Publications by authors named "Samuli Helama"

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Contrasting pathways to tree longevity in gymnosperms and angiosperms.
Roel J W Brienen, Giuliano Maselli Locosselli, Stefan Krottenthaler, Emanuel Gloor, Robyn Wrigley, Samuli Helama

Nat Commun· December 2025

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The written history of plant phenology: shaping primary sources for secondary publications.
Jari Holopainen, Samuli Helama, Henry Väre

Naturwissenschaften· July 2023

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Plant phenological dataset collated by the Finnish Society of Sciences and Letters.
Jari Holopainen, Samuli Helama, Henry Väre

Ecology· February 2023

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The influence of decision-making in tree ring-based climate reconstructions.
Ulf Büntgen, Kathy Allen, Kevin J Anchukaitis, Dominique Arseneault, Étienne Boucher, Samuli Helama

Nat Commun· June 2021

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Recurrent transitions to Little Ice Age-like climatic regimes over the Holocene.
Samuli Helama, Markus Stoffel, Richard J Hall, Phil D Jones, Laura Arppe

Clim Dyn· February 2021

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Finnish National Phenological Network 1997-2017: from observations to trend detection.
Samuli Helama, Anne Tolvanen, Jouni Karhu, Jarmo Poikolainen, Eero Kubin

Int J Biometeorol· October 2020

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Buried in water, burdened by nature-Resilience carried the Iron Age people through Fimbulvinter.
Markku Oinonen, Teija Alenius, Laura Arppe, Hervé Bocherens, Heli Etu-Sihvola, Samuli Helama

PLoS One· July 2020

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Arctic moistening provides negative feedbacks to riparian plants.
Samuli Helama, Laura Arppe, Kari Mielikäinen, Markku Oinonen

Glob Chang Biol· June 2018

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Volcanic dust veils from sixth century tree-ring isotopes linked to reduced irradiance, primary production and human health.
Samuli Helama, Laura Arppe, Joonas Uusitalo, Jari Holopainen, Hanna M Mäkelä

Sci Rep· January 2018

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Old World megadroughts and pluvials during the Common Era.
Edward R Cook, Richard Seager, Yochanan Kushnir, Keith R Briffa, Ulf Büntgen, Samuli Helama

Sci Adv· November 2015

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LA-ICP-MS-derived U-concentrations and microstructural domains within biogenic aragonite of Arctica islandica shell.
Samuli Helama, Pasi Heikkilä, Katja Rinne, Jan Kresten Nielsen, Jesper Kresten Nielsen

Environ Monit Assess· May 2015

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Plant phenological records in northern Finland since the 18th century as retrieved from databases, archives and diaries for biometeorological research.
Jari Holopainen, Samuli Helama, Hanna Lappalainen, Hilppa Gregow

Int J Biometeorol· May 2013

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Causes and consequences of past and projected Scandinavian summer temperatures, 500-2100 AD.
Ulf Büntgen, Christoph C Raible, David Frank, Samuli Helama, Laura Cunningham

PLoS One· February 2012

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Food availability at birth limited reproductive success in historical humans.
Ian J Rickard, Jari Holopainen, Samuli Helama, Samuli Helle, Andrew F Russell

Ecology· December 2010

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Evolutionary ecology of human birth sex ratio under the compound influence of climate change, famine, economic crises and wars.
Samuli Helle, Samuli Helama, Kalle Lertola

J Anim Ecol· November 2009

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Temperature-related birth sex ratio bias in historical Sami: warm years bring more sons.
Samuli Helle, Samuli Helama, Jukka Jokela

Biol Lett· February 2008

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Climatic variability and the population dynamics of historical hunter-gatherers: the case of Sami of Northern Finland.
Samuli Helle, Samuli Helama

Am J Hum Biol· January 2008

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Compound response of marine and terrestrial ecosystems to varying climate: pre-anthropogenic perspective from bivalve shell growth increments and tree-rings.
Samuli Helama, Bernd R Schöne, Andreas J Kirchhefer, Jan K Nielsen, David L Rodland

Mar Environ Res· April 2007

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Plant phenological data and tree-rings as palaeoclimate indicators in south-west Finland since AD 1750.
Jari Holopainen, Samuli Helama, Mauri Timonen

Int J Biometeorol· September 2006

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