Multiyear precipitation reduction strongly decrease carbon uptake over North China

Yuan, Wenping; Liu, Dunyu; Dong, Wenjie; Liu, S. G.; Zhou, Guangsheng; Yu, Guirui; Zhao, Tianbao; Feng, Jinming; G., Z.; Chen, J. Q.; Chen, Y.; Chen, S. P.; Han, Shijie; Huang, Jianping; Li, L. H.; Liu, Haozhe; Liu, S. M.; G., M.; Wang, Y. F.; Xia, Jiangzhou; Xü, Wei; Zhang, Q.; Zhao, Xueyong; Zhao, Liang

doi:10.5194/bgd-10-1605-2013

Cited by 6 publications

(4 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where GPP is the gross primary productivity (g C/m 2 ), FPAR refers to the ratio of plant canopy absorbing photosynthetically active radiation, and the product of FPAR and PAR is the fraction of PAR absorbed by plant canopy. Moreover, an Angstrom-type correlation method was used to calculate downward solar radiation (Rg) from the daylight hours data (Almorox and Hontoria, 2004;Yuan et al, 2013), and Rg was converted to photosynthetically active radiation (PAR) using a ratio of 0.5; ε max is the utilization rate of potential light energy (2.14 g C/MJ), f(T) is the temperature limiting factor, and f(W) is the water limiting factor. FPAR is calculated as: FPAR=a×NDVI+b.…”

Section: Analysis Of Primary Productivitymentioning

confidence: 99%

Effects of climate change on phenology and primary productivity in the desert steppe of Inner Mongolia

et al. 2014

View full text Add to dashboard Cite

Variations in temperature and precipitation affect local ecosystems. Considerable spatial and temporal heterogeneity exists in arid ecosystems such as desert steppes. In this study, we analyzed the spatiotemporal dynamics of climate and vegetation phenology in the desert steppe of Inner Mongolia, China using meteorological data (1961-2010) from 11 stations and phenology data (2004-2012) from 6 ecological observation stations. We also estimated the gross primary production for the period of 1982-2009 and found that the annual mean temperature increased at a rate of 0.47ºC/decade during 1961-2010, with the last 10 years being consistently warmer than the 50 years as an average. The most significant warming occurred in winters. Annual precipitation slightly decreased during the 50-year period, with summer precipitation experiencing the highest drop in the last 10 years, and spring precipitation, a rise. Spatially, annual precipitation increased significantly in the northeastern and eastern central areas next to the typical steppe. From 2004 to 2012, vegetation green-up and senescence date advanced in the study area, shortening the growing season. Consequently, the primary productivity of the desert steppe decreased along the precipitation gradient from southeast to northwest. Temporally, productivity increased during the period of 1982-1999 and significantly decreased after 2000. Overall, the last decade witnessed the most dramatic climatic changes that were likely to negatively affect the desert steppe ecosystem. The decreased primary productivity, in particular, decreases ecosystem resilience and impairs the livelihood of local farmers and herdsmen.

show abstract

Section: Analysis Of Primary Productivitymentioning

confidence: 99%

Effects of climate change on phenology and primary productivity in the desert steppe of Inner Mongolia

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Utilizing the Moderate Resolution Imaging Spectroradiometer (MODIS) GPP and NPP products, Zhang et al (2012a) reported that the 2010 spring drought caused detectable reductions of GPP and NPP in southwestern China. Using the light use efficiency models CASA, MODIS-GPP, and Eddy Covariance Light Use Efficiency (EC-LUE), along with the dynamic Integrated Biosphere Simulator (IBIS) vegetation model, Yuan et al (2013) found that the carbon sink over North China declined by 0.011 Pg C yr −1 during the 1999-2011 drought period. However, these studies mainly focused on the influence of droughts on GPP and NPP.…”

Section: Introductionmentioning

confidence: 99%

Impacts of droughts on carbon sequestration by China's terrestrial ecosystems from 2000 to 2011

