Millennial-scale climatic cycles in the Early Pliocene pollen record of Ptolemais, northern Greece

Hoeve, M.L. Kloosterboer-van; Steenbrink, J.; Visscher, Henk; Brinkhuis, Henk

doi:10.1016/j.palaeo.2005.07.002

Cited by 30 publications

(17 citation statements)

References 58 publications

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“…In older records, the heliomagnetic origin is inferred from the correspondence in time between the recorded period and an ~2.4 k.y. period in the Pliocene (Kloosterboer-van Hoeve et al, 2006), Miocene (Kern et al, 2013), Eocene (Lenz et al, 2017), Permian (Franco et al, 2012), and Devonian (this work; Elrick and Hinnov, 2007).…”

Section: Discussionmentioning

confidence: 71%

Millennial-scale climate changes manifest Milankovitch combination tones and Hallstatt solar cycles in the Devonian greenhouse world

Silva

Dekkers

Vleeschouwer

et al. 2018

Geology

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Sub-Milankovitch rhythmic features in sedimentary records have been reported from throughout geological time. However, their origin remains enigmatic, in particular during so-called greenhouse periods in Earth's history. To better understand such short-term climatic changes, we sampled two 3-m-thick intervals of early Devonian hemipelagic carbonate at 1 cm resolution in the Pod Barrandovem section (Czech Republic). Greenhouse conditions prevailed during early Devonian times, and the chosen resolution enables the detection of millennial-scale climate change as recorded by elemental abundances. We used a previously published astrochronology for the section to transform the studied series from the stratigraphic into the time domain. Spectral analysis of the time-calibrated log-transformed Ti records reveal obliquity and precession cycles, confirming the applied astrochronology. Additional spectral peaks with periods of 2.3-2.7, 6-8, and 10-12 k.y. appear in both records. Furthermore, a 1.5 k.y. periodicity, close to the Pleistocene Dansgaard-Oeschger oscillation, is also identified, but only in the record with higher accumulation rate (~3.5 cm/k.y.). Bi-coherence spectra reveal that the 6-8 and 10-12 k.y. periodic components are combination tones of Milankovitch cycles. We infer the shorter ~2.5 k.y. periodicity to be the result of solar forcing, related to the Hallstatt cycle. These new observations strengthen the case for an external origin of millennial-scale features.

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Section: Discussionmentioning

confidence: 71%

Millennial-scale climate changes manifest Milankovitch combination tones and Hallstatt solar cycles in the Devonian greenhouse world

Silva

Dekkers

Vleeschouwer

et al. 2018

Geology

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“…There has been much geological evidence of millennium-scale cycles, from North America to Europe and from the Middle East to East Asia. A 1500 a cycle was found in deep-sea sediment records for the North Atlantic [3], lake sediment records for Alaska [1], pollen records for the Ptolemais basin, Greece [38], loess records for Jiuzhoutai, China [39] and sea surface temperature records for the North Pacific at mid-latitudes [40]. 1450 and 1150 a cycles were detected for the 74K1 hole in the Arabian Sea [41].…”

Section: Periodicity Of Temperature Variationmentioning

confidence: 99%

Amplitudes, rates, periodicities and causes of temperature variations in the past 2485 years and future trends over the central-eastern Tibetan Plateau

et al. 2011

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Amplitudes, rates, periodicities, causes and future trends of temperature variations based on tree rings for the past 2485 years on the central-eastern Tibetan Plateau were analyzed. The results showed that extreme climatic events on the Plateau, such as the Medieval Warm Period, Little Ice Age and 20th Century Warming appeared synchronously with those in other places worldwide. The largest amplitude and rate of temperature change occurred during the Eastern Jin Event (343-425 AD), and not in the late 20th century. There were significant cycles of 1324 a, 800 a, 199 a, 110 a and 2-3 a in the 2485-year temperature series. The 1324 a, 800 a, 199 a and 110 a cycles are associated with solar activity, which greatly affects the Earth surface temperature. The long-term trends (>1000 a) of temperature were controlled by the millennium-scale cycle, and amplitudes were dominated by multi-century cycles. Moreover, cold intervals corresponded to sunspot minimums. The prediction indicated that the temperature will decrease in the future until to 2068 AD and then increase again. central-eastern

