2017년 3월 26일 일요일

The snow

The snow

The snow which was piled up on the sea ice. The surface of the snow shows various expressions by nature of the snow or wind.
Tokyo, a town of Shinjuku which was wrapped up by snow.
The frozen snow which is melting.
A footprint, a leg sign is easy to remain to the fresh snow clearly.

The snow (せきせつ) is snow piled up in the ground. As a weather term, snow or hail (hail) says the state that half covered up the above of the ground.

Table of contents

Summary

The snow does not decrease until snow melts, but may decrease basically by being blown off for sublimation, wind. Because an announcement level is a value at the snow meter setting point to the last, I may be piled up than snow quantity announced in drifts in some places in the same area.

A state is different from "snow 0cm" in "there is no snow". According to the definition of the Meteorological Agency, "snow 0cm" is the state that snow and hail wrapped up the ground around the observation point more than half. As for "doing it that it is the snow", snow and hail point to the state that does not overturn to a cuttlefish, half of the ground around the observation point snow and hail really.

Depth of the snow is called quantity of snow or 積雪深, and "snow - cm" flowing by news and a weather forecast is the snow record of the snow setting point in total. The maximum of the snow in the period of time is called the deepest snow (さいしんせきせつ). Because these are different from the snowfall, I need attention. I call it, and the weight of quantity of snow and 積雪深 per unit area is referred to in "kg/m2" and "kN/m2" snow weight and snow load and is measured with snow weight meters. The Building Standard Act enforcement order Article 86 others have fate about the snow load.

In addition, by the definition of the Meteorological Agency, the thing that solid rainfall was piled up is the snow, but does not call it the snow when hail and hail are piled up in the summer.

Fusion of the snow is slow, and even snow material hardly comes loose in the chillier area, and accumulation of the snow advances. The Meteorological Agency defines "the state that the snow continued more than 30 days" as the long-term snow or lingering snow in Japan. A period of the lingering snow becomes long and, in the chillier area, is over summer and may continue it more than one year. This state continues for many years in polar region in particular and Takayama and forms the glacier where perpetual snow and it are compressed, and there is it.

Expression "lying" on used in a snowy (it is a noun and is not a verb) part piled up to the last is misuse with the snow.

Classification of the snow

In the Japanese frozen snow society, I classify the snow in nine kinds of the next by nature of the snow [1].

  • The form of the crystal at the time of fresh snow - snowfall approximately completely remains.
  • A grain of the ice which some crystals such as the こしまり snow - bough form stayed, and was almost round. Small granular snow.
  • A grain of the ice which was round by granular snow - compression and sintering. Particles are connected by the tissue of the halftone plate form gently. Granular snow.
  • A grain of the ice which became a fault size by action of corn snow - water. There is an again frozen thing that I include water in the inside, the surface. Corn snow.
  • A grain of the small ice that corn snow - fresh snow became the flat shape by adhesion of fusion, the frost as for going. Small frost corn snow.
  • The frost which doing it matured into as a nucleus in corn snow - fresh snow was enlarged and became a grain of the ice of 骸晶状. Frost corn snow.
  • An ice board - board form, lamellar ice.
  • The frost which develops on the surface of the surface frost - snow layer.
  • The firm layer that was enacted by re-freeze to be possible on the crust - snow layer surface.

Record of the snow

World

in Japan

An average climate [5] of the snow in the major cities (Hokkaido, Tohoku) with statistics [6] [7]
(for 1981-2010 years in the Meteorological Agency, the observation point at 2012)
City (the first snow of the year) The first day of the snow The first day of the lingering snow The lingering snow whole day The snow whole day (last snow of the season) Remarks
Periods from the first day of the snow / lingering snow to the whole day
▷11/1
4/30◁
The depth annual maximum of the snow
Wakkanai October 22 November 3 November 26 April 4 April 21 May 2 The first snow of the year is the earliest at the point where observation is carried out.
170 days /130 day
81cm
Asahikawa October 23 November 3 November 22 April 8 April 16 April 28 The first day of the lingering snow is the earliest at the point where observation is carried out, and the lingering snow whole day is late.
165 days /138 day
94cm
Abashiri October 31 November 10 December 3 April 3 April 23 May 9 The snow whole day, last snow of the season is the slowest at the point where observation is carried out.
165 days /122 day
57cm
Sapporo October 28 November 8 December 4 April 4 April 10 April 19 -
154 days /122 day
100cm
Yamagata Hijiori Because it is unmanned, I do not observe it. The Sea of Japan side mountains. There is the most age deepest snow at the point where observation is carried out.
321cm
Sendai November 24 December 8 Unavailable Unavailable March 23 April 7 -
106 days
 
17cm

in Algeria

The snow was observed on a dune of Algerian town, アインセフラ located in the Sahara on December 19, 2016 [8]. The snowfall in the Sahara is observed on February 18, 1979, but the snow at that time melts in 30 minutes, and, as for the snow left for nearly one day, a snowfall of December, 2016 becomes naive in history of observation [8]. In addition, Algeria of December, 2016 and the snow in the neighborhood of border of Morocco are confirmed by the image analysis of Landsat 7 [8].

Effect of the snow

The snow is known to have a big influence on the distribution of the creature in the field of the creature. In the area with the time when the above, temperature fall, minimum temperature for the chilliness period and the cold resistance of the creature have a meaning big as the distribution factor to some extent. However, as for the snow, temperature may not fall as the fresh air in the snow to include much air. For example, I am distributed in the height that is lower than a shrub to the north because the Sea of Japan side has much snow of the winter season so that a warmer local creature is unexpected. The examples include camellias well.

Footnote

[Help]
  1. The ^ "vocabulary of the snow classification." Japanese frozen snow society Hokkaido Branch. February 6, 2014 reading.
  2. The standing according to the Japanese meteorological elements in the version before ^ a b c d e Meteorological Agency supervision "weather yearbook" 2007 and the world and weather record of Japan
  3. It is value (value that I turn on the year) moon deepest snow (cm) of 1-10 in history of ^ Meteorological Agency observation
  4. It is 256 centimeters of snow, new record or Italian CNN, March 11, 2015 in ^ a b 18 hours
  5. ^ "weather data search Meteorological Agency of the past", (occasional update), April 10, 2013 reading
  6. ^ "average climate Sapporo district meteorological observatory of 寒候期現象", April 10, 2013 reading
  7. ^ "average climate Sendai district meteorological observatory of the first whole day of the snow, the long-term snow", April 10, 2013 reading
  8. It snows in the ^ a b c Sahara; is weather news, February 9, 2017

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