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Eddy heat and salt transport in four typical regions in the Bay of Bengal

PERERA Lasitha CHEN Gengxin GAMAGE Tilak WANG Dongxiao

PERERALasitha, 陈更新, GAMAGETilak, 王东晓. 孟加拉湾4个典型地区的涡旋热和盐输送[J]. 华东师范大学学报(自然科学版), 2020, (S1): 125-129. doi: 10.3969/j.issn.1000-5641.202092224
引用本文: PERERALasitha, 陈更新, GAMAGETilak, 王东晓. 孟加拉湾4个典型地区的涡旋热和盐输送[J]. 华东师范大学学报(自然科学版), 2020, (S1): 125-129. doi: 10.3969/j.issn.1000-5641.202092224
PERERA Lasitha, CHEN Gengxin, GAMAGE Tilak, WANG Dongxiao. Eddy heat and salt transport in four typical regions in the Bay of Bengal[J]. Journal of East China Normal University (Natural Sciences), 2020, (S1): 125-129. doi: 10.3969/j.issn.1000-5641.202092224
Citation: PERERA Lasitha, CHEN Gengxin, GAMAGE Tilak, WANG Dongxiao. Eddy heat and salt transport in four typical regions in the Bay of Bengal[J]. Journal of East China Normal University (Natural Sciences), 2020, (S1): 125-129. doi: 10.3969/j.issn.1000-5641.202092224

孟加拉湾4个典型地区的涡旋热和盐输送

doi: 10.3969/j.issn.1000-5641.202092224
详细信息
  • 中图分类号: P724

Eddy heat and salt transport in four typical regions in the Bay of Bengal

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  • 摘要: 利用涡扩散法、海面高度资料和气候水文资料, 对孟加拉湾海域海盆尺度涡(湍流)致热盐输运进行了估算. 结果发现, 在孟加拉湾大量的涡致输运主要存在于4个区域: 孟加拉湾北部的西部边界(NB)、孟加拉湾西部(WB)、斯里兰卡南部和东部(SWB)以及孟加拉湾东南部靠近马六甲海峡区域(SEB). 根据涡输运的气候态分布, 涡致热输运主要存在于NB和SWB海域, 而涡致盐输运主要存在于NB、SWB和SEB海域. 基于季节平均的涡致输运估计, NB和SWB海域涡致热输运较为显著的季节为初夏和夏季季风季节, 而在WB和SEB海域为后夏季风季节. 此外, 季节性涡流动能(EKE)调制通过季节性强化的东印度洋沿岸流(EICC)和西南/东北季风电流(SMC/NMC), 被确定为影响季节性涡流的主要因素之一, 在 NB、WB 和 SWB 区域分别进行运输.
  • Fig.  1  Spatial distribution of mean eddy heat (106 W/m) and salt transport (kg/ms) in the BOB averaged over the period from 2005 to 2012 a) Meridional component, b) zonal component, and c) magnitude of eddy heat transport (shading) along with the respective direction (arrows); e)-f) are the same as a)-c) but for eddy salt transport

    Fig.  2  a)-(d) Seasonal climatology of surface geostrophic currents (ms–1; vectors) and seasonal mean surface EKE (m–2s–2; shading); e) monthly mean surface EKE for the four regions NB, WB, SWB, and SEB (see Figure 1)

    Tab.  1  Seasonal values of spatial mean eddy heat and salt transport for four sub-regions NB, WB, SWB and SEB

    Sub-regions Winter Monsoon Pre-summer Monsoon Summer Monsoon Post-summer Monsoon
    106· W·m–1 kg/ms 106· W·m–1 kg/ms 106· W·m–1 kg/ms 106 W·m–1 kg/ms
    NB 5.73 11.11 18.94 23.25 8.66 10.11 8.00 14.14
    WB 7.82 11.73 7.28 11.88 7.35 6.95 19.31 15.30
    SWB 8.87 16.27 4.34 6.86 16.80 9.87 10.58 12.43
    SEB 5.31 17.24 6.91 13.31 3.88 10.36 9.22 14.93
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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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