View allAll Photos Tagged frostbeard
Haareis entsteht unter bestimmten meteorologischen Bedingungen auf liegendem Totholz im Wald. Nur bei Frost und ohne Schneelage bilden sich die hauchdünnen Eisfäden. Man bezeichnet die Erscheinung auch als "Eiswolle".
12 februari 2022
Hair ice, also called ice wool or frost beard, is a rare natural phenomenon in which a hair-like, woolly ice structure develops on dead and wet heartwood, not on the bark, of deciduous trees.
Hair ice can form when the air temperature is slightly below freezing. Fungi occur in the wood and the metabolism of these fungi, among other things, releases water that is forced out through very small openings in the wood. The water squeezed out freezes into a hair-like structure. High humidity is necessary for the successful formation of hair ice so that the water squeezed out cannot evaporate and remains available for freezing. As long as the fungi continue to produce water and the climatic conditions remain favorable, hair ice can continue to grow. If the air temperature becomes too low, the metabolism of the fungi drops to such a low level that insufficient water is produced.
Hair ice is very delicate and melts immediately upon contact. If hair ice is exposed to sunlight, it will quickly sublimate and disappear. Hair ice can therefore be found early in the morning or only in shady places.
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IJshaar, ook wel haarijs of sneeuwbaard, is een zeldzaam natuurlijk verschijnsel waarbij een haarachtige, wollige ijsstructuur ontstaat op dood en nat kernhout, dus niet op de bast, van loofbomen.
IJshaar kan ontstaan als de luchttemperatuur even onder het vriespunt ligt. In het hout komen schimmels voor en bij de stofwisseling van deze schimmels komt onder andere water vrij dat door zeer kleine openingen in het hout (houtstralen) naar buiten wordt geperst. Het naar buiten geperste water bevriest tot een haarachtige structuur. Een hoge luchtvochtigheid is noodzakelijk voor de succesvolle vorming van ijshaar zodat het naar buiten geperste water niet kan verdampen en voor bevriezing beschikbaar blijft. Zolang de schimmels water blijven produceren en de klimatologische omstandigheden gunstig blijven, kan ijshaar aan blijven groeien. Als de luchttemperatuur te laag wordt, daalt de stofwisseling van de schimmels tot zo'n laag niveau dat er onvoldoende water geproduceerd wordt.
IJshaar is zeer teer en smelt na aanraking direct weg. Als ijshaar aan zonlicht wordt blootgesteld, zal het snel sublimeren en verdwijnen. IJshaar is daarom 's morgens vroeg of alleen op schaduwrijke plaatsen te vinden.
12 februari 2022
Hair ice, also called ice wool or frost beard, is a rare natural phenomenon in which a hair-like, woolly ice structure develops on dead and wet heartwood, not on the bark, of deciduous trees.
Hair ice can form when the air temperature is slightly below freezing. Fungi occur in the wood and the metabolism of these fungi, among other things, releases water that is forced out through very small openings in the wood. The water squeezed out freezes into a hair-like structure. High humidity is necessary for the successful formation of hair ice so that the water squeezed out cannot evaporate and remains available for freezing. As long as the fungi continue to produce water and the climatic conditions remain favorable, hair ice can continue to grow. If the air temperature becomes too low, the metabolism of the fungi drops to such a low level that insufficient water is produced.
Hair ice is very delicate and melts immediately upon contact. If hair ice is exposed to sunlight, it will quickly sublimate and disappear. Hair ice can therefore be found early in the morning or only in shady places.
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IJshaar, ook wel haarijs of sneeuwbaard, is een zeldzaam natuurlijk verschijnsel waarbij een haarachtige, wollige ijsstructuur ontstaat op dood en nat kernhout, dus niet op de bast, van loofbomen.
IJshaar kan ontstaan als de luchttemperatuur even onder het vriespunt ligt. In het hout komen schimmels voor en bij de stofwisseling van deze schimmels komt onder andere water vrij dat door zeer kleine openingen in het hout (houtstralen) naar buiten wordt geperst. Het naar buiten geperste water bevriest tot een haarachtige structuur. Een hoge luchtvochtigheid is noodzakelijk voor de succesvolle vorming van ijshaar zodat het naar buiten geperste water niet kan verdampen en voor bevriezing beschikbaar blijft. Zolang de schimmels water blijven produceren en de klimatologische omstandigheden gunstig blijven, kan ijshaar aan blijven groeien. Als de luchttemperatuur te laag wordt, daalt de stofwisseling van de schimmels tot zo'n laag niveau dat er onvoldoende water geproduceerd wordt.
