Il tempo di Istanbul

[Knopflertemporalesco]

16135602700273791950389991544163.jpg

Strage a eminonu, tutto sparito eccetto chiazze, sul mar nero carica gli ultimi tiri di schiopo

[kima]

Florya e kadikoy sono i quartieri peggiori per la neve però

Si infatti, questo fa capire che già il servizio meteo turco sta considerando l area prettamente urbana e "marittima" di Istanbul come rappresentativa delle medie climatiche cittadine.

[Knopflertemporalesco]

Ma quindi in questa stagione invernale per ora sono caduti 25cm di neve?

25, di media, per nevicata. 50 cm, poi certe zone hanno fatto pure 75 80, altre (tipo kadikoy) avranno fatto nemmeno 20.

[dennis96]

25, di media, per nevicata. 50 cm, poi certe zone hanno fatto pure 75 80, altre (tipo kadikoy) avranno fatto nemmeno 20.

Quindi la media è raggiungibile altroché

[Knopflertemporalesco]

Quindi la media è raggiungibile altroché

Sono bastate 2 nevicate consistenti per arrivare quasi alla media. Quel che raro per Istanbul sono le nevicate over 50 60 cm in una unica botta, estremamente rare ed eventi storici.

[kima]

Sono bastate 2 nevicate consistenti per arrivare quasi alla media. Quel che raro per Istanbul sono le nevicate over 50 60 cm in una unica botta, estremamente rare ed eventi storici.

Per quelle bisogna spostarsi più a est lungo la costa del mare nero, come a Trabzon per esempio.

[burian br]

Se solo la Puglia fosse collocata 1000 km più a est...

[burian br]

Istanbul ha insomma il mio clima ideale: una città mediterranea con clima mediterraneo ma con possibilità di episodi nevosi e invernali seri

[kima]

Qui una piccola lista con alcuni degli eventi nevosi più importanti a Istanbul dal 2000:

2002
2002 KIŞI İSTANBUL


2004
İSTANBUL'UN MEŞHUR 2004 KIŞI


2012
31 Ocak 2012 Nihal Akca istanbulda yoğun kar yağışı 3G ile Ulke TV Gunun icinden canlı bağlantı - Dailymotion Video


2015
https://www.sozcu.com.tr/2015/gunun-...azlasi-747586/


2017
7 Ocak 2017 Kar Yağışı - İstanbul'da Tarihi Kar Yağışlarından...

Ma nevicate con accumuli di 10-20 cm ci sono state praticamente tutti gli inverni.

Poi, una statistica delle nevicate a marzo e aprile dal 1987 al 2020
http://www.forumatmosfer.com/konu-19...li-gunler.html

[kima]

Volendo approfondire ancora un pó, vi riporto questo estratto di un articolo di Oguz Aydin, che ha calcolato le medie climatiche per l osservatorio Kandilli in pieno centro di Istanbul dal 1911 al 1996 (traduzione con Google dal testo originale in turco)

Hello there.*In this article, we will share some of the data of Kandilli Observatory Meteorology Station, where the oldest meteorological records in Istanbul were made.*First, let's give some information about the Kandilli Observatory, where the station is located.*The Kandilli Observatory was first established in 1868 on Pera Street (Today's İstiklâl Caddesi) and the first observations were made on the 74-meter Pera Hill.*Kandilli Observatory was destroyed, along with all its tools, in the building opposite the Maçka Artillery School, where it was transferred by the director of the period, during the conflict in the revolution of April 12, 1909 (after the March 31 event).*Later, on June 21, 1910, the Minister of National Education appointed Fatin Gökmen to the observatory that was planned to be established.
The first meteorological observations of the Observatory were in July 1911.*These observations still continue in the same place.*The meteorology unit of the Observatory has the title of being the only organization that makes observations and forecasts related to meteorology in the country until the General Directorate of State Meteorology Affairs started regular observations in 1929.*The Meteorology Unit continues its research and observation activities with 11 personnel, 9 of which are meteorology engineers, and continues to meet the demands of meteorological information, consultation and observation from the society.
We will examine the 85-year data of the meteorology station between 1911 and 1996, first month by month and then as general annual averages.*These data will not only give us an idea about the Istanbul climate in the past years, but will also be an important reference source for where a meteorological value is in the averages at any time.*All graphics, tables and comments in section A have been compiled from the old internet pages of Kandilli Observatory, while section B belongs to me.
A. INVESTIGATION OF THE METEOROLOGICAL DATA OF KANDİLLİ OBSERVATORY BY MONTH

1- January Average Data
January is the month when winter is felt in Istanbul.*Temperatures tend to drop this month.*The magnitude of the drop reaches 2.4 degrees during the month.*While temperatures generally vary between 4.3-6.7 degrees, it makes the sharpest decrease between the 1st and 3rd days.*The most common maximum and minimum temperatures are 8.0 and 3.0 degrees, respectively.

January is a month in which temperatures are very likely to fall to negative values.*32% of all frost days (Tmin <0) are seen in January and the most risky day is January 29.*42% of the ice days (Tmax <0) seen in the whole year are seen in this month.*There is an average of 7 days of frost in a year.

