Samuli Helama

6.9k total citations
171 papers, 3.7k citations indexed

About

Samuli Helama is a scholar working on Atmospheric Science, Global and Planetary Change and Ecology. According to data from OpenAlex, Samuli Helama has authored 171 papers receiving a total of 3.7k indexed citations (citations by other indexed papers that have themselves been cited), including 139 papers in Atmospheric Science, 101 papers in Global and Planetary Change and 24 papers in Ecology. Recurrent topics in Samuli Helama's work include Tree-ring climate responses (119 papers), Geology and Paleoclimatology Research (83 papers) and Plant Water Relations and Carbon Dynamics (81 papers). Samuli Helama is often cited by papers focused on Tree-ring climate responses (119 papers), Geology and Paleoclimatology Research (83 papers) and Plant Water Relations and Carbon Dynamics (81 papers). Samuli Helama collaborates with scholars based in Finland, United Kingdom and Estonia. Samuli Helama's co-authors include Mauri Timonen, Jari Holopainen, Markus Lindholm, Jouko Meriläinen, Keith R. Briffa, Matti Eronen, Heikki Tuomenvirta, Kari Mielikäinen, P. D. Jones and M. Eronen and has published in prestigious journals such as Nature Communications, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Samuli Helama

167 papers receiving 3.5k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Samuli Helama Finland 35 2.7k 1.9k 615 535 408 171 3.7k
Henry F. Díaz United States 26 2.8k 1.0× 2.3k 1.2× 322 0.5× 535 1.0× 265 0.6× 55 4.0k
Christelle Hély France 30 1.6k 0.6× 1.8k 0.9× 593 1.0× 714 1.3× 285 0.7× 86 3.1k
Mitchell J. Power United States 22 2.0k 0.8× 1.9k 1.0× 268 0.4× 736 1.4× 379 0.9× 64 3.1k
Willy Tegel Germany 29 2.9k 1.1× 1.9k 1.0× 821 1.3× 378 0.7× 774 1.9× 90 4.4k
Fredrik Charpentier Ljungqvist Sweden 31 3.4k 1.3× 2.5k 1.3× 394 0.6× 424 0.8× 535 1.3× 103 4.2k
Danièle Colombaroli Switzerland 35 2.5k 0.9× 1.5k 0.8× 457 0.7× 783 1.5× 789 1.9× 73 3.8k
Jozef Syktus Australia 24 1.3k 0.5× 1.4k 0.7× 208 0.3× 472 0.9× 585 1.4× 62 2.9k
R. Scott Anderson United States 42 3.5k 1.3× 1.4k 0.7× 451 0.7× 1.3k 2.4× 905 2.2× 154 4.8k
Daniel H. Mann United States 34 2.2k 0.8× 780 0.4× 254 0.4× 947 1.8× 457 1.1× 76 3.2k
Steve Vavrus United States 26 1.8k 0.7× 1.9k 1.0× 198 0.3× 364 0.7× 164 0.4× 40 2.8k

Countries citing papers authored by Samuli Helama

Since Specialization
Citations

This map shows the geographic impact of Samuli Helama's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Samuli Helama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Samuli Helama more than expected).

Fields of papers citing papers by Samuli Helama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Samuli Helama. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Samuli Helama. The network helps show where Samuli Helama may publish in the future.

