Late Holocene climate and environmental changes in Kamchatka inferred from the subfossil chironomid record

Nazarova, Larisa; Hoog, V. De; Hoff, Ulrike; Dirksen, Oleg; Diekmann, Bernhard

doi:10.1016/j.quascirev.2013.01.018

Cited by 53 publications

(62 citation statements)

References 55 publications

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“…ash layers) and radiocarbon data (two dates confirming each other). Further information about the age model is discussed in detail in Nazarova et al (2013) and Hoff et al (this issue). Water samples were taken with a 1.5-liter UWITEC water sampler from the surface and in two depth profiles (PG1852-2; PG1861-1) in the middle of Two-Yurts Lake (Table 1).…”

Section: K a M C H A T K Amentioning

confidence: 99%

“…Chironomid analyses (Nazarova et al, 2013) at TYL provide additional insight about the likeliness of δ 18 O prec being the most relevant control for the δ…”

Section: Chironomidsmentioning

confidence: 99%

“…One main objective of the KALMAR project is to infer Late Quaternary climate change on Kamchatka on the basis of palaeolimnological records (Nazarova et al, 2013;Hoff et al, this issue).…”

Section: Introductionmentioning

confidence: 99%

“…TYL sediments consist of diatom-rich oozes (interrupted by a few tephra layers) dominated by only a few diatom species (Hoff et al, this issue) yielding sufficiently high-purity diatom samples for oxygen isotope analyses. Additionally, diatom taxonomy and palynology (Hoff et al, this issue) as well as chironomids (Nazarova et al, 2013) were studied in parallel. Hence, the main aim of this study is to use diatom isotope signals of Two-Yurts Lake for Holocene palaeoenvironmental reconstruction, interpreted in comparison to local sedimentological, pollen and diatom assemblage data as well as to findings from TYL chironomid analyses as an independent temperature proxy.…”

Section: Introductionmentioning

confidence: 99%

“…Stable oxygen isotope composition of diatoms from Two-Yurts Lake (grey dashed line: raw data; black: final data corrected for contamination). Diatom isotope data is compared to the diatom concentration and main diatom species composition as well as July air temperatures reconstructed from chironomids at TYL (Nazarova et al, 2013). Grey-dashed contour lines give the reconstructed minimum and maximum T July .…”

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confidence: 99%

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Oxygen isotope composition of diatoms as Late Holocene climate proxy at Two-Yurts Lake, Central Kamchatka, Russia

Meyer

Chapligin

Hoff

et al. 2015

Global and Planetary Change

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Especially in combination with other proxies, the oxygen isotope composition of diatom silica (δ 18 O diatom ) from lake sediments is useful for interpreting past climate conditions. This paper presents the first oxygen isotope data of fossil diatoms from Kamchatka, Russia, derived from sediment cores from Two-Yurts Lake (TYL). For reconstructing Late Holocene climate change, palaeolimnological investigations also included diatom, pollen and chironomid analysis. The most recent diatom sample (δ 18 O diatom = +23.3‰) corresponds well with the present day isotopic composition of the TYL water (mean δ 18 O = −14.8‰) displaying a reasonable isotope fractionation in the system silicawater. Nonetheless, the TYL δ 18 O diatom record is mainly controlled by changes in the isotopic composition of the lake water. TYL is considered as a dynamic system triggered by differential environmental changes closely linked with lake-internal hydrological factors. The diatom silica isotope record displays large variations in δ 18O diatom from +27.3‰ to +23.3‰ from about 4.5 kyr BP until today. A continuous depletion in δ 18O diatom of 4.0‰ is observed in the past 4.5 kyr, which is in good accordance with other hemispheric environmental changes (i.e. a summer insolation-driven Mid-to Late Holocene cooling). The overall cooling trend is superimposed by regional hydrological and atmospheric-oceanic changes. These are related to the interplay between Siberian High and Aleutian Low as well as to the ice dynamics in the Sea of Okhotsk. Additionally, combined δ 18O diatom and chironomid interpretations provide new information on changes related to meltwater input to lakes. Hence, this diatom isotope study provides further insight into hydrology and climate dynamics of this remote, rarely investigated area.

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Section: K a M C H A T K Amentioning

confidence: 99%

“…Chironomid analyses (Nazarova et al, 2013) at TYL provide additional insight about the likeliness of δ 18 O prec being the most relevant control for the δ…”

Section: Chironomidsmentioning

confidence: 99%

“…One main objective of the KALMAR project is to infer Late Quaternary climate change on Kamchatka on the basis of palaeolimnological records (Nazarova et al, 2013;Hoff et al, this issue).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Oxygen isotope composition of diatoms as Late Holocene climate proxy at Two-Yurts Lake, Central Kamchatka, Russia

Meyer

Chapligin

Hoff

et al. 2015

Global and Planetary Change

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Late Quaternary paleoenvironmental reconstructions from sediments of Lake Emanda (Verkhoyansk Mountains, East Siberia)

Andreev

Nazarova

Lenz

et al. 2022

J Quaternary Science

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Continuous pollen and chironomid records from Lake Emanda (65°17′N, 135°45′E) provide new insights into the Late Quaternary environmental history of the Yana Highlands (Yakutia). Larch forest with shrubs (alders, pines, birches) dominated during the deposition of the lowermost sediments suggesting its Early Weichselian [Marine Isotope Stage (MIS) 5] age. Pollen‐ and chironomid‐based climate reconstructions suggest July temperatures (TJuly) slightly lower than modern. Gradually increasing amounts of herb pollen and cold stenotherm chironomid head capsules reflect cooler and drier environments, probably during the termination of MIS 5. TJuly dropped to 8 °C. Mostly treeless vegetation is reconstructed during MIS 3. Tundra and steppe communities dominated during MIS 2. Shrubs became common after ~14.5 ka bp but herb‐dominated habitats remained until the onset of the Holocene. Larch forests with shrub alder and dwarf birch dominated after the Holocene onset, ca. 11.7 ka bp. Decreasing amounts of shrub pollen during the Lateglacial are assigned to the Older Dryas and Younger Dryas with TJuly ~ 7.5 °C. TJuly increased up to 13 °C. Shrub stone pine was present after ~7.5 ka bp. The vegetation has been similar to modern since ca. 5.8 ka bp. Chironomid diversity and concentration in the sediments increased towards the present day, indicating the development of richer hydrobiological communities in response to the Holocene thermal maximum.

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Volcanoes of Kamchatka, Russia

Claudino-Sales

2018

Coastal World Heritage Sites

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Late Holocene climate and environmental changes in Kamchatka inferred from the subfossil chironomid record

Cited by 53 publications

References 55 publications

Oxygen isotope composition of diatoms as Late Holocene climate proxy at Two-Yurts Lake, Central Kamchatka, Russia

Oxygen isotope composition of diatoms as Late Holocene climate proxy at Two-Yurts Lake, Central Kamchatka, Russia

Late Quaternary paleoenvironmental reconstructions from sediments of Lake Emanda (Verkhoyansk Mountains, East Siberia)

Volcanoes of Kamchatka, Russia

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