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Historical overview of hypoxia in the Bay of Bengal

HOSSAIN Md Jaker SHEIKH Aftab Uddin ZHANG Jing

HOSSAINMd Jaker, SHEIKHAftab Uddin, 张经. 孟加拉湾低氧区历史概述[J]. 华东师范大学学报(自然科学版), 2020, (S1): 109-113. doi: 10.3969/j.issn.1000-5641.202092218
引用本文: HOSSAINMd Jaker, SHEIKHAftab Uddin, 张经. 孟加拉湾低氧区历史概述[J]. 华东师范大学学报(自然科学版), 2020, (S1): 109-113. doi: 10.3969/j.issn.1000-5641.202092218
HOSSAIN Md Jaker, SHEIKH Aftab Uddin, ZHANG Jing. Historical overview of hypoxia in the Bay of Bengal[J]. Journal of East China Normal University (Natural Sciences), 2020, (S1): 109-113. doi: 10.3969/j.issn.1000-5641.202092218
Citation: HOSSAIN Md Jaker, SHEIKH Aftab Uddin, ZHANG Jing. Historical overview of hypoxia in the Bay of Bengal[J]. Journal of East China Normal University (Natural Sciences), 2020, (S1): 109-113. doi: 10.3969/j.issn.1000-5641.202092218

孟加拉湾低氧区历史概述

doi: 10.3969/j.issn.1000-5641.202092218
详细信息
  • 中图分类号: P734

Historical overview of hypoxia in the Bay of Bengal

  • 摘要: 世界沿海地区快速的经济发展和人口的增加, 以及农业和渔业生产的增加, 给沿海生态系统带来了巨大的环境压力. 环境压力的最主要症状是缺氧, 这是指低氧或贫氧(≤ 2 mg/L)的区域, 动物可能会窒息而死. 本研究旨在通过之前有效相关的文献并利用NOAA的世界大洋图集数据, 认知从20世纪70年代至2018年期间孟加拉湾低氧区历史概观. 除2018年, 至20世纪70年代以来, 孟加拉湾氧气浓度在一定程度上保持稳定, 在水深100 m (≤ 1.6 mg/L) 区域低氧区长期存在. 由于孟加拉湾在2013—2018年期间发生了一些热带气旋, 2018年地表和地下水中的氧气浓度突然增加. 次表层水中溶解氧含量的上升主要是由于剧烈的垂向混合、下沉流和上升流. 风暴导致的上升流会导致溶解氧含量的下降. 相比起中层水(100~500 m)中耗竭的氧浓度, 在水深0~100 m 和1000 m的区域氧浓度是较高的. 然而, 由于各种临近河流的大量淡水输入以及高降雨量, 孟加拉湾水体层化现象显著. 结合相关物理过程, 这种垂向水体分层控制了表层和次表层水的输运和垂向交换, 加剧了低氧区的形成, 进而影响此区域内浮游植物和水生生物的生长.
  • Fig.  1  Trends in annual average concentration of DO at a depth of 0~1000 m in the BoB (8 ~ 20°N, 80 ~ 100°E)

    Note: 1976 data were adapted from Naqvi et al [7] and other data were derived from NOAA World Ocean Atlas

    Fig.  2  Salinity (‰) (left) and dissolved oxygen (mg/L) (right) at the sediment-water interface in the western BoB

    Note: Source from Suokhrie et al [10]

    Tab.  1  Summary of previously reported hypoxia (O2 ≤ 2 mg/L) and OMZ (O2 ≤ 0.7 mg/L) and their proximity within the BoB

    Area in BoBHypoxic depth/mYearObserved OMZ/mReferences
    8~20°N, 80~100°E90 ~ 2001893—2004200 ~ 490[9]
    West and Central90 ~ 1051906—1990105 ~ 580[7-8]
    6~12°N, 80~98°E100 ~ 2001994—2001200 ~ 800[10]
    Central (11~15°N)100 ~ 1202001—2003120 ~ 600[11]
    Note: Source from Satpathy et al [8]
    下载: 导出CSV
  • [1] DIAZ R J, ROSENBERG R. Spreading dead zones and consequences for marine ecosystems [J]. Science, 2008, 321(5891): 926-929.
    [2] BYERS J E. Differential susceptibility to hypoxia aids estuarine invasion [J]. Marine Ecology Progress Series, 2000, 203: 123-132.
    [3] RAO C K, NAQVI S W A, KUMAR M D, et al. Hydrochemistry of the Bay of Bengal: Possible reasons for a different water-column cycling of carbon and nitrogen from the Arabian Sea [J]. Marine Chemistry, 1994, 47(3/4): 279-290.
    [4] SHAMSAD M, FARUKH M A, CHOWDHURY M J R, et al. Sea Surface Temperature Anomaly in the Bay of Bengal in 2010 [J]. Journal of Environmental Science and Natural Resources, 2012, 5(2): 77-80.
    [5] FERNANDES L, BHOSLE N B, MATONDKAR S P, et al. Seasonal and spatial distribution of particulate organic matter in the Bay of Bengal [J]. Journal of Marine Systems, 2009, 77(1/2): 137-147.
    [6] SOURAV D, ABHRA C, SANDIP G, et al. Characterizing the influence of tide on the physico-chemical parameters and nutrient variability in the coastal surface water of the northern Bay of Bengal during the winter season [J]. Acta Oceanologica Sinica, 2015, 34(12): 102-111.
    [7] NAQVI S W A, DESOUSA S N, FONDEKAR S P, et al. Distribution of dissolved oxygen in the western Bay of Bengal [J]. Mahasagar, 1979, 12(1): 25-34.
    [8] SATPATHY K K, PANIGRAHI S, MOHANTY A K, et al. Severe oxygen depletion in the shallow regions of the Bay of Bengal off Tamil Nadu Coast [J]. Current Science, 2013, 104(11): 1467-1469.
    [9] PAULMIER A, RUIZ-PINO D. Oxygen minimum zones (OMZs) in the modern ocean [J]. Progress in Oceanography, 2009, 80(3/4): 113-128.
    [10] SUOKHRIE T, SAALIM S M, SARASWAT R, et al. Indian monsoon variability in the last 2000 years as inferred from benthic foraminifera [J]. Quaternary International, 2018, 479: 128-140.
    [11] SARDESSAI S, RAMAIAH N, PRASANNA KUMAR S, et al. Influence of environmental forcing on the seasonality of dissolved oxygen and nutrients in the Bay of Bengal [J]. Journal of Marine Research, 2007, 65(2): 301-316.
    [12] MADHU N V, MAHESWARAN P A, JYOTHIBABU R, et al. Enhanced biological production off Chennai triggered by October 1999 super cyclone (Orissa) [J]. Current Science, 2002, 82(12): 1472-1479.
    [13] PAVELA J S, ROSS J L, CHITTENDEN J M E. Sharp reductions in abundance of fishes and benthic macroinvertebrates in the Gulf of Mexico off Texas associated with hypoxia [J]. Gulf of Mexico Science, 1983, 6(2): 11.
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出版历程
  • 收稿日期:  2020-04-21
  • 网络出版日期:  2021-01-27
  • 刊出日期:  2021-01-27

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