Palynological data from southern and western Iceland show rising values for the pollen of Betula pubescens for the period AD 600—800. The increased values for B. pubescens probably stem from both improved flowering conditions and increased coverage and density of woodlands associated with short-lived climatic amelioration within a phase of longer-term harsh climate. The swift response to climate change in the palynological record and good correlation with comparative data from other proxies indicates that Icelandic palynology offers an important, yet largely underexploited, tool for the reconstruction of Icelandic Holocene environments.
Andersen, T.B.1991: A model to predict the beginning of the pollen season . Grana30, 269-75.
2.
Andrews, J.T., Caseldine, C., Weiner, N.J. and Hatton, J.2001: Late Holocene (ca. 4 ka) marine and terrestrial environmental change in Reykjafjörður, north Iceland: climate and/or settlement?Journal of Quaternary Science16, 119-32.
3.
Atkinson, M.D.1992: Betula pendula (B. verrucosa Ehrh.) and Betula pubescens Ehrh. The Journal of Ecology80, 837-70.
4.
Autio, J. and Hicks, S.2004: Annual variations in pollen deposition and meteorological conditions on the fell Aakenustunturi in northern Finland: potential for using fossil pollen as a climate proxy. Grana43, 31-47.
5.
Barnekow, L., Loader, N.J., Hicks, S., Froyd, C.A. and Goslar, T.2007: Strong correlation between summer temperature and pollen accumulation rates for Pinus sylvestris, Picea abies and Betula spp. in a high-resolution record from northern Sweden. Journal of Quaternary Science22, 653-58.
6.
Bartley, D.D.1973: The stratigraphy and pollen analysis of peat deposits at Ytri-Bægisá near Akureyri, Iceland. Geologiska Föreningens i Stockholm Förhandlingar95, 410-14.
7.
Bending, J.M.2007: The economy of the Norse settlement of the North Atlantic and its environmental impact: an archaeobotanical assessment. Unpublished PhD thesis, University of Sheffield.
8.
Bengtson, L. and Enell, M.1986: Chemical analysis. In Berglund, B.E., editor, Handbook of Holocene palaeoecology and palaeohydrology. John Wiley and Sons, 423-51.
9.
Bennett, K.2009: Catalogue of pollen types. http://www.chrono.qub.ac.uk/pollen/pc-intro.html (last accessed: April 2009).
10.
Bronk-Ramsey, C.2005: OxCal v3.10. University of Oxford . http://www.rlaha.ox.ac.uk/oxcal/oxcal.htm (last accessed: April 2009).
11.
Buckland, P.C., Gerrard, A.J., Larsen, G., Perry, D.W., Savory, D.R. and Sveinbjarnardóttir, G.1986: Late Holocene palaeoecology at Ketilsstaðir in Mýrdalur, South Iceland. Jökull36, 41-55.
12.
Buckland, P.C., Edwards, K.J., Blackford, J.J., Dugmore, A.J., Sadler, J.P. and Sveinbjarnardóttir, G.1995: A question of Landnám: pollen, charcoal and insect studies on Papey, eastern Iceland. In Butlin, R. and Roberts, N., editors, Ecological relations in historical times: human impact and adaptation. Blackwell, 245-64.
13.
Caseldine, C.2001: Changes in Betula in the Holocene record from Iceland - a palaeoclimatic record or evidence for early Holocene hybridisation? Review of Palaeobotany and Palynology19, 139-52.
14.
Caseldine, C. and Hatton, J.1994: Interpretation of Holocene climatic change. Münchener Geographische AbhandlungenB12, 41-62.
15.
Caseldine, C., Geirsdóttir, Á. and Langdon, P.2003: Efstadalsvatn - a multi-proxy study of a Holocene lacustrine sequence from NW Iceland. Journal of Paleolimnology30, 55-73.
16.
Caseldine, C., Langdon, P. and Holmes, N.2006: Early Holocene climate variability and the timing and extent of the Holocene thermal maximum (HTM) in northern Iceland. Quaternary Science Reviews25, 2314-31.
17.
Castañeda, I.S., Smith, L.M., Kristjánsdóttir, G.B. and Andrews, J.T.2004: Temporal changes in Holocene δ18O records from the northwest and central North Iceland Shelf. Journal of Quaternary Science19, 321-34.
