsoon rain belts may vary with changes in ASM intensity on decadal to millennial timescales. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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28 pages, 5451 KiB

Open AccessReview

Speleothems from the Middle East: An Example of Water Limited Environments in the SISAL Database

by Yuval Burstyn, Belen Martrat, Jordi F. Lopez, Eneko Iriarte, Matthew J. Jacobson, Mahjoor Ahmad Lone and Michael Deininger

Quaternary 2019, 2(2), 16; https://doi.org/10.3390/quat2020016 - 22 Apr 2019

Cited by 32 | Viewed by 7649

Abstract

The Middle East (ME) spans the transition between a temperate Mediterranean climate in the Levant to hyper-arid sub-tropical deserts in the southern part of the Arabian Peninsula (AP), with the complex alpine topography in the northeast feeding the Euphrates and Tigris rivers which support life in the Southeastern Fertile Crescent (FC). Climate projections predict severe drying in several parts of the ME in response to global warming, making it important to understand the controls of hydro-climate perturbations in the region. Here we discuss 23 ME speleothem stable oxygen isotope (δ¹⁸Occ) records from 16 sites from the SISAL_v1 database (Speleothem Isotope Synthesis and Analysis database), which provide a record of past hydro-climatic variability. Sub-millennial changes in ME δ¹⁸Occ values primarily indicate changes in past precipitation amounts the result of the main synoptic pattern in the region, specifically Mediterranean cyclones. This pattern is superimposed on change in vapor source δ¹⁸O composition. The coherency (or lack thereof) between regional records is reviewed from Pleistocene to present, covering the Last Glacial Maximum (~22 ka), prominent events during deglaciation, and the transition into the Holocene. The available δ¹⁸Occ time-series are investigated by binning and normalizing at 25-year and 200-year time windows over the Holocene. Important climatic oscillations in the Holocene are discussed, such as the 8.2 ka, 4.2 ka and 0.7 ka (the Little Ice Age) Before Present events. Common trends in the normalized anomalies are tested against different climate archives. Finally, recommendations for future speleothem-based research in the region are given along with comments on the utility and completeness of the SISAL database. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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21 pages, 7267 KiB

Open AccessReview

Late Quaternary Variations in the South American Monsoon System as Inferred by Speleothems—New Perspectives Using the SISAL Database

by Michael Deininger, Brittany Marie Ward, Valdir F. Novello and Francisco W. Cruz

Quaternary 2019, 2(1), 6; https://doi.org/10.3390/quat2010006 - 28 Jan 2019

Cited by 33 | Viewed by 6392

Abstract

Here we present an overview of speleothem δ¹⁸O records from South America, most of which are available in the Speleothem Isotopes Synthesis and Analysis (SISAL_v1) database. South American tropical and subtropical speleothem δ¹⁸O time series are primarily interpreted to reflect changes in precipitation amount, the amount effect, and consequently history of convection intensity variability of convergence zones such as the Intertropical Convergence Zone (ITCZ) and the South America Monsoon System (SAMS). We investigate past hydroclimate scenarios in South America related to the South American Monsoon System in three different time periods: Late Pleistocene, Holocene, and the last two millennia. Precession driven summertime insolation is the main driver of convective variability over the continent during the last 120 kyrs (from present day to 120 kyrs BP), including the Holocene. However, there is a dipole between speleothem δ¹⁸O records from western and eastern South America. Records located in the central region of Brazil are weakly affected by insolation-driven variability, and instead are more susceptible to the variability associated with the South Atlantic Convergence Zone (SACZ). Cold episodic events in the Northern Hemisphere, such as Heinrich and Bond Events, and the Little Ice Age, increase the convective activity of the SAMS, resulting in increased precipitation amount in South America. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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33 pages, 5196 KiB

Open AccessFeature PaperReview

Speleothem Paleoclimatology for the Caribbean, Central America, and North America

by Jessica L. Oster, Sophie F. Warken, Natasha Sekhon, Monica M. Arienzo and Matthew Lachniet

Quaternary 2019, 2(1), 5; https://doi.org/10.3390/quat2010005 - 28 Jan 2019

Cited by 23 | Viewed by 7346

Abstract

Speleothem oxygen isotope records from the Caribbean, Central, and North America reveal climatic controls that include orbital variation, deglacial forcing related to ocean circulation and ice sheet retreat, and the influence of local and remote sea surface temperature variations. Here, we review these records and the global climate teleconnections they suggest following the recent publication of the Speleothem Isotopes Synthesis and Analysis (SISAL) database. We find that low-latitude records generally reflect changes in precipitation, whereas higher latitude records are sensitive to temperature and moisture source variability. Tropical records suggest precipitation variability is forced by orbital precession and North Atlantic Ocean circulation driven changes in atmospheric convection on long timescales, and tropical sea surface temperature variations on short timescales. On millennial timescales, precipitation seasonality in southwestern North America is related to North Atlantic climate variability. Great Basin speleothem records are closely linked with changes in Northern Hemisphere summer insolation. Although speleothems have revealed these critical global climate teleconnections, the paucity of continuous records precludes our ability to investigate climate drivers from the whole of Central and North America for the Pleistocene through modern. This underscores the need to improve spatial and temporal coverage of speleothem records across this climatically variable region. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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33 pages, 7171 KiB

