page_title: Ice accretion indicator
hierarchical_section_title: Ice accretion indicator
context_page_description: The ice accretion indicator is an L-shaped piece of aluminium 38 cm long by 4 to 5 cm wide. It is used to indicate the formation of ice, frost or the presence of freezing rain or freezing drizzle.
  It is normally attached to a Stevenson screen, about 1 m above ground, but may be mounted in other areas away from any artificial heat sources. The weather station would have two on site and they would be exchanged after every weather observation. The spare indicator should always be at the outside air temperature to ensure that it is ready for use and would normally be stored inside the screen.
  If the observer notes the presence of ice or frost on the indicator then a remark to that effect should be sent in the next weather observation. Examples of these are 'rime icing on indicator' and 'FROIN'. As the indicator is at air temperature and is kept horizontal it provides an excellent surface on which to observe freezing precipitation.
context_section_description: The ice accretion indicator is an L-shaped piece of aluminium 38 cm (15 in) long by 4 to 5 cm (1.6 to 2.0 in) wide. It is used to indicate the formation of ice, frost or the presence of freezing rain or freezing drizzle.
  It is normally attached to a Stevenson screen, about 1 m (3 ft 3 in) above ground, but may be mounted in other areas away from any artificial heat sources. The weather station would have two on site and they would be exchanged after every weather observation. The spare indicator should always be at the outside air temperature to ensure that it is ready for use and would normally be stored inside the screen.
  If the observer notes the presence of ice or frost on the indicator then a remark to that effect should be sent in the next weather observation. Examples of these are 'rime icing on indicator' and 'FROIN' (frost on indicator). As the indicator is at air temperature and is kept horizontal it provides an excellent surface on which to observe freezing precipitation.
caption: Standard ice accretion indicator (upside down)
exif: {"Image Make": "EASTMAN KODAK COMPANY", "Image Model": "KODAK CX4200 DIGITAL CAMERA", "Image Orientation": "Horizontal (normal)", "Image XResolution": "230", "Image YResolution": "230", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Version 1.0100", "Image YCbCrPositioning": "Co-sited", "Image ExifOffset": "338", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail Orientation": "Horizontal (normal)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1780", "Thumbnail JPEGInterchangeFormatLength": "2732", "EXIF ExposureTime": "7743/250000", "EXIF FNumber": "9/2", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "140", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2005:07:27 03:12:35", "EXIF DateTimeDigitized": "2005:07:27 03:12:35", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "57/20", "EXIF ShutterSpeedValue": "501/100", "EXIF ApertureValue": "433/100", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "433/100", "EXIF MeteringMode": "CenterWeightedAverage", "EXIF Flash": "Flash fired", "EXIF FocalLength": "6", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "1632", "EXIF ExifImageLength": "1232", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "1750", "EXIF ExposureIndex": "140", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "0", "EXIF FocalLengthIn35mmFilm": "39", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "None", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "1"}