Article
Engineering, Environmental
Chang Liu, Gengyuan Liu, Marco Casazza, Ningyu Yan, Linyu Xu, Yan Hao, Pier Paolo Franzese, Zhifeng Yang
Summary: This study proposes a comprehensive framework and accounting method for evaluating ocean carbon sinks to assess China's total ocean carbon sink, suggesting that ocean-based solutions have significant potential for mitigating climate change. However, further investigation is needed before large-scale deployment, and measures to enhance China's ocean carbon sinks should be taken based on regional characteristics.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Mengqi Wei, Chong Du, Xuege Wang
Summary: This paper analyzes the land use changes in Jilin Province from 2011 to 2020 based on land use data, calculates changes in carbon sinks, predicts land use types and carbon sinks in 2030 using the CA-Markov model, and discusses the driving factors. The results show that cultivated land and forest land are the major land use types in Jilin Province, with changes in carbon sinks mainly coming from woodland and grassland. The factors influencing land use change include slope, roads, township centers, and socio-economic drivers.
Article
Environmental Sciences
Binbin Huang, Fei Lu, Xiaoke Wang, Xing Wu, Lu Zhang, Zhiyun Ouyang
Summary: This study, using a remote sensing data-driven model, examined the impacts of climate change, rising CO2, and ecological restoration projects (ERPs) on the regional carbon budget in the Beijing-Tianjin Sand Source Control Project zone. The results showed carbon losses due to climate change, while ERPs and rising CO2 made significant contributions to carbon sinks.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Nicole S. Lovenduski, Abhishek Chatterjee, Neil C. Swart, John C. Fyfe, Ralph F. Keeling, David Schimel
Summary: This study assesses the detectability of COVID-like emissions reductions in global atmospheric CO2 concentrations using a simulation model. The unique fingerprint of COVID in the simulated CO2 growth rate is obscured by internal variability and carbon-concentration feedbacks, making it formally detectable only with unrealistically large emissions reductions. COVID-driven changes in CO2 concentrations are overshadowed by internal variability, while carbon-concentration feedbacks further complicate signal detection in the atmosphere.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Quanzhou Gao, Haixia Peng, Peilin Liao
Summary: This study measured the chemical composition of runoff from four sub-basins in the Xizhijiang River basin to investigate the impact of lithology and land use on the chemical runoff and estimate CO2 consumed by chemical weathering. Compared to global rivers, the chemical runoff in the Xizhijiang River basin had moderate concentration of total dissolved solids and relatively higher concentration of dissolved silicon. Agricultural and industrial activities increased Cl- concentration in the river water, while trace carbonate weathering released a large amount of Ca2+. The CO2 flux fixed by chemical weathering in the mid-upstream Xizhijiang River basin is significant and can serve as a geological carbon sink if extrapolated to the entire South China region.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Xun Jiang, King-Fai Li, Mao-Chang Liang, Yuk L. Yung
Summary: This study found that during the Amazon rainforest fire season, the atmospheric CO2 concentration is about 2 ppm higher than in surrounding areas, mainly due to surface biomass burning, enhanced sinking air over the eastern part of the Amazon, and surface winds.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Yifei Qiu, Shenglu Zhou, Wendong Qin, Chuchu Zhang, Chengxiang Lv, Mengmeng Zou
Summary: Soil contamination by microplastics (MPs) varies among different land use types, with urban areas having the highest abundance of MPs. The distribution and community compositions of MPs in soil are significantly different among land use types. The geographic distance, woodlands, and freshwater sediments are potential sinks for MPs in the Lihe River watershed. Soil properties such as clay content, pH, and bulk density are significantly correlated with MP abundance and fragment shape. Human activities, particularly population density and Total-Point of Interest (POI), play a vital role in exacerbating soil MP pollution. Plastic waste is a major source of MPs in urban, tea garden, dryland, and paddy field soils.
Article
Environmental Sciences
Weixiang Cai, Nianpeng He, Li Xu, Mingxu Li, Ding Wen, Shirong Liu, Osbert Jianxin Sun
Summary: Afforestation and reforestation are effective solutions for enhancing carbon sinks. However, the absence of spatial-temporal maps for carbon sequestration rate (CSR) hinders forest management planning. This study assessed the CSR for A&R at different levels in China. Results showed significant spatial-temporal variations in CSR, primarily regulated by temperature and precipitation. These hierarchical spatiotemporal maps can assist in identifying priority areas for forest management and carbon trade policies to achieve carbon neutrality.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Studies
Albert Tonghoon Han, Thomas L. Daniels, Chaeri Kim
Summary: Greenbelts are large areas of open land near cities and suburbs, with the purpose of limiting urban growth and protecting natural resources. This study analyzes the performance of six greenbelt counties in controlling urban sprawl and retaining land, and compares them to adjacent counties without greenbelts. The study also examines the conversion of different land cover types in the greenbelt counties and identifies which types should be prioritized for conservation based on their carbon storage and sequestration capacity.
