Carbon dynamics of peatlands in China during the Holocene

Wang, Mei; Chen, Huai; Wu, Ning; Peng, Changhui; Zhu, Qiuan; Zhu, Dan; Yang, Guanying; Wu, Jianghua; He, Yixin; Gao, Yongheng; Tian, Jianqing; Zhao, Xinquan

doi:10.1016/j.quascirev.2014.06.004

Cited by 53 publications

(47 citation statements)

References 45 publications

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“…Similarly, the peak peatland initiation and peat C sequestration occurred at the Holocene Thermal Maximum (HTM) period in Zoige (Fig. 6), in line with the previous study (Sun et al, 1998;Wang et al, 2014;Zhao et al, 2014). Also, a study indicated that warming in recent decades increased the height, coverage and corresponding aboveground biomass of vegetation on the QTP (Zhou et al, 2000).…”

supporting

confidence: 88%

Higher recent peat C accumulation than that during the Holocene on the Zoige Plateau

Wang

Yang

Gao

et al. 2015

Quaternary Science Reviews

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supporting

confidence: 88%

Higher recent peat C accumulation than that during the Holocene on the Zoige Plateau

Wang

Yang

Gao

et al. 2015

Quaternary Science Reviews

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“…This study estimated that the potential total peatland area in the SJP was about 10,520 km 2 , much larger than previous studies (Huang et al, 2009;Liu et al, 2012;Wang et al, 2014). Previous evaluations of the peatland area in the SJP were achieved through the extrapolation of remote sensing images; however, it contained several uncertainties.…”

Section: Total Peatland Area and Current Carbon Storage In The Sjpmentioning

confidence: 63%

Holocene peatland initiation and carbon storage in temperate peatlands of the Sanjiang Plain, Northeast China

et al. 2015

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The Sanjiang Plain (SJP) wetland is the largest freshwater marshland in China. Peatlands were initiated early and are widely distributed across the SJP and form a large carbon (C) pool. Consequently, there is a growing interest in understanding past, present, and future peatland dynamics. Most studies on peatland dynamics have been carried out on boreal and subarctic region; however, there are limited data about peatland dynamics on temperate region, such as SJP wetland, which is sensitive to climate change and human disturbance. Here, we presented a data synthesis of basal peat ages, peatland area, and peat C accumulation rate in the SJP to examine Holocene peatland dynamics and climate sensitivity, along with total C storage and their future fate. We show that peatland initiation in the SJP started in the early Holocene, but the most intense period of peatland initiation occurred during the late Holocene, when the climate was colder and drier than the early and mid-Holocene. And the C accumulation rate also continued to increase during the late Holocene. Our results suggest that insolation and monsoon intensity as well as the local topographic characteristics and hydrology during the late Holocene in the SJP might have played an important role in causing the highest rates of peatland initiation and C accumulation. Based on the Second National Wetland Resources Survey data, we estimated that the total peatland covered an area of about 10,520 km 2 on the SJP and currently stores ~0.26 Pg C. However, human activities, together with the widespread warming on the SJP over the past 60 years, not only reduce the area of wetlands but also have switched it from being a net C sink to a significant C source.

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“…CAR synthesized for peatlands on the QTP (n = 20) (Wang et al . ). C. CAR in Dahu Swamp (the dashed line represents the quadratic polynomial regression curve).…”

Section: Discussionmentioning

confidence: 97%

“…On the QTP, the synthesized peat CAR (based on 20 coring sites) ranges from 20.7 to 50.2 gC m −2 a −1 , with a mean value of 32.3 gC m −2 a −1 (Wang et al . ). The long‐term CAR values on the QTP appear to have been low in the Lateglacial period, but high in the early‐ and mid‐Holocene and have been gradually decreasing since the middle Holocene, which is similar to the global trend for northern peatlands (Yu et al .…”

Section: Discussionmentioning

confidence: 97%

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Carbon accumulation in Dahu Swamp in the eastern Nanling Mountains (south China) and its implications for hydroclimatic variability over the past 47 000 years

Wei

Shang

et al. 2017

Boreas

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Wetlands act as persistent natural carbon sinks over long time scales. Understanding the response of these carbon reservoirs to climate change is critical to assessing potential climate feedbacks. We conducted a study of an 860‐cm‐long sediment core in Dahu Swamp in south China to determine how the carbon accumulation rate (CAR) has varied as a function of palaeohydrology and palaeoclimate over the past 47 000 years. From an orbital time scale, our results show that the CAR in Dahu Swamp is relatively low in the wet periods of Marine Isotope Stage 3 (MIS 3) (mean: 46.7 gC m−2 a−1) and MIS 1 (mean: 28.2 gC m−2 a−1), compared to the dry periods of MIS 2 (mean: 59.9 gC m−2 a−1). At centennial and millennial scales, the highest CARs of Dahu Swamp mainly occur in organic‐rich silt or clay (gyttja) layers, which correspond to the relatively dry climate (e.g. c. 48 000–41 000, c. 33 000–32 000, c. 15 800–14 900 and c. 4400–4250 cal. a BP). The CAR of Dahu Swamp is mainly controlled by local hydrological variations that are closely related to the East Asian summer monsoon (EASM) intensity, which may be co‐influenced by orbitally induced summer insolation forcing and internal feedback processes (e.g. Atlantic Meridional Overturning Circulation and El Niño/Southern Oscillation). Based on comparison with the CARs in monsoonal regions of China, we consider that precipitation may be the key factor for wetland CAR in EASM areas, whereas temperature is more important in Qinghai–Tibetan Plateau regions under Indian summer monsoon influence. The CAR of Dahu Swamp provides valuable records of wetland carbon accumulation dynamics in subtropical monsoon regions, which contradict the traditional patterns in global northern wetlands.

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Carbon dynamics of peatlands in China during the Holocene

Cited by 53 publications

References 45 publications

Higher recent peat C accumulation than that during the Holocene on the Zoige Plateau

Higher recent peat C accumulation than that during the Holocene on the Zoige Plateau

Holocene peatland initiation and carbon storage in temperate peatlands of the Sanjiang Plain, Northeast China

Carbon accumulation in Dahu Swamp in the eastern Nanling Mountains (south China) and its implications for hydroclimatic variability over the past 47 000 years

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