Holocene peatland development, carbon accumulation and its response to climate forcing and local conditions in Laolike peatland, northeast China

2021 ◽  
Vol 268 ◽  
pp. 107124
Author(s):  
Yanmin Dong ◽  
Hongkai Li ◽  
Hongshi He ◽  
Shengzhong Wang
Keyword(s):  
Northeast China ◽  
Carbon Accumulation ◽  
Climate Forcing ◽  
Local Conditions ◽  
Peatland Development

scholarly journals An Empirical Study of the Measurement of Spatial-Temporal Patterns and Obstacles in the Green Development of Northeast China

2020 ◽  
Vol 12 (23) ◽  
pp. 10190
Author(s):  
Yongsheng Sun ◽  
Lianjun Tong ◽  
Daqian Liu
Keyword(s):  
Economic Development ◽  
Northeast China ◽  
Temporal Patterns ◽  
Indicator System ◽  
Local Conditions ◽  
Level Indicator ◽  
Development Level ◽  
Green Development ◽  
Resource Endowment ◽  
Development Levels

Green development is not only important for realizing a sustainable development strategy, but also a key approach for constructing an ecological civilization and transforming economic development. On the basis the development concept of a coordinated human–earth relationship and the paradigm of the process–pattern mechanism, this research adopted the drivers, pressures, state, impact, and response (DPSIR) model to build a green development level indicator system. The established indicator system is then applied to explore the spatial-temporal patterns and obstacles in the green development of 34 prefectural cities in Northeast China from 2008 to 2017 by the use of the entropy weight TOPSIS model, the obstacle model and the GIS spatial visualization method. There are three main findings. First, during the research period, the spatial evolution of the green development level of cities in Northeast China has gradually shifted from a small gap at an overall low level to a large gap at an overall high level; the spatial pattern of the green development level in these cities is characterized by a decrease from north to south and obvious spatial agglomeration effects. Second, specific findings in this research fail to indicate that the correlation between the economic development level and green development level of cities in Northeast China is entirely positive. That is, cities with higher economic development levels do not necessarily have higher green development levels, while some cities with lower economic development levels did present higher green development levels, which may be related to each region’s resources and environmental carrying capacity. Third, the mechanisms influencing spatial-temporal variation in the green development level of cities in Northeast China are not identical. Among them, resource endowment conditions, economic development status and government investment scale are playing a vital role in changes in the regional green development level, and they are also behind the diverse evolutionary characteristics presented in the different stages of regional green development. For the cities in Northeast China, in the process of promoting green development and to consolidate their existing green development level, efforts should be made to overcome inefficiencies in socioeconomic growth and to continuously enhance ecological protection and environmental governance. Moreover, it is essential to promote incremental increases in the green development level on the basis of the local conditions through the ingestion, absorption and combination of each city’s own characteristics with lessons from the successful experience of different types of cities. In the future, our research should fully consider the role of urbanization, industrial structure, population density, institutional mechanisms, environmental protection supervision, scientific and technological progress and other factors on the green development level in Northeast China and seek an important entry point to achieve regional human–earth coordination.

Atmospheric circulation, hydroclimate change, and peat accumulation over the last 250 years inferred from a Sphagnum peatland in the southern Greater Khingan Mountains of Northeast China 

2021 ◽  
Author(s):  
Zuo Wang ◽  
Zicheng Yu
Keyword(s):  
Summer Monsoon ◽  
Yellow Sea ◽  
Northeast China ◽  
Carbon Accumulation ◽  
Western Pacific ◽  
The Yellow Sea ◽  
Accumulation Rates ◽  
Moisture Sources ◽  
Dry Conditions ◽  
The Western Pacific

<p>Northeast China—located near the northern limit of the influence by the East Asian summer monsoon—receives most moisture through the westerly airflow, but variations in moisture contributions from the Yellow Sea in the western Pacific Ocean determine its hydroclimate during summer monsoon season. The proportion of moisture from the Yellow Sea is strongly modulated by the location and intensity of the Western Pacific Subtropical High (WPSH). However, it is still unclear how sensitive regional hydroclimate to WPSH-modulated change in moisture sources and its impact on peatland carbon accumulation. Here, we used macrofossil data and paired δ<sup>13</sup>C and δ<sup>18</sup>O isotope analysis of Sphagnum moss cellulose from a well-dated bog from a steep mountain slope in the Greater Khingan Mountains (~47˚N) to reconstruct peatland moisture changes and elucidate past shifts in moisture sources. δ<sup>13</sup>C values reflect peatland surface moisture, as dry conditions with less water film effects would increase isotopic discrimination against <sup>13</sup>C and result in lower δ<sup>13</sup>C values. Our results from a 250-year peat record show a decrease of ~3‰ in δ<sup>13</sup>C from -25 to -28‰—with corresponding increase in dry-adapted moss Polytrichum—suggesting a drying trend since about 1980 AD. Also, the down-core δ<sup>18</sup>O and δ<sup>13</sup>C data show a positive correlation (r = 0.65, p < 0.001), in contrast with evaporative enrichment of δ<sup>18</sup>O being the dominant effect. We argue that δ<sup>18</sup>O values reflect the input of moisture derived from the Yellow Sea—that has higher δ<sup>18</sup>O values than that from the westerlies—as modulated by the WPSH. When the WPSH extends westward, it blocks moisture transport from the Yellow Sea to North China, causing low δ<sup>18</sup>O values in summer precipitation, dry conditions, and negative shifts in δ<sup>13</sup>C, and vice versa. Furthermore, carbon accumulation rates show a major decrease after the 1980s—despite that more recent peat tends to have higher apparent accumulation rates—suggesting a sensitive response of this steep-slope mountain peatland to shift in regional hydroclimate in monsoon-margin region of Northeast China.</p>