Liu

Zhou

et al. 2014

Biogeosciences

View full text Add to dashboard Cite

Abstract. In recent years, China's terrestrial ecosystems have experienced frequent droughts. How these droughts have affected carbon sequestration by the terrestrial ecosystems is still unclear. In this study, the process-based Boreal Ecosystem Productivity Simulator (BEPS) model, driven by remotely sensed vegetation parameters, was employed to assess the effects of droughts on net ecosystem productivity (NEP) of terrestrial ecosystems in China from 2000 to 2011. Droughts of differing severity, as indicated by a standard precipitation index (SPI), hit terrestrial ecosystems in China extensively in 2001, 2006, 2009, and 2011. The national total annual NEP exhibited the slight decline of −11.3 Tg C yr−2 during the aforementioned years of extensive droughts. The NEP reduction ranged from 61.1 Tg C yr−1 to 168.8 Tg C yr−1. National and regional total NEP anomalies were correlated with the annual mean SPI, especially in Northwest China, North China, Central China, and Southwest China. The reductions in annual NEP in 2001 and 2011 might have been caused by a larger decrease in annual gross primary productivity (GPP) than in annual ecosystem respiration (ER). The reductions experienced in 2009 might be due to a decrease in annual GPP and an increase in annual ER, while reductions in 2006 could stem from a larger increase in ER than in GPP. The effects of droughts on NEP lagged up to 3–6 months, due to different responses of GPP and ER. In eastern China, where is humid and warm, droughts have predominant and short-term lagged influences on NEP. In western regions, cold and arid, the drought effects on NEP were relatively weaker but prone to lasting longer.

show abstract

Section: Y Liu Et Al: Impacts Of Droughts On Carbon Sequestrationmentioning

confidence: 99%

Impacts of droughts on carbon sequestration by China's terrestrial ecosystems from 2000 to 2011

Liu¹,

Zhou²,

Ju³

et al. 2013

Preprint

View full text Add to dashboard Cite

Abstract. In recent years, droughts have frequently hit China's terrestrial ecosystems. How these droughts affected carbon sequestration by China's terrestrial ecosystems is still unclear. In this study, the process-based Boreal Ecosystem Productivity Simulator (BEPS) model, driven by remotely sensed vegetation parameters, was employed to assess the effects of droughts on net ecosystem productivity (NEP) of terrestrial ecosystems in China for the period from 2000 to 2011. Different categories of droughts, as indicated by a standard precipitation index (SPI), extensively hit terrestrial ecosystems in China, particularly in 2001, 2006, 2009 and 2011. The national total NEP exhibited a slight decline of −11.3 Tg C yr−2 during the study period, mainly due to large reductions of NEP in typical drought-hit years 2001, 2006, 2009 and 2011, ranging from 61.1 Tg C yr−1 to 168.8 Tg C yr−1. National and regional total NEP anomalies were correlated with corresponding annual mean SPI, especially in Northwest China, North China, Central China, and Southwest China. In drought years, the reductions of NEP might be caused by a larger decrease in gross primary productivity (GPP) than in respiration (RE) (2001 and 2011), a decrease in GPP and an increase in RE (2009), or a larger increase in RE than in GPP (2006). Droughts had lagged effects of up to 3–6 months on NEP due to different reactions of GPP and RE to droughts. In east humid and warm parts of China, droughts have predominant and short-term lagged influences on NEP. In western cold and arid regions, the effects of droughts on NEP were relatively weaker and might last for a longer period of time.

show abstract

Multiyear precipitation reduction strongly decrease carbon uptake over North China

Cited by 6 publications

References 32 publications

Effects of climate change on phenology and primary productivity in the desert steppe of Inner Mongolia

Effects of climate change on phenology and primary productivity in the desert steppe of Inner Mongolia

Impacts of droughts on carbon sequestration by China's terrestrial ecosystems from 2000 to 2011

Impacts of droughts on carbon sequestration by China's terrestrial ecosystems from 2000 to 2011

Contact Info

Product

Resources

About