Radiation contributed more than temperature to increased decadal autumn and annual carbon uptake of two eastern North America mature forests

	Radiation contributed more than temperature to increased decadal autumn and annual carbon uptake of two eastern North America mature forests
	Gonsamo, Alemu 1; Croft, Holly 1; Chen, Jing M.1; Wu, Chaoyang 1; Froelich, Norma 1; Staebler, Ralf M.1
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2015
卷号	201 页码:740-749
关键词	Borden forest Carbon uptake phenology Climate change Harvard forest Land surface phenology Photosynthetically active radiation
通讯作者	Gonsamo, A (reprint author), Univ Toronto, Dept Geog, 100 St George St,Room 5047, Toronto, ON M5S 3G3, Canada.
英文摘要	The eastern North America mature deciduous forests are increasing their carbon (C) sink, which is believed to be due to a longer growing season. In this study, we investigated the impacts of land surface phenology (LSP) and carbon uptake phenology (CUP) on the net ecosystem productivity (NEP) of the two longest-running flux tower sites in the region. Our results show that there is no trend in the start (SOS), end (EOS), and length of growing season (LOS) at both sites; nor do they explain the interannual and long-term trend in NEP. We found no evidence for a changing growing season and cannot attribute the increasing C sink to growing season length. However, there is strong trend in end (ECU) and length of net positive carbon uptake (LCU) period. ECU is delaying and LCU is getting longer, and they both explain the interannual and long-term trends in NEP. There is increasing trend of photosynthetically active radiation (PAR) at both sites in line with increasing NEP. PAR is contributing the most both to NEP and ECU. CUP is affected more by the increased photosynthetic activity partially due to increased PAR, but not by timing of spring onset and autumn senescence of leaves. There is also significant (p<0.01) reductions in emissions of sulfur oxides (SOx), nitrogen oxides (NOx), total nitrate (HNO3 + NO3) and ozone since 1992. The reductions in gaseous and particulate emissions imply the occurrence of direct aerosol mediated brightening and therefore increased PAR and enhanced C uptake by eastern North America mature forests. (C) 2014 Elsevier B.V. All rights reserved.
研究领域[WOS]	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000347863900002
内容类型	期刊论文
源URL	[http://ir.ceode.ac.cn/handle/183411/38483]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1.[Gonsamo, Alemu] Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210093, Jiangsu, Peoples R China 2.[Gonsamo, Alemu 3.Croft, Holly 4.Chen, Jing M.] Univ Toronto, Dept Geog, Toronto, ON M5S 3G3, Canada 5.[Gonsamo, Alemu 6.Croft, Holly 7.Chen, Jing M.] Univ Toronto, Program Planning, Toronto, ON M5S 3G3, Canada 8.[Wu, Chaoyang] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China 9.[Froelich, Norma] No Michigan Univ, Earth Environm & Geog Sci Dept, Marquette, MI 49855 USA 10.[Staebler, Ralf M.] Environm Canada, Air Qual Proc Res Sect, Toronto, ON M3H 5T4, Canada
推荐引用方式 GB/T 7714	Gonsamo, Alemu,Croft, Holly,Chen, Jing M.,et al. Radiation contributed more than temperature to increased decadal autumn and annual carbon uptake of two eastern North America mature forests[J]. AGRICULTURAL AND FOREST METEOROLOGY,2015,201:740-749.
APA	Gonsamo, Alemu,Croft, Holly,Chen, Jing M.,Wu, Chaoyang,Froelich, Norma,&Staebler, Ralf M..(2015).Radiation contributed more than temperature to increased decadal autumn and annual carbon uptake of two eastern North America mature forests.AGRICULTURAL AND FOREST METEOROLOGY,201,740-749.
MLA	Gonsamo, Alemu,et al."Radiation contributed more than temperature to increased decadal autumn and annual carbon uptake of two eastern North America mature forests".AGRICULTURAL AND FOREST METEOROLOGY 201(2015):740-749.