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- Kristina Seftigen
Kristina Seftigen
Universitetslektor, biträdande
Institutionen för geovetenskaperOm Kristina Seftigen
Research interests
I am an Associate Professor in Physical Geography at the Department of Earth Sciences, University of Gothenburg, and vice-director of the Gothenburg University Laboratory of Dendrochronology (GULD). My research interests are centered on dendrochronology (tree-ring research). In short, I use the tree-ring proxy archive to characterize short- to long-term variability in moisture and temperature during the last ~2,000 years, at local, regional and hemispheric scales. While the tree-ring archive is the core of my work, my research interests also include other proxy records, and how these relate to General Circulation Models.
I am particularly interested in past hydroclimatic changes in Scandinavia. By applying new methods and incorporating other tree-ring parameters than the commonly used tree-ring width proxy, I aim to refine our knowledge of past hydroclimate changes in Scandinavia – a region traditionally overlooked in tree-ring studies of past droughts because of the cool and rather humid climate regime.
I am the PI of several ongoing and finished projects:
Ongoing projects
- "The Shrubification of the Swedish Tundra – Multidisciplinary Monitoring for a Consensus Perspective" (2024-2026, funded by FORMAS) is a project aimed at studying shrub growth in sub-Arctic Sweden. As part of this initiative, we have established a monitoring program that includes high-precision dendrometers to track the growth of shrub genera such as Betula, Salix, and Juniperus. The dataset, which captures hourly stem diameter changes, will be enriched by retrospective analyses of shrub-ring chronologies and xylem anatomical traits using dendrochronological methods. This comprehensive in-situ data collection is expected to enhance our understanding of Arctic vegetation changes across different time scales—past, present, and future.
- "Are droughts becoming the new normal for Sweden? – Integrating proxy data and model simulations to understand past and future hydroclimate" (2020-2024, funded by Vetenskapsrådet). The recent droughts in Scandinavia have shown how a changing climate can greatly impact both the environment and human well-being. This project aims to better understand Sweden's regional hydroclimate patterns over the past centuries and how natural climate variability interacts with human-driven climate change. A key outcome of the project will be the creation of a unique, 1,000-year-long tree-ring dataset, offering a new perspective on Sweden's hydroclimate history. This data will not only help validate climate models but also provide a long-term view of climate patterns, especially as we compare modern trends with past warming periods, such as the Medieval Climate Anomaly, which serves as an important benchmark for understanding current climate changes.
Previous projects
- “Bridging paleoclimate records and climate model simulations with a novel model/proxy comparison framework” (duration 2020-2023, funded by FORMAS). This project combines tree-ring anatomy, proxy system modelling, and the last-millennium PMIP4/CMIP6 model simulations to better characterize the northern hemisphere temperature evolution over the last ~1,000 years. Specifically, we 1) produce and analyze multiple, millennium-long, dendroanatomical time series at strategically selected sites across the Northern Hemisphere; 2) develop and adapt a proxy system modelling (PSM) framework that is employed to sharpen climate-signal interpretation of the novel proxy parameters, to quantify uncertainties with traditional statistical calibration approaches and retrodict inter-annual to long-term temperature variability of the last millennium; 3) compare and integrate proxy data and model simulations to jointly address uncertainties in both and generate critical insights into the dynamics of the climate system that each would be unable to provide separately. Project partners include the Dendrosciences group at the Swiss Federal Research Institute WSL (project page here), the Tree-Ring Laboratory University of St Andrews, and the Faculty of Forestry and Wood Sciences, Czech University of Life Sciences.