[https://commandouzz]

When we look at the average for many years for Istanbul, the probability of snow in January, which we see to be quite cold, is 86%.*The monthly maximum number of snowy days is 17 days, and the monthly average number of snowy days is 5.4 days.*The average amount of precipitation per rainy day, which is obtained by dividing the total amount of precipitation, called the precipitation intensity, by the number of rainy days, is 5.5 mm.*Monthly average number of rainy days is 19.1 and monthly average rainfall is 106.0 mm.*The monthly highest total precipitation amount is 272.4 mm.*and the highest daily precipitation is 66.0 mm.*It has been observed.*The highest amount of precipitation observed in 10 minutes is 4.5 mm.*dir.

January is the month when 17% of total storms occur during the year.*According to statistics, the number of stormy days in this month is about 0.8 of December.*It was determined that the number of stormy days (5 days) in January 1958 was the highest in the period of 60 years examined.*The maximum average wind speed of 10 minutes in this month is 20.9 m / sec, S and was observed on 17 January 1986.*Hearth storms are mostly blown from southern (S) directions.*The probability of a storm in this month is 15%.

Since it is a port city, fog is very important for Istanbul.*The fog, which starts in the early hours of the morning mostly in low places and over the sea, ends with the increase of the temperature towards noon.*12% of the total foggy days during the year occur in January.*The average number of foggy days in this month for many years is about 4.5 days.*It was determined that the number of foggy days (15 days) was the highest in January 1981 in the 36-year period analyzed.*The probability of fog during this month is 89%.

2-February Average Data
February is the month when the cold reaches its peak in Istanbul.*In February, which is the coldest month for Istanbul, temperatures vary between 4.4-7.1 degrees.*This month, short-term drops and rises in temperatures are seen.*A general ascent is observed until the 14th and 15th days of the month and then a decline is observed.*The most common maximum and minimum temperatures are 7.5 and 2.5 degrees, respectively.

February is the most risky month in terms of the frequency of frost days and 34% of the frost days seen in the whole year are encountered in this month.*Frost days are likely to be found all month long and have been found on February 1 at the most so far.*The frequency of ice days is every two years.

[https://commandouzz]

Considering the results obtained based on observations of long years (1911-1996), it is seen that the maximum number of profitable days per month is 17 days.*In addition, the probability of snowfall for February is 88% and the average number of days with snow per month is 5.1.*The average amount of precipitation per rainy day is 5.1 mm, obtained by dividing the total amount of precipitation, called the precipitation intensity, by the number of rainy days.*dir.*The monthly average number of rainy days is 16.3 and the average monthly rainfall is 82.4 mm.*The monthly highest total rainfall is 229.8 mm.*and the highest daily precipitation is 86.9 mm.*The highest amount of precipitation observed in 10 minutes 4.9 mm.*dir.

February is the month in which 31% of the total storms occur during the year and the number of stormy days is the highest.*According to statistics, the number of stormy days in this month is approximately 1.9 times that of January.*It was determined that the number of stormy days (11 days) in February 1958 was the highest in the period of 60 years examined.*In this month, the maximum 10-minute average wind speed was observed as 22.3 m / s from S directions on 6 February and 19 February 1958.*February storms mostly blown from southern (S) directions.*The probability of a storm in this month is 28.3%.

12% of the total foggy days occur in February during the year.*The average number of foggy days for many years this month is about 4.3 days.*It was determined that the number of foggy days (13 days) in February 1968 was the highest in the 36-year period analyzed.*The probability of fog during this month is 86%.

3-March Average Data
It would not be an exaggeration to say that the winter season continues for Istanbul in this month, which is the first month of the spring season.*The average daily temperatures in this month range from 5.3-9.8 degrees.*Although a fairly regular increase is observed in the general course of temperature, ice (7%) and frost (19%) days continue to be seen.*However, after the winter season, the first summer (0.2%) days are also encountered in this month.

In agricultural operations to be carried out considering the beginning of the spring season, care should be taken against the danger of frost, especially in the first half of the month, due to temperatures that can reach -7 degrees.

[https://commandouzz]

If we look at the results obtained based on observations of long years (1911-1996);*The maximum number of profitable days per month for March is 15 days.*In addition, the probability of snowfall for this month is 73% and the average number of days with snow per month is 3 days.*Average amount of precipitation per rainy day is 4.5 mm, which is obtained by dividing the total amount of precipitation, called the precipitation intensity, by the number of rainy days.*dir.*Monthly average number of rainy days is 14.7 and monthly average rainfall is 66.6 mm.*The monthly highest total rainfall is 188.9 mm.*and the highest daily precipitation is 53 mm.*The highest precipitation amount observed in 10 minutes was 5.5 mm.*dir.

March is the month when 6% of the total storms occur during the year.*According to statistics, the number of stormy days in this month is approximately 0.19 from February.*In the period of 60 years examined, the maximum 10-minute average wind speed was observed as 19.9 m / sec, S on March 10, 1958.*March storms are mostly blown from (S) directions.*The probability of a storm during this month is 10%.

15% of the total foggy days occur in March during the year.*The average number of foggy days for many years for this month is about 5.3 days.*It was determined that the number of foggy days (12 days) was the highest in March 1974 in the 36-year period analyzed.*The probability of fog during this month is 97%.

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