2005
Tarasov, P. E.; Granoszewski, W.; Bezrukova, E.; Brewer, S.; Nita, M.; Abzaeva, A.; Oberhänsli, H.
Quantitative reconstruction of the last interglacial vegetation and climate based on the pollen record from Lake Baikal, Russia Journal Article
In: Climate Dynamics, vol. 25, no. 6, pp. 625-637, 2005, ISSN: 09307575, (81).
@article{2-s2.0-27744601428,
title = {Quantitative reconstruction of the last interglacial vegetation and climate based on the pollen record from Lake Baikal, Russia},
author = { P.E. Tarasov and W. Granoszewski and E. Bezrukova and S. Brewer and M. Nita and A. Abzaeva and H. Oberhänsli},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-27744601428&doi=10.1007%2fs00382-005-0045-0&partnerID=40&md5=acc1f3920e96e7c973973f2a7f038fc3},
doi = {10.1007/s00382-005-0045-0},
issn = {09307575},
year = {2005},
date = {2005-01-01},
journal = {Climate Dynamics},
volume = {25},
number = {6},
pages = {625-637},
abstract = {Changes in mean temperature of the coldest (Tc) and warmest month (Tw), annual precipitation (Pann) and moisture index (α) were reconstructed from a continuous pollen record from Lake Baikal, Russia. The pollen sequence CON01-603-2 (53°57′N; 108°54′E) was recovered from a 386 m water depth in the Continent Ridge and dated to ca. 130-114.8 ky BP. This time interval covers the complete last interglacial (LI), corresponding to MIS 5e. Results of pollen analysis and pollen-based quantitative biome reconstruction show pronounced changes in the regional vegetation throughout the record. Shrubby tundra covered the area at the beginning of MIS 5e (ca. 130-128 ky), consistent with the end of the Middle Pleistocene glaciation. The late glacial climate was characterised by low winter and summer temperatures (Tc ∼ -38 to -35°C and Tw∼11-13°C) and low annual precipitation (Pann∼300 mm). However, the wide spread of tundra vegetation suggests rather moist environments associated with low temperatures and evaporation (reconstructed α∼1). Tundra was replaced by boreal conifer forest (taiga) by ca. 128 ky BP, suggesting a transition to the interglacial. Taiga-dominant phase lasted until ca. 117.4 ky BP, e.g. about 10 ky. The most favourable climate conditions occurred during the first half of the LI. Pann reached 500 mm soon after 128 ky BP. However, temperature changed more gradually. Maximum values of Tc ∼-20°C and Tw ∼16-17°C are reconstructed from about 126 ky BP. Conditions became gradually colder after ca. 121 ky BP. Tc dropped to ∼ -27°C and T w to ∼15°C by 119.5 ky BP. The reconstructed increase in continentality was accompanied by a decrease in Pann to ∼400-420 mm. However, the climate was still humid enough (α∼0.9) to support growth of boreal evergreen conifers. A sharp turn towards a dry climate is reconstructed after ca. 118 ky BP, causing retreat of forest and spread of cool grass-shrub communities. Cool steppe dominated the vegetation in the area between ca. 117.5 ky and 114.8 ky BP, suggesting the end of the interglacial and transition to the last glacial (MIS 5d). Shift to the new glaciation was characterised by cool and very dry conditions with Tc ∼ -28 to -30°C, Tw ∼14-15°C, Pann ∼250 mm and α∼0.5. © Springer-Verlag 2005.},
note = {81},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Changes in mean temperature of the coldest (Tc) and warmest month (Tw), annual precipitation (Pann) and moisture index (α) were reconstructed from a continuous pollen record from Lake Baikal, Russia. The pollen sequence CON01-603-2 (53°57′N; 108°54′E) was recovered from a 386 m water depth in the Continent Ridge and dated to ca. 130-114.8 ky BP. This time interval covers the complete last interglacial (LI), corresponding to MIS 5e. Results of pollen analysis and pollen-based quantitative biome reconstruction show pronounced changes in the regional vegetation throughout the record. Shrubby tundra covered the area at the beginning of MIS 5e (ca. 130-128 ky), consistent with the end of the Middle Pleistocene glaciation. The late glacial climate was characterised by low winter and summer temperatures (Tc ∼ -38 to -35°C and Tw∼11-13°C) and low annual precipitation (Pann∼300 mm). However, the wide spread of tundra vegetation suggests rather moist environments associated with low temperatures and evaporation (reconstructed α∼1). Tundra was replaced by boreal conifer forest (taiga) by ca. 128 ky BP, suggesting a transition to the interglacial. Taiga-dominant phase lasted until ca. 117.4 ky BP, e.g. about 10 ky. The most favourable climate conditions occurred during the first half of the LI. Pann reached 500 mm soon after 128 ky BP. However, temperature changed more gradually. Maximum values of Tc ∼-20°C and Tw ∼16-17°C are reconstructed from about 126 ky BP. Conditions became gradually colder after ca. 121 ky BP. Tc dropped to ∼ -27°C and T w to ∼15°C by 119.5 ky BP. The reconstructed increase in continentality was accompanied by a decrease in Pann to ∼400-420 mm. However, the climate was still humid enough (α∼0.9) to support growth of boreal evergreen conifers. A sharp turn towards a dry climate is reconstructed after ca. 118 ky BP, causing retreat of forest and spread of cool grass-shrub communities. Cool steppe dominated the vegetation in the area between ca. 117.5 ky and 114.8 ky BP, suggesting the end of the interglacial and transition to the last glacial (MIS 5d). Shift to the new glaciation was characterised by cool and very dry conditions with Tc ∼ -28 to -30°C, Tw ∼14-15°C, Pann ∼250 mm and α∼0.5. © Springer-Verlag 2005.
