Results 11 to 20 of about 155,890 (305)

Annual rings in a native Hawaiian tree, Sophora chrysophylla, on Maunakea, Hawaiʻi [PDF]

Journal of Tropical Ecology, 2015
Annual rings are not commonly produced in tropical trees because they grow in a relatively aseasonal environment. However, in the subalpine zones of Hawaiʻi's highest volcanoes, there is often strong seasonal variability in temperature and rainfall ...
Baker, PJ, Cook, ER, Francisco, KS, Hart, PJ, Li, J   +4 more
core   +4 more sources

Intra-annual density fluctuations in tree rings are proxies of air temperature across Europe

Scientific Reports, 2023
Intra-Annual Density Fluctuations (IADFs) are an important wood functional trait that determine trees’ ability to adapt to climatic changes. Here, we use a large tree-ring database of 11 species from 89 sites across eight European countries, covering a ...
G. Battipaglia, J. P. Kabala, A. Pacheco-Solana, F. Niccoli, A. Bräuning, F. Campelo, K. Cufar, M. de Luis, V. De Micco, M. Klisz, M. Koprowski, I. Garcia-Gonzalez, C. Nabais, J. Vieira, P. Wrzesiński, N. Zafirov, P. Cherubini   +16 more
doaj   +7 more sources

Findings from an in-Depth Annual Tree-Ring Radiocarbon Intercomparison [PDF]

Radiocarbon, 2020
ABSTRACTThe radiocarbon (14C) calibration curve so far contains annually resolved data only for a short period of time. With accelerator mass spectrometry (AMS) matching the precision of decay counting, it is now possible to efficiently produce large datasets of annual resolution for calibration purposes using small amounts of wood.
Wacker, L, Scott, EM, Bayliss, A, Brown, D, Bard, E, Bollhalder, S, Friedrich, M, Capano, M, Cherkinsky, A, Chivall, D, Culleton, BJ, Dee, MW, Friedrich, R, Hodgins, GWL, Hogg, A, Kennett, DJ, Knowles, TDJ, Kuitems, M, Lange, TE, Miyake, F, Nadeau, M-J, Nakamura, T, Naysmith, JP, Olsen, J, Omori, T, Petchey, F, Philippsen, B, Ramsey, CB, Prasad, GVR, Seiler, M, Southon, J, Staff, R, Tuna, T   +32 more
openaire   +10 more sources

Securing timelines in the ancient Mediterranean using multiproxy annual tree-ring data [PDF]

Proceedings of the National Academy of Sciences, 2020
Significance This study demonstrates how different lines of evidence from tree rings in widely spread growth locations can combine to fix an approximately dated tree-ring record from the East Mediterranean Bronze–Iron Age to an exact calendar-dated range.
Charlotte Pearson, Matthew Salzer, Lukas Wacker, Peter Brewer, Adam Sookdeo, Peter Kuniholm   +5 more
openaire   +3 more sources

Nonannual tree rings in a climate-sensitive Prioria copaifera chronology in the Atrato River, Colombia [PDF]

, 2017
In temperate climates, tree growth dormancy usually ensures the annual nature of tree rings, but in tropical environments, determination of annual periodicity can be more complex.
Andreu-Hayles, Laia, del Valle, Jorge I., Gonzalez, Paula L. M., Herrera-Ramirez, David, Santos, Guaciara M.   +4 more
core   +1 more source

Influence of position within the tree stem according to growth-ring width of spruce (Picea abies /L./ KARST.) with compression wood

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2004
The work was focused on problematics of annual-rings width according to position within the tree stem. Annual-ring widths, ratio of late wood and early wood by spruce with compression wood were investigated.
Vladimír Gryc, Jiří Holan
doaj   +1 more source

Growing season thermal climate reconstructed at six pine stands in northern Lapland [PDF]

Bulletin of the Geological Society of Finland, 1994
At the northern coniferous timberline of the boreal region, growing season temperature is generally the major environmental factor limiting the growth processes of Scots pine (Pinus sylvestris L.). Variations in annual ring-widths of pines can be related
M. Lindholm, J. Meriläinen
doaj   +1 more source

Juniper from Ethiopia contains a large-scale precipitation signal [PDF]

, 2008
Most semiarid regions are facing an increasing scarcity of woody vegetation due mainly to anthropogenic deforestation aggravated by climate changes. However, there is insufficient information to reconstruct past changes in climate and to evaluate the ...
Couralet, C., Sahle, Y., Sass-Klaassen, U., Sterck, F.J.   +3 more
core   +2 more sources

Sample Collection and Preparation for Annual and Intra-annual Tree-Ring Isotope Chronologies

, 2022
AbstractThis chapter provides guidance for conducting studies based on stable isotope measurements in tree rings to infer past and present climate variability and ecophysiology. Balancing theoretical perspectives of stable isotope variations recorded in tree rings, intended research applications (paleoclimate or ecophysiology) and resource limitations,
Soumaya Belmecheri, William E. Wright, Paul Szejner   +2 more
openaire   +1 more source

Energetic impact of reconstructed debris flow on the intensity and duration of growth disturbances in tree rings

Frontiers in Earth Science, 2023
A rare study on the quantitative relationship between the energetic impact of debris flows on the intensity and duration of growth disturbances of tree rings was carried out, partly due to a lack of feasible approaches and detailed field evidence.
Xueliang Wang, Xueliang Wang, Xueliang Wang, Juanjuan Sun, Juanjuan Sun, Juanjuan Sun, Yong Zhang, Qisong Jiao, Shengwen Qi, Shengwen Qi, Shengwen Qi, Ran Wang, Haiyang Liu, Mengjie Zhang, Mengjie Zhang, Mengjie Zhang   +15 more
doaj   +1 more source