IJshaar is zeer teer en smelt na aanraking direct weg. Als ijshaar aan zonlicht wordt blootgesteld, zal het snel sublimeren en verdwijnen. IJshaar is daarom 's morgens vroeg of alleen op schaduwrijke plaatsen te vinden.
Hair ice, also known as ice wool or frost beard, is a type of ice that forms on dead wood and takes the shape of fine, silky hair. It is somewhat uncommon, and has been reported mostly at latitudes between 45 and 55 °N in broadleaf forests.
My youngest son asked me if that was what St Nicolas beard was made of. In some mixed forests, hair ice forms on rotten wood when a period of rain is followed by a period of ice, but only if the fungus Exidiopsis effusa is present in the forest.
I saw an item about hair ice on Winter Watch last week, I knew I had seen and photographed the phenomenon some years ago but had no idea what a rare occurrence it was. Also known as ice wool or frost beard it generally occurs in deciduous forests between 45 and 55 degrees north, this particular specimen was found near Dunkeld in Perthshire, Scotland. Of no particular photographic merit but shared here for general interest.
More about hair ice here en.wikipedia.org/wiki/Hair_ice
If I'd known this morning that I'd find lots and lots of hair ice today getting up early would have been much easier :-)
According to Wikipedia "hair ice, also known as ice wool or frost beard, is a type of ice that forms on dead wood and takes the shape of fine, silky hair. It is somewhat uncommon, and has been reported mostly at latitudes between 45–55 °N in broadleaf forests. (...)
Hair ice forms on moist, rotting wood from broadleaf trees when temperatures are slightly under 0 °C (32 °F) and the air is humid. (...) The hairs are brittle, but take the shape of curls and waves. They can maintain their shape for hours and sometimes days. This long lifetime indicates that something is preventing the small ice crystals from recrystallizing into larger ones, since recrystallization normally occurs very quickly at temperatures near 0 °C (32 °F).
In the year 2015, German and Swiss scientists identified the fungus Exidiopsis effusa as key to the formation of hair ice. (...)The fungus shapes the ice into fine hairs through an uncertain mechanism and likely stabilizes it by providing a recrystallization inhibitor similar to antifreeze proteins."
12 februari 2022
Hair ice, also called ice wool or frost beard, is a rare natural phenomenon in which a hair-like, woolly ice structure develops on dead and wet heartwood, not on the bark, of deciduous trees.
Hair ice can form when the air temperature is slightly below freezing. Fungi occur in the wood and the metabolism of these fungi, among other things, releases water that is forced out through very small openings in the wood. The water squeezed out freezes into a hair-like structure. High humidity is necessary for the successful formation of hair ice so that the water squeezed out cannot evaporate and remains available for freezing. As long as the fungi continue to produce water and the climatic conditions remain favorable, hair ice can continue to grow. If the air temperature becomes too low, the metabolism of the fungi drops to such a low level that insufficient water is produced.
Hair ice is very delicate and melts immediately upon contact. If hair ice is exposed to sunlight, it will quickly sublimate and disappear. Hair ice can therefore be found early in the morning or only in shady places.
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IJshaar, ook wel haarijs of sneeuwbaard, is een zeldzaam natuurlijk verschijnsel waarbij een haarachtige, wollige ijsstructuur ontstaat op dood en nat kernhout, dus niet op de bast, van loofbomen.
IJshaar kan ontstaan als de luchttemperatuur even onder het vriespunt ligt. In het hout komen schimmels voor en bij de stofwisseling van deze schimmels komt onder andere water vrij dat door zeer kleine openingen in het hout (houtstralen) naar buiten wordt geperst. Het naar buiten geperste water bevriest tot een haarachtige structuur. Een hoge luchtvochtigheid is noodzakelijk voor de succesvolle vorming van ijshaar zodat het naar buiten geperste water niet kan verdampen en voor bevriezing beschikbaar blijft. Zolang de schimmels water blijven produceren en de klimatologische omstandigheden gunstig blijven, kan ijshaar aan blijven groeien. Als de luchttemperatuur te laag wordt, daalt de stofwisseling van de schimmels tot zo'n laag niveau dat er onvoldoende water geproduceerd wordt.
IJshaar is zeer teer en smelt na aanraking direct weg. Als ijshaar aan zonlicht wordt blootgesteld, zal het snel sublimeren en verdwijnen. IJshaar is daarom 's morgens vroeg of alleen op schaduwrijke plaatsen te vinden.