Demske, D.; Heumann, G.; Granoszewski, W.; Nita, M.; Mamakowa, K.; Tarasov, P. E.; Oberhänsli, H.
Elsevier B.V., vol. 46, no. 1-4 SPEC. ISS., 2005, ISSN: 09218181, (142).
@proceedings{2-s2.0-18044369710,
title = {Late glacial and Holocene vegetation and regional climate variability evidenced in high-resolution pollen records from Lake Baikal},
author = { D. Demske and G. Heumann and W. Granoszewski and M. Nita and K. Mamakowa and P.E. Tarasov and H. Oberhänsli},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-18044369710&doi=10.1016%2fj.gloplacha.2004.09.020&partnerID=40&md5=785d49d9eecb40f784a367b01ef74845},
doi = {10.1016/j.gloplacha.2004.09.020},
issn = {09218181},
year = {2005},
date = {2005-01-01},
journal = {Global and Planetary Change},
volume = {46},
number = {1-4 SPEC. ISS.},
pages = {255-279},
publisher = {Elsevier B.V.},
abstract = {High-resolution pollen records from Lake Baikal revealed considerable regional differences in the vegetation development and pronounced climate variability during the last glacial-interglacial transition and Holocene. Correlation between cores was successfully based on a chronology constructed from AMS 14C dating of pollen concentrates. Comparison to other radiocarbon-dated pollen sequences from the Baikal region suggests that the chronology presented is very reliable, and thus correlation to other dated events can easily be performed. Pollen indices, which reflect relative changes in major vegetation types and limitations of growing conditions by moisture availability and temperature, demonstrate near-synchronous vegetation changes, which suggest synchronous large-scale climate variation across the Baikal region. Due to the limited influence of human impact in the Lake Baikal region, the pollen data illustrate that, in the continental interior of NE Eurasia Holocene, climate variability was very pronounced. After initial warming and a strong increase in relative moisture (ca. 16 cal ka BP), the Bølling-Allerød-like event was punctuated by three cool and dry events. These events, dated between ca. 15 and 13 cal ka BP, can be compared to coolings as recorded in GISP 2 oxygen isotope records from Greenland ice cores. An expansion of Betula sect. Nanae/Fruticosae, Artemisia and Chenopodiaceae marks the Younger-Dryas (YD)-like cooling event (ca. 12.5-12 cal ka BP). High temperatures and favourable moisture conditions during the first part of Holocene favoured the optimum development of dark coniferous taiga between 11-7.5 cal ka BP in the south and 10-8 cal ka BP in the northeast. A fir and spruce decline in the southern mountains (ca. 9.5-8.5 cal ka BP) can be related to the 8.2 cal ka BP cooling event. The pronounced mid-Holocene cooling event and a transition towards dry conditions (ca. 8-7 cal ka BP) preceded the nearly synchronous regional expansion of pine taiga. Maximum distribution of Scots pine forests marks the Holocene thermal optimum (ca. 6.5-5.7 cal ka BP), which was followed by two subsequent cooling events (ca. 5.5-4.5 cal ka BP) at the Atlantic-Subboreal transition. A subsequent temperature optimum in the southeastern Baikal region ended with pronounced cooling during the Subboreal-Subatlantic transition (ca. 3-2.5 cal ka BP). A late spread of shrub alders may evidence the beginning of the Little Ice Age. © 2004 Elsevier B.V. All rights reserved.},
note = {142},
keywords = {},
pubstate = {published},
tppubtype = {proceedings}
}
High-resolution pollen records from Lake Baikal revealed considerable regional differences in the vegetation development and pronounced climate variability during the last glacial-interglacial transition and Holocene. Correlation between cores was successfully based on a chronology constructed from AMS 14C dating of pollen concentrates. Comparison to other radiocarbon-dated pollen sequences from the Baikal region suggests that the chronology presented is very reliable, and thus correlation to other dated events can easily be performed. Pollen indices, which reflect relative changes in major vegetation types and limitations of growing conditions by moisture availability and temperature, demonstrate near-synchronous vegetation changes, which suggest synchronous large-scale climate variation across the Baikal region. Due to the limited influence of human impact in the Lake Baikal region, the pollen data illustrate that, in the continental interior of NE Eurasia Holocene, climate variability was very pronounced. After initial warming and a strong increase in relative moisture (ca. 16 cal ka BP), the Bølling-Allerød-like event was punctuated by three cool and dry events. These events, dated between ca. 15 and 13 cal ka BP, can be compared to coolings as recorded in GISP 2 oxygen isotope records from Greenland ice cores. An expansion of Betula sect. Nanae/Fruticosae, Artemisia and Chenopodiaceae marks the Younger-Dryas (YD)-like cooling event (ca. 12.5-12 cal ka BP). High temperatures and favourable moisture conditions during the first part of Holocene favoured the optimum development of dark coniferous taiga between 11-7.5 cal ka BP in the south and 10-8 cal ka BP in the northeast. A fir and spruce decline in the southern mountains (ca. 9.5-8.5 cal ka BP) can be related to the 8.2 cal ka BP cooling event. The pronounced mid-Holocene cooling event and a transition towards dry conditions (ca. 8-7 cal ka BP) preceded the nearly synchronous regional expansion of pine taiga. Maximum distribution of Scots pine forests marks the Holocene thermal optimum (ca. 6.5-5.7 cal ka BP), which was followed by two subsequent cooling events (ca. 5.5-4.5 cal ka BP) at the Atlantic-Subboreal transition. A subsequent temperature optimum in the southeastern Baikal region ended with pronounced cooling during the Subboreal-Subatlantic transition (ca. 3-2.5 cal ka BP). A late spread of shrub alders may evidence the beginning of the Little Ice Age. © 2004 Elsevier B.V. All rights reserved.