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Change in the Green-Up Dates for Quercus mongolica in Northeast China and Its Climate-Driven Mechanism from 1962 to 2012.

Fan D, Zhu W, Zheng Z, Zhang D, Pan Y, Jiang N, Zhou X - PLoS ONE (2015)

Bottom Line: The results indicated that the unified phenology model can be well parameterized with the satellite derived green-up dates.The green-up dates for Q. mongolica across Northeast China showed a delayed latitudinal gradient of 2.699 days degree-1, with the earliest date on the Julian day 93 (i.e., 3th April) in the south and the latest date on the Julian day 129 (i.e., 9th May) in the north.The green-up date for Q. mongolica in Northeast China has advanced 6.6 days (1.3 days decade-1) from 1962 to 2012.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; College of Resources Science & Technology, Beijing Normal University, Beijing 100875, China.

ABSTRACT
The currently available studies on the green-up date were mainly based on ground observations and/or satellite data, and few model simulations integrated with wide coverage satellite data have been reported at large scale over a long time period (i.e., > 30 years). In this study, we combined phenology mechanism model, long-term climate data and synoptic scale remote sensing data to investigate the change in the green-up dates for Quercus mongolica over 33 weather stations in Northeast China and its climate-driven mechanism during 1962-2012. The results indicated that the unified phenology model can be well parameterized with the satellite derived green-up dates. The optimal daily mean temperature for chilling effect was between -27°C and 1°C for Q. mongolica in Northeast China, while the optimal daily mean temperature for forcing effect was above -3°C. The green-up dates for Q. mongolica across Northeast China showed a delayed latitudinal gradient of 2.699 days degree-1, with the earliest date on the Julian day 93 (i.e., 3th April) in the south and the latest date on the Julian day 129 (i.e., 9th May) in the north. The green-up date for Q. mongolica in Northeast China has advanced 6.6 days (1.3 days decade-1) from 1962 to 2012. With the prevailing warming in autumn, winter and spring in Northeast China during the past 51 years, the chilling effect for Q. mongolica has been weakened, while the forcing effect has been enhanced. The advancing trend in the green-up dates for Q. mongolica implied that the enhanced forcing effect to accelerate green-up was stronger than the weakened chilling effect to hold back green-up while the changes of both effects were caused by the warming climate.

No MeSH data available.


Related in: MedlinePlus

The temporal changes in the green-up dates for Q. mongolica in Northeast China from 1962 to 2012.(A) The temporal changes in the green-up dates over 33 weather stations; (B) the frequency distribution of the temporal changes in green-up dates; and (C) the interannual variations in green-up dates (DOY) for the 33 stations and the change trend (days decade-1). Note: the numbers in (A) indicate the advanced (minus number) or delayed (plus number) days at each weather station.
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pone.0130516.g005: The temporal changes in the green-up dates for Q. mongolica in Northeast China from 1962 to 2012.(A) The temporal changes in the green-up dates over 33 weather stations; (B) the frequency distribution of the temporal changes in green-up dates; and (C) the interannual variations in green-up dates (DOY) for the 33 stations and the change trend (days decade-1). Note: the numbers in (A) indicate the advanced (minus number) or delayed (plus number) days at each weather station.

Mentions: The temporal changes in the green-up dates are shown in Fig 5. The Q. mongolica forests across all the 33 stations in Northeast China exhibited an advancing trend in the green-up dates during 1962–2012 (Fig 5A and 5B)). The average advancing trend for the 33 stations was 1.3 days decade-1 (i.e., advanced 6.6 days from 1962 to 2012) (Fig 5C).


Change in the Green-Up Dates for Quercus mongolica in Northeast China and Its Climate-Driven Mechanism from 1962 to 2012.

Fan D, Zhu W, Zheng Z, Zhang D, Pan Y, Jiang N, Zhou X - PLoS ONE (2015)

The temporal changes in the green-up dates for Q. mongolica in Northeast China from 1962 to 2012.(A) The temporal changes in the green-up dates over 33 weather stations; (B) the frequency distribution of the temporal changes in green-up dates; and (C) the interannual variations in green-up dates (DOY) for the 33 stations and the change trend (days decade-1). Note: the numbers in (A) indicate the advanced (minus number) or delayed (plus number) days at each weather station.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4476677&req=5

pone.0130516.g005: The temporal changes in the green-up dates for Q. mongolica in Northeast China from 1962 to 2012.(A) The temporal changes in the green-up dates over 33 weather stations; (B) the frequency distribution of the temporal changes in green-up dates; and (C) the interannual variations in green-up dates (DOY) for the 33 stations and the change trend (days decade-1). Note: the numbers in (A) indicate the advanced (minus number) or delayed (plus number) days at each weather station.
Mentions: The temporal changes in the green-up dates are shown in Fig 5. The Q. mongolica forests across all the 33 stations in Northeast China exhibited an advancing trend in the green-up dates during 1962–2012 (Fig 5A and 5B)). The average advancing trend for the 33 stations was 1.3 days decade-1 (i.e., advanced 6.6 days from 1962 to 2012) (Fig 5C).

Bottom Line: The results indicated that the unified phenology model can be well parameterized with the satellite derived green-up dates.The green-up dates for Q. mongolica across Northeast China showed a delayed latitudinal gradient of 2.699 days degree-1, with the earliest date on the Julian day 93 (i.e., 3th April) in the south and the latest date on the Julian day 129 (i.e., 9th May) in the north.The green-up date for Q. mongolica in Northeast China has advanced 6.6 days (1.3 days decade-1) from 1962 to 2012.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; College of Resources Science & Technology, Beijing Normal University, Beijing 100875, China.

ABSTRACT
The currently available studies on the green-up date were mainly based on ground observations and/or satellite data, and few model simulations integrated with wide coverage satellite data have been reported at large scale over a long time period (i.e., > 30 years). In this study, we combined phenology mechanism model, long-term climate data and synoptic scale remote sensing data to investigate the change in the green-up dates for Quercus mongolica over 33 weather stations in Northeast China and its climate-driven mechanism during 1962-2012. The results indicated that the unified phenology model can be well parameterized with the satellite derived green-up dates. The optimal daily mean temperature for chilling effect was between -27°C and 1°C for Q. mongolica in Northeast China, while the optimal daily mean temperature for forcing effect was above -3°C. The green-up dates for Q. mongolica across Northeast China showed a delayed latitudinal gradient of 2.699 days degree-1, with the earliest date on the Julian day 93 (i.e., 3th April) in the south and the latest date on the Julian day 129 (i.e., 9th May) in the north. The green-up date for Q. mongolica in Northeast China has advanced 6.6 days (1.3 days decade-1) from 1962 to 2012. With the prevailing warming in autumn, winter and spring in Northeast China during the past 51 years, the chilling effect for Q. mongolica has been weakened, while the forcing effect has been enhanced. The advancing trend in the green-up dates for Q. mongolica implied that the enhanced forcing effect to accelerate green-up was stronger than the weakened chilling effect to hold back green-up while the changes of both effects were caused by the warming climate.

No MeSH data available.


Related in: MedlinePlus