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首页> 外文期刊>Frontiers of earth science >Interannual variations in length of day and atmospheric angular momentum, and their seasonal associations with El Nio/Southern Oscillation-like sea surface temperature patterns
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Interannual variations in length of day and atmospheric angular momentum, and their seasonal associations with El Nio/Southern Oscillation-like sea surface temperature patterns

机译：日长和大气角动量的年际变化及其与厄尔尼诺/南方涛动的类似海表温度模式的季节性关联

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摘要

This study examines the seasonal connections between the interannual variations in LOD (length of day)/AAM(globe) (the relative atmospheric angular momentum for the whole globe) and the ENSO-like SST (El Nio/Southern Oscillation-like sea surface temperature) pattern and corresponding zonal and vertical circulations. Consistent with previous studies, the ENSO-like SST impact the following season LOD/AAM(globe), with the strongest correlations in DJF (December, January, and February), when it is likely to be the peak El Nio/La Nia period. Lag correlations between the interannual variations in LOD/AAM(globe) and surface temperature, and the interannual variations in LOD and both zonal circulation and vertical airflow around the equator, consistently indicate that the LOD/AAM(globe) reflect the potential impacts of variations in the Earth's rotation rate on the following season's sea surface temperatures (SST) over the tropical central and eastern Pacific (where the ENSO-like SST pattern is located). Moreover, the centers of strongest variation in the AAM(column) (the relative atmospheric angular momentum for an air column and the unit mass over a square meter) are located over the mid-latitudinal North Pacific in DJF and MAM (March, April, and May), and over the mid-latitudinal South Pacific in JJA (June, July, and August) and SON (September, October, and November). This suggests that the AAM(column) over the mid-latitudinal Pacific around 30A degrees N (30A degrees S) dominate the modulation of Earth's rotation rate, and then impact the variations in LOD during DJF and MAM (JJA and SON).
机译：这项研究研究了LOD（日长）/ AAM（地球）（整个地球的相对大气角动量）的年际变化与ENSO式SST（厄尔尼诺/南方涛动式海面温度）之间的季节联系。 ）模式以及相应的纬向和垂直环流。与先前的研究一致，类似ENSO的海表温度影响下一个季节的LOD / AAM（地球），而DJF（12月，1月和2月）的相关性最强，这可能是厄尔尼诺/拉尼雅高峰期。 。 LOD / AAM（地球）年际变化与地表温度之间的滞后关联以及LOD与赤道周围的纬向环流和垂直气流的年际变化始终表明LOD / AAM（地球）反映了变化的潜在影响热带中太平洋和东太平洋（类似ENSO的SST模式所在的区域）在接下来的季节的海表温度（SST）上的地球自转速率的变化。此外，AAM（列）中变化最大的中心（空气柱的相对大气角动量和单位质量超过一平方米）位于DJF和MAM的北太平洋中纬度（3月，4月，和5月），以及位于JJA（6月，7月和8月）和SON（9月，10月和11月）的中纬度南太平洋。这表明，纬向中纬度太平洋在北纬30度（南纬30度）附近的AAM（列）主导着地球自转速度的调制，然后影响DJF和MAM（JJA和SON）期间LOD的变化。

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  • 来源
    《Frontiers of earth science》 |2017年第4期|751-764|共14页
  • 作者

    Li Yuefeng; Xiao Ziniu; Shi Wenjing; Zhong Qi; Wang Qiguang; Li Huanlian;

  • 作者单位

    WMO Reg Training Ctr, China Meteorol Adm Training Ctr, Beijing 100081, Peoples R China;

    Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China;

    Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China;

    WMO Reg Training Ctr, China Meteorol Adm Training Ctr, Beijing 100081, Peoples R China;

    WMO Reg Training Ctr, China Meteorol Adm Training Ctr, Beijing 100081, Peoples R China;

    WMO Reg Training Ctr, China Meteorol Adm Training Ctr, Beijing 100081, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    four season features; interannual variation; length of day; atmospheric angular momentum; ENSO-like SST pattern;

    机译：四个季节特征;年际变化;日长;大气角动量;类ENSO海温模式;

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