Current teaching:
- GV2006 Project in Earth Sciences
- GV1410 Geovetenskap: Grundkurs
-
A definition and standardised terminology for Blue Intensity from
Conifers
Jesper Björklund, Kristina Seftigen, Ryszard J. Kaczka, Miloš Rydval, Rob Wilson
Dendrochronologia - 2024 -
Historical Soil Moisture Variability in High-Latitude Humid Regions: Insights From a Paleoclimate Data-Model
Comparison
Lu Wang, Hongyan Liu, Kristina Seftigen, Deliang Chen, Congxi Fang, Boyi Liang, Yuemin Yue, Kelin Wang
EARTHS FUTURE - 2024 -
Recent human-induced atmospheric drying across Europe unprecedented in the last 400
years
Kerstin Treydte, Laibao Liu, Ryan S. Padron, Elisabet Martinez-Sancho, Flurin Babst, David C. Frank, Arthur Gessler, Ansgar Kahmen, Benjamin Poulter, Sonia I. Seneviratne, Annemiek I. Stegehuis, Rob Wilson, Laia Andreu-Hayles, Roderick Bale, Zdzislaw Bednarz, Tatjana Boettger, Frank Berninger, Ulf Buentgen, Valerie Daux, Isabel Dorado-Linan, Jan Esper, Michael Friedrich, Mary Gagen, Michael Grabner, Hakan Grudd, Bjoern E. Gunnarsson, Emilia Gutierrez, Polona Hafner, Marika Haupt, Emmi Hilasvuori, Ingo Heinrich, Gerhard Helle, Risto Jalkanen, Hoegne Jungner, Maarit Kalela-Brundin, Andreas Kessler, Andreas Kirchhefer, Stephan Klesse, Marek Krapiec, Tom Levanic, Markus Leuenberger, Hans W. Linderholm, Danny Mccarroll, Valerie Masson-Delmotte, Slawomira Pawelczyk, Anna Pazdur, Octavi Planells, Rutile Pukiene, Katja T. Rinne-Garmston, Iain Robertson, Antonio Saracino, Matthias Saurer, Gerhard H. Schleser, Kristina Seftigen, Rolf T. W. Siegwolf, Eloni Sonninen, Michel Stievenard, Elzbieta Szychowska-Krapiec, Malgorzata Szymaszek, Luigi Todaro, John S. Waterhouse, Martin Weigl-Kuska, Rosemarie B. Weigt, Rupert Wimmer, Ewan J. Woodley, Adomas Vitas, Giles Young, Neil J. Loader
NATURE GEOSCIENCE - 2024 -
Picea schrenkiana tree ring blue intensity reveal recent glacier mass loss in High Mountain Asia is unprecedented within the last four
centuries
Weipeng Yue, Kristina Seftigen, Feng Chen, Rob Wilson, Heli Zhang, Yunling Miao, Youping Chen, Xiaoen Zhao
Global and Planetary Change - 2023 -
Fennoscandian tree-ring anatomy shows a warmer modern than medieval
climate.
Jesper Björklund, Kristina Seftigen, Markus Stoffel, Marina V Fonti, Sven Kottlow, David C Frank, Jan Esper, Patrick Fonti, Hugues Goosse, Håkan Grudd, Björn E Gunnarson, Daniel Nievergelt, Elena Pellizzari, Marco Carrer, Georg von Arx
Nature - 2023 -
Drought variations in the southeastern Tibetan Plateau region since 1704 and their link to the Atlantic Multidecadal
Oscillation
Wanru Tang, Keyan Fang, Zepeng Mei, Feifei Zhou, Hao Wu, Kristina Seftigen, Xinguang Cao, Zhipeng Dong, Maowei Bai, Yao Chen
Palaeogeography, Palaeoclimatology, Palaeoecology - 2023 -
Partly decoupled tree-ring width and leaf phenology response to 20th century temperature change in
Sweden
Petter Stridbeck, Jesper Björklund, Mauricio Fuentes, Björn E. Gunnarson, Anna Maria Jönsson, Hans W. Linderholm, Fredrik Charpentier Ljungqvist, Cecilia Olsson, David Rayner, Eva Rocha, Peng Zhang, Kristina Seftigen
Dendrochronologia - 2022 -
Prospects for dendroanatomy in paleoclimatology - a case study on Picea engelmannii from the Canadian
Rockies
Kristina Seftigen, Marina V. Fonti, Brian Luckman, Miloš Rydval, Petter Stridbeck, Georg Von Arx, Rob Wilson, Jesper Björklund
Climate of the Past - 2022 -
The Origin of Tree-Ring Reconstructed Summer Cooling in Northern Europe During the 18th Century Eruption of
Laki
J. Edwards, K. J. Anchukaitis, B. E. Gunnarson, C. Pearson, Kristina Seftigen, G. von Arx, Hans W. Linderholm
Paleoceanography and Paleoclimatology - 2022 -
The spatiotemporal distribution of historical malaria cases in Sweden: a climatic
perspective
