The impact of growing-season length variability on carbon assimilation and evapotranspiration over 88 years in the eastern US deciduous forest

1999 ◽  
Vol 42 (3) ◽  
pp. 139-145 ◽  
Author(s):  
M. A. White ◽  
S. W. Running ◽  
P. E. Thornton
Keyword(s):  
Deciduous Forest ◽  
Carbon Assimilation ◽  
Growing Season ◽  
Season Length ◽  
Growing Season Length ◽  
The Impact

scholarly journals Underestimated effects of low temperature during early growing season on carbon sequestration of a subtropical coniferous plantation

2011 ◽  
Vol 8 (6) ◽  
pp. 1667-1678 ◽  
Author(s):  
W.-J. Zhang ◽  
H.-M. Wang ◽  
F.-T. Yang ◽  
Y.-H. Yi ◽  
X.-F. Wen ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Air Temperature ◽  
Growing Season ◽  
Carbon Uptake ◽  
Summer Drought ◽  
Eddy Flux ◽  
Season Length ◽  
Growing Season Length ◽  
Coniferous Plantation ◽  
The Impact

Abstract. The impact of air temperature in early growing season on the carbon sequestration of a subtropical coniferous plantation was discussed through analyzing the eddy flux observations at Qianyanzhou (QYZ) site in southern China from 2003 to 2008. This site experienced two cold early growing seasons (with temperature anomalies of 2–5 °C) in 2005 and 2008, and a severe summer drought in 2003. Results indicated that the low air temperature from January to March was the major factor controlling the inter-annual variations in net carbon uptake at this site, rather than the previously thought summer drought. The accumulative air temperature from January to February showed high correlation (R2=0.970, p<0.001) with the annual net ecosystem production (NEP). This was due to the controls of early-month temperature on the plant phenology developing and the growing season length at this subtropical site. The cold spring greatly shortened the growing season length and therefore reduced the carbon uptake period. The eddy flux observations showed a carbon loss of 4.04 g C m−2 per growing-season day at this coniferous forest site. On the other hand, the summer drought also reduced the net carbon uptake strength because the photosynthesis was more sensitive to water deficit stress than the ecosystem respiration. However, the impact of summer drought occurred within a relatively shorter period and the carbon sequestration went back to the normal level once the drought was relieved.

scholarly journals Assessment of agrometeorological indices over Southeast Europe in the context of climate change (1961-2018)

Időjárás ◽  
2021 ◽  
Vol 125 (2) ◽  
pp. 255-269
Author(s):  
Hristo Chervenkov ◽  
Kiril Slavov
Keyword(s):  
Climate Change ◽  
System Analysis ◽  
Environmental Changes ◽  
Growing Season ◽  
Season Length ◽  
Economic Returns ◽  
Southeast Europe ◽  
Growing Season Length ◽  
Very High Spatial Resolution ◽  
The Impact

The regional response over Southeast (SE) Europe to the climate warming in global and continental scales has been confirmed to have essential impact on the agriculture and forestry since the middle of twentieth century. Normal variations in weather throughout a growing season cause variations in harvest and, generally, the impact could be large in terms of production amounts and economic returns. Agriculture is sensitive to the changes in weather and climate, and the occurrence of extreme events threaten the agricultural systems. Forests are particularly sensitive to climate change, because the long life-span of trees does not allow for rapid adaptation to environmental changes. This study provides an overview of the spatial patterns and the long-term temporal evolution of the following agrometeorological indices: growing season length, accumulated active temperatures and biologically effective degree days. Hence the focus is on the Growing season length, its start and end dates are analyzed separately. All indices are computed from the daily mean temperatures which, in turn, are derived from the output of the MESCAN-SURFEX system analysis of the collaborative initiative UERRA. The geographical domain of interest is Southeast Europe, and the assessment is performed at a very high spatial resolution on annual basis for the period 1961–2018. We find strong evidences of essential increase in the considered indices which dominates spatially over the low-elevated areas of the domain and is statistically significant at 5% level. Key message is also the revealed asymmetry of the increase in the most relevant index, the growing season length: its total lengthening is linked more to the shifting to earlier date of the start, rather than to its later cessation.

scholarly journals Underestimated effects of low temperature during early growing season on carbon sequestration of a subtropical coniferous plantation

