Helmens, Karin; Bergman, Jonas; Engels, Stefan; Kaislahti, Päivi; Shala, Shyhrete; Väliranta, Minna (2025): Pollen counts from borehole Sokli B series in Sokli (Finland) in 2002 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983422
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Published: 2025-07-01 • DOI registered: 2025-08-14
Abstract:
This dataset provides the pollen counts for the Early Weichselian sediment sequence retrieved from Sokli (Finland) in 2002. Counts per pollen taxon are presented against sediment depth (m). Non-pollen palynomorphs (NPPs) were also counted from the pollen slides and these data are presented alongside the pollen counts. The number of Lycopodium spores encountered during analysis are also presented ("exotic"). The pollen dataset provides information on terrestrial and aquatic/telmatic vegetation dynamics (Helmens et al., 2012). A total of 63 samples was analysed, with samples prepared following Fægri & Iversen (1989) with additional sodium polytungstate heavy-liquid separation to remove clastic material. The material was sieved over a 7-8 mm nylon mesh to remove fine particles, mounted in glycerine jelly and sealed with paraffin wax. Fossils were counted using a light microscope (400× magnification). The samples were prepared in the laboratories of VU University Amsterdam, The Netherlands, and counted in the laboratories of Stockholm University, Sweden.
Keyword(s):
Related to:
Engels, Stefan; Helmens, Karin F; Väliranta, Minna; Brooks, Stephen J; Birks, H John B (2010): Early Weichselian (MIS 5d and 5c) temperatures and environmental changes in northern Fennoscandia as recorded by chironomids and macroremains at Sokli, northeast Finland. Boreas, 39(4), 689-704, https://doi.org/10.1111/j.1502-3885.2010.00163.x
Helmens, Karin F; Väliranta, Minna; Engels, Stefan; Shala, Shyhrete (2012): Large shifts in vegetation and climate during the Early Weichselian (MIS 5d-c) inferred from multi-proxy evidence at Sokli (northern Finland). Quaternary Science Reviews, 41, 22-38, https://doi.org/10.1016/j.quascirev.2012.02.008
References:
Faegri, K; Iversen, J (1989): Textbook of pollen analysis. John Wiley & Sons., New York, US, fourth edition
Väliranta, Minna; Birks, Hilary H; Helmens, Karin; Engels, Stefan; Piirainen, Mikko (2009): Early Weichselian interstadial (MIS 5c) summer temperatures were higher than today in northern Fennoscandia. Quaternary Science Reviews, 28(9-10), 777-782, https://doi.org/10.1016/j.quascirev.2009.01.004
Coverage:
Latitude: 67.800278 * Longitude: 29.300278
Date/Time Start: 2002-04-15T08:00:00 * Date/Time End: 2002-04-18T18:00:00
Minimum DEPTH, sediment/rock: 13.45 m * Maximum DEPTH, sediment/rock: 19.30 m
Event(s):
Comment:
The funding was provided by Swedish Nuclear Fuel and Waste Management Company (SKB) and Bolin Centre for Climate Research (Stockholm University).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Helmens, Karin | Geocode | |
| 2 | Ulmus | Ulm | # | Helmens, Karin | see description in data abstract | |
| 3 | Quercus | Que | # | Helmens, Karin | see description in data abstract | |
| 4 | Corylus | Cor | # | Helmens, Karin | see description in data abstract | |
| 5 | Tilia | Til | # | Helmens, Karin | see description in data abstract | |
| 6 | Fraxinus | Frx | # | Helmens, Karin | see description in data abstract | |
| 7 | Carpinus | Car | # | Helmens, Karin | see description in data abstract | |
| 8 | Betula pubescens/Betula pendula | B. pubescens/B. pendula | # | Helmens, Karin | see description in data abstract | |
| 9 | Alnus | Aln | # | Helmens, Karin | see description in data abstract | |
| 10 | Pinus | Pin | # | Helmens, Karin | see description in data abstract | |
| 11 | Picea | Pic | # | Helmens, Karin | see description in data abstract | |
