By decomposing the variations of daily mean variables into synoptic, intraseasonal, and low‐frequency components, the present study compares seasonal mean latent heat flux (LHF) anomalies related to the three components over the tropical Indo‐Pacific region during El Niño and La Niña years. It is found that the high‐frequency (intraseasonal and synoptic) LHF has an important contribution to total seasonal mean LHF anomalies over the tropical eastern Indo‐western Pacific region. Large seasonal mean LHF anomalies related to high‐frequency wind variations are identified in weak low‐frequency seasonal mean wind regions where high‐frequency LHF may accumulate over a season as it increases in both westerly and easterly phases of high‐frequency wind variations. In those regions, the LHF anomalies related to high‐frequency wind variations cancel part of the low‐frequency LHF anomalies, reducing total seasonal mean LHF anomalies. As El Niño–Southern Oscillation (ENSO)‐induced lower‐level wind anomaly region moves with the stage of ENSO, large seasonal mean LHF anomalies related to high‐frequency wind variations displace with the season. The intensity of high‐frequency wind fluctuations is also a factor influencing the seasonal mean LHF related to high‐frequency wind variations. Thus, the ENSO affects the high‐frequency LHF variations through modulating both the location of weak low‐frequency wind region and intensity of high‐frequency wind fluctuations.

中文翻译：

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厄尔尼诺和拉尼娜年的热带印度洋-西太平洋高频风相关季节性平均潜热通量变化

通过将日平均变量的变化分解为天气，季节内和低频分量，本研究比较了厄尔尼诺和拉尼娜期间热带印度太平洋区域与三个分量有关的季节性平均潜热通量（LHF）异常。年份。已经发现，高频（季节内和天气上）LHF对东部印度洋-西太平洋区域的总季节平均LHF异常有重要贡献。在弱的低频季节平均风区中发现了与高频风变化有关的大的季节平均LHF异常，在该区域中，高频LHF在高频风变化的西风和东风阶段都增加时可能会在一个季节内积累。在那些地区，与高频风变化有关的LHF异常抵消了部分低频LHF异常，从而减少了总的季节平均LHF异常。随着厄尔尼诺-南方涛动（ENSO）引起的低层风异常区域随着ENSO的阶段移动，与高频风变化有关的大型季节性平均LHF异常随季节发生位移。高频风波动的强度也是影响与高频风变化有关的季节性平均LHF的一个因素。因此，ENSO通过调制弱低频风区的位置和高频风波动强度来影响高频LHF的变化。随着厄尔尼诺-南方涛动（ENSO）引起的低层风异常区域随着ENSO的阶段移动，与高频风变化有关的大型季节性平均LHF异常随季节发生位移。高频风波动的强度也是影响与高频风变化有关的季节性平均LHF的一个因素。因此，ENSO通过调制弱低频风区的位置和高频风波动强度来影响高频LHF的变化。随着厄尔尼诺-南方涛动（ENSO）引起的低层风异常区域随着ENSO的阶段移动，与高频风变化有关的大型季节性平均LHF异常随季节发生位移。高频风波动的强度也是影响与高频风变化有关的季节性平均LHF的一个因素。因此，ENSO通过调制弱低频风区的位置和高频风波动强度来影响高频LHF的变化。