A multi-proxy record of Holocene environmental change, peatland development and carbon accumulation from Staroselsky Moch peatland, Russia

The Holocene ◽  
2015 ◽  
Vol 26 (2) ◽  
pp. 314-326 ◽  
Author(s):  
Richard J Payne ◽  
Elena Malysheva ◽  
Andrey Tsyganov ◽  
Tatjana Pampura ◽  
Elena Novenko ◽  
...  
Keyword(s):  
Environmental Change ◽  
Carbon Accumulation ◽  
Proxy Record ◽  
Peatland Development ◽  
Holocene Environmental Change

Temperature influence on peatland carbon accumulation over the last century in Northeast China

2019 ◽  
Vol 53 (3-4) ◽  
pp. 2161-2173
Author(s):  
Hanxiang Liu ◽  
Zicheng Yu ◽  
Dongxue Han ◽  
Chuanyu Gao ◽  
Xiaofei Yu ◽  
...  
Keyword(s):  
Northeast China ◽  
Carbon Accumulation ◽  
Temperature Influence

scholarly journals Recent Carbon Accumulation in Changbai Mountain Peatlands, Northeast China

2010 ◽  
Vol 30 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Kunshan Bao ◽  
Xiaofei Yu ◽  
Lin Jia ◽  
Guoping Wang
Keyword(s):  
Northeast China ◽  
Changbai Mountain ◽  
Carbon Accumulation ◽  
Mountain Peatlands

Wetland chronosequence as a model of peatland development: Vegetation succession, peat and carbon accumulation

The Holocene ◽  
2012 ◽  
Vol 23 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Eeva-Stiina Tuittila ◽  
Sari Juutinen ◽  
Steve Frolking ◽  
Minna Väliranta ◽  
Anna M Laine ◽  
...  
Keyword(s):  
Plant Communities ◽  
Growth Models ◽  
Plant Functional Types ◽  
Carbon Accumulation ◽  
Field Observations ◽  
N Accumulation ◽  
Age Cohorts ◽  
Peat Core ◽  
Functional Types ◽  
Peatland Development

Model validation experiments are fundamental to ensure that the peat growth models correspond with the diversity in nature. We evaluated the Holocene Peatland Model (HPM) simulation against the field observations from a chronosequence of peatlands and peat core data. The ongoing primary peatland formation on the isostatically rising coast of Finland offered us an exceptional opportunity to study the peatland succession along a spatial continuum and to compare it with the past succession revealed by vertical peat sequences. The current vegetation assemblages, from the seashore to a 3000 year old bog, formed a continuum from minerotrophic to ombrotrophic plant communities. A similar sequence of plant communities was found in the palaeovegetation. The distribution of plant functional types was related to peat thickness and water-table depth (WTD) supporting the assumptions in HPM, though there were some differences between the field data and HPM. Palaeobotanical evidence from the oldest site showed a rapid fen–bog transition, indicated by a coincidental decrease in minerotrophic plant functional types and an increase in ombrotrophic plant functional types. The long-term mean rate of carbon (C) accumulation varied from 2 to 34 g C/m2 per yr, being highest in the intermediate age cohorts. Mean nitrogen (N) accumulation varied from 0.1 to 3.9 g N/m2 per yr being highest in the youngest sites. WTD was the deepest in the oldest sites and its variation there was temporally the least but spatially the highest. Evaluation of the HPM simulations against the field observations indicated that HPM reasonably well simulates peatland development, except for very young peatlands.

Carbon accumulation in peatlands along a boreal to subarctic transect in eastern Canada

The Holocene ◽  
2021 ◽  
pp. 095968362098803
Author(s):  
Guillaume Primeau ◽  
Michelle Garneau
Keyword(s):  
20Th Century ◽  
Growing Season ◽  
Climatic Conditions ◽  
Carbon Accumulation ◽  
Eastern Canada ◽  
Hydrological Conditions ◽  
Recent Warming ◽  
Peatland Development ◽  
Ecosystem State

In this study, we investigated the links between peat carbon accumulation and past ecological and hydrological conditions in three peatlands (Bouleau, Mista, Auassat) which developed along a South-North transect within a watershed encompassing the boreal and subarctic domain in Eastern Canada. Peatland development and long-term apparent rates of carbon accumulation (LORCA) were asynchronous in the watershed, suggesting an influence of both latitude and topography (altitude) on the length of the growing season (GGD0). Results show that peat initiation within the three peatlands (respectively ca. 9070, 8400, and 6270 cal BP) was delayed after the deglaciation and that LORCA (respectively 35.5, 15.4, and 9.0 g C m−2 yr−1) decreased from South to North. Peatland development and fen to bog transitions were found to be almost synchronous for the two southernmost sites. The fen to bog transition in the northernmost subarctic site was delayed until the 20th century, owing to the less favorable climatic conditions. This suggests that recent warming has extended the length of the growing season and increased Sphagnum growth enough to potentially influence an ecosystem state-shift as observed in other Subarctic regions of eastern Canada.