Open AccessFeature PaperReview

A Window into Africa’s Past Hydroclimates: The SISAL_v1 Database Contribution

by Kerstin Braun, Carole Nehme, Robyn Pickering, Mike Rogerson and Nick Scroxton

Quaternary 2019, 2(1), 4; https://doi.org/10.3390/quat2010004 - 23 Jan 2019

Cited by 17 | Viewed by 6249

Abstract

Africa spans the hemispheres from temperate region to temperate region and has a long history of hominin evolution. Although the number of Quaternary palaeoclimatic records from the continent is increasing, much of the history of spatial and temporal climatic variability is still debated. Speleothems, as archives of terrestrial hydroclimate variability, can help reveal this history. Here we review the progress made to date, with a focus on the first version of the Speleothem Isotopes Synthesis and AnaLysis (SISAL) database. The geology of Africa has limited development of large karst regions to four areas: along the northern coast bordering the Mediterranean, eastern Africa and the Horn of Africa, southwestern Africa and southern Africa. Exploitation of the speleothem palaeoclimate archives in these regions is uneven, with long histories of research, e.g., in South Africa, but large areas with no investigations such as West Africa. Consequently, the evidence of past climate change reviewed here is irregularly sampled in both time and space. Nevertheless, we show evidence of migration of the monsoon belt, with enhanced rainfall during interglacials observed in northeast Africa, southern Arabia and the northern part of southern Africa. Evidence from eastern Africa indicates significant decadal and centennial scale rainfall variability. In northwestern and southern Africa, precession and eccentricity influence speleothem growth, largely through changing synoptic storm activity. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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30 pages, 5351 KiB

Open AccessFeature PaperReview

The Potential of Speleothems from Western Europe as Recorders of Regional Climate: A Critical Assessment of the SISAL Database

by Franziska A. Lechleitner, Sahar Amirnezhad-Mozhdehi, Andrea Columbu, Laia Comas-Bru, Inga Labuhn, Carlos Pérez-Mejías and Kira Rehfeld

Quaternary 2018, 1(3), 30; https://doi.org/10.3390/quat1030030 - 7 Dec 2018

Cited by 34 | Viewed by 8234

Abstract

Western Europe is the region with the highest density of published speleothem δ¹⁸O (δ¹⁸O_spel) records worldwide. Here, we review these records in light of the recent publication of the Speleothem Isotopes Synthesis and AnaLysis (SISAL) database. We investigate how representative the spatial and temporal distribution of the available records is for climate in Western Europe and review potential sites and strategies for future studies. We show that spatial trends in precipitation δ¹⁸O are mirrored in the speleothems, providing means to better constrain the factors influencing δ¹⁸O_spel at a specific location. Coherent regional δ¹⁸O_spel trends are found over stadial-interstadial transitions of the last glacial, especially in high altitude Alpine records, where this has been attributed to a strong temperature control of δ¹⁸O_spel. During the Holocene, regional trends are less clearly expressed, due to lower signal-to-noise ratios in δ¹⁸O_spel, but can potentially be extracted with the use of statistical methods. This first assessment highlights the potential of the European region for speleothem palaeoclimate reconstruction, while underpinning the importance of knowing local factors for a correct interpretation of δ¹⁸O_spel. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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25 pages, 7598 KiB

Open AccessReview

The Indian Summer Monsoon from a Speleothem δ¹⁸O Perspective—A Review

by Nikita Kaushal, Sebastian F. M. Breitenbach, Franziska A. Lechleitner, Ashish Sinha, Vinod C. Tewari, Syed Masood Ahmad, Max Berkelhammer, Shraddha Band, Madhusudan Yadava, Rengaswamy Ramesh and Gideon M. Henderson

Quaternary 2018, 1(3), 29; https://doi.org/10.3390/quat1030029 - 7 Dec 2018

Cited by 45 | Viewed by 9937

Abstract

As one of the most prominent seasonally recurring atmospheric circulation patterns, the Asian summer monsoon (ASM) plays a vital role for the life and livelihood of about one-third of the global population. Changes in the strength and seasonality of the ASM significantly affect the ASM region, yet the drivers of change and the varied regional responses of the ASM are not well understood. In the last two decades, there were a number of studies reconstructing the ASM using stalagmite-based proxies such as oxygen isotopes (δ¹⁸O). Such reconstructions allow examination of ASM drivers and responses, increasing monsoon predictability. In this review paper, we focus on stalagmite δ¹⁸O records from India at the proximal end of the ASM region. Indian stalagmite δ¹⁸O records show well-dated, high-amplitude changes in response to the dominant drivers of the ASM on orbital to multi-centennial timescales, and indicate the magnitude of monsoon variability in response to these drivers. We examine Indian stalagmite records collated in the Speleothem Isotope Synthesis and AnaLysis version 1 (SISAL_v1) database (http://researchdata.reading.ac.uk/139/) and support the database with a summary of record quality and regional climatic interpretations of the δ¹⁸O record during different climate states. We highlight current debates and suggest the most useful time periods (climatic events) and locations for further work using tools such as data-model comparisons, spectral analysis methods, multi-proxy investigations, and monitoring. Full article

(This article belongs to the Special Issue Speleothem Records and Climate)

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