Longitudinal rolls

{
  "id": "MLC-T-MET-007034",
  "term": "Longitudinal rolls",
  "field": "Meteorology and atmospheric science",
  "definition": "Organized, helical circulations in the atmospheric boundary layer, aligned approximately parallel to the mean wind direction. These rolls consist of alternating bands of rising and sinking air, which can be visualized by cloud streets or parallel streaks of dust. They form under conditions of moderate wind shear and sufficient thermal instability.",
  "synonyms": [
    "rolls",
    "roll vortices",
    "organized large eddies"
  ],
  "see_also": [
    "coherent structures",
    "Langmuir circulation",
    "horizontal convective rolls"
  ],
  "url": "https://mlchart.com/terminology/meteorology/longitudinal-rolls/"
}