Article
Biodiversity Conservation
Jiaxiang Liu, Zheng Wang, Yafeng Duan, Xinrui Li, Mingyang Zhang, Huiyu Liu, Peng Xue, Haibo Gong, Xing Wang, Yu Chen, Yinuo Geng
Summary: This study used landscape pattern and data analysis methods to explore the impact of land use dynamics on Net Ecosystem Productivity (NEP) in China. The results showed that most regions did not experience significant changes in NEP, while land use patterns exhibited increased fragmentation and shape complexity, decreased connectivity, and trend shifts. The relationship between land use patterns and NEP was insignificant in most areas, but significant in some regions. These findings emphasize the importance of nonlinear analysis in understanding the spatial-temporal changes of NEP and land use patterns, and deepen our understanding of the impacts of land use changes on NEP.
ECOLOGICAL INDICATORS
(2023)
Article
Green & Sustainable Science & Technology
Lei Hua, Rong Ran, Mingjuan Xie, Tingrou Li
Summary: Using remote sensing images and socio-economic data, this study analyzed changes in land carbon sink capacity in poverty-stricken counties and identified relevant impact factors through geographic detectors. The results showed significant changes in carbon sink-type land and a continuous decrease in the snow area, resulting in a decrease in grassland area and an increase in barren area. The land carbon sink capacity in poverty-stricken counties during the eradication of extreme poverty was 2.74 times higher than before this period. The geographic detector analysis found strong explanatory power in cash crops per capita, share of secondary industry, population density, and per capita savings on the changes in carbon sink capacity in poverty-stricken counties.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Environmental Sciences
Yingying Wang, Weifeng Yang, Yihua Cai, Ziming Fang, Xiufeng Zhao, Qinghua Zhang, Hao Yuan, Na Lin, Chenyi Zou, Minfang Zheng
Summary: The study examined the carbon sink and sources in sediments of a macroalgae cultivation field in Sansha Bay, Southeast China. The results showed that macroalgae-derived organic carbon accounted for less than 35% of the total organic carbon. A preliminary estimate suggested that macroalgae-induced carbon sink represented only 8.2 x 10^3 tons per year, which is relatively insignificant on a national or global scale. However, considering the small cultivation area, the impact of macroalgae culture on carbon sink should still be taken into account.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biodiversity Conservation
Jiqun Wen, Xiaowei Chuai, Tianhui Zuo, Helen Huifen Cai, Limin Cai, Rongqin Zhao, Yingyin Chen
Summary: China's diversified landforms and the use of three-dimensional space area calculation have provided accurate information on China's land use change and carbon variations. This study introduced a new method to examine China's surface area and analyze the changes in terrestrial carbon from 2000 to 2020. The findings indicate a 13.9% increase in China's surface area compared to the planar area, with a total increase of 133 x 104 km2. The southwest region had the highest rate of area increase, particularly in woodland. The study also revealed a significant carbon loss due to land use change, with woodland experiencing the highest carbon release compared to other land types. The protection of woodland in mountainous regions requires further attention.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Studies
Mengdi Li, Yaoping Cui, Jinwei Dong, Yaochen Qin
Summary: This study examines the impacts of abandoned cropland and impervious surface expansion on net ecosystem productivity (NEP) in China. The findings suggest that abandoned cropland plays a crucial role in enhancing natural carbon sinks, while impervious surface expansion contributes significantly to carbon sources.
ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
(2024)
Article
Forestry
Mi Wang, Zhuowei Hu, Xuetong Wang, Xiaojuan Li, Yongcai Wang, Honghao Liu, Chaoqi Han, Junhao Cai, Wenji Zhao
Summary: Based on the study of carbon balance in the Loess Plateau, it was found that carbon sinks have been continuously increasing, decreasing from north to south and mainly influenced by climate and land use. Carbon sources are mainly concentrated in the middle temperate zone, linked to impervious land, unused land, and grassland; while carbon sinks are mainly concentrated in the south temperate zone and plateau climatic zone, linked to forest, grassland, and cultivated land. The study highlights the importance of CO2 concentration, temperature, and precipitation in influencing net ecosystem productivity.