2011 ◽  
Vol 8 (1) ◽  
pp. 1411-1444
Author(s):  
W.-J. Zhang ◽  
H.-M. Wang ◽  
F.-T. Yang ◽  
Y.-H. Yi ◽  
X.-F. Wen ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Air Temperature ◽  
Growing Season ◽  
Carbon Uptake ◽  
Summer Drought ◽  
Eddy Flux ◽  
Season Length ◽  
Growing Season Length ◽  
Coniferous Plantation ◽  
The Impact

Abstract. The impact of air temperature in early months on the carbon sequestration of a subtropical coniferous plantation was discussed by analyzing the eddy flux observations at Qianyanzhou (QYZ) site located in southern China from 2003 to 2008. This site experienced two cold early growing seasons (with temperature anomalies of 2–5° C) in 2005 and 2008, and also a severe summer drought in 2003. Results indicated that the low air temperature from January to March was the major factor controlling the inter-annual variations in net carbon uptake at this site, rather than the previously thought summer drought. The accumulative air temperature from January to February showed high correlation (R2 = 0.970, p < 0.001) with the annual net ecosystem production (NEP). This was due to the controls of early-months temperature on the plant phenology developing and the growing season length at this subtropical site. The cold spring greatly shortened the growing season length and therefore reduced the carbon uptake period. The eddy flux observations showed a carbon loss of 4.04 g C m−2 per growing-season day at this coniferous forest site. On the other hand, the summer drought also reduced the net carbon uptake strength because the photosynthesis was more sensitive to water deficit stress than the ecosystem respiration. However, the impact of summer drought occurred within a relatively shorter period and the carbon sequestration went back to the normal level once the drought was relieved.

scholarly journals Growing‐season length and soil microbes influence the performance of a generalist bunchgrass beyond its current range

Ecology ◽  
2020 ◽  
Vol 101 (9) ◽  
Author(s):  
Clifton P. Bueno de Mesquita ◽  
Samuel A. Sartwell ◽  
Steven K. Schmidt ◽  
Katharine N. Suding
Keyword(s):  
Soil Microbes ◽  
Growing Season ◽  
Season Length ◽  
Current Range ◽  
Growing Season Length

scholarly journals Growing Season Length as a Key Factor of Cumulative Net Ecosystem Exchange Over the Pine Forest Ecosystems in Europe

2015 ◽  
Vol 29 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Alina Danielewska ◽  
Marek Urbaniak ◽  
Janusz Olejnik
Keyword(s):  
Air Temperature ◽  
Measurement Data ◽  
Growing Season ◽  
Pine Forest ◽  
Pine Forests ◽  
Net Ecosystem Productivity ◽  
Ecosystem Productivity ◽  
Season Length ◽  
Important Species ◽  
Growing Season Length

Abstract The Scots pine is one of the most important species in European and Asian forests. Due to a widespread occurrence of pine forests, their significance in the energy and mass exchange between the Earth surface and the atmosphere is also important, particularly in the context of climate change and greenhouse gases balance. The aim of this work is to present the relationship between the average annual net ecosystem productivity and growing season length, latitude and air temperature (tay) over Europe. Therefore, CO2 flux measurement data from eight European pine dominated forests were used. The observations suggest that there is a correlation between the intensity of CO2 uptake or emission by a forest stand and the above mentioned parameters. Based on the obtained results, all of the selected pine forest stands were CO2 sinks, except a site in northern Finland. The carbon dioxide uptake increased proportionally with the increase of growing season length (9.212 g C m-2 y-1 per day of growing season, R2 = 0.53, p = 0.0399). This dependency showed stronger correlation and higher statistical significance than both relationships between annual net ecosystem productivity and air temperature (R2 = 0.39, p = 0.096) and annual net ecosystem productivity and latitude (R2 = 0.47, p = 0.058). The CO2 emission surpassed assimilation in winter, early spring and late autumn. Moreover, the appearance of late, cold spring and early winter, reduced annual net ecosystem productivity. Therefore, the growing season length can be considered as one of the main factor affecting the annual carbon budget of pine forests.

Strong contribution of autumn phenology to changes in satellite-derived growing season length estimates across Europe (1982-2011)

2014 ◽  
Vol 20 (11) ◽  
pp. 3457-3470 ◽  
Author(s):  
Irene Garonna ◽  
Rogier de Jong ◽  
Allard J.W. de Wit ◽  
Caspar A. Mücher ◽  
Bernhard Schmid ◽  
...  
Keyword(s):  
Growing Season ◽  
Season Length ◽  
Growing Season Length
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