Tzu Tung Chen, Fredrik Charpentier Ljungqvist, Helene Castenbrandt, Franziska Hildebrandt, Mathias Mølbak Ingholt, Jenny C Hesson, Johan Ankarklev, Kristina Seftigen, Hans W. Linderholm
Malaria journal - 2021 -
The utility of bulk wood density for tree-ring
research
Jesper Björklund, Georg von Arx, Patrick Fonti, Petter Stridbeck, Tom De Mil, Anna Neycken, Kristina Seftigen
Dendrochronologia - 2021 -
Current understanding of groundwater recharge and groundwater drought in Sweden compared to countries with similar geology and
climate
Roland Barthel, Moa Stangefelt, Markus Giese, Michelle Nygren, Kristina Seftigen, Deliang Chen
Geografiska Annaler: Series A, Physical Geography - 2021 -
Hydroclimate changes over Sweden in the twentieth and twenty-first centuries: a millennium
perspective
Deliang Chen, Peng Zhang, Kristina Seftigen, Tinghai Ou, Markus Giese, Roland Barthel
Geografiska Annaler: Series A, Physical Geography - 2021 -
The influence of decision-making in tree ring-based climate
reconstructions
Ulf Büntgen, Kathy Allen, Kevin J. Anchukaitis, Dominique Arseneault, Étienne Boucher, Achim Bräuning, Snigdhansu Chatterjee, Paolo Cherubini, Olga V. Churakova (Sidorova), Christophe Corona, Fabio Gennaretti, Jussi Grießinger, Sebastian Guillet, Joel Guiot, Björn Gunnarson, Samuli Helama, Philipp Hochreuther, Malcolm K. Hughes, Peter Huybers, Alexander V. Kirdyanov, Paul J. Krusic, Josef Ludescher, Wolfgang J.H. Meier, Vladimir S. Myglan, Kurt Nicolussi, Clive Oppenheimer, Frederick Reinig, Matthew W. Salzer, Kristina Seftigen, Alexander R. Stine, Markus Stoffel, Scott St. George, Ernesto Tejedor, Aleyda Trevino, Valerie Trouet, Jianglin Wang, Rob Wilson, Bao Yang, Guobao Xu, Jan Esper
Nature Communications - 2021 -
Using Blue Intensity from drought-sensitive Pinus sylvestris in Fennoscandia to improve reconstruction of past hydroclimate
variability
Kristina Seftigen, Mauricio Fuentes, Fredrik Charpentier Ljungqvist, Jesper Björklund
Climate Dynamics - 2020 -
Ranking of tree-ring based hydroclimate reconstructions of the past
millennium
Fredrik Charpentier Ljungqvist, Alma Piermattei, Andrea Seim, Paul J. Krusic, Ulf Büntgen, Minhui He, Alexander V. Kirdyanov, Jürg Luterbacher, Lea Schneider, Kristina Seftigen, David W. Stahle, Ricardo Villalba, Bao Yang, Jan Esper
Quaternary Science Reviews - 2020 -
Assessing non-linearity in European temperature-sensitive tree-ring
data
Fredrik Charpentier Ljungqvist, Peter Thejll, Jesper Björklund, Björn E. Gunnarson, Alma Piermattei, Miloš Rydval, Kristina Seftigen, Bård Støve, Ulf Büntgen
Dendrochronologia - 2020 -
Ensemble standardization constraints on the influence of the tree growth trends in
dendroclimatology
F. Shi, B. Yang, Hans W. Linderholm, Kristina Seftigen, F. M. Yang, Q. Z. Yin, X. M. Shao, Z. T. Guo
Climate Dynamics - 2020 -
Dendroclimatic potential of dendroanatomy in temperature-sensitive Pinus
sylvestris
Jesper Björklund, Kristina Seftigen, Patrick Fonti, Daniel Nievergelt, Georg von Arx
Dendrochronologia - 2020 -
European warm-season temperature and hydroclimate since 850
CE
F. C. Ljungqvist, A. Seim, P. J. Krusic, J. F. Gonzalez-Rouco, J. P. Werner, E. R. Cook, E. Zorita, J. Luterbacher, E. Xoplaki, G. Destouni, E. Garcia-Bustainante, C. A. M. Aguilar, Kristina Seftigen, J. L. Wang, M. H. Gagen, J. Esper, O. Solomina, D. Fleitmann, U. Buntgen
Environmental Research Letters - 2019 -
Disentangling the multi-faceted growth patterns of primary Picea abies forests in the Carpathian
arc
Jesper Björklund, Miloš Rydval, Jonathan S. Schurman, Kristina Seftigen, Volodymyr Trotsiuk, Pavel Janda, Martin Mikoláš, Martin Dušátko, Vojtěch Čada, Radek Bače, Miroslav Svoboda
Agricultural and Forest Meteorology - 2019 -