Article
Agriculture, Multidisciplinary
Chunyu Wang, Sien Li, Mousong Wu, Xuhui Wang, Shangjin Wang, Zhenyu Guo, Siyu Huang, Hanbo Yang, Liang Gao
Summary: This study conducted field observation experiments for three years to compare the comprehensive benefits of different film mulching irrigation methods on greenhouse gas emissions, grain yield, water and fertilizer efficiency in maize fields. The results showed that drip irrigation under mulch (DM) had lower N2O emissions (32.46%), higher CH4 absorption (23.49%), and lower CO2 emissions (4.53%) compared to border irrigation under mulch (BM). Different environmental factors played varying roles in controlling greenhouse gas fluxes under the two treatments. Maize yield, irrigation water use efficiency (IWUE), and partial factor productivity of applied nitrogen (PFPN) were higher under DM by 17.85%, 17.90%, and 71.84% respectively, while the global warming potential (GWP) and greenhouse gas emission intensity (GHGI) under DM were lower by 6.65% and 20.79% respectively compared to BM. This research provides valuable insights into agricultural development in arid areas.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Yan Sun, Daniel S. Goll, Yuanyuan Huang, Philippe Ciais, Ying-Ping Wang, Vladislav Bastrikov, Yilong Wang
Summary: Global change ecology is facing a bottleneck in the development of large-scale ecological models due to high computational requirements. To address this challenge, a machine-learning acceleration (MLA) tool is introduced to reduce the computation demand for equilibrating biogeochemical cycles in terrestrial biosphere models (TBMs). The MLA achieved a 77%-80% reduction in computation time by interpolating the equilibrated state of biogeochemical variables. Although there were minor biases in the MLA-derived equilibrium, it had a minimal impact on the predicted regional carbon balance.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Biodiversity Conservation
Yue He, Yongwen Liu, Lingjie Lei, Cesar Terrer, Chris Huntingford, Josep Penuelas, Hao Xu, Shilong Piao
Summary: CO2 fertilization has contributed more than half of the increase in biomass carbon storage in forests over the past decades, as revealed by integrating CO2-enrichment experiments, dynamic global vegetation models, and observation-based biomass datasets.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Biodiversity Conservation
Yanzi Yan, Ronny Lauerwald, Xuhui Wang, Pierre Regnier, Philippe Ciais, Lishan Ran, Yuanyi Gao, Ling Huang, Yao Zhang, Zheng Duan, Fabrice Papa, Bing Yu, Shilong Piao
Summary: This study presents a model capable of accurately simulating dissolved organic carbon (DOC) concentrations and fluxes in rivers across China. The model shows that while DOC concentrations in Chinese rivers have not changed significantly over the past 15 years, there has been a significant increase in DOC fluxes, particularly in the Yangtze River Basin and the Huaihe River Basin. These increases are attributed to anthropogenic activities, although hydrology still plays a dominant role in determining the variability of DOC. With projected increases in river discharge due to a wetter climate, it is likely that DOC fluxes will continue to increase in the future.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Ecology
Xiaomin Wang, Shanyun Wang, Yuanhe Yang, Hanqin Tian, Mike S. M. Jetten, Changchun Song, Guibing Zhu
Summary: Since the start of the Anthropocene, northern seasonally frozen peatlands have been warming rapidly, resulting in increased nitrogen mineralization and substantial emissions of nitrous oxide (N2O) during the thawing periods in spring. Heterotrophic bacterial and fungal denitrification were identified as the main sources of N2O in frozen peatland profiles. Thawing significantly stimulates the expression of genes encoding N2O-producing protein complexes, leading to high N2O emissions during the spring thawing period.
Article
Geosciences, Multidisciplinary
Zhe Jin, Tao Wang, Hongqin Zhang, Yilong Wang, Jinzhi Ding, Xiangjun Tian
Summary: Satellite carbon dioxide retrievals have provided important constraints on surface carbon fluxes in undersampled regions. This study developed an atmospheric inversion system to estimate CO2 sources and sinks using Orbiting Carbon Observatory-2 (OCO-2) column CO2 retrievals from 2015 to 2019, and compared the estimates with other state-of-the-art inversions. Assimilating satellite CO2 retrievals, the global net terrestrial carbon sink (net biome productivity, NBP) was estimated to be 1.03 +/- 0.39 petagrams of carbon per year (PgC yr(-1)), lower than estimates from surface-based inversions. The results showed a weak northern uptake and weak tropical release of carbon, consistent with previous reports. In contrast, the other inversions showed a strong northern uptake but varied tropical carbon fluxes. During the 2015-2016 El Nino event, the tropical land biosphere played a significant role in global CO2 growth rate, while the anomalously high carbon uptake in the northern extratropics partially offset the tropical carbon losses.
SCIENCE CHINA-EARTH SCIENCES
(2023)
Article
Computer Science, Information Systems
Yuan Liu, Chuang Zhang, Yu Yan, Xin Zhou, Zhihong Tian, Jie Zhang
Summary: This study proposes a semi-centralized trust management system architecture based on blockchain to support various applications and services with massive IoT devices. The IoT devices are centralized organized by cloud servers, which maintain a rating data ledger within each domain using the proposed rotation-based consensus protocol. A computational trust model is proposed to identify and mitigate the influence of malicious devices by aggregating direct and indirect trust information. Simulation experiments and comparisons with classical models demonstrate the effectiveness of the proposed trust model in identifying and mitigating the influence of malicious devices.
