Results 31 to 40 of about 2,951,677 (344)

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

open access: yes, 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.   +3 more
core   +2 more sources

Seasonal variations in the stable oxygen isotope ratio of wood cellulose reveal annual rings of trees in a Central Amazon terra firme forest

open access: yesOecologia, 2015
In Amazonian non-flooded forests with a moderate dry season, many trees do not form anatomically definite annual rings. Alternative indicators of annual rings, such as the oxygen (δ18Owc) and carbon stable isotope ratios of wood cellulose (δ13Cwc), have ...
S. Ohashi   +7 more
semanticscholar   +1 more source

Monthly paleostreamflow reconstruction from annual tree-ring chronologies

open access: yesJournal of Hydrology, 2018
Abstract Paleoclimate reconstructions are increasingly used to characterize annual climate variability prior to the instrumental record, to improve estimates of climate extremes, and to provide a baseline for climate-change projections. To date, paleoclimate records have seen limited engineering use to estimate hydrologic risks because water systems ...
Stagge, James H.   +3 more
openaire   +4 more sources

Tree-ring chronologies as an indicator of fluctuation of water level in the Andreevskoe lake system in the beginning of the XIX — XXI century

open access: yesВестник археологии, антропологии и этнографии, 2017
The article analyzes tree-ring chronologies of contemporary pines growing on different hypsometric marks in relation to the modern level of the Andreevskoe lakes, on the low-ridges of terrace-like formations, floodplain lowlands and riams.
Arefyev S.P., Zakh V.A.
doaj   +1 more source

Chronological levels of As, Pd, V, and Sr in 356-year-old Pinus nigra annual rings in Northern Türkiye

open access: yesBioResources
The accumulation and allocation of heavy metals—arsenic (As), strontium (Sr), palladium (Pd), and vanadium (V)—were measured in Pinus nigra wood over more than three centuries.
I. Koc
semanticscholar   +1 more source

Annual rings inBeilschmiedia tawa(Lauraceae) [PDF]

open access: yesNew Zealand Journal of Botany, 1981
Abstract Evidence is presented that the growth rings in the wood of fast growing tawa are annual. Diameter growth rates oftawa are variable but usually 1–4 mm yr-1 in trees > 20 cm diameter at 1.4 m height. Tawa probably has maximum longevity in the range 300–400 years.
Ogden, J., West, C.J.
openaire   +1 more source

Tree ring analysis of Brachystegia spiciformis and Isoberlinia tomentosa: Evaluation of the enso-signal in the miombo woodland of eastern Africa [PDF]

open access: yes, 2001
The value of growth rings as proxy data for climate reconstruction was studied in two miombo woodland species in eastern Africa. Growth rings, marked by terminal parenchyma, were visually detectable on carefully prepared stem discs of Isoberlinia ...
Beeckman, Hans   +3 more
core   +2 more sources

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

open access: yesActa 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

SabaTracheid 1.0: A Novel Program for Quantitative Analysis of Conifer Wood Anatomy — A Demonstration on African Juniper From the Blue Nile Basin

open access: yesFrontiers in Plant Science, 2021
Knowledge about past climates, especially at a seasonal time scale, is important as it allows informed decisions to be made to mitigate future climate change.
Eyob Gebrehiwot Gebregeorgis   +5 more
doaj   +1 more source

Submergence and uplift associated with the giant 1833 Sumatran subduction earthquake: Evidence from coral microatolls [PDF]

open access: yes, 1999
The giant Sumatran subduction earthquake of 1833 appears as a large emergence event in fossil coral microatolls on the reefs of Sumatra's outer-arc ridge.
Edwards, R. Lawrence   +4 more
core   +1 more source

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