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“…Anatolinites dongyingensis (Ke & Shi, 1978) Elsik et al, 1990 Brachysporisporites catinus (Elsik & Jansonius, 1974) Kalgutkar & Jansonius, 2000Dicellaesporites inaequabilis Martínez-Hernández & Tomasini-Ortiz, 1989 Dicellaesporites keralensis Kumar, 1990Dictyosporites morularis (Salard-Cheboldaeff & Locquin, 1980) Kalgutkar & Jansonius, 2000Dictyosporites moruloides (Salard-Cheboldaeff & Locquin, 1980 Kalgutkar & Jansonius, 2000 Dyadosporites bhardwaji (Varma & Rawat, 1963) Kalgutkar & Jansonius, 2000 Dyadosporites reticulatus (Ramanujam & Rao, 1979) Kalgutkar & Jansonius, 2000Dyadosporites solidus (Ke & Shi, 1978) Song in Song et al, 1999 Exesisporites annulatus Kalgutkar, 1993 Exesisporites neogenicus Elsik, 1969Inapertisporites circularis (Sheffy & Dilcher, 1971) Kalgutkar & Jansonius, 2000Inapertisporites communis Song & Li in Song et al, 1989 Meliolinites nivalis Selkirk, 1975Monoporisporites macrosporus (Salard-Cheboldaeff & Locquin, 1980 Kalgutkar & Jansonius, 2000 Monoporisporites traversii (Ediger & Alisan, 1989) Kalgutkar & Jansonius, 2000Palaeoamphisphaerella pirozynskii Ramanujam & Srisailam, 1980 Papulosporonites enormis (Ediger, 1981) Kalgutkar & Jansonius, 2000 Paragranatisporites vermiculus (Ediger, 1981 remains is interpreted as an indication of the prevalence of a humid climate in the area of deposition (Singh & Chauhan, 2008). In addition, changes in diversity and relative abundance of fungal palynomorphs can reflect palaeoclimatic as well as other palaeoenvironmental changes/fluctuations (Elsik, 1996;Kloosterboer-van Hoeve et al, 2006).…”

Section: Palaeoenvironmental Interpretationmentioning

confidence: 99%

A fungal proliferation near the probable Oligocene/Miocene boundary, Nukhul Formation, Gulf of Suez, Egypt

Atfy

Brocke

Uhl

2013

J. Micropalaeontol.

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Abstract. Moderately to well-preserved palynomorph assemblages were recorded from thirty samples of the Nukhul Formation (GH 404-2A Well), southern Gulf of Suez, Egypt. The taxa are dominated by highly diverse fungi, freshwater algae (e.g. Botryococcus, Pediastrum) beside a sparse record of spores and pollen. Marine palynomorphs, such as dinoflagellate cysts (dinocysts), are very rare. The stratigraphy and age of the Nukhul Formation is highly debated due to lack of diagnostic fossils (e.g. foraminifera, nannoplankton). It has been referred mostly to the Early Miocene; however, some recent publications interpret it as being of latest Oligocene–Early Miocene age. A prominent fungal proliferation composed of diverse and moderately well-preserved fungal spores, fungal fragments, fructifications and hyphae is recorded. This fungi-rich interval occurs mainly from 11370 to 11430 ft in the GH 404-2A Well. Such an observation has not been noted previously within the Nukhul Formation or its stratigraphic equivalents in Egypt. This putative ‘eco-event’ is probably associated with the well-known eustatic sea-level fall in the latest Chattian to early Aquitanian or at the Oligocene/Miocene boundary (OMB). It also seems possible that it may represent a more local event related to the rifting of the Gulf of Suez during this period. The high diversity of fossil fungi is interpreted herein as an indication of an episodic prevalence of humid climate at the end of a regressive phase, as also indicated by a lithological change near the top of the Shoab Ali Member of the Nukhul Formation. In addition, the co-occurrence of freshwater algae, mainly Botryococcus and Pediastrum, together with some aquatic fungal genera, such as Involutisporonites, Paragrantisporites, Quilonia, Striadiporites and Reduviasporonites, suggests the temporary existence of shallow, pond- or lake-like aquatic habitats, possibly related to tectonic activity.

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Millennial-scale climatic cycles in the Early Pliocene pollen record of Ptolemais, northern Greece

Cited by 30 publications

References 58 publications

Millennial-scale climate changes manifest Milankovitch combination tones and Hallstatt solar cycles in the Devonian greenhouse world

Millennial-scale climate changes manifest Milankovitch combination tones and Hallstatt solar cycles in the Devonian greenhouse world

Amplitudes, rates, periodicities and causes of temperature variations in the past 2485 years and future trends over the central-eastern Tibetan Plateau

A fungal proliferation near the probable Oligocene/Miocene boundary, Nukhul Formation, Gulf of Suez, Egypt

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