The climatic drivers of normalized difference vegetation index and tree‐ring‐based estimates of forest productivity are spatially coherent but temporally decoupled in Northern Hemispheric
forests
Kristina Seftigen, David Frank, Jesper Björklund, Flurin Babst, Benjamin Poulter
Global Ecology and Biogeography - 2018 -
A 970-year-long summer temperature reconstruction from Rogen, west-central Sweden, based on blue intensity from tree
rings
Mauricio Fuentes, Riikka Salo, Jesper Björklund, Kristina Seftigen, Peng Zhang, Björn Gunnarson, Juan-Carlos Aravena, Hans W. Linderholm
The Holocene - 2018 -
Arctic hydroclimate variability during the last 2000 years – current understanding and research
challenges
Hans W. Linderholm, Marie Nicolle, Pierre Francus, Konrad Gajewski, Samuli Helama, Atte Korhola, Olga Solomina, Zicheng Yu, Peng Zhang, William J. D’Andrea, Maxime Debret, Dmitry V. Divine, Björn E. Gunnarson, Neil J. Loader, Nicolas Massei, Kristina Seftigen, Elizabeth K. Thomas, Johannes Werner, Sofia Andersson, Annika Berntsson, Tomi P. Luoto, Liisa Nevalainen, Saija Saarni, Minna Väliranta
Climate of the Past - 2018 -
When tree rings go global: Challenges and opportunities for retro- and prospective
insight
F. Babst, P. Bodesheim, N. Charney, A. D. Friend, M. P. Girardin, S. Klesse, D. J. P. Moore, Kristina Seftigen, J. Björklund, O. Bouriaud, A. Dawson, R. J. DeRose, M. C. Dietze, A. H. Eckes, B. Enquist, D. C. Frank, M. D. Mahecha, B. Poulter, S. Record, V. Trouet, R. H. Turton, Z. Zhang, M. E. K. Evans
Quaternary Science Reviews - 2018 -
Assessing forest vulnerability to climate warming using a process-based model of tree growth: bad prospects for
rear-edges
Raúl Sánchez-Salguero, Jesus Julio Camarero, Emilia Gutiérrez, Fidel González Rouco, Antonio Gazol, Gabriel Sangüesa-Barreda, Laia Andreu-Hayles, Juan Carlos Linares, Kristina Seftigen
Global Change Biology - 2017 -
Hydroclimate variability in Scandinavia over the last millennium - Insights from a climate model-proxy data
comparison
Kristina Seftigen, Hugues Goosse, Francois Klein, Deliang Chen
Climate of the Past - 2017 -
Cell size and wall dimensions drive distinct variability of earlywood and latewood density in Northern Hemisphere
conifers
J. Bjorklund, Kristina Seftigen, F. Schweingruber, P. Fonti, G. von Arx, M. V. Bryukhanova, H. E. Cuny, M. Carrer, D. Castagneri, D. C. Frank
New Phytologist - 2017 -
A comparison between Tree-Ring Width and Blue Intensity high and low frequency signals from Pinus sylvestris L. from the Central and Northern Scandinavian
Mountains
Mauricio Fuentes, Hans W. Linderholm, Kristina Seftigen, Jesper Björklund, Björn E Gunnarson, Juan Aravena
TRACE - Tree Rings in Archaeology, Climatolog y and Ecology, Volume 14. Scien tific Technical Report 16/04, GFZ German Research Centre for Geosciences, p. 38-43. doi: 10.2312/GFZ.b103-16042. - 2016 -
Old World megadroughts and pluvials during the Common
Era
ER Cook, R Seager, Y Kushnir, KR Briffa, U Buntgen, D Frank, PJ Krusic, W Tegel, G van der Schrier, L Andreu-Hayles, M Baillie, C Baittinger, N Bleicher, N Bonde, D Brown, M Carrer, R Cooper, K Cufar, C Dittmar, J Esper, C Griggs, B Gunnarson, B Gunther, E Guiterrez, K Haneca, S Helama, F Herzig, K-U Heussner, J Hoffman, P Janda, R Kontic, N Köse, T Kyncl, T Levanic, Hans W. Linderholm, S Manning, TM Melvin, D Miles, B Neuwirth, K Nicolussi, P Nola, M Panayotov, I Popa, A Rothe, Kristina Seftigen, Andrea Seim, H Svarva, M Svoboda, T Thun, M Timonen, R Touchan, V Trotsiuk, V Trouet, F Walder, T Wazny, R Wilson, C Zhang
Science Advances - 2015 -
A tree-ring field reconstruction of Fennoscandian summer hydroclimate variability for the last
millennium
Kristina Seftigen, Jesper Björklund, Cook Edward, Hans W. Linderholm
