On the Average Value of Correlated Time Series, with Applications in Dendroclimatology and Hydrometeorology

Wigley, T. M. L.; Briffa, KR; Jones, Phil

doi:10.1175/1520-0450(1984)023<0201:otavoc>2.0.co;2

Cited by 2,996 publications

(2,082 citation statements)

References 0 publications

Supporting

Mentioning

1,993

Contrasting

Unclassified

Order By: Relevance

“…The internal quality of each chronology was examined according to the following statistical indexes: MS (Mean Sensitivity), a measurement of the relative year-to-year change in tree-ring width; EPS (Expressed Population Signal), an estimation of how well a finite-sample chronology can represent the theoretical population chronology based on an infinite number of trees; and RBAR, a measure of the common variance between the single series in a chronology (Fritts, 1976;Wigley et al, 1984). The two latter indexes were calculated for a 15-year window with a 14-year overlap.…”

Section: Sites Descriptionmentioning

confidence: 95%

“…The two latter indexes were calculated for a 15-year window with a 14-year overlap. EPS, following a previous study performed for P. flexuosa woodlands distributed in the Central Monte Desert (Piraino et al, 2015), was considered satisfactory when surpassing a threshold of 0.75 instead of the original 0.85 value proposed by Wigley et al (1984).…”

Section: Sites Descriptionmentioning

confidence: 99%

See 1 more Smart Citation

Assessing the Sensitivity of Riparian Algarrobo Dulce (<i>Prosopis flexuosa</i> DC) Radial Growth to Hydrological Changes

Piraino

Roig

2016

Geochronometria

View full text Add to dashboard Cite

Ecotones, as for example riparian zones, have long interested ecologists, due to their potential role in generating species biodiversity and evolutionary novelty, as well as their sensitivity to environmental changes. Along riparian areas, vegetation is recognized for its ecological importance in several ecosystemic processes. In the Central Monte Desert (central-west Argentina), Prosopis flexuosa grows in territories characterized by a permanent access to water reservoirs, e.g. along riverbanks, where the species forms the classic gallery forests. Despite the ecosystemic role of the different Prosopis species distributed in arid lands, thus far no analysis has been conducted regarding the relation between their radial growth and hydrological changes, namely streamflow variability, in riparian settings. To fill this gap of knowledge, we performed a dendrochronological analysis considering several riparian P. flexuosa trees differing in their spatial position in relation to the riverbank. Pointer years, correlation function, and regression analyses show differences in the dendrohydrological signal of the studied species, probably function of tree distance from the river. In this sense, radial growth of trees distributed near the riverbank is tightly coupled to spring-summer (September to March) streamflow variability, whereas for farthest trees the ring development is driven by a combination of winter and spring river discharge and late-summer precipitation amount. The presented results demonstrate the potentiality of P. flexuosa, and in a broader sense of the Prosopis genus, in dendrohydrological studies.

show abstract

Section: Sites Descriptionmentioning

confidence: 95%

Section: Sites Descriptionmentioning

confidence: 99%

Assessing the Sensitivity of Riparian Algarrobo Dulce (<i>Prosopis flexuosa</i> DC) Radial Growth to Hydrological Changes

Piraino

Roig

2016

Geochronometria

View full text Add to dashboard Cite

show abstract

“…Three tree-ring chronologies (standard, residual and arstan) were obtained through ARSTAN and each is a biweight robust mean of the mean tree-ring series which were individually detrended (Cook, 1985). The running EPS (expressed population signal) and running interseries correlation (running rbar) were calculated using a 40-year window with an overlap of 39 years in order to express the quality, reliability and strength of the common signal in the treering chronology (Wigley et al, 1984). The commonly accepted EPS threshold above which a tree-ring chronology is considered reliable is 0.85 (Wigley et al, 1984).…”

Section: Detrending and Tree-ring Chronology Buildingmentioning

confidence: 99%

Imprisoned in the Cretan mountains: How relict Zelkova abelicea (Ulmaceae) trees cope with Mediterranean climate

