Supply current

{
  "id": "MLC-T-MET-009423",
  "term": "Supply current",
  "field": "Meteorology and atmospheric science",
  "definition": "The upward or downward vertical flow of electric charge within a thunderstorm that maintains the electrical dipole or tripole structure of the cloud. Updrafts and downdrafts transport charged precipitation particles and ions, creating a separation of charge that generates the storm's electric field. This continuous transport of charge effectively acts as a non-electrical generator, counteracting the electrical discharge from lightning and corona currents.",
  "see_also": [
    "air-earth conduction current",
    "point discharge current"
  ],
  "url": "https://mlchart.com/terminology/meteorology/supply-current/"
}