Radiocarbon concentration in modern tree rings from Valladolid, Spain

Rakowski, Andrzej; Nakamura, Toshio; Pazdur, Anna; Charro, E.; Villanueva, José Luis Gutiérrez; Piotrowska, Natalia

doi:10.1016/j.nimb.2009.10.111

Cited by 16 publications

(10 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Oak, on the other hand, used by Usoskin et al [2013] and Rakowski et al [2015], is a ring-porous angiosperm (also called hardwood or deciduous tree) [Ladefoged, 1952;Speer, 2010]. Studies of modern Δ 14 C values in earlywood and latewood fractions from gymnosperms, in particular, cedar [Yamada et al, 2008;Rakowski et al, 2010] and pine trees [Sheng et al, 2016], suggest that both fractions are consistent with the average atmospheric Δ 14 C value of the warm summer months (May-September) during the year of formation. The cell types forming gymnosperms are generally simpler than the cell types in angiosperms.…”

Section: Tree Physiologymentioning

confidence: 99%

Cosmic ray event in 994 C.E. recorded in radiocarbon from Danish oak

Fogtmann-Schulz

Østbø

Nielsen

et al. 2017

Geophysical Research Letters

View full text Add to dashboard Cite

We present measurements of radiocarbon in annual tree rings from the time period 980–1006 Common Era (C.E.), hereby covering the cosmic ray event in 994 C.E. The new radiocarbon record from Danish oak is based on both earlywood and latewood fractions of the tree rings, which makes it possible to study seasonal variations in 14C production. The measurements show a rapid increase of ∼10‰ from 993 to 994 C.E. in latewood, followed by a modest decline and relatively high values over the ensuing ∼10 years. This rapid increase occurs from 994 to 995 C.E. in earlywood, suggesting that the cosmic ray event most likely occurred during the period between April and June 994 C.E. Our new record from Danish oak shows strong agreement with existing Δ14C records from Japan, thus supporting the hypothesis that the 994 C.E. cosmic ray event was uniform throughout the Northern Hemisphere and therefore can be used as an astrochronological tie point to anchor floating chronologies of ancient history.

show abstract

Section: Tree Physiologymentioning

confidence: 99%

Cosmic ray event in 994 C.E. recorded in radiocarbon from Danish oak

Fogtmann-Schulz

Østbø

Nielsen

et al. 2017

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…Data of CO 2 and radiocarbon concentration levels in clean and polluted areas are constantly monitored by several laboratories around the world, either directly by atmospheric sampling [7][8][9][10][11][12], or in plants [13][14][15][16][17][18][19][20][21][22]. Mathematical equations can be use to estimate the local decrease in radiocarbon concentration due to Suess effect and CO 2 emission.…”

Section: Introductionmentioning

confidence: 99%

Radiocarbon method in environmental monitoring of CO2 emission

Rakowski

Nadeau

Nakamura

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

Self Cite

View full text Add to dashboard Cite

“…The decrease in atmospheric 14 C concentration can be described by an exponential function (Hua et al 1999;Rakowski et al 2010). Results from tree-ring series of Paks NPP and the background station also fit well on an exponential curve, with correlation coefficients of 0.95 and 0.96, respectively.…”

Section: Resultsmentioning

confidence: 67%

Radiocarbon Impact in a Nearby Tree of a Light-Water WER Type Nuclear Power Plant, Paks, Hungary

Janovics

2013

azu_js_rc

View full text Add to dashboard Cite

ABSTRACT. Tree-ring series were collected for radiocarbon analyses from the vicinity of Paks nuclear power plant (NPP) and a background area (Dunaföldvár) for a 10-yr period (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009). Samples of holocellulose were prepared from the wood and converted to graphite for accelerator mass spectrometry (AMS) 14 C measurement using the MICADAS at ETH Zürich. The 14 C concentration data from these tree rings was compared to the background tree rings for each year. The global decreasing trend of atmospheric 14 C activity concentration was observed in the annual tree rings both in the background area and in the area of the NPP. As an average of the past 10 yr, the excess 14 C emitted by the pressurized-water reactor (PWR) NPP to the atmosphere shows only a slight systematic excess (~6‰) 14 C in the annual rings. The highest 14 C excess was 13‰ (in 2006); however, years with the same 14 C level as the background were quite frequent in the tree-ring series.

show abstract

Radiocarbon concentration in modern tree rings from Valladolid, Spain

Cited by 16 publications

References 24 publications

Cosmic ray event in 994 C.E. recorded in radiocarbon from Danish oak

Cosmic ray event in 994 C.E. recorded in radiocarbon from Danish oak

Radiocarbon method in environmental monitoring of CO2 emission

Radiocarbon Impact in a Nearby Tree of a Light-Water WER Type Nuclear Power Plant, Paks, Hungary

Contact Info

Product

Resources

About