Warming in Spring and Summer Lessens Carbon Accumulation over the Past Century in Temperate Wetlands of Northeast China

Wetlands ◽  
2017 ◽  
Vol 37 (5) ◽  
pp. 829-836 ◽  
Author(s):  
Zhongsheng Zhang ◽  
Zhenshan Xue ◽  
Xianguo Lu ◽  
Ming Jiang ◽  
Dehua Mao ◽  
...  
Keyword(s):  
Northeast China ◽  
Carbon Accumulation ◽  
Past Century ◽  
The Past ◽  
Temperate Wetlands

scholarly journals Modelling long-term alluvial peatland dynamics in temperate river floodplains

2021 ◽  
Author(s):  
Ward Swinnen ◽  
Nils Broothaerts ◽  
Gert Verstraeten
Keyword(s):  
River Basin ◽  
River Channel ◽  
River Network ◽  
Local Conditions ◽  
Channel Dynamics ◽  
River Floodplains ◽  
Modelling Framework ◽  
Peatland Development ◽  
River Valleys

Abstract. Peat growth is a frequent phenomenon in European river valleys. The presence of peat in the floodplain stratigraphy makes them hotspots of carbon storage. The long-term dynamics of alluvial peatlands are complex due to interactions between the peat and the local river network, and as a result, alluvial peatland development in relation to both regional and local conditions is not well understood. In this study, a new modelling framework is presented to simulate long-term peatland development in river floodplains by coupling a river basin hydrology model (STREAM) with a local peat growth model (modified version of Digibog). The model is applied to two lowland rivers in northern Belgium, located in the European loess (Dijle river) and sand (Grote Nete river) belts. Parameter sensitivity analysis and scenario analysis are used to study the relative importance of internal processes and environmental conditions on peatland development. The simulation results demonstrate that the peat thickness is largely determined by the spacing and mobility of the local river channel(s) rather than by channel characteristics or peat properties. In contrast, changes in regional conditions such as climate and land cover across the upstream river basin showed to influence the river hydrograph, but have a limited effect on peat growth. These results demonstrate that alluvial peatland development is strongly determined by the geomorphic boundary conditions set by the river network and as such models must account for river channel dynamics to adequately simulate peatland development trajectories in valley environments.

scholarly journals Holocene development of subarctic permafrost peatlands in Finnmark, northern Norway

The Holocene ◽  
2018 ◽  
Vol 28 (12) ◽  
pp. 1855-1869 ◽  
Author(s):  
Sofia E Kjellman ◽  
Pia E Axelsson ◽  
Bernd Etzelmüller ◽  
Sebastian Westermann ◽  
A Britta K Sannel
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Accumulation Rate ◽  
Time Lag ◽  
Plant Macrofossils ◽  
Carbon Accumulation ◽  
Northern Norway ◽  
Geochemical Properties ◽  
Peatland Development ◽  
The Mean

Subarctic permafrost peatlands are important soil organic carbon pools, and improved knowledge about peat properties and peatland sensitivity to past climate change is essential when predicting future response to a warmer climate and associated feedback mechanisms. In this study, Holocene peatland development and permafrost dynamics of four subarctic peat plateaus in Finnmark, northern Norway have been investigated through detailed analyses of plant macrofossils and geochemical properties. Peatland inception occurred around 9800 cal. yr BP and 9200 cal. yr BP at the two continental sites Suossjavri and Iskoras. Younger basal peat ages were found at the two coastal locations Lakselv and Karlebotn, at least partly caused by the time lag between deglaciation and emergence of land by isostatic uplift. Here, peatland development started around 6150 cal. yr BP and 5150 cal. yr BP, respectively. All four peatlands developed as wet fens throughout most of the Holocene. Permafrost aggradation, causing frost heave and a shift in the vegetation assemblage from wet fen to dry bog species, probably did not occur until during the last millennium, ca. 950 cal. yr BP in Karlebotn and ca. 800 cal. yr BP in Iskoras, and before ca. 150 cal. yr BP in Lakselv and ca. 100 cal. yr BP in Suossjavri. In Karlebotn, there are indications of a possible earlier permafrost phase around 2200 cal. yr BP due to climatic cooling at the late Subboreal to early Subatlantic transition. The mean long-term Holocene carbon accumulation rate at all four sites was 12.3 ± 4.1 gC m−2 yr−1 (±SD) and the mean soil organic carbon storage was 97 ± 46 kgC m−2.

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