| 12 | Larix | Lar | # | Helmens, Karin | see description in data abstract | |
| 13 | Betula nana-type | Bet.n-T | # | Helmens, Karin | see description in data abstract | |
| 14 | Salix | Sal | # | Helmens, Karin | see description in data abstract | |
| 15 | Juniperus | Jun | # | Helmens, Karin | see description in data abstract | |
| 16 | Ericales | Erl | # | Helmens, Karin | see description in data abstract | |
| 17 | Poaceae | Poac | # | Helmens, Karin | see description in data abstract | |
| 18 | Artemisia | Art | # | Helmens, Karin | see description in data abstract | |
| 19 | Chenopodiaceae | Cheae | # | Helmens, Karin | see description in data abstract | |
| 20 | Caryophyllaceae | Cphae | # | Helmens, Karin | see description in data abstract | |
| 21 | Rumex/Oxyria | Rum/Oxy | # | Helmens, Karin | see description in data abstract | |
| 22 | Saxifraga oppositifolia-type | Sax.o-T | # | Helmens, Karin | see description in data abstract | |
| 23 | Polygonum viviparum | Pol.v | # | Helmens, Karin | see description in data abstract | |
| 24 | Eryngium | Ery | # | Helmens, Karin | see description in data abstract | |
| 25 | Armeria maritima-type | Arm.m-T | # | Helmens, Karin | see description in data abstract | |
| 26 | Centaurium | Cei | # | Helmens, Karin | see description in data abstract | |
| 27 | Sedum-type | Sed-T | # | Helmens, Karin | see description in data abstract | |
| 28 | Rhinanthus-type | Rhi-T | # | Helmens, Karin | see description in data abstract | |
| 29 | Sanguisorba minor ssp. minor | San.m.m | # | Helmens, Karin | see description in data abstract | |
| 30 | Polemonium | Poe | # | Helmens, Karin | see description in data abstract | |
| 31 | Cyperaceae | Cypae | # | Helmens, Karin | see description in data abstract | |
| 32 | Brassicaceae | Braae | # | Helmens, Karin | see description in data abstract | |
| 33 | Anthemis-type | Ant-T | # | Helmens, Karin | see description in data abstract | |
| 34 | Aster-type | Ast-T | # | Helmens, Karin | see description in data abstract | |
| 35 | Cirsium | Cir | # | Helmens, Karin | see description in data abstract | |
| 36 | Asteraceae undifferentiated | Astae.ud | # | Helmens, Karin | see description in data abstract | |
| 37 | Latuceae | Latuceae | # | Helmens, Karin | see description in data abstract | |
| 38 | Ranunculaceae | Ranae | # | Helmens, Karin | see description in data abstract | |
| 39 | Thalictrum | Tha | # | Helmens, Karin | see description in data abstract | |
| 40 | Tofieldia | Tof | # | Helmens, Karin | see description in data abstract | |
| 41 | Plantago undifferentiated | Pla.ud | # | Helmens, Karin | see description in data abstract | |
| 42 | Apiaceae undifferentiated | Api.ud | # | Helmens, Karin | see description in data abstract | |
| 43 | Epilobium | Epl | # | Helmens, Karin | see description in data abstract | |
| 44 | Filipendula | Flp | # | Helmens, Karin | see description in data abstract | |
| 45 | Urtica | Urt | # | Helmens, Karin | see description in data abstract | |
| 46 | Galium | Gal | # | Helmens, Karin | see description in data abstract | |
| 47 | Potentilla | Pti | # | Helmens, Karin | see description in data abstract | |
| 48 | Rosaceae undifferentiated | Rosae.ud | # | Helmens, Karin | see description in data abstract | |
| 49 | Huperzia selago | Hup.s | # | Helmens, Karin | see description in data abstract | |
| 50 | Lycopodium annotinum | Lyc.a | # | Helmens, Karin | see description in data abstract | |
| 51 | Diphasiastrum | Dipt | # | Helmens, Karin | see description in data abstract | |
| 52 | Lycopodium clavatum | Lyc.c | # | Helmens, Karin | see description in data abstract | |
| 53 | Lycopodiaceae undifferentiated | Lycae.ud | # | Helmens, Karin | see description in data abstract | |
