Substantially Enhanced Landscape Carbon Sink Due To Reduced Terrestrial‐Aquatic Carbon Transfer Through Soil Conservation in the Chinese Loess Plateau

Ran, Lishan; Fang, Nianqiao; Wang, Xuhui; Piao, Shilong; Chan, Chun Ngai; Li, Siliang; Zeng, Yi; Shi, Zhihua; Tian, Mingyang; Xu, Y. Jun; Qi, Junyu; Liu, Boyi

doi:10.1029/2023ef003602

Cited by 8 publications

(2 citation statements)

References 56 publications

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“…Consequently, the inland water C emissions on the Loess Plateau play a disproportionately small role in offsetting the corresponding terrestrial C sink, considerably lower than that in tropical and temperate regions (for example, Butman & Raymond, 2011; Duvert et al., 2020). Large‐scale soil conservation in this region has further reduced the C emission fluxes and accordingly, their significance in landscape‐scale C budget (Ran et al., 2023).…”

Section: Driving Factors Of Carbon Emissions From Chinese Inland Watersmentioning

confidence: 99%

Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Yang,

Chen,

et al. 2024

JGR Biogeosciences

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Inland waters are significant emitters of greenhouse gases for the atmosphere and play an important role in the global carbon cycle. With a vast land area in East Asia spanning a broad range of climatic conditions, China has a large number of natural and human‐made water bodies. These inland water systems are of global importance because of their high carbon emission fluxes. Over the past decades, China has experienced unprecedented environmental changes driven by rapid economic development, which have profoundly modified its inland water carbon biogeochemistry and associated emissions. This review focuses on carbon dioxide (CO2) and methane (CH4) emission dynamics from China's inland waters in response to global change. Major drivers of CO2 and CH4 emissions, including aquatic metabolism, hydrological and climatic factors, and prevailing human impacts, are examined. To advance our understanding of carbon emissions from China's inland waters, we further identify several critical knowledge gaps, such as inadequate research in headwater streams and the climate‐sensitive Tibetan Plateau aquatic ecosystems. Furthermore, insufficient understanding of carbon emissions from inland waters undergoing extensive human interventions (e.g., damming, flow regulation, pollution, and farming practices in aquaculture ponds) is highlighted. We suggest that future efforts should be made to better capture the spatiotemporal heterogeneity in dissolved CO2 and CH4 concentrations and fluxes across China as well as their long‐term trends. To overcome uncertainties in carbon sources and current flux estimates, future research to mechanistically understand carbon transport and transformation in Chinese inland waters and their underlying processes is particularly needed.

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Section: Driving Factors Of Carbon Emissions From Chinese Inland Watersmentioning

confidence: 99%

Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Yang,

Chen,

et al. 2024

JGR Biogeosciences

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“…However, there are still many shortcomings. First, evaluations of terrestrial ecosystem carbon are usually conducted at large scales, such as continents (Winkler et al 2023), countries (Uchale et al 2023) and provinces (Ran et al 2023), and the resolution is often not high. Additionally, due to the use of different data sources and models, such as the Ecosystem process modelling method (He et al 2019), the Atmospheric inversion method , the Eddy covariance method (Yu et al 2014) and the Inventory method (Piao et al 2009), the amount of carbon sink/ source in China still faces significant uncertainties; carbon sink values varied between 0.1 Pg C/yr and higher than 1.0 Pg C/yr (Chuai et al 2018).…”

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confidence: 99%

Promoting low-carbon land use: from theory to practical application through exploring new methods

Chuai,

Xu,

Liu

et al. 2024

Humanit Soc Sci Commun

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Cities are main carbon emissions generators. Land use changes can not only affect terrestrial ecosystems carbon, but also anthropogenic carbon emissions. However, carbon monitoring at a spatial level is still coarse, and low-carbon land use encounters the challenge of being unable to adjust at the patch scale. This study addresses these limitations by using land-use data and various auxiliary data to explore new methods. The approach involves developing a high-resolution carbon monitoring model and investigating a patch-scale low-carbon land use model by integrating high carbon sink/source images with the Future Land Use Simulation model. Between 2000 and 2020, the results reveal an increasing trend in both carbon emissions and carbon sinks in the Shangyu district. Carbon sinks can only offset approximately 3% of the total carbon emissions. Spatially, the north exhibits net carbon emissions, while the southern region functions more as a carbon sink. A total of 14.5% of the total land area witnessed a change in land-use type, with the transfer-out of cropland constituting the largest area at 96.44 km2, accounting for 50% of the total transferred area. Land-use transfer resulted in an annual increase of 77.72 × 104 t in carbon emissions between 2000 and 2020. Through land-use structure optimisation, carbon emissions are projected to increase by only 7154 t C/year from 2000 to 2030, significantly lower than the amount between 2000 and 2020. Further low-carbon land optimisation at the patch scale can enhance the carbon sink by 129.59 t C/year. The conclusion drawn is that there is considerable potential to reduce carbon emissions through land use control. The new methods developed in our study can effectively contribute to high-resolution carbon monitoring in spatial contexts and support low-carbon land use, promoting the application of low-carbon land use from theory to practice. This will provide technological guidance for land use planning, city planning, and so forth.

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Retrieval of suspended sediment concentrations using remote sensing and machine learning methods: A case study of the lower Yellow River

Hu,

Miao,

Zhang

et al. 2023

Journal of Hydrology

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Substantially Enhanced Landscape Carbon Sink Due To Reduced Terrestrial‐Aquatic Carbon Transfer Through Soil Conservation in the Chinese Loess Plateau

Cited by 8 publications

References 56 publications

Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Promoting low-carbon land use: from theory to practical application through exploring new methods

Retrieval of suspended sediment concentrations using remote sensing and machine learning methods: A case study of the lower Yellow River

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