Construction and progress of Chinese terrestrial ecosystem carbon, nitrogen and water fluxes coordinated observation

Yu, Guirui; Wang, Ren; Chen, Zhi; Zhang, Leiming; Wang, Qiufeng; Wen, Xuefa; He, Nianpeng; Li, Zhang; Fang, Huajun; Zhu, Xianjin; Gao, Yang; Sun, Xiaomin

doi:10.1007/s11442-016-1300-5

Cited by 46 publications

(21 citation statements)

References 127 publications

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“…These different Changes in leaf carbon content (LCC, %) in the forests and shrublands of China with climate at the scale of the eight eco-regions ranges might be attributed to the climatic conditions that limit the distribution of plants and plant physiological characteristics. To adapt to the changing environment, plants adjust their composition, such as the C content, in different organs (Yang, 2001;Yu et al, 2016;Zheng et al, 2007). For example, regions with higher latitude have longer winters that are colder with less rainfall; consequently, the dominant vegetation is boreal forest, the physiological characteristics of which leads to high LCC content.…”

Section: Regional Differences In Lccmentioning

confidence: 99%

Spatial patterns and environmental factors influencing leaf carbon content in the forests and shrublands of China

Zhao

Wang

et al. 2018

J. Geogr. Sci.

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Leaf carbon content (LCC) is widely used as an important parameter in estimating ecosystem carbon (C) storage, as well as for investigating the adaptation strategies of vegetation to their environment at a large scale. In this study, we used a dataset collected from forests (5119 plots) and shrublands (2564 plots) in China, 2011-2015. The plots were sampled following a consistent protocol, and we used the data to explore the spatial patterns of LCC at three scales: plot scale, eco-region scale (n = 24), and eco-region scale (n = 8). The average LCC of forests and shrublands combined was 45.3%, with the LCC of forests (45.5%) being slightly higher than that of shrublands (44.9%). Forest LCC ranged from 40.2% to 51.2% throughout the 24 eco-regions, while that of shrublands ranged from 35% to 50.1%. Forest LCC decreased with increasing latitude and longitude, whereas shrubland LCC decreased with increasing latitude, but increased with increasing longitude. The LCC increased, to some extent, with increasing temperature and precipitation. These results demonstrate the spatial patterns of LCC in the forests and shrublands at different scales based on field-measured data, providing a reference (or standard) for estimating carbon storage in vegetation at a regional scale.

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Section: Regional Differences In Lccmentioning

confidence: 99%

Spatial patterns and environmental factors influencing leaf carbon content in the forests and shrublands of China

Zhao

Wang

et al. 2018

J. Geogr. Sci.

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“…Under the Carbon Budget Special Project [ 16 ], we obtained in situ volumetric observational data, including 74 site years of eddy-covariance data from 11 flux towers of the Chinese Terrestrial Ecosystem Flux Observation and Research Network (ChinaFLUX) [ 17 ] and carbon stock data of 11 984 plots with geographic coordinates (Fig. 1a ) from the field survey data across China [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Altered trends in carbon uptake in China's terrestrial ecosystems under the enhanced summer monsoon and warming hiatus

Wang

Zhang

et al. 2019

National Science Review

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126

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The carbon budgets in terrestrial ecosystems in China are strongly coupled with climate changes. Over the past decade, China has experienced dramatic climate changes characterized by enhanced summer monsoon and decelerated warming. However, the changes in the trends of terrestrial net ecosystem production (NEP) in China under climate changes are not well documented. Here, we used three ecosystem models to simulate the spatiotemporal variations in China's NEP during 1982–2010 and quantify the contribution of the strengthened summer monsoon and warming hiatus to the NEP variations in four distinct climatic regions of the country. Our results revealed a decadal-scale shift in NEP from a downtrend of –5.95 Tg C/yr2 (reduced sink) during 1982–2000 to an uptrend of 14.22 Tg C/yr2 (enhanced sink) during 2000–10. This shift was essentially induced by the strengthened summer monsoon, which stimulated carbon uptake, and the warming hiatus, which lessened the decrease in the NEP trend. Compared to the contribution of 56.3% by the climate effect, atmospheric CO2 concentration and nitrogen deposition had relatively small contributions (8.6 and 11.3%, respectively) to the shift. In conclusion, within the context of the global-warming hiatus, the strengthening of the summer monsoon is a critical climate factor that enhances carbon uptake in China due to the asymmetric response of photosynthesis and respiration. Our study not only revealed the shift in ecosystem carbon sequestration in China in recent decades, but also provides some insight for understanding ecosystem carbon dynamics in other monsoonal areas.

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“…Almost 5~20% of CO 2 , 15~30% CH 4 , and 60~80% N 2 O are emitted from soils to the atmosphere every year [4], which comprises a key contributor to climate warming. The concentration of greenhouse gas is closely related to the carbon and nitrogen cycles of ecosystems, and its “source-sink” relationship directly affects the response and feedback of ecosystems to climate change [5]. Therefore, the dynamics of three greenhouse gas fluxes have become an important aspect of global climate change research.…”

Section: Introductionmentioning

confidence: 99%

Emissions of CO2, CH4, and N2O Fluxes from Forest Soil in Permafrost Region of Daxing’an Mountains, Northeast China

Zang

et al. 2019

IJERPH

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With global warming, the large amount of greenhouse gas emissions released by permafrost degradation is important in the global carbon and nitrogen cycle. To study the feedback effect of greenhouse gases on climate change in permafrost regions, emissions of CO2, CH4, and N2O were continuously measured by using the static chamber-gas chromatograph method, in three forest soil ecosystems (Larix gmelinii, Pinus sylvestris var. mongolica, and Betula platyphylla) of the Daxing’an Mountains, northeast China, from May 2016 to April 2018. Their dynamic characteristics, as well as the key environmental affecting factors, were also analyzed. The results showed that the flux variation ranges of CO2, CH4, and N2O were 7.92 ± 1.30~650.93 ± 28.12 mg·m−2·h−1, −57.71 ± 4.65~32.51 ± 13.03 ug·m−2·h−1, and −3.87 ± 1.35~31.1 ± 2.92 ug·m−2·h−1, respectively. The three greenhouse gas fluxes showed significant seasonal variations, and differences in soil CO2 and CH4 fluxes between different forest types were significant. The calculation fluxes indicated that the permafrost soil of the Daxing’an Mountains may be a potential source of CO2 and N2O, and a sink of CH4. Each greenhouse gas was controlled using different key environmental factors. Based on the analysis of Q10 values and global warming potential, the obtained results demonstrated that greenhouse gas emissions from forest soil ecosystems in the permafrost region of the Daxing’an Mountains, northeast China, promote the global greenhouse effect.

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Construction and progress of Chinese terrestrial ecosystem carbon, nitrogen and water fluxes coordinated observation

Cited by 46 publications

References 127 publications

Spatial patterns and environmental factors influencing leaf carbon content in the forests and shrublands of China

Spatial patterns and environmental factors influencing leaf carbon content in the forests and shrublands of China

Altered trends in carbon uptake in China's terrestrial ecosystems under the enhanced summer monsoon and warming hiatus

Emissions of CO2, CH4, and N2O Fluxes from Forest Soil in Permafrost Region of Daxing’an Mountains, Northeast China

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