M
Mary Gagen
Researcher at Swansea University
Publications - 48
Citations - 2988
Mary Gagen is an academic researcher from Swansea University. The author has contributed to research in topics: Dendroclimatology & Climate change. The author has an hindex of 27, co-authored 46 publications receiving 2623 citations.
Papers
More filters
Journal ArticleDOI
European summer temperatures since Roman times
Jürg Luterbacher,Johannes P. Werner,Jason E. Smerdon,Laura Fernández-Donado,Fidel González-Rouco,David Barriopedro,Fredrik Charpentier Ljungqvist,Ulf Büntgen,Eduardo Zorita,Sebastian Wagner,Jan Esper,Danny McCarroll,Andrea Toreti,David Frank,Johann H. Jungclaus,Mariano Barriendos,Chiara Bertolin,Chiara Bertolin,Oliver Bothe,Rudolf Brázdil,Dario Camuffo,Petr Dobrovolný,Mary Gagen,Elena García-Bustamante,Quansheng Ge,Juan José Gómez-Navarro,Juan José Gómez-Navarro,Joel Guiot,Z. Hao,Gabriele C. Hegerl,Karin Holmgren,V.V. Klimenko,Javier Martín-Chivelet,Christian Pfister,Neil Roberts,Anne Schindler,Andrew Schurer,Olga Solomina,L. von Gunten,Eugene R. Wahl,Heinz Wanner,Oliver Wetter,Elena Xoplaki,Naiming Yuan,Davide Zanchettin,Huan Zhang,Christos Zerefos +46 more
TL;DR: In this paper, a new proxy-based, annually-resolved, spatial reconstruction of the European summer (June-August) temperature fields back to 755 CE based on Bayesian hierarchical modeling (BHM), together with estimates of European mean temperature variation since 138 BCE based on BHM and composite-plus-scaling (CPS).
Journal ArticleDOI
Correction of tree ring stable carbon isotope chronologies for changes in the carbon dioxide content of the atmosphere
Danny McCarroll,Mary Gagen,Neil J. Loader,Iain Robertson,Kevin J. Anchukaitis,Sietse O. Los,Giles H.F. Young,Risto Jalkanen,Andreas Kirchhefer,John S. Waterhouse +9 more
TL;DR: In this paper, the authors proposed a correction procedure that attempts to calculate the δ13C values that would have been obtained under pre-industrial conditions using nonlinear regression, but the magnitude of the adjustment made is restricted by two logical constraints based on the physiological response of trees.
Journal Article
Correction of tree ring stable carbon isotope chronologies for changes in the carbon dioxide content of the atmosphere , Geochimica et Cosmochimica Acta 73, 1539-1547
Danny McCarroll,Mary Gagen,Neil J. Loader,Iain Robertson,Kevin J. Anchukaitis,Sietse O. Los,Giles H.F. Young,Risto Jalkanen,Andreas Kirchhefer,John S. Waterhouse +9 more
TL;DR: In this article, the authors proposed a correction procedure that attempts to calculate the δ13C values that would have been obtained under pre-industrial conditions using nonlinear regression, but the magnitude of the adjustment made is restricted by two logical constraints based on the physiological response of trees.
Journal ArticleDOI
Exorcising the `segment length curse': summer temperature reconstruction since AD 1640 using non-detrended stable carbon isotope ratios from pine trees in northern Finland
Mary Gagen,Danny McCarroll,Neil J. Loader,Iain Robertson,Risto Jalkanen,Kevin J. Anchukaitis +5 more
TL;DR: In this paper, stable carbon isotope ratios from the latewood cellulose of 12 trees from two sites in northern Finland are used to construct an isotope chronology covering AD 1640 to 2002.
Journal ArticleDOI
Spatial variability and temporal trends in water-use efficiency of European forests
Matthias Saurer,Renato Spahni,Renato Spahni,David Frank,Fortunat Joos,Fortunat Joos,Markus Leuenberger,Neil J. Loader,Danny McCarroll,Mary Gagen,Ben Poulter,Rolf T. W. Siegwolf,Laia Andreu-Hayles,Tatjana Boettger,Isabel Dorado Liñán,Isabel Dorado Liñán,Ian J. Fairchild,Michael Friedrich,Emilia Gutiérrez,Marika Haupt,Emmi Hilasvuori,Emmi Hilasvuori,Ingo Heinrich,Gerd Helle,Håkan Grudd,Risto Jalkanen,Tom Levanič,Hans W. Linderholm,Iain Robertson,Eloni Sonninen,Kerstin Treydte,John S. Waterhouse,Ewan J. Woodley,Ewan J. Woodley,Peter M. Wynn,Giles H.F. Young +35 more
TL;DR: It is demonstrated that the combined effects of increasing CO2 and climate change leading to soil drying have resulted in an accelerated increase in iWUE, which will help to reduce uncertainties in the land surface schemes of global climate models, where vegetation-climate feedbacks are currently still poorly constrained by observational data.