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Table 3. Diurnal variation and dependence on surface temperature and wind velocity of atmospheric electrical parameters.

From: Fair-weather atmospheric electricity study at Maitri (Antarctica)

Parameters

Diurnal Variation

Surface Temperature

Wind Speed

Maxwell Current Density

Diurnal variation with a maximum between 1800 and 2000 UT

Increases

Decreases

Potential Gradient

Diurnal variation with a maximum between 1800 and 2000 UT

Increases

Decreases

Air-Earth Current density

No diurnal variation

Slow decrease

no effect (Group 1

   

Decreases (Group 2

Small-Ion Concentration

No diurnal variation

Decreases

Increases (Group1)

   

Decreases (Group2)

Intermediate-Ion Concentration

Diurnal variation with a flat maximum between 800 and 1800 UT

Increases

Decreases

Large-Ion Concentration

No diurnal variation

Less dependence (Group1)

No Dependence (Group 1)

  

Decreases (Group2)

Decreases (Group2)