Results 31 to 40 of about 732,533 (207)

Radiocarbon releases from the 2011 Fukushima nuclear accident [PDF]

, 2016
Radiocarbon activities were measured in annual tree rings for the years 2009 to 2015 from Japanese cedar trees (Cryptomeria japonica) collected at six sites ranging from 2.5–38 km northwest and north of the Fukushima Dai-ichi nuclear power plant. The 14C
Cook, Gordon T., Cresswell, Alan, Dunbar, Elaine, Freeman, Stewart P.H.T., Hou, Xiaolin, Jacobsson, Piotr, Kinch, Helen R., Naysmith, Philip, Sanderson, David C.W., Tripney, Brian G., Xu, Sheng   +10 more
core   +2 more sources

Annual rings inBeilschmiedia tawa(Lauraceae) [PDF]

New 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

Determination of Beech (Fagas oricffiolis Lipsky) seeding cycle at caspian Forests of Iran (Kelardasht) [PDF]

تحقیقات جنگل و صنوبر ایران, 1999
The research project of determining Beech seeding cycle was conducted at Kelardasht region of Caspian Forests. Thirty dominant Beech trees were selected for quantity and quality measurement.
Ali Reza Mirbadin, Yousef Gorji Bahri, manochehr namiranian   +2 more
doaj   +1 more source

A century of tree line changes in sub-Arctic Sweden shows local and regional variability and only a minor influence of 20th century climate warming [PDF]

, 2011
Aim Models project that climate warming will cause the tree line to move to higher elevations in alpine areas and more northerly latitudes in Arctic environments.
Callaghan, Terry V, De Dapper, Morgan, Haneca, Kristof, Hoogesteger, Jan, Jonasson, Christer, Van Bogaert, Rik   +5 more
core   +1 more source

Seasonal divergence between soil water availability and atmospheric moisture recorded in intra-annual tree-ring δ18O extremes

Environmental Research Letters, 2020
Intra-annual variability of tree-ring oxygen stable isotopes (δ ^18 O) can record seasonal climate variability and a tree’s ecophysiological response to it.
Guobao Xu, Xiaohong Liu, Weizhen Sun, Paul Szejner, Xiaomin Zeng, Kei Yoshimura, Valerie Trouet   +6 more
doaj   +1 more source

ВЛИЯНИЕ КЛИМАТИЧЕСКИХ ФАКТОРОВ НА СПЕКТРАЛЬНЫЕ ХАРАКТЕРИСТИКИ ГОДИЧНЫХ КОЛЕЦ БЕРЕЗЫ ИЗВИЛИСТОЙ

Cifra: Биологические науки
Для изучения климатической реакции основных полимерных компонентов клеточной стенки в годичных кольцах у березы извилистой Betula Tortuosa Ledeb., произрастающей в экотоне альпийской лесотундры Кузнецкого Алатау, впервые использован метод инфракрасной ...
Тютькова Е., Лоскутов С.   +1 more
doaj   +1 more source

Within-tree radial and among-family variations in wood density, microfibril angle, and mechanical properties in Picea glehnii

Silva Fennica, 2018
Genetic improvements in the mechanical properties of wood are important in forestry species used for lumber, such as . The within-tree radial and among-family variations for the modulus of elasticity (MOE), modulus of rupture (MOR), and their related ...
Jun Tanabe, Futoshi Ishiguri, Akira Tamura, Yuya Takashima, Jyunichi Ohshima, Kazuya Iizuka, Shinso Yokota   +6 more
doaj   +1 more source

Annual Rings of Growth in Carboniferous Wood [PDF]

Botanical Gazette, 1921
In a discussion of anatomical structure and climatic evolution, JEFFREY, emphasizes the absence of annual rings in Cordaitean wood from the Carboniferous in latitudes south of England as indicative of uniformity of climate, in contrast with the conditions in the Triassic period, in which coniferous wood with annual rings is found as far south as ...
openaire   +1 more source

Growth Rings in the Stem of Thuja orientalis L.

International Journal of Horticultural Science, 2000
During the winter dormancy period of 1998-99, the differentiation process of xylem and the formation of annual and pseudo-annual growth rings was studied in sections of the central stem of Thuja orientalis of different age (1-14 year old), starting from ...
G. Schmidt, Gy. Végvári
doaj   +1 more source

Seasonal variations of auxin and gibberellin A4 levels in cambial-region tissues of three conifers (Pinus elliottii, Chamaecyparis obtusa, and Cryptomeria japonica) with inherently different wood densities

Journal of Wood Science, 2021
We previously reported the species-specific annual ring formation characteristics of three conifers (slash pine (Pinus elliottii), hinoki (Japanese cypress, Chamaecyparis obtusa) and sugi (Japanese cedar, Cryptomeria japonica)) grown in the same stand ...
Yoshio Kijidani, Taku Tsuyama, Katsuhiko Takata   +2 more
doaj   +1 more source