Climate Dynamics - 2015 -
Fennoscandia revisited: a spatially improved tree‑ring reconstruction of summer temperatures for the last 900
years
Hans W. Linderholm, Jesper Björklund, Kristina Seftigen, Björn Gunnarson, Mauricio Fuentes
Climate Dynamics - 2015 -
The Potential of Deriving Tree-Ring-Based Field Reconstructions of Droughts and Pluvials over
Fennoscandia
Kristina Seftigen, E. R. Cook, Hans W. Linderholm, Mauricio Fuentes, Jesper Björklund
Journal of Climate - 2015 -
Using adjusted Blue Intensity data to attain high-quality summer temperature information: A case study from Central
Scandinavia
Jesper Björklund, Björn Gunnarson, Kristina Seftigen, Peng Zhang, Hans W. Linderholm
The Holocene - 2015 -
Growth dynamics of tree-line and lake-shore Scots pine (Pinus sylvestris L.) in the central Scandinavian Mountains during the Medieval Climate Anomaly and the early Little Ice
Age
Hans W. Linderholm, Peng Zhang, Björn Gunnarson, Jesper Björklund, Emad Farahat, Mauricio Fuentes, Eva Rocha, Riikka Salo, Kristina Seftigen, Petter Stridbeck, Yu Liu
Frontiers in Ecology and Evolution - 2014 -
Late Holocene spatiotemporal hydroclimatic variability over Fennoscandia inferred from
tree-rings
Kristina Seftigen
2014 -
Blue intensity and density from Northern Fennoscandian tree rings, exploring the potential to improve summer temperature reconstructions with earlywood
information
Jesper Björklund, Björn Gunnarson, Kristina Seftigen, Jan Esper, Hans W. Linderholm
Climate of the Past - 2014 -
Reconstructed drought variability in southeastern Sweden since the
1650s
Kristina Seftigen, Hans W. Linderholm, Igor Drobyshev, Mats Niklasson
International Journal of Climatology - 2013 -
Radial growth of Norway spruce and Scots pine: effects of nitrogen deposition
experiments
Kristina Seftigen, Filip Moldan, Hans W. Linderholm
European Journal of Forest Research - 2013 -
The influence of climate on 13C/12C and 18O/16O ratios in tree ring cellulose of Pinus sylvestris growing in the central Scandinavian
Mountains
Kristina Seftigen, Hans W. Linderholm, N Loader, Y Liu, G.H.F Young
Chemical Geology - 2011 -
Reconstruction of regional drought index in southern Sweden since 1750
AD
I Drobyshev, M Niklasson, Hans W. Linderholm, Kristina Seftigen, T Hickler, O Eggertsson
The Holocene - 2011 -
Dendroclimatology in Fennoscandia – from past accomplishments to future
potential
Hans W. Linderholm, Jesper Björklund, Kristina Seftigen, Björn E Gunnarson, Håkan Grudd, Jee-Hoon Jeong, Igor Drobyshev, Yu Liu
Climate of the Past - 2010 -
Temperature variations recorded in Pinus tabulaeformis tree rings from the southern and northern slopes of the central Qinling Mountains, central
China
Yu Liu, Hans W. Linderholm, Huiming Song, Qiufang Cai, Qinhua Tian, Junyan Sun, Deliang Chen, Elisabeth Simelton, Kristina Seftigen, Hua Tian, Ruiyuan Wang, Guang Bao, Zhisheng An
BOREAS - 2009 -
Temperature variations recorded in Pinus tabulaeformis tree rings from the southern and northern slopes of the central Qinling Mountains, central
China.
Y Liu, Hans W. Linderholm, H. Song, Q. Cai, Q. Tian, J. Sun, Deliang Chen, Elisabeth Simelton, Kristina Seftigen, H. Tian, R. Wang, G. Bao, Z. An
Boreas - 2009 -
Dendroclimatology in Fennoscandia – from past accomplishments to future
potentials
Hans W. Linderholm, Jesper Björklund, Kristina Seftigen, Björn E Gunnarson, Igor Drobyshev, Jee-Hoon Jeong, Petter Stridbeck, Yu Liu
Climate of the past Discussions - 2009 -
Effects of experimental nitrogen addition, liming and reduced acid deposition on radial growth of Norway spruce and Scots pine at Gårdsjön,
Sweden
Kristina Seftigen
2008 -
Potential lateral expansion of wetlands in the county of Västra Götaland,
Sweden
Kristina Seftigen
2007