Journal: Science Bulletin

Abbreviation

Sci. Bull.

Publisher

Elsevier

Journal Volumes

ISSN

2095-9273

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2017 - 201942020 - 20249
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Publications 1 - 10 of 13
  • Plume-ridge interaction induced migration of the Hawaiian-Emperor seamounts
    Item type: Journal Article
    Sun, Weidong; Langmuir, Charles H.; Ribe, Neil M.; et al. (2021)
    Science Bulletin
    The history of the Hawaiian hotspot is of enduring interest in studies of plate motion and mantle flow, and has been investigated by many researchers using the detailed history of the Hawaiian-Emperor Seamount chain. One of the unexplained aspects of this history is the apparent offset of several Emperor seamounts from the Hawaii plume track. Here we show that the volcanic migration rates of the Emperor seamounts based on existing data are inconsistent with the drifting rate of the Pacific plate, and indicate northward and then southward “absolute movements” of the seamounts. Numerical modeling suggests that attraction and capture of the upper part of the plume by a moving spreading ridge led to variation in the location of the plume’s magmatic output at the surface. Flow of the plume material towards the ridge led to apparent southward movement of Meiji. Then, the upper part of the plume was carried northward until 65 Ma ago. After the ridge and the plume became sufficiently separated, magmatic output moved back to be centered over the plume stem. These changes are apparent in variations in the volume of seamounts along the plume track. Chemical and isotopic compositions of basalt from the Emperor Seamount chain changed from depleted (strong mid-ocean ridge affinity) in Meiji and Detroit to enriched (ocean island type), supporting declining influence from the ridge. Although its surface expression was modified by mantle flow and by plume-ridge interactions, the stem of the Hawaiian plume may have been essentially stationary during the Emperor period. (© 2021 Science China Press. Published by Elsevier )
  • Fuels from water, CO2 and solar energy
    Item type: Journal Article
    Hao, Yong; Steinfeld, Aldo (2017)
    Science Bulletin
  • Perspective on smart materials for empowering small-scale manipulation
    Item type: Other Journal Item
    Zhang, Mingchao; Sitti, Metin (2024)
    Science Bulletin
  • High population and dispersion of pentacoordinated AlV species on the surface of flame-made amorphous silica-alumina
    Item type: Journal Article
    Wang, Zichun; Jiang, Yijiao; Yi, Xianfeng; et al. (2019)
    Science Bulletin
  • Water consumption and biodiversity: Responses to global emergency events
    Item type: Journal Article
    Zhao, Dandan; Liu, Junguo; Sun, Laixiang; et al. (2024)
    Science Bulletin
    Given that it was a once-in-a-century emergency event, the confinement measures related to the coronavirus disease 2019 (COVID-19) pandemic caused diverse disruptions and changes in life and work patterns. These changes significantly affected water consumption both during and after the pandemic, with direct and indirect consequences on biodiversity. However, there has been a lack of holistic evaluation of these responses. Here, we propose a novel framework to study the impacts of this unique global emergency event by embedding an environmentally extended supply-constrained global multi-regional input-output model (MRIO) into the drivers-pressure-state-impact-response (DPSIR) framework. This framework allowed us to develop scenarios related to COVID-19 confinement measures to quantify country-sector-specific changes in freshwater consumption and the associated changes in biodiversity for the period of 2020–2025. The results suggest progressively diminishing impacts due to the implementation of COVID-19 vaccines and the socio-economic system's self-adjustment to the new normal. In 2020, the confinement measures were estimated to decrease global water consumption by about 5.7% on average across all scenarios when compared with the baseline level with no confinement measures. Further, such a decrease is estimated to lead to a reduction of around 5% in the related pressure on biodiversity. Given the interdependencies and interactions across global supply chains, even those countries and sectors that were not directly affected by the COVID-19 shocks experienced significant impacts: Our results indicate that the supply chain propagations contributed to 79% of the total estimated decrease in water consumption and 84% of the reduction in biodiversity loss on average. Our study demonstrates that the MRIO-enhanced DSPIR framework can help quantify resource pressures and the resultant environmental impacts across supply chains when facing a global emergency event. Further, we recommend the development of more locally based water conservation measures—to mitigate the effects of trade disruptions—and the explicit inclusion of water resources in post-pandemic recovery schemes. In addition, innovations that help conserve natural resources are essential for maintaining environmental gains in the post-pandemic world.
  • Perspectives on antiferromagnetic magnonics
    Item type: Other Journal Item
    Wang, Hanchen; Yu, Haiming (2024)
    Science Bulletin
  • Let the sun shine into a brighter future: an interview with Prof. Aldo Steinfeld
    Item type: Other Journal Item
    Hao, Yong; Zou, Wenjuan; An, Rui (2017)
    Science Bulletin
  • Anchoring Co3O4 nanoparticles on MXene for efficient electrocatalytic oxygen evolution
    Item type: Journal Article
    Lu, Yi; Fan, Deqi; Chen, Zupeng; et al. (2020)
    Science Bulletin
  • Recent selection and introgression facilitated high-altitude adaptation in cattle
    Item type: Journal Article
    Lyu, Yang; Wang, Fuwen; Cheng, Haijian; et al. (2024)
    Science Bulletin
    During the past 3000 years, cattle on the Qinghai-Xizang Plateau have developed adaptive phenotypes under the selective pressure of hypoxia, ultraviolet (UV) radiation, and extreme cold. The genetic mechanism underlying this rapid adaptation is not yet well understood. Here, we present whole-genome resequencing data for 258 cattle from 32 cattle breeds/populations, including 89 Tibetan cattle representing eight populations distributed at altitudes ranging from 3400 m to 4300 m. Our genomic analysis revealed that Tibetan cattle exhibited a continuous phylogeographic cline from the East Asian taurine to the South Asian indicine ancestries. We found that recently selected genes in Tibetan cattle were related to body size (HMGA2 and NCAPG) and energy expenditure (DUOXA2). We identified signals of sympatric introgression from yak into Tibetan cattle at different altitudes, covering 0.64%–3.26% of their genomes, which included introgressed genes responsible for hypoxia response (EGLN1), cold adaptation (LRP11), DNA damage repair (LATS1), and UV radiation resistance (GNPAT). We observed that introgressed yak alleles were associated with noncoding variants, including those in present EGLN1. In Tibetan cattle, three yak introgressed SNPs in the EGLN1 promoter region reduced the expression of EGLN1, suggesting that these genomic variants enhance hypoxia tolerance. Taken together, our results indicated complex adaptation processes in Tibetan cattle, where recently selected genes and introgressed yak alleles jointly facilitated rapid adaptation to high-altitude environments.
  • Escaping from directing groups: Enantioselective C-C bond construction from unactivated olefins
    Item type: Other Journal Item
    Zhong, Hongyu; Morandi, Bill (2024)
    Science Bulletin
Publications 1 - 10 of 13