18.
Charman, D.2002: Peatlands and environmental change. John Wiley & Sons.
19.
Church, M.J., Dugmore, A.J., Mairs, K-A., Millard, A.R., Cook, G.T., Sveinbjarnardóttir, G., Ascough, P.A. and Roucoux, K.H.2007: Charcoal production during the Norse and early medieval periods in Eyjafjallahreppur, southern Iceland. Radiocarbon49, 659-72.
20.
Dahl, Å. and Strandhede, S-O.1996: Predicting the intensity of the birch pollen season . Aerobiologia12, 97-106.
21.
Dearing, J.A.1999: Magnetic susceptibility. In Walden, J., Oldfield, F. and Smith, J.P., editors, Environmental magnetism: a practical guide. Technical guide 6. Quaternary Research Association, 35-62.
22.
Dugmore, A.J. and Erskine, C.C.1994: Patterns of soil erosion in Southern Iceland. Münchener Geographische AbhandlungenB12, 63-78.
23.
Dugmore, A.J., Church, M.J., Mairs, K-A., McGovern, T., Newton, A. and Sveinbjarnardóttir, G.2006: An over-optimistic pioneer fringe? Environmental perspectives on medieval settlement abandonment in Þórsmörk, south Iceland . In Arneborg, J. and Grønnow, B., editors, Dynamics of northern societies. PNM, Publications from the National Museum, Studies in Archaeology and History10, 335-46.
24.
Edwards, K.J., Lawson, I.T., Erlendsson, E. and Dugmore, A.J.2005: Landscapes of contrast in Viking age Iceland and the Faroe Islands. Landscapes6, 63-81.
Einarsson, Þ.1957: Tvö frjólínurit úr íslenskum mómýrum. Ársrit Skógræktarfélags Íslands1957, 89-97.
28.
--- 1961: Pollenanalytische Untersuchungen zur spät- und postglazialen Klimageschichte Islands. Sonder veröffentlichungen des Geologischen Institutes der Universität Köln6, 1-52.
29.
--- 1962: Vitnisburður frjógreiningar um gróður veðurfar og landnám á Íslandi. Saga24, 442-69.
30.
--- 1969: Loftslag, sjávarhiti og hafís á forsögulegum tíma. In Einarsson, M.Á., editor, Hafísinn. Almenna bókafélagið, 389-402.
31.
Eiríksson, J., Bartels-Jónsdóttir, H.B., Cage, A.G., Gudmundsdottir , E.R., Klitgaard-Kristensen, D., Marret, F., Rodrigues, R., Abrantes, F., Austin, W.E.N., Jiang, H., Knudsen, K.L. and Sejrup, H.P.2006: Variability of the North Atlantic Current during the last 2000 years based on shelf bottom water and sea surface temperature along an open ocean/shallow marine transect in western Europe. The Holocene16, 1017-29.
32.
Erlendsson, E.2007: Environmental change around the time of the Norse settlement of Iceland. Unpublished PhD thesis, University of Aberdeen .
33.
Erlendsson, E., Edwards, K.J. and Buckland, P.C.2009a: Vegetational response to human colonisation of the coastal and volcanic environments of Ketilsstaðir, southern Iceland . Quaternary Research DOI:10.1016/j.yqres.2009.05.005.
34.
Erlendsson, E., Vickers, K.A., Gathorne-Hardy, F., Bending, J.M., Gunnarsdóttir, B., Gísladóttir, G. and Edwards, K.J.2009b: Late-Holocene environmental history of the Reykholt area, Borgarfjörður, western Iceland. In Þorgeirsson, B., editor, Mellan text och materiell kultur. Snorrastofa, in press.
35.
Gathorne-Hardy, F., Erlendsson, E., Langdon, P. and Edwards, K.J.2009: Lake sediment evidence for late-Holocene climate change and landscape erosion in western Iceland. Journal of Paleolimnology . DOI: 10.1007/s10933-008-9285-4.
36.
Geirsdóttir, Á., Miller, G.H., Þórðarson, Þ. and Ólafsdóttir , K.2009: A 2000 year record of climate variatioins reconstructed from Haukadalsvatn, West Iceland. Journal of Paleolimnology41, 95-115.
