Multistage 8.2 kyr event revealed through high‐resolution XRF core scanning of Cuban sinkhole sediments

Peros, Matthew; Collins, Shawn; G'Meiner, Anna Agosta; Reinhardt, Eduard G.; Pupo, Felipe Matos

doi:10.1002/2017gl074369

Cited by 25 publications

(29 citation statements)

References 51 publications

(71 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Higher concentrations of Cl and Br were used to detect increases in salinity caused by regional drying. Palaeoclimate reconstructions from Cenote Jennifer document a multistage 8.2 ka event (Peros et al, 2017) in agreement with greyscale data obtained from Cariaco Basin (Hughen et al, 1996).…”

Section: A C C E P T E Dsupporting

confidence: 84%

See 1 more Smart Citation

Current perspectives on the capabilities of high resolution XRF core scanners

Croudace

Löwemark

Tjallingii

et al. 2019

Quaternary International

View full text Add to dashboard Cite

The introduction and application of high resolution XRF core scanners has made an enormous contribution to palaeoclimate science over the last two decades. These core scanners have become essential analytical tools for the investigation of sedimentary and other natural cumulative records of environmental change. Their widespread adoption by the environmental and geoscience communities has had a significant impact on the ability to systematically record high resolution chemical profiles in marine and lake sediments and soils. The range of applications has broadened beyond sedimentology and palaeoclimatology and now extends into scanning samples of speleothems, corals, mumiyo mounds, rocks, sedimentary nodules, archaeological artefacts, tree sections and melt segregations. Other areas exploiting the capability of XRF core scanners are mineral exploration, geotechnical characterisation, soil remediation studies and carbon capture and storage research. As a consequence of their ability to efficiently determine detailed, non-destructive elemental records in sediments and soils, scientific papers published since the year 2000 now number more than 1000.

show abstract

Section: A C C E P T E Dsupporting

confidence: 84%

“…This approach was applied to a sediment record from the flooded sinkhole of Cenote Jennifer in northern Cuba (Peros et al, 2017). Higher concentrations of Cl and Br were used to detect increases in salinity caused by regional drying.…”

Section: A C C E P T E Dmentioning

confidence: 99%

Current perspectives on the capabilities of high resolution XRF core scanners

Croudace

Löwemark

Tjallingii

et al. 2019

Quaternary International

View full text Add to dashboard Cite

show abstract

“…Zuo et al: The flourishing Early Holocene Pooideae linked to an 8.2 ka cold event Art. 1, page 7 of 14 (Peros et al, 2017), which is likely consistent with multiple freshwater pulses deduced for Agassiz and Ojibway lakes (north America) at higher northern latitudes. In conclusion, the Pooideae assemblage in the Lower Yangtze may have varied in response to changes in the Asian monsoon over the period of the 8.2 ka event, which were themselves closely linked to the North Atlantic climate.…”

Section: Discussionsupporting

confidence: 68%

Phytolith records of flourishing early Holocene Pooideae linked to an 8.2 ka cold event in subtropical China

Zuo

Lü

et al. 2020

Elem Sci Anth

View full text Add to dashboard Cite

The grass subfamily Pooideae originated in a temperate niche during the late Cretaceous; it is the largest Poaceae subfamily, consisting of almost 4,000 species, which are distributed worldwide. Pooideae responses to climate changes at different time scales, and different ecological zones are thus important in understanding Poaceae evolutionary processes and their relationship with climate change. In the study described in this article, we reconstructed Pooideae variability during the early Holocene, as inferred by a phytolith sequence from the Lower Yangtze in subtropical China. The phytolith assemblage was marked by three increases in Pooideae phytoliths, dated to ca 8.4–8.0, 7.8–7.6, and 7.4–7.2 ka BP (before present, 1950 AD), with each representing pronounced increases in Pooideae extent and distribution. All these increases were within age ranges that agreed well with the timing of weak Asian Monsoon events, at 8.2, 7.7, and 7.3 ka BP. The first Pooideae flourishing period in subtropical China was the most significant, lasting for approximately four centuries and being characterized by a double peak, which equated with an event at 8.2 ka. This suggested that cold and/or dry conditions—which occurred over a period of several hundred years and were linked to weakening of the Asian monsoon—probably caused Pooideae to flourish in the Lower Yangtze region. Comparison of two diagnostic trapezoid phytolith types—namely wavy and wavy narrow—which showed different changes between ca 8.4 and 8.0 ka BP, suggested that they responded differently to the climate change represented by the 8.2 ka event. Our phytolith records have provided not only new data clarifying the detailed Pooideae response to the 8.2 ka event but also a reliable index for past cold climates in subtropical China.

show abstract

“…Proxy climate records from the Caribbean region (Peros et al, 2017) and Central America (Lachniet et al, 2004) suggest lower precipitation and higher evaporation during the 8.2 ka event, which could have led to increased lake water salinity. Our sedimentological and micropaleontological results, however, indicate rapid expansion and deepening of the lake, and other studies found that regional precipitation in the Lake Izabal catchment increased at that time (Winter et al, 2020;Duarte et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

New estimates of the magnitude of the sea-level jump during the 8.2 ka event

Obrist‐Farner

Brenner

Stone

et al. 2021

Geology

View full text Add to dashboard Cite

We analyzed sediment cores from coastal Lake Izabal, Guatemala, to infer Holocene biogeochemical changes in the lake. At ca. 8370 calibrated yr B.P. (cal. yr B.P.), marine waters entered the lake, which presently lies ~38 km from the Caribbean coast. Temporal correlation between Early Holocene drainage of high-latitude Lakes Agassiz and Ojibway (in North America) and marine flooding of Lake Izabal suggests a causal link between the two processes. Our data indicate a relative sea-level jump of 2.60 ± 0.88 m, which is larger than previous estimates of sea-level rise during the 8.2 ka event. The inferred sea-level jump, however, cannot be explained solely by the volume of water released during drainage of Lakes Agassiz and Ojibway. Instead, we propose that previous studies underestimated the magnitude of Lakes Agassiz and Ojibway discharge, or that additional meltwater sources contributed to global sea-level rise at that time.

show abstract

Multistage 8.2 kyr event revealed through high‐resolution XRF core scanning of Cuban sinkhole sediments

Cited by 25 publications

References 51 publications

Current perspectives on the capabilities of high resolution XRF core scanners

Current perspectives on the capabilities of high resolution XRF core scanners

Phytolith records of flourishing early Holocene Pooideae linked to an 8.2 ka cold event in subtropical China

New estimates of the magnitude of the sea-level jump during the 8.2 ka event

Contact Info

Product

Resources

About