Chen Lei

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Chen
First Name
Lei
ORCID
0000-0002-6873-2692

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  • Article
    The Earth BioGenome Project 2020: starting the clock
    (National Academy of Sciences, 2022-01-18) Lewin, Harris A. ; Richards, Stephen ; Miguel L. Allende ; Lieberman Aiden, Erez ; Archibald, John M. ; Bálint, Miklós ; Barker, Katharine B. ; Baumgartner, Bridget ; Belov, Katherine ; Bertorelle, Giorgio ; Blaxter, Mark ; Cai, Jing ; Caperello, Nicolette D. ; Carlson, Keith ; Castilla-Rubio, Juan Carlos ; Chaw, Shu-Miaw ; Chen, Lei ; Childers, Anna K. ; Coddington, Jonathan ; Conde, Dalia A. ; Corominas, Montserrat ; Crandall, Keith A. ; Crawford, Andrew J. ; DiPalma, Federica ; Durbin, Richard ; Ebenezer, ThankGod E. ; Edwards, Scott V. ; Fedrigo, Olivier ; Flicek, Paul ; Formenti, Giulio ; Gibbs, Richard A. ; Gilbert, M. Thomas P. ; Goldstein, Melissa M. ; Graves, Jennifer Marshall ; Greely, Henry T. ; Grigoriev, Igor V. ; Hackett, Kevin J. ; Hall, Neil ; Haussler, David ; Helgen, Kristofer M. ; Hogg, Carolyn J. ; Isobe, Sachiko ; Jakobsen, Kjetill S. ; Janke, Axel ; Jarvis, Erich ; Johnson, Warren E. ; Jones, Steven J. M. ; Karlsson, Elinor K. ; Kersey, Paul J. ; Kim, Jin-Hyoung ; Kress, W. John ; Kuraku, Shigehiro ; Lawniczak, Mara K. N. ; Leebens-Mack, James H. ; Li, Xueyan ; Lindblad-Toh, Kerstin ; Liu, Xin ; Lopez, Jose V. ; Marques-Bonet, Tomas ; Mazard, Sophie ; Mazet, Jonna A. K. ; Mazzoni, Camila J. ; Myers, Eugene ; O’Neill, Rachel J. ; Paez, Sadye ; Park, Hyun ; Robinson, Gene E. ; Roquet, Cristina ; Ryder, Oliver A. ; Sabir, Jamal S. M. ; Shaffer, H. Bradley ; Shank, Timothy M. ; Sherkow, Jacob S. ; Soltis, Pamela S. ; Tang, Boping ; Tedersoo, Leho ; Uliano-Silva, Marcela ; Wang, Kun ; Wei, Xiaofeng ; Wetzer, Regina ; Wilson, Julia L. ; Xu, Xun ; Yang, Huanming ; Yoder, Anne D. ; Zhang, Guojie
    November 2020 marked 2 y since the launch of the Earth BioGenome Project (EBP), which aims to sequence all known eukaryotic species in a 10-y timeframe. Since then, significant progress has been made across all aspects of the EBP roadmap, as outlined in the 2018 article describing the project’s goals, strategies, and challenges (1). The launch phase has ended and the clock has started on reaching the EBP’s major milestones. This Special Feature explores the many facets of the EBP, including a review of progress, a description of major scientific goals, exemplar projects, ethical legal and social issues, and applications of biodiversity genomics. In this Introduction, we summarize the current status of the EBP, held virtually October 5 to 9, 2020, including recent updates through February 2021. References to the nine Perspective articles included in this Special Feature are cited to guide the reader toward deeper understanding of the goals and challenges facing the EBP.
  • Article
    Modeling the dispersion of dissolved natural gas condensates from the Sanchi incident
    (American Geophysical Union, 2019-11-11) Chen, Lei ; Yang, Jiayan ; Wu, Lixin
    An Iranian tanker with 136,000 tons of natural gas condensates collided with a freighter in the East China Sea in January 2018 and, after drifting ablaze for 8 days and over 200 km, capsized on the edge of the shelf near the Kuroshio Current. Different from the crude oil, the condensates consist of hydrocarbons that have relatively high solubility in seawater. We postulate that the leakage from the remaining condensate cargo at 110 m depth may result in a bottom layer of condensate‐enriched water in the vicinity of the resting tanker. A model is constructed in this study to simulate the dispersion of contaminated water through the processes of oceanic advection, diffusion, biodegradation, and volatilization. It is found that the scope and magnitude of the dispersion are most sensitive to the biodegradation. Even though the biodegradation time scale depends on several factors that are not well quantified in this region, using any value within the estimated range from a previous study results in significant contamination in the broad area. The dispersion is particularly effective in this incident because the tanker capsized near the Kuroshio Current—a fast‐moving western boundary current. The Kuroshio acts as a fast conduit to spread the contaminant to the east coast of Japan and the interior Pacific Ocean. In addition, we identify that the Tsushima Warm Current, a perennial flow into the Japan Sea, is the second major conduit for spreading the polluted water. This study indicates that dissolved hydrocarbons are the main environmental risk for maritime spills of natural gas condensates.
  • Article
    Topography effects on the seasonal variability of ocean bottom pressure in the North Pacific Ocean
    (American Meteorological Society, 2023-03-01) Chen, Lei ; Yang, Jiayan ; Wu, Lixin
    Ocean bottom pressure p B is an important oceanic variable that is dynamically related to the abyssal ocean circulation through geostrophy. In this study we examine the seasonal p B variability in the North Pacific Ocean by analyzing satellite gravimetric observations from the GRACE program and a data-assimilated ocean-state estimate from ECCOv4. The seasonal p B variability is characterized by alternations of low and high anomalies among three regions, the subpolar and subtropical basins as well as the equatorial region. A linear two-layer wind-driven model is used to examine forcing mechanisms and topographic effects on seasonal p B variations. The model control run, which uses a realistic topography, is able to simulate a basinwide seasonal p B variability that is remarkably similar to that from GRACE and ECCOv4. Since the model is driven by wind stress alone, the good model–data agreement indicates that wind stress is the leading forcing for seasonal changes in p B . An additional model simulation was conducted by setting the water depth uniformly at 5000 m. The magnitude of seasonal p B anomaly is amplified significantly in the flat-bottom simulation as compared with that in the control run. The difference can be explained in terms of the topographic Sverdrup balance. In addition, the spatial pattern of the seasonal p B variability is also profoundly affected by topography especially on continental margins, ridges, and trenches. Such differences are due to topographic effects on the propagation pathways of Rossby waves.
  • Article
    Wind-driven seasonal variability of deep-water overflow from the Pacific Ocean to the South China Sea
    (American Geophysical Union, 2024-05-26) Chen, Lei ; Yang, Jiayan ; Wu, Lixin ; Lin, Xiaopei
    The South China Sea (SCS) is a semi-enclosed marginal sea linked to the broader oceans via various geographically constrained channels. Beneath the main thermocline depth, Luzon Strait is the only conduit for water-mass exchanges. Observations indicate a substantial seasonal variability in the inflow transport of deep water from the Pacific Ocean. This study aims to identify and examine key drivers for such seasonal changes. It is found that seasonal variability of the deep-water transport into the SCS is primarily driven by surface wind stress. An imbalance in wind-driven exchanges of surface water between the SCS and external seas demands compensational transports in subsurface layers so that the net volume transport into the SCS is conserved, resulting in seasonal variations in deep-water overflow. Changes in Karimata Strait exert a particularly influential impact on deep-water inflow, likely due to its unique position as the sole connecting channel across the Equator.