Empirical evidence for multidecadal scale global atmospheric electric circuit modulation by the El Niño-Southern Oscillation

Empirical evidence for multidecadal scale global atmospheric electric circuit modulation by the El Niño-Southern Oscillation
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厄尔尼诺南方涛动对数十年尺度全球大气电路调制的经验证据

DOI:
10.1088/1748-9326/aca68c
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发表时间:
2022
影响因子:
6.7
通讯作者:
Harrison R
Harrison R
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Harrison R

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厄尔尼诺-南方涛动(ENSO)改变了全球的降水模式。扰动天气和雷暴中的电荷分离驱动着全球大气电路(GEC),因此ENSO引起的降水变化预计会影响全球电路。通过使用基于卡内基曲线的新数据处理程序分析历史大气电数据,揭示了与ENSO海表温度(SST)异常相关的信号。这些结果表明,在20世纪的大部分时间里,ENSO与GEC之间存在着持续的关系,这些数据来自勒威克,设得兰群岛和Watheroo,W。澳大利亚恢复的数据向UTC日的前半部分加权,给出太平洋Nino 3.4和Nino 4区域SST异常的GEC灵敏度高达0.5%~ 0.1C − 1。通过电子手段传输ENSO变率代表了一种未探索的遥相关,例如,通过拟议的GEC对层状云微物理学的影响。ENSO-GEC的强关系也为历史大气电数据提供了质量检验,并鼓励使用它们来减少SST重建的不确定性。
The El Nino-Southern Oscillation (ENSO) modifies precipitation patterns across the planet. Charge separation in disturbed weather and thunderstorms drives the global atmospheric electric circuit (GEC), hence ENSO-induced precipitation changes are anticipated to affect the global circuit. By analysing historical atmospheric electricity data using a new data processing procedure based on the Carnegie curve, signals correlated with ENSO sea surface temperature (SST) anomalies are revealed. These demonstrate a persistent ENSO-GEC relationship for the majority of the twentieth century, in potential gradient data from Lerwick, Shetland and Watheroo, W. Australia. The recovered data is weighted towards the first half of the UTC day, giving a GEC sensitivity up to∼ 5%◦ C− 1 of SST anomaly in the Nino 3.4 and 4 regions of the Pacific Ocean. Transferring ENSO variability by electrical means represents an unexplored teleconnection, for example, through proposed GEC effects on stratiform cloud microphysics. The strong ENSO-GEC relationship also provides a quality test for historical atmospheric electricity data, and encourages their use in reducing SST reconstruction uncertainties.
DOI: 10.1029/te048i001p00049
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