Laia is a Lamont Associate Research Professor in the Division of Biology and Paleo-Environment and member of the Tree-Ring Lab. Her Fields of interest range from Dendroclimatology, Paleoclimatology and Ecology in Mediterranean, to Boreal and Tropical ecosystems. You can read more about her background and work at
https://andreu-hayles.ldeo.columbia.edu/people/laia-andreu-hayles
Introductory slide show (pptx) (pdf)
Current anthropogenic environmental changes are indisputable and are strongly impacting the Earth’s climatic system, ecosystem services, and water resources, while potentially jeopardizing the well-being of human populations worldwide. While the highest rates of increasing temperatures across the planet are occurring in the Artic and sub-artic regions, little is known about how the tropical forests, a stockpile of carbon and greatly affected by deforestation, are responding to global warming. In mid-latitudes, places in the Mediterranean or inner Asia are predicted to suffer even higher warming trends than those observed today. Historic changes in past climate have been associated with the demise of civilizations, expansion of Empires, technological developments, infrastructure destruction, and other relevant issues for societies. It is therefore paramount that we provide a knowledge-based understanding of this global change in a long-term context. Tree rings record interactions between the atmosphere and the biosphere, and thus, are exceptional sources of information on the Earth’s environmental history. This presentation will show several case studies of how tree rings can inform us about environmental changes using parameters such as ring-width, carbon (d13C) and oxygen (d18O) stable isotopes, radiocarbon (14C) and Blue Intensity (BI). BI is a less expensive and labor-intensive tool than the classical proxy for density. The study sites are located in a diverse range of ecosystems from the boreal forest of Alaska to the tropical Andes of South America, and the temperate mesic forests of the northeastern U.S. to pine forests of the Iberian Peninsula. Lessons from the past learned from tree rings can aid to design a sustainable management of natural resources taking into account natural climate fluctuations in conjunction with changes in societal needs.
Main Projects Funding this Research
NSF AGS #1702789
Collaborative Research: Reconstructing South American monsoon sensitivity to internal and external forcing: reconciling models and tree-ring proxies in the Central Andes
NSF AGS 1903687 https://www.nsf.gov/awardsearch/showAward?AWD_ID=1903687
Collaborative Research: Reconstructing atmospheric 14C across the Inter Tropical Convergence Zone using tropical tree rings from South America and Central Africa
NSF OPP # 1504134. https://www.nsf.gov/awardsearch/showAward?AWD_ID=1504134
Response of High-latitude Forests to a Warmer and CO2-enriched Atmosphere: Tree Rings in a Process-based Model
NSF OPP # 1737788
https://www.nsf.gov/awardsearch/showAward AWD_ID=1737788&HistoricalAwards=false
Collaborative Research: Climate, human and ecosystem interactions in the face of a rapidly changing North Asian biome
Additional Resources
Scientific Papers
Andreu-Hayles, Laia and Levesque, Mathieu and Martin-Benito, Dario and Huang, Wei and Harris, Ryan and Oelkers, Rose and Leland, Caroline and Martin-Fernández, Javier and Anchukaitis, Kevin J. and Helle, Gerhard “A high yield cellulose extraction system for small whole wood samples and dual measurement of carbon and oxygen stable isotopes” Chemical Geology , v.504 ,
2019 https://doi.org/10.1016/j.chemgeo.2018.09.007Citation Details
Santos, Guaciara M. and Granato-Souza, Daniela and Barbosa, Ana Carolina and Oelkers, Rose and Andreu-Hayles, Laia “Radiocarbon analysis confirms annual periodicity in Cedrela odorata tree rings from the equatorial Amazon” Quaternary Geochronology , v.58 ,
2020 https://doi.org/10.1016/j.quageo.2020.101079Citation Details
https://www.sciencedirect.com/science/article/pii/S1125786517301261
Silva, Vivian B.S. and Kousky, V.E. The southern Monsoon System: Cliamtology amnd Variability
Rodriguez-Caton, Milagros and Andreu-Hayles, Laia and Morales, Mariano S and Daux, Valérie and Christie, Duncan A and Coopman, Rafael E and Alvarez, Claudio and Rao, Mukund Palat and Aliste, Diego and Flores, Felipe and Villalba, Ricardo “Different climate sensitivity for radial growth, but uniform for tree-ring stable isotopes along an aridity gradient in Polylepis tarapacana , the world’s highest elevation tree species” Tree Physiology ,
2021 https://doi.org/10.1093/treephys/tpab021Citation Details
Readings and Activities
https://www.ldeo.columbia.edu/tree-ring-laboratory/
Tree Rings and Dendrochronology: Science Project for Kids
Past Climates: Tree Thermometers, Commodities, and People
Tree Rings Simulation – Dendrochronology | UCAR Center for Science Education