Rime ice

rimehard rimeSoft rimesofthardrime (frost)riming
Rime ice forms when supercooled water liquid droplets freeze onto surfaces.wikipedia
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Ice

water iceicyglacier ice
Hard rime is a white ice that forms when the water droplets in fog freeze to the outer surfaces of objects.
Soft rime contains a high proportion of trapped air, making it appear white rather than transparent, and giving it a density about one quarter of that of pure ice.

Fog

advection fogfreezing fogground fog
Hard rime is a white ice that forms when the water droplets in fog freeze to the outer surfaces of objects. It is often seen on trees atop mountains and ridges in winter, when low-hanging clouds cause freezing fog.
Freezing fog, which deposits rime, is composed of droplets of supercooled water that freeze to surfaces on contact.

Snow

snowfallsnow coverSnowfalls
Under some atmospheric conditions, forming and descending snow crystals may encounter and pass through atmospheric supercooled cloud droplets.
Snowflakes take on a variety of shapes, basic among these are platelets, needles, columns and rime.

Glaze (ice)

glaze iceglazeverglas
Glaze ice is similar in appearance to clear ice but it is the result of a completely different process, occurring during freezing rain or drizzle.

Graupel

Snow pelletssmall hailsoft hail
When this process continues so that the shape of the original snow crystal is no longer identifiable, the resulting crystal is referred to as graupel.
Graupel (Enɡlish: ), also called soft hail or snow pellets, is precipitation that forms when supercooled water droplets are collected and freeze on falling snowflakes, forming 2 - 5 mm balls of rime.

Clear ice

Hard rime formations are difficult to shake off; they have a comb-like appearance, unlike soft rime, which looks feathery or spiky, or clear ice, which looks homogeneous and transparent.
Clear ice is denser and more homogeneous than hard rime; like rime, however, clear ice accumulates on branches and overhead lines, where it is particularly dangerous due to its relatively high density.

Anemometer

anemometerswind gaugeHot-wire anemometry
Scientists at meteorologically extreme places such as Mount Washington in New Hampshire often have to break huge chunks of hard rime off weather equipment, in order to keep anemometers and other measuring instruments operating.
Additionally, the tube is heated to prevent rime ice formation on the tube.

Freezing rain

icesleetfrozen rain
Glaze ice is similar in appearance to clear ice but it is the result of a completely different process, occurring during freezing rain or drizzle.

Freezing drizzle

drizzleFZDZ
Glaze ice is similar in appearance to clear ice but it is the result of a completely different process, occurring during freezing rain or drizzle.

Water

H 2 OHOliquid water
Hard rime is a white ice that forms when the water droplets in fog freeze to the outer surfaces of objects.

Drop (liquid)

dropletdropletsdrop
Hard rime is a white ice that forms when the water droplets in fog freeze to the outer surfaces of objects.

Freezing

solidificationfrozenfreeze
Hard rime is a white ice that forms when the water droplets in fog freeze to the outer surfaces of objects.

Tree

treessaplingarboreal
It is often seen on trees atop mountains and ridges in winter, when low-hanging clouds cause freezing fog.

Mountain

mountainsmountainouspeak
It is often seen on trees atop mountains and ridges in winter, when low-hanging clouds cause freezing fog.

Ridge

ridgesmountain ridgehill ridge
It is often seen on trees atop mountains and ridges in winter, when low-hanging clouds cause freezing fog.

Cloud

cloudscloud formationcloudy
It is often seen on trees atop mountains and ridges in winter, when low-hanging clouds cause freezing fog.

Windward and leeward

leewardwindwardlee
This fog freezes to the windward (wind-facing) side of tree branches, buildings, or any other solid objects, usually with high wind velocities and air temperatures between −2 and −8 °C.

Wind

windsgustsgust
This fog freezes to the windward (wind-facing) side of tree branches, buildings, or any other solid objects, usually with high wind velocities and air temperatures between −2 and −8 °C.

Mount Washington (New Hampshire)

Mount WashingtonMt. WashingtonMount Washington, New Hampshire
Scientists at meteorologically extreme places such as Mount Washington in New Hampshire often have to break huge chunks of hard rime off weather equipment, in order to keep anemometers and other measuring instruments operating.

New Hampshire

NHState of New HampshireNew Hampshire, U.S.
Scientists at meteorologically extreme places such as Mount Washington in New Hampshire often have to break huge chunks of hard rime off weather equipment, in order to keep anemometers and other measuring instruments operating.

Microscope

microscopesmicroscopicmicroscopically
The frozen droplets on the surface of rimed crystals are hard to resolve and the topography of a graupel particle is not easy to record with a visible-wavelength microscope because of the limited resolution and depth of field in the instrument.

Scanning electron microscope

scanning electron microscopySEMScanning electron micrograph
However, observations of snow crystals with a low-temperature scanning electron microscope (LT-SEM) clearly show cloud droplets measuring up to 50 μm on the surface of the crystals.