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El Niño effects on earth rotation parameters from LAGEOS and LARES orbital analysis

机译:厄尔尼诺现象对LAGEOS和LARES轨道分析的地球自转参数的影响

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摘要

Earth rotation, besides external actions due to other bodies in the solar system, is influenced by internal mass redistributions, including its atmospheric and water envelope. EI Nifio-Southern Oscillation (ENSO) is one such event characterized by sea level change in the eastern part of the Pacific Ocean due to an increase of the temperature by about 2°C. ENSO is manifested with irreguIar periodicity and with different strength. SateIIite Laser Ranging (SLR) to orbiting satellites such as LAGEOS and LARES in conjunction with the other geodedic techniques, such as GNSS and Very Long Baseline Interferometry (VLBI), allow very accurate determination of the center of mass and rotation vector of the Earth. The paper will report on the experimental vaIues of the Earth orientation parameters and in particuIar of the center of mass and the Iength of the day with particuIar reference to signatures due to last ENSO event ended in 2016.
机译:地球自转,除了由于太阳系中其他物体引起的外部作用外,还受内部质量重新分布的影响,包括大气层和水域。 EI Nifio-南方涛动(ENSO)是这样的事件之一,其特征是由于温度升高约2°C,导致太平洋东部海平面发生变化。 ENSO具有不规则的周期性和不同的强度。 SateIIite激光测距(SLR)结合LAGEOS和LARES等轨道卫星与其他大地测量技术(例如GNSS和超长基线干涉测量法(VLBI))一起,可以非常精确地确定地球的质心和旋转矢量。该论文将报告地球定向参数的实验值,特别是质心和一天的强度,并特别提及由于上一次ENSO事件于2016年结束而引起的签名。

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