Haareis entsteht unter bestimmten meteorologischen Bedingungen auf liegendem Totholz im Wald. Nur bei Frost und ohne Schneelage bilden sich die hauchdünnen Eisfäden. Man bezeichnet die Erscheinung auch als "Eiswolle".
Hair ice forms on damp, decaying wood of deciduous trees when temperatures are slightly below 0 °C (32 °F) and the air is moist. Generally, when a cold period follows a rainy period. Each of the smooth, silky hairs has a diameter of about 0.02 mm and a length of up to 20 cm. Evidence shows that the fungus Exidiopsis effusa is also necessary for the ice to form fine hairs by providing a recrystallisation inhibitor similar to antifreeze proteins.
Today I found Hair ice, also known as ice wool or frost beard. It is formed on moist, rotting wood with a certain type of fungus. Each of the smooth, silky hairs has a diameter of about 0.02 mm. It is rare and only there when the conditions are right.
Hair ice forms on damp, decaying wood of deciduous trees when temperatures are slightly below 0 °C (32 °F) and the air is moist. Generally, when a cold period follows a rainy period. Each of the smooth, silky hairs has a diameter of about 0.02 mm and a length of up to 20 cm. Evidence shows that the fungus Exidiopsis effusa is also necessary for the ice to form fine hairs by providing a recrystallisation inhibitor similar to antifreeze proteins.
Lots about this morning. Deep in the valley that the sunlight had yet to reach. The hoar frost was pretty spectacular too.
40 image focus stack in Helicon
The temperature dropped to -5c which is when Frosty Beard/Hair Ice can form from a certain type of fungus.
Donald Trump's latest hair transplant!
Or, a nice clump of hair ice. Quite a bit around on this particular morning.
Hair ice forms on moist, rotting wood from broadleaf trees when temperatures are slightly under 0 °C (32 °F) and the air is humid. Generally when a cold period follows a rainy weather period.
Each of the smooth, silky hairs has a diameter of about 0.02 mm (0.0008 in) and a length of up to 20 cm (8 in).
The fungus Exidiopsis effusa has been proven to shape the ice into fine hairs by providing a recrystallization inhibitor similar to antifreeze proteins.
A very cold, crisp day today; ideal conditions for the formation of Hair Ice on the dead wood in the local woodland.
IJshaar of haarijs is een zeldzaam natuurlijk verschijnsel waarbij een haarachtige, wollige ijsstructuur ontstaat op dood en nat kernhout, dus niet op de bast, van loofbomen. IJshaar kan ook op naaldhout voorkomen, maar dat is nog zeldzamer. Haarijs staat ook wel bekend als 'de baard van Koning Winter'.
IJshaar kan ontstaan als de luchttemperatuur even onder het vriespunt ligt. In het hout komen schimmels voor en bij de stofwisseling van deze schimmels komt onder andere water vrij dat door zeer kleine openingen in het hout (houtstralen) naar buiten wordt geperst. Het naar buiten geperste water bevriest tot een haarachtige structuur. Een hoge luchtvochtigheid is noodzakelijk voor de succesvolle vorming van ijshaar zodat het naar buiten geperste water niet kan verdampen en voor bevriezing beschikbaar blijft. Zolang de schimmels water blijven produceren en de klimatologische omstandigheden gunstig blijven, kan ijshaar aan blijven groeien. Als de luchttemperatuur te laag wordt, daalt de stofwisseling van de schimmels tot zo'n laag niveau dat er onvoldoende water geproduceerd wordt.
IJshaar is zeer teer en smelt na aanraking direct weg. Als ijshaar aan zonlicht wordt blootgesteld, zal het snel sublimeren en verdwijnen. IJshaar is daarom 's morgens vroeg of alleen op schaduwrijke plaatsen te vinden.
Frostbeard
My youngest son asked me if that was what Santa's beard was made of. In some mixed forests, hair ice forms on rotten wood when a period of rain is followed by a period of ice, but only if the fungus Exidiopsis effusa is present in the forest.
I was lucky enough to find some of this recently..
BBC Earth's website say this: 'Scientists have now discovered exactly what gives "hair ice" its strange shape. It's caused by a fungus called Exidiopsis effusa.
Mysterious "hair ice" forms into hairy clouds that look like candy floss, and we now have an idea why.. In some forests on humid winter nights, peculiar ice crystals form on rotting wood.
The ice looks like bursts of hairy cloud, and sometimes a bit like candy floss. These hair-like wisps appear at night and melt when the sun comes up'.