37.
Giraudeau, J., Jennings, A.E. and Andrews, J.T.2004: Timing and mechanisms of surface and intermediate water circulation changes in the Nordic Seas over the last 10,000 cal years: a view from the North Icelandic Shelf. Quaternary Science Reviews23, 2127-39.
38.
Grimm, E.C.1991: TILIA and TILIA GRAPH. Illinois State Museum. --- 2004: TGView. Illinois State Museum.
39.
Grönvold, K., Óskarsson, N., Johnsen, J., Clausen, H.B., Hammer, C.U., Bond, G. and Bard, E.1995: Ash layers from Iceland in the Greenland GRIP ice core correlated with oceanic and land sediments. Earth and Planetary Science Letters135, 149-55.
40.
Hafliðason, H., Larsen, G. and Ólafsson, G.1992: The recent sedimentation history of Thingvallavatn, Iceland . Oikos64, 80-95.
41.
Hall, V.A., Pilcher, J.R. and Bowler, M.1993: Pre-elm decline cereal-size pollen; evaluating its recruitment to fossil deposits using modern pollen rain studies. Biology and Environment: Proceedings of the Royal Irish Academy93(B), 1-4.
42.
Hallsdóttir, M.1982: Frjógreining tveggja jarðvegssniða úr Hrafnkelsdal. Áhrif ábúðar á gróðurfar dalsins. Árbók Hins íslenska fornleifafélags1982, 253-65.
43.
--- 1987: Pollen analytical studies of human influence on vegetation in relation to the Landnám Tephra layer in southwest Iceland. Lund University, Lundqua Thesis 18.
44.
--- 1993: Frjókornarannsókn á mósniðum úr Viðey. Research report RH-08-93, Raunvísindastofnun Háskólans and Árbæjarsafn.
45.
--- 1995: On the pre-settlement history of Icelandic vegetation . Búvísindi9, 17-29.
46.
--- 1999: Birch pollen abundance in Reykjavík, Iceland. Grana38, 368-73.
47.
Hallsdóttir, M. and Caseldine, C.2005: The Holocene vegetation history of Iceland, state-of-the-art and future research. In Caseldine, C.,Russel, A.,Harðardóttir, J. and Knudsen, Ó., editors, Iceland - modern processes and past environments. Elsevier , 319-34.
48.
Haraldsson, H.1981: The Markarfljót sandur area, southern Iceland: sedimentological, petrographical and stratigraphical studies. Striae15, 1-65.
49.
Haraldsson, H.V. and Ólafsdóttir, R.2003: Simulating vegetation cover dynamics with regards to long-term climatic variations in subarctic landscapes. Global and Planetary Change38, 313-25.
50.
Hicks, S.2001: The use of annual arboreal pollen deposition values for delimiting tree-lines in the landscape and exploring models of pollen dispersal . Review of Palaeobotany and Palynology117, 1-29.
51.
Hicks, S. and Sunnari, A.2005: Adding precision to the spatial factor of vegetation reconstructed from pollen assemblages. Plant Biosystems139, 127-34.
52.
Jiang, H., Eiríksson, J., Schulz, M., Knudsen, K.L. and Seidenkrantz, M.-S.2005: Evidence for solar forcing of sea-surface temperature on the North Icelandic Shelf during the late Holocene. Geology33, 73-76.
53.
Karlsdóttir, L., Thórsson, Æ.Th. , Hallsdóttir , M., Sigurgeirsson, A., Eysteinsson, Th. and Anamthwhat-Jónsson, K.2007: Differentiating pollen of Betula species from Iceland . Grana46, 78-84.
54.
Knudsen, K.L. and Eiríksson, J.2002: Application of tephrochronology to the timing and correlation of palaeoceanographic events in Holocene and lateglacial shelf sediments off North Iceland. Marine Geology191, 165-88.
55.
Kristinsson, H.1986: The flowering plants and ferns of Iceland. Örn og Örlygur.
56.
Larsen, G. and Eiríksson, J.2007: Late Quaternary terrestrial tephrochronology of Iceland - frequency of explosive eruptions, type and volume of tephra deposits . Journal of Quaternary Science23, 109-20.