IEEE TRANSACTIONS ON SERVICES COMPUTING
(2023)
Article
Food Science & Technology
Jin Fu, Yiwei Jian, Xuhui Wang, Laurent Li, Philippe Ciais, Jakob Zscheischler, Yin Wang, Yanhong Tang, Christoph Mueller, Heidi Webber, Bo Yang, Yali Wu, Qihui Wang, Xiaoqing Cui, Weichen Huang, Yongqiang Liu, Pengjun Zhao, Shilong Piao, Feng Zhou
Summary: Extreme rainfall has a significant impact on rice yield in China, resulting in reductions comparable to those caused by extreme heat. The main mechanisms of these impacts are the limitation of nitrogen availability for tillering and the physical disturbance on pollination. Projection suggests an additional 8% yield reduction due to extreme rainfall under warmer climate by the end of the century. These findings emphasize the importance of considering extreme rainfall in food security assessments.
Article
Environmental Sciences
Xianlei Fan, Edith Bai, Jing Zhang, Xuhui Wang, Wenping Yuan, Shilong Piao
Summary: Soil organic carbon mainly comes from plants through litter decomposition. A new submodel for litter decomposition incorporating the microbial biomass effect was developed based on the Michaelis-Menten kinetics. The submodel was coupled with plant and soil submodels to simulate carbon cycling in US ecosystems. The transfer efficiency of carbon from plants to soil was quantified, providing an empirical proxy for diagnosing ecosystem carbon cycling and projecting carbon fluxes and pool sizes in response to climate change.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Letter
Biodiversity Conservation
Shilong Piao, Xuhui Wang
GLOBAL CHANGE BIOLOGY
(2023)
Article
Biodiversity Conservation
Zihao Bian, Hanqin Tian, Shufen Pan, Hao Shi, Chaoqun Lu, Christopher Anderson, Wei-Jun Cai, Charles S. Hopkinson, Dubravko Justic, Latif Kalin, Steven Lohrenz, Steven Mcnulty, Naiqing Pan, Ge Sun, Zhuonan Wang, Yuanzhi Yao, Yongfa You
Summary: Human-induced nitrogen-phosphorus imbalance can impact the structure and functioning of aquatic ecosystems. The study suggests that different release rates of soil legacy nutrients contribute to the decreasing N:P loading ratio. The findings underscore the importance of controlling nitrogen loading and integrating soil legacy phosphorus into nutrient management strategies.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Environmental Sciences
Zihao Bian, Ge Sun, Steven McNulty, Shufen Pan, Hanqin Tian
Summary: This study improved a distributed regional land surface model to evaluate the impacts of climate and land use changes on soil erosion and sediment yield in the Mississippi River Basin (MRB) over the past century. The results showed that despite no significant increase in annual precipitation and runoff, sediment yield significantly increased during 1980-2018, mainly driven by intensified extreme precipitation. Land use change played a critical role in determining sediment yield in the early 20th century, while climate variability became the dominant driver in recent decades. Extreme climate is increasingly affecting soil erosion and sedimentation, emphasizing the need to revisit existing Best Management Practices for water quality in the MRB.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Linchao Li, Bin Wang, Puyu Feng, Jonas Jagermeyr, Senthold Asseng, Christoph Mueller, Ian Macadam, De Li Liu, Cathy Waters, Yajie Zhang, Qinsi He, Yu Shi, Shang Chen, Xiaowei Guo, Yi Li, Jianqiang He, Hao Feng, Guijun Yang, Hanqin Tian, Qiang Yu
Summary: This study investigates the influence of ensemble configurations on crop yield projections and modeling uncertainty. The findings suggest that specific ensemble compositions and sizes can effectively capture modeling uncertainty and represent the full ensemble. The contribution of individual crop models to the overall uncertainty varies by region and crop type, emphasizing the importance of considering specific models in local-scale applications.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Dan Zhu, Yilong Wang, Philippe Ciais, Frederic Chevallier, Shushi Peng, Yao Zhang, Xuhui Wang
Summary: The relationship between spring temperatures and carbon uptake in the northern high latitudes remains positively correlated, despite fluctuations in the correlation over the past few decades.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Ling Huang, Xuhui Wang, Yanzi Yan, Lei Jin, Kun Yang, Anping Chen, Rongshun Zheng, Catherine Ottle, Chenzhi Wang, Yaokui Cui, Shilong Piao
Summary: Lake surface water temperature (LSWT) is a key parameter in lake energy budget and is highly vulnerable to climate change. This study used a lake model to simulate LSWT for 91 large lakes across China over a 40-year period. The results show an overall warming trend in LSWT, but with large spatial variations. The study also identifies air temperature, downward longwave radiation, and wind speed as the most important climatic drivers for LSWT changes.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