So it seems it only appears on certain dead wood species, under certain atmospheric conditions, in the presence of the above named fungus! If there had been more frost around it would have blended in and I wouldn't have noticed it. (Just a mobile phone macro).
There is a particular part of the regular dogwalk route in the local woodland that is always cooler than the surronding area. In summer it can be a pleasant relief, in winter it is where you usually reach for the gloves. This morning it offered the right conditions for the formation of Hair Ice, a supposedly rare formation requiring a combination of conditions and ingredients to be in place - see link below.
Hair ice on a decaying birch branch, southwest Iceland.
Hair ice, also known as frost beard or ice wool, is a rare ice formation found on dead hardwood colonized by Exidiopsis effusa, a species of wood decay fungus. It only forms in calm weather, after periods of rain, when the air is humid and the temperature just below 0°C (32°F).
Today I found Hair ice, also known as ice wool or frost beard. It is formed on moist, rotting wood with a certain type of fungus. Each of the smooth, silky hairs has a diameter of about 0.02 mm. It is rare and only there when the conditions are right.
In some mixed forests, hair ice forms on rotten wood when a period of rain is followed by a period of ice, but only if the fungus Exidiopsis effusa is present in the forest.
Wald zwischen Missunde und Weseby Schlei. Haareis mit Fasern von ca.3cm Länge, auf einem Ast auf dem Waldboden.
Haareis bildet sich durch völlig andere Prozesse als das sogenannte "Kammeis": flic.kr/p/RubFn7
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en.wikipedia.org/wiki/Hair_ice
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www.egu.eu/news/180/fungus-shapes-hair-ice-researchers-id...
Exidiopsis effusa
A nice clump of Hair Ice from this mornings walk. Quite a selection to be found from small patches on twigs to this fist sized piece on a fallen branch. I moved it to a better location to catch the morning sun filtering through the trees in the background.
Some info taken from Google AI:
"Hair ice" refers to a rare type of ice formation that appears as thin, hair-like strands growing on dead wood, primarily caused by the presence of a specific fungus (usually "Exidiopsis effusa") which facilitates the ice crystal growth under specific conditions of humidity and near-freezing temperatures; essentially, it looks like fine, silky hair made of ice.
Haareis besteht aus feinen Eisnadeln, die sich bei geeigneten Bedingungen auf morschem und feuchtem Totholz bilden können. Anders als Hydrometeore (zum Beispiel Raureifkristalle) entsteht Haareis aus dem im Holz enthaltenen Wasser, nicht aus Luftfeuchtigkeit.
Ausgelöst wird der Prozess durch ein Pilzmyzel im Holz.
Neulich, oberhalb des Uracher Wasserfalls, bin ich auf diesen Pilz gestoßen, der dort in großen Mengen auftrat. Was ich im ersten Moment für Schnee gehalten hatte, war keiner, wenn auch die Farbe voll gestimmt hat.
Weiß jemand, was das für einer ist?
Danke Danubio, wir haben es hier also mit Eis zu tun, das allerdings, laut Wikipedia, durch den Stoffwechsel von Pilzen im Totholz entsteht.
Ice hair or hair ice is a rare natural phenomenon in which a hairy, woolly ice structure is created on dead and wet heartwood (not on the bark) of deciduous trees.
Ice hair can occur if the air temperature is just below freezing. Fungi are found in the wood and during the metabolism of these fungi, water is released that is forced out through very small openings in the wood (wood beams). The water pressed out freezes to a hair-like structure. A high humidity is necessary for the successful formation of ice hair so that the water pressed out cannot evaporate and remains available for freezing. As long as the fungi continue to produce water and the climatic conditions remain favorable, ice hair can continue to grow. If the air temperature becomes too low, the fungal metabolism falls to such a low level that insufficient water is produced.
Ice hair is very delicate and melts away immediately after contact. If ice hair is exposed to sunlight, it will sublimate and disappear quickly. Ice hair can be found early in the morning or in shady places.
In the year 2015, German and Swiss scientists identified the fungus Exidiopsis effusa as key to the formation of hair ice. The fungus was found on every hair ice sample examined by the researchers, and disabling the fungus with fungicide or hot water prevented hair ice formation.The fungus shapes the ice into fine hairs through an uncertain mechanism and likely stabilizes it by providing a recrystallization inhibitor similar to antifreeze proteins.
For me we live in a post post-modern era ;o) (not very technically correct I know!!)
so this branch that had sprouted these fine ice hairs reminded me of the historical period called 'modern' ...
I'd never seen anything quite like it before - 7.5 hours on a sub zero moor yesterday..
brr just started snowing here