| 54 | Osmunda regalis | Osm.r | # | Helmens, Karin | see description in data abstract | |
| 55 | Selaginella selaginoides | Sel.s | # | Helmens, Karin | see description in data abstract | |
| 56 | Botrychium | Bot | # | Helmens, Karin | see description in data abstract | |
| 57 | Athyrium-type | Aty-T | # | Helmens, Karin | see description in data abstract | |
| 58 | Polypodiaceae undifferentiated | Polae.u | # | Helmens, Karin | see description in data abstract | |
| 59 | Pediastrum undifferentiated | Ped.ud | # | Helmens, Karin | see description in data abstract | |
| 60 | Botryococcus undifferentiated | Botryococcus undiff | # | Helmens, Karin | see description in data abstract | |
| 61 | Pollen and spores, other | Pollen+spores oth | # | Helmens, Karin | see description in data abstract | HdV-Type_225 |
| 62 | Zygnema | Zyn | # | Helmens, Karin | see description in data abstract | |
| 63 | Pollen and spores, other | Pollen+spores oth | # | Helmens, Karin | see description in data abstract | HdV-Type_128 |
| 64 | Tetraedron minimum | Tet.m | # | Helmens, Karin | see description in data abstract | |
| 65 | Unknown pollen | Ind.ud.p | # | Helmens, Karin | see description in data abstract | Algal-type |
| 66 | Spirogyra | Spi | # | Helmens, Karin | see description in data abstract | |
| 67 | Potamogeton | Pot | # | Helmens, Karin | see description in data abstract | |
| 68 | Hippuris | Hps | # | Helmens, Karin | see description in data abstract | |
| 69 | Sparganium | Spa | # | Helmens, Karin | see description in data abstract | |
| 70 | Isoetes | Iso | # | Helmens, Karin | see description in data abstract | |
| 71 | Filinia longiseta-type | Fil.l-T | # | Helmens, Karin | see description in data abstract | |
| 72 | Persicaria amphibia | Per.a | # | Helmens, Karin | see description in data abstract | |
| 73 | Callitriche | Clt | # | Helmens, Karin | see description in data abstract | |
| 74 | Typha latifolia | Typ.l | # | Helmens, Karin | see description in data abstract | |
| 75 | Botryococcus neglectus | Bot.n | # | Helmens, Karin | see description in data abstract | |
| 76 | Pollen and spores, other | Pollen+spores oth | # | Helmens, Karin | see description in data abstract | HdV-Type_127 |
| 77 | Pollen and spores, other | Pollen+spores oth | # | Helmens, Karin | see description in data abstract | HdV-Type_129 |
| 78 | Nymphaea | Nym | # | Helmens, Karin | see description in data abstract | |
| 79 | Nuphar | Nup | # | Helmens, Karin | see description in data abstract | |
| 80 | Myriophyllum | Myo | # | Helmens, Karin | see description in data abstract | |
| 81 | Menyanthes | Mey | # | Helmens, Karin | see description in data abstract | |
| 82 | Equisetum | Equ | # | Helmens, Karin | see description in data abstract | |
| 83 | Pollen and spores, other | Pollen+spores oth | # | Helmens, Karin | see description in data abstract | HdV-Type_217 |
| 84 | Sphagnum | Sph | # | Helmens, Karin | see description in data abstract | |
| 85 | Rubus chamaemorus | Rub.c | # | Helmens, Karin | see description in data abstract | |
| 86 | Pollen and spores, other | Pollen+spores oth | # | Helmens, Karin | see description in data abstract | HdV-Type_340 |
| 87 | Fungi undifferentiated | Fun.u | # | Helmens, Karin | see description in data abstract | |
| 88 | Clasterosporium carpophilum | C. carpophilum | # | Helmens, Karin | see description in data abstract | |
| 89 | Glomus | Glomus | # | Helmens, Karin | see description in data abstract | |
| 90 | Pollen, exotic | Pollen exotic | # | Helmens, Karin | see description in data abstract | |
| 91 | Pollen indeterminata | Pollen indet | # | Helmens, Karin | see description in data abstract |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
5670 data points
Download Data
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