Co-authorship network of co-authors of Samuli Helama

This figure shows the co-authorship network connecting the top 25 collaborators of Samuli Helama. A scholar is included among the top collaborators of Samuli Helama based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Samuli Helama. Samuli Helama is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Helama, Samuli, Juha Heikkinen, Aleksi Lehtonen, & Raisa Mäkipää. (2025). Growth response of Norway spruce trees to selection harvest in continuous cover forestry stands on drained boreal peatlands. Forest Ecology and Management. 593. 122816–122816.
2.
Arppe, Laura, Nicolás Brehm, T. Hackman, et al.. (2024). Transient Offset in 14C After the Carrington Event Recorded by Polar Tree Rings. Geophysical Research Letters. 51(5). 6 indexed citations
3.
Holopainen, Jari, Samuli Helama, & Henry Väre. (2023). The written history of plant phenology: shaping primary sources for secondary publications. Die Naturwissenschaften. 110(4). 34–34. 1 indexed citations
4.
Helama, Samuli, et al.. (2022). Tricentennial trends in spring ice break-ups on three rivers in northern Europe. ˜The œcryosphere. 16(7). 2881–2898. 2 indexed citations
5.
Helama, Samuli, Matthew Tom Harrison, C. Alan Rotz, et al.. (2022). Use, calibration and verification of agroecological models for boreal environments: A review. SHILAP Revista de lepidopterología. 1(1). 14–30. 4 indexed citations
6.
Helama, Samuli, et al.. (2021). Tricentennial trends in spring ice breakups in three rivers in northern Europe. 1 indexed citations
7.
Helama, Samuli, Markus Stoffel, Richard J. Hall, et al.. (2021). Recurrent transitions to Little Ice Age-like climatic regimes over the Holocene. Climate Dynamics. 56(11-12). 3817–3833. 19 indexed citations
8.
Helama, Samuli & Vladimir V Matskovsky. (2020). Comment on “Absence of Age‐Related Trends in Stable Oxygen Isotope Ratios From Oak Tree Rings” by Duffy et al. (2019). Global Biogeochemical Cycles. 34(2). 4 indexed citations
9.
Tintner, Johannes, Bernhard Spangl, Michael Grabner, et al.. (2020). MD dating: molecular decay (MD) in pinewood as a dating method. Scientific Reports. 10(1). 11255–11255. 5 indexed citations
10.
Oinonen, M., Teija Alenius, Laura Arppe, et al.. (2020). Buried in water, burdened by nature—Resilience carried the Iron Age people through Fimbulvinter. PLoS ONE. 15(4). e0231787–e0231787. 11 indexed citations
11.
Helama, Samuli, Anne Tolvanen, Jouni Karhu, Jarmo Poikolainen, & Eero Kubin. (2020). Finnish National Phenological Network 1997–2017: from observations to trend detection. International Journal of Biometeorology. 64(10). 1783–1793. 6 indexed citations
12.
Arppe, Laura, T. Hackman, Samuli Helama, et al.. (2018). Solar superstorm of AD 774 recorded subannually by Arctic tree rings. Nature Communications. 9(1). 3495–3495. 47 indexed citations
13.
Holopainen, Jari, Samuli Helama, Charlotte Björkenstam, & Timo Partonen. (2013). Variation and seasonal patterns of suicide mortality in Finland and Sweden since the 1750s. Environmental Health and Preventive Medicine. 18(6). 494–501. 40 indexed citations
14.
Holopainen, Jari, Samuli Helama, & Timo Partonen. (2013). Does diurnal temperature range influence seasonal suicide mortality? Assessment of daily data of the Helsinki metropolitan area from 1973 to 2010. International Journal of Biometeorology. 58(6). 1039–1045. 38 indexed citations
15.
Helle, Samuli, Samuli Helama, & Kalle Lertola. (2009). Evolutionary ecology of human birth sex ratio under the compound influence of climate change, famine, economic crises and wars. Journal of Animal Ecology. 78(6). 1226–1233. 47 indexed citations
16.
Helama, Samuli, et al.. (2008). The oldest recorded animal in Finland: ontogenetic age and growth in Margaritifera margaritifera (L. 1758) based on internall shell increments. 84. 20–30. 10 indexed citations
17.
Helle, Samuli, et al.. (2008). Do humans adjust offspring sex according to the local operational sex ratio. Evolutionary ecology research. 10(5). 775–785. 8 indexed citations
18.
Helama, Samuli, et al.. (2007). Shell morphometry, pre-mortal taphonomy and ontogeny-related growth characteristics of freshwater pearl mussel in northern Finland. Annales Zoologici Fennici. 44(4). 285–302. 18 indexed citations
19.
Helama, Samuli, et al.. (2007). Conchology of endangered freshwater pear mussel: conservation palaeobiology applied to museum shells originating from northern Finland.. Bollettino Malacologico. 161–170. 8 indexed citations
20.
Nielsen, Jan Kresten, et al.. (2007). Eemian marine mollusks and barnacles from Ristinge Klint, Denmark: hydrodynamics and oxygen deficiency. Netherlands Journal of Geosciences – Geologie en Mijnbouw. 86(2). 95–115. 7 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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