57.
Larsen, G., Eiríksson, J., Knudsen, K.L. and Heinemeier, J.2002: Correlation of late Holocene terrestrial and marine tephra markers, North Iceland: implications for reservoir age changes. Polar Research21, 283-90.
58.
Lawson, I.T., Gathorne-Hardy, F.J., Church, M.J., Newton, A.J., Edwards, K.J., Dugmore, A.J. and Einarsson, Á.2007: Environmental impacts of the Norse settlement: palaeoenvironmental data from Mývatnssveit, Northern Iceland. Boreas36, 1-19.
59.
Mairs, K-A., Church, M.J., Dugmore, A.J. and Sveinbjarnardóttir, G.2006: Degrees of success: evaluating the environmental impacts of long term settlement in south Iceland. In Arneborg, J. and Grønnow, B., editors, Dynamics of northern societies. PNM, Publications from the National Museum, studies in archaeology and history, vol. 10, 365-74.
60.
Moore, P.D., Webb, J.A. and Collinson, M.E.1991: Pollen analysis (2nd edition). Blackwell Science.
61.
Ólafsdóttir, G. and Guðmundsson, H.J.2002: Holocene land degradation and climatic change in northeastern Iceland. The Holocene12, 159-67.
62.
Påhlson, I.1981: A pollen analytical study on a peat deposit at Lágafell, southern Iceland. Striae15, 60-64.
63.
Pichugina, N.P.1972: Effects of ecological factors upon seed formation of certain interspecies hybrids of birch. Ekologiya6, 89-91.
64.
Prentice, I.C.1986: Vegetation responses to past climatic variations . Vegetatio67, 131-41.
65.
Rousse, S., Kissel, C., Laj, C., Eiríksson, J. and Knudsen, K.L.2006: Holocene centennial to millennial-scale climatic variability: evidence from high-resolution magnetic analyses of the last 10 cal kyr off North Iceland (core MD99-2275). Earth and Planetary Science Letters242, 390-405.
66.
Rundgren, M.1995: Biostratigraphic evidence of the Alleröd-Younger Dryas-Preboreal oscillation in northern Iceland. Quaternary Research44, 405-16.
67.
Rundgren, M. and Ingólfsson, Ó. 1999: Plant survival in Iceland during periods of glaciation? Journal of Biogeography 26, 387-96. Schwaar, J. 1978: Moorkundliche untersuchungen am Laugarvatn (südwest-Island). Neðri Ás.
68.
Sicre, M-A., Jacob, J., Ezat, U., Rousse, S., Kissel, C., Yiou, P., Eiríksson, J., Knudsen, K.L., Jansen, E. and Turon, J-L.2008: Decadal variability of sea surface temperatures off North Iceland over the last 2000 years. Earth and Planetary Science Letters268, 137-42.
69.
Smith, K.T.2004: Holocene jökulhlaups, glacier fluctuations and palaeoenvironment , Mýrdalsjökull, South Iceland. Unpublished PhD thesis, University of Edinburgh .
70.
Smith, K.T. and Dugmore, A.J.2006: Jökulhlaups circa landnám: mid- to late first millennium AD floods in South Iceland and their implications for landscapes of settlement. Geografiska Annaler A88, 165-76.
71.
Smith, K.T. and Haraldsson, H.2005: A late Holocene jökulhlaup, Markarfljót, Iceland: nature, impact and implications for future hazards. Jökull55, 75-86.
72.
Stockmarr, J.1971: Tablets with spores used in absolute pollen analysis . Pollen et Spores13, 614-21.
73.
Vickers, K.A.2006: The palaeoentomology of the North Atlantic Islands. Unpublished PhD thesis, University of Sheffield.
74.
Wastl, M., Stötter, J. and Caseldine, C.2001: Reconstruction of Holocene variations of the upper limit of tree or shrub birch growth in northern Iceland based on evidence from Vesturárdalur-Skíðadalur, Tröllaskagi. Arctic , Antarctic and Alpine Research33, 191-203.
75.
Þórarinsson, S.1944: Tefrokronologiska studier på Island: Þjórsárdalur och dess förödelse. Munksgaard.
