Samuli Helama

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Publications in SciGraph latest 50 shown

  • 2018-12 Solar superstorm of AD 774 recorded subannually by Arctic tree rings in NATURE COMMUNICATIONS
  • 2018-12 Volcanic dust veils from sixth century tree-ring isotopes linked to reduced irradiance, primary production and human health in SCIENTIFIC REPORTS
  • 2018-06 Reconstruction of precipitation variability in Estonia since the eighteenth century, inferred from oak and spruce tree rings in CLIMATE DYNAMICS
  • 2017-12 Tree height strongly affects estimates of water-use efficiency responses to climate and CO2 using isotopes in NATURE COMMUNICATIONS
  • 2017-12 Connecting potential frost damage events identified from meteorological records to radial growth variation in Norway spruce and Scots pine in TREES
  • 2017-12 Erratum to: Connecting potential frost damage events identified from meteorological records to radial growth variation in Norway spruce and Scots pine in TREES
  • 2017-04 Limited Late Antique cooling in NATURE GEOSCIENCE
  • 2016-03 Dendrochronological dating of wooden artifacts by measuring the tree rings using magnifying glass and photography-assisted method: an example of a Dutch panel painting in ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
  • 2016-03 Oak Decline as Illustrated Through Plant–Climate Interactions Near the Northern Edge of Species Range in THE BOTANICAL REVIEW
  • 2016-01 Inter- and intra-seasonal effects of temperature variation on radial growth of alpine treeline Norway spruce in JOURNAL OF MOUNTAIN SCIENCE
  • 2015-05 LA-ICP-MS-derived U-concentrations and microstructural domains within biogenic aragonite of Arctica islandica shell in ENVIRONMENTAL MONITORING AND ASSESSMENT
  • 2015 The Historical Time Frame (Past 1000 Years) in SECOND ASSESSMENT OF CLIMATE CHANGE FOR THE BALTIC SEA BASIN
  • 2014-09 A palaeotemperature record for the Finnish Lakeland based on microdensitometric variations in tree rings in GEOCHRONOMETRIA
  • 2014-08 Does diurnal temperature range influence seasonal suicide mortality? Assessment of daily data of the Helsinki metropolitan area from 1973 to 2010 in INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
  • 2014-08 Oak decline analyzed using intraannual radial growth indices, δ13C series and climate data from a rural hemiboreal landscape in southwesternmost Finland in ENVIRONMENTAL MONITORING AND ASSESSMENT
  • 2014-05 Dendroclimatic signals of pedunculate oak (Quercus robur L.) in Estonia in EUROPEAN JOURNAL OF FOREST RESEARCH
  • 2014-03 Oak decline in a southern Finnish forest as affected by a drought sequence in GEOCHRONOMETRIA
  • 2013-12 Quantifying temporal changes in Tornionjoki river ice breakup dates and spring temperatures in Lapland since 1802 in JOURNAL OF GEOGRAPHICAL SCIENCES
  • 2013-12 Evaluating direct and indirect evidence of climatic change by Hölder regularity and order pattern in time series in GEOMAGNETISM AND AERONOMY
  • 2013-11 Variation and seasonal patterns of suicide mortality in Finland and Sweden since the 1750s in ENVIRONMENTAL HEALTH AND PREVENTIVE MEDICINE
  • 2013-11 Dendroclimatic signals deduced from riparian versus upland forest interior pines in North Karelia, Finland in ECOLOGICAL RESEARCH
  • 2013-09 Temperature-associated suicide mortality: contrasting roles of climatic warming and the suicide prevention program in Finland in ENVIRONMENTAL HEALTH AND PREVENTIVE MEDICINE
  • 2013-05 Plant phenological records in northern Finland since the 18th century as retrieved from databases, archives and diaries for biometeorological research in INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
  • 2012-09 Dendroclimatology. Progress and Prospects. Malcolm K. Hughes, Thomas W. Swetnam, Henry F. Diaz (Eds.) Developments in Paleoenvironmental Research, Vol. 11. 1st Edition, 2011, XII, 365 p. Hardcover, ISBN 978-1-4020-4010-8. in ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
  • 2012-06 Fusing pollen-stratigraphic and dendroclimatic proxy data to reconstruct summer temperature variability during the past 7.5 ka in subarctic Fennoscandia in JOURNAL OF PALEOLIMNOLOGY
  • 2012-05 Analysis of reconstructed annual precipitation from tree-rings for the past 500 years in the middle Qilian Mountain in SCIENCE CHINA EARTH SCIENCES
  • 2012-04 Mortality of urban pines in Helsinki explored using tree rings and climate records in TREES
  • 2010-05 Unprecedented low twentieth century winter sea ice extent in the Western Nordic Seas since A.D. 1200 in CLIMATE DYNAMICS
  • 2010-05 Dendrochronological investigation of wood extractives in WOOD SCIENCE AND TECHNOLOGY
  • 2009-12 Quasisecular cyclicity in the climate of the Earth’s Northern Hemisphere and its possible relation to solar activity variations in GEOMAGNETISM AND AERONOMY
  • 2009-06 Oak decline in Helsinki portrayed by tree-rings, climate and soil data in PLANT AND SOIL
  • 2009-04 Little Ice Age Farming in Finland: Preindustrial Agriculture on the Edge of the Grim Reaper’s Scythe in HUMAN ECOLOGY
  • 2009-01 A multiproxy reconstruction of spring temperatures in south-west Finland since 1750 in CLIMATIC CHANGE
  • 2008-12 Shell growth history of geoduck clam (Panopea abrupta) in Parry Passage, British Columbia, Canada: Temporal variation in annuli and the Pacific Decadal Oscillation in JOURNAL OF OCEANOGRAPHY
  • 2008-11 X-ray microdensitometry applied to subfossil tree-rings: growth characteristics of ancient pines from the southern boreal forest zone in Finland at intra-annual to centennial time-scales in VEGETATION HISTORY AND ARCHAEOBOTANY
  • 2008-09 Ontogenetic morphometrics of individual freshwater pearl mussels (Margaritifera margaritifera (L.)) reconstructed from geometric conchology and trigonometric sclerochronology in HYDROBIOLOGIA
  • 2008-08 Mikuláš R. and Dronov A., Palaeoichnology—Introduction to the Study of Trace Fossils, Institute of Geology, Academy of Sciences of Czech Republic, Prague, 2006, 122 pp. in PALEONTOLOGICAL JOURNAL
  • 2008-07 Construction of statistically reliable sclerochronology using subfossil shells of river pearl mussel in JOURNAL OF PALEOLIMNOLOGY
  • 2008-05 Dendroclimatological analysis of seeded and thinned Scots pine (Pinus sylvestris L.) stands at the coniferous timberline in NEW FORESTS
  • 2007-06 ENSO-coupled precipitation records (1959–2004) based on shells of freshwater bivalve mollusks (Margaritifera falcata) from British Columbia in INTERNATIONAL JOURNAL OF EARTH SCIENCES
  • 2006-09 Plant phenological data and tree-rings as palaeoclimate indicators in south-west Finland since AD 1750 in INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
  • 2004-12 Detection of climate signal in dendrochronological data analysis: a comparison of tree-ring standardization methods in THEORETICAL AND APPLIED CLIMATOLOGY
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