Analysis of growing degree-days as a climate impact indicator in a region with extreme annual air temperature amplitude

Grigorieva, Elena A.; Matzarakis, Andreas; Freitas, C. R. de

doi:10.3354/cr00888

Cited by 65 publications

(52 citation statements)

References 39 publications

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“…Among the many applicable thresholds for T base depending on the species, plant variety, and the purpose of the analysis itself (Yang et al 1995; Nyéki and Soltész 1996; Snyder et al 1999; Zavalloni et al 2006; Matzneller et al 2014), thresholds of 0, 5, and 10 °C, which are most frequently used for assessing the impact of thermal conditions on plant growth, were adopted as threshold temperatures, respectively, determining the non-winter period, growing season, and the period of full plant growth (Gordon and Bootsma 1993; Grigorieva et al 2010). …”

Section: Methodsmentioning

confidence: 99%

Variability of growing degree days in Poland in response to ongoing climate changes in Europe

et al. 2016

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An observed increase in air temperature can lead to significant changes in the phenology of plants and, consequently, changes in agricultural production. The aim of the study was to evaluate the spatial differentiation of thermal resources in Poland and their variability during a period of changing thermal conditions in Europe. Since the variability of thermal conditions is of paramount importance for perennial crops, the study focused on apple, plum, and cherry orchard regions in Poland. The analysis was conducted for the period of 1951–2010 using air temperature daily data. Thermal resources have been defined using the growing degree days (GDD) index calculated independently for the whole year and during in frost-free season for three air temperature thresholds: 0, 5, and 10 °C, which determine the non-winter period, growing season, and the period of full plant growth, respectively. In addition, due to the high significance for perennials in particular, the incidence and intensity of frost during flowering were calculated. In this study, a detailed analysis of the spatial differentiation of thermal resources was first performed, followed by an evaluation of long-term variability and associated change patterns. The obtained results confirmed an increase in thermal resources in Poland as a consequence of the lengthening of the growing season. However, the frequency and intensity of spring frost, especially during flowering or even during ripening of plants, remain a threat to harvests in both the eastern and western parts of the country.

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Section: Methodsmentioning

confidence: 99%

Variability of growing degree days in Poland in response to ongoing climate changes in Europe

et al. 2016

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“…These bio-temperature indicators are associated closely with plant growth and distribution; therefore, they are often adopted as thresholds in models designed to predict the future effects of climate change on ecosystems Sitch et al, 2003). Numerous models have been developed on the basis of bio-temperature indicators to predict plant phenology and crop production; such models have typically been demonstrated to be robust (Grigorieva et al, 2010;Fu et al, 2012;Richardson et al, 2012). Thus, changes in key bio-temperature metrics can be considered to indicate changes in the structure, function, and distribution of vegetation.…”

Section: Zhao and S Wumentioning

confidence: 99%

Spatial and temporal variability of key bio-temperature indicators on the Qinghai-Tibetan Plateau for the period 1961-2013

Zhao

2015

Int. J. Climatol.

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ABSTRACT:The ecosystems of the Qinghai-Tibetan Plateau (QTP) are highly sensitive to climate change, the effects of which can be expressed through alterations to some key thresholds, including bio-temperature. However, to date, few studies have investigated variations in bio-temperature on the QTP in the context of climate change. To address this, the present study selected the following key indicators of bio-temperature: mean temperature of the warmest month (TWM); mean temperature of the coldest month (TCM); accumulated temperature above 10 ∘ C (AT 10 ), 5 ∘ C (AT 5 ), and 0 ∘ C (AT 0 ); and number of days with daily mean temperature above 10 ∘ C (DT 10 ), 5 ∘ C (DT 5 ), and 0 ∘ C (DT 0 ). These indicators were selected owing to their roles in the growth and distribution of vegetation on the QTP. The trends exhibited by these indicators were examined on basis of the data obtained from 71 observation stations on the QTP from 1961 to 2013. The results demonstrate that both TWM and TCM at the regional scale exhibited significant rising trends over this period, although TCM increased at a considerably faster rate. Spatially, the greatest increases in TWM and TCM were observed in the Qaidam basin desert and Guoluo-Naqu alpine shrub meadow regions. Additionally, AT 10 , AT 5 , and AT 0 exhibited increasing trends, with AT 0 increasing most rapidly and exhibiting the most significant changes, followed by AT 5 and then AT 10 . Similarly, DT 0 exhibited a greater overall increase than DT 10 and DT 5 . Spatially, AT and DT exhibited asymmetrical change, i.e. large increases in AT did not correspond to large increases in DT. In general, all the bio-temperature indicators considered indicate pronounced rising trends over this recent five decades. This was likely due to rising air temperatures across the QTP, which have affected the structures and functions of alpine ecosystems.

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“…. m are days with a mean temperature >5 C, which is widely used as the lower limit for plant growth (Grigorieva et al, 2010), and T max and T min are the daily maximum and minimum air temperatures ( C), respectively. As EL16 and EL21 are located at higher elevations than the meteorological station, for these two sites temperature was adjusted considering a lapse rate of 0Á6 C/100 m of elevation (Auer et al, 2005;Körner, 2007).…”

Section: Statistical Analyses and Assessment Of Climate-anatomy Relatmentioning

confidence: 99%

How does climate influence xylem morphogenesis over the growing season? Insights from long-term intra-ring anatomy inPicea abies

Castagneri

Fonti

Arx

et al. 2017

Ann Bot

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Background and Aims During the growing season, the cambium of conifer trees produces successive rows of xylem cells, the tracheids, that sequentially pass through the phases of enlargement and secondary wall thickening before dying and becoming functional. Climate variability can strongly influence the kinetics of morphogenetic processes, eventually affecting tracheid shape and size. This study investigates xylem anatomical structure in the stem of Picea abies to retrospectively infer how, in the long term, climate affects the processes of cell enlargement and wall thickening.Methods Tracheid anatomical traits related to the phases of enlargement (diameter) and wall thickening (wall thickness) were innovatively inspected at the intra-ring level on 87-year-long tree-ring series in Picea abies trees along a 900 m elevation gradient in the Italian Alps. Anatomical traits in ten successive tree-ring sectors were related to daily temperature and precipitation data using running correlations.Key Results Close to the altitudinal tree limit, low early-summer temperature negatively affected cell enlargement. At lower elevation, water availability in early summer was positively related to cell diameter. The timing of these relationships shifted forward by about 20 (high elevation) to 40 (low elevation) d from the first to the last tracheids in the ring. Cell wall thickening was affected by climate in a different period in the season. In particular, wall thickness of late-formed tracheids was strongly positively related to August-September temperature at high elevation.Conclusions Morphogenesis of tracheids sequentially formed in the growing season is influenced by climate conditions in successive periods. The distinct climate impacts on cell enlargement and wall thickening indicate that different morphogenetic mechanisms are responsible for different tracheid traits. Our approach of long-term and highresolution analysis of xylem anatomy can support and extend short-term xylogenesis observations, and increase our understanding of climate control of tree growth and functioning under different environmental conditions.

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Analysis of growing degree-days as a climate impact indicator in a region with extreme annual air temperature amplitude

Cited by 65 publications

References 39 publications

Variability of growing degree days in Poland in response to ongoing climate changes in Europe

Variability of growing degree days in Poland in response to ongoing climate changes in Europe

Spatial and temporal variability of key bio-temperature indicators on the Qinghai-Tibetan Plateau for the period 1961-2013

How does climate influence xylem morphogenesis over the growing season? Insights from long-term intra-ring anatomy inPicea abies

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