Fazan

Guillet

Corona

et al. 2017

Science of The Total Environment

View full text Add to dashboard Cite

• We established the first ever centennial chronology for a broadleaved tree on Crete.• Zelkova abelicea is most sensitive to precipitation and drought in May-June.• No growth change can be related to the increase in dry conditions of the past decades.• Z. abelicea has a high capacity to withstand changing environmental conditions.We investigate the sensitivity of the relict, endemic Cretan tree species Zelkova abelicea (Lam.) Boiss. (Ulmaceae) to several climate variables (temperature, precipitation and drought). For this purpose, we establish the first centennial tree-ring chronology for the species, and the first ever tree-ring chronology for a broadleaved species on Crete. We demonstrate the strong sensitivity of Z. abelicea towards precipitation and drought in late spring to early summer and the absence of a significant response to abundant precipitation occurring during winter or early spring. Whereas the late spring sensitivity is strong and consistent through time, the species seems to be experiencing a loss of signal towards early summer conditions since the 1970s, interpreted as an earlier cessation of cambial activity due to the increase in summer drought conditions on Crete. However, despite a reduced vegetative period, no significant decrease in radial growth of Z. abelicea was observed in the tree-ring series for the last decades, thus highlighting the capacity of Z. abelicea to withstand changing environmental conditions.

show abstract

“…The mean sensitivity (MS), a measure of the relative difference in widths between adjacent rings, was 0.19 and 0.23, respectively, for the NGNEstd and HLBEstd chronologies. The expressed population signal (EPS), which represents an acceptable level of confidence in a chronology, was 0.96 and 0.91, respectively, for the NGNEstd and HLBEstd chronologies, which are greater than the threshold value of 0.85 [21]. These statistical values indicated that the two chronologies provided a robust signal strength suitable for investigating climate variations.…”

Section: Tree-ring Datamentioning

confidence: 99%

“…These statistical values indicated that the two chronologies provided a robust signal strength suitable for investigating climate variations. The subsample signal strength (SSS) was determined to assess the adequacy of replication in the early years of the tree-ring chronologies [21]. To use the maximum length of the chronologies and ensure the reliability of the reconstructions, we restricted our analysis to a period with an SSS value of at least 0.…”

Section: Tree-ring Datamentioning

confidence: 99%

A tree-ring-based reconstruction of the Yimin River annual runoff in the Hulun Buir region, Inner Mongolia, for the past 135 years

Bao

Liu

2012

Chin. Sci. Bull.

View full text Add to dashboard Cite

Based on the relationships between the regional tree-ring chronology (RC) of moisture-sensitive Pinus sylvestris var. mongolica and the monthly mean maximum temperature, annual precipitation and annual runoff, a reconstruction of the runoff of the Yimin River was performed for the period 1868-2002. The model was stable and could explain 52.2% of the variance for the calibration period of . During the past 135 years, 21 extremely dry years and 19 extremely wet years occurred. These years represented 15.6% and 14.1% of the total study period, respectively. Six severe drought events lasting two years or more occurred in

show abstract

On the Average Value of Correlated Time Series, with Applications in Dendroclimatology and Hydrometeorology

Cited by 2,996 publications

References 0 publications

Assessing the Sensitivity of Riparian Algarrobo Dulce (<i>Prosopis flexuosa</i> DC) Radial Growth to Hydrological Changes

Assessing the Sensitivity of Riparian Algarrobo Dulce (<i>Prosopis flexuosa</i> DC) Radial Growth to Hydrological Changes

Imprisoned in the Cretan mountains: How relict Zelkova abelicea (Ulmaceae) trees cope with Mediterranean climate

A tree-ring-based reconstruction of the Yimin River annual runoff in the Hulun Buir region, Inner Mongolia, for the past 135 years

Contact Info

Product

Resources

About