Desert day (meteorology)

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Climatological knowledge

Day temperature T: max / med / min
Day temperature  T : max / med / min

Air temperature dependent days
  • T max  ≥ 35 ° C
    		•  Desert day
  • T max  ≥ 30 ° C
    		•  Hot day
  • T min ≥ 20 ° C
    		•  Tropical night
  • T max ≥ 25 ° C
    		•  Summer day
  • T med <15 ° C / 12 ° C
    		•  Heating day
  • T med ≥ 5 ° C
    		•  Vegetation day
  • T min <0 ° C
    		•  Frost day
  • T max <0 ° C
    		•  Ice day
    not uniformly defined: Cold day
    Weather- dependent days
    Cloud cover Bright day
    Cloud cover Cloudy day
    Cloud cover Foggy day
    Humidity / temperature Sultry day
    Precipitation Precipitation day
    Precipitation Rainy day
    Precipitation Hail day
    Precipitation Snow (cover) day
    storm Storm day
    storm Thunderstorm day

    Desert day , also extremely hot day , English Extremely hot day , also known by meteorologists under the abbreviation TX35GE , is a recently emerged meteorological-climatological term for days on which the maximum daily temperature reaches or exceeds 35 ° C. It is used for a more precise representation of the climate of a location and for assessing heat waves . The measurements are taken in a standard weather hut at a height of two meters. The set of desert days is a subset of the hot days (hot days, tropical days) and the summer days . If the night-time low temperature does not drop below 20 ° C, one also speaks of a tropical night .

    To the subject

    30 ° C - the traditional criterion of a hot day in German-speaking countries - is hot in Central Europe, but by no means unusual: For example, Eastern Austria has an average of 10–15 hot days per year over many years. Therefore, an abnormally hot day is increasingly being used as a real exception (extreme heat anomaly ). The limit of 35 ° C is propagated within the framework of the CCl / CLIVAR / JCOMM Expert Team on Climate Change Detection and Indices ( ETCCDI ) project (notation there TX35GE).

    • The expression desert day is increasingly found in Austria. The ZAMG uses 35 degree day or extremely hot day.
    • The Slovak weather service SHMÚ and also the Czech ČHMÚ speak of Supertropický deň ('supertropical day').
    • The Hungarian OMSZ uses Forró nap ('[burning] hot day')

    List of measured values: Desert days per year on a long-term average

    This article or paragraph describes the situation in Austria . Help us to describe the situation in other countries.

    place Country Height ∗ there Averaging period ∗∗
    Munich - LMU Germany 517 2.3 2005-2015   
    Mainz ( Marienborn ) Germany 153 1.2 1991-2017
    Bolzano -LKH Italy (South Tyrol) 254 4.9 2005-2014
    Bregenz Austria 400 0.4 2005-2014
    Eisenstadt Austria 135 2.0 2005-2014
    Graz University Austria 366 0.6 2005-2014
    Innsbruck University Austria 578 1.8 2005-2014
    Klagenfurt Austria 447 1.9 2005-2014
    Linz city Austria 298 1.0 2005-2014
    Sankt Pölten Austria 272 1.1 2005-2014
    Salzburg -Freisaal Austria 430 1.0 2005-2014
    Vienna -Hohe Warte Austria 171 1.4 2005-2014
    Remarks:
    ∗∗ Sorted by the middle of the interval

    Sources: South Tyrolean Weather Service, ZAMG

    See also

    Web links

    Wiktionary: Desert day  - explanations of meanings, word origins, synonyms, translations

    Individual evidence

    1. ↑ Note: In contrast to the color markings for the temperature thresholds, the 0 ° C line on the graphic is on the border between turquoise and blue. →  Annual cycle of the graphic (animated)
    2. ↑ a b c d e f g h i j k l m n o Climatological knowledge days in the weather dictionary of the German Weather Service
    3. ↑ Germany : 15 ° C according to VDI 2067 ; Austria , Switzerland , Liechtenstein : 12 ° C according to Usance
    4. ↑ also T med ≥ 10 ° C: day of the main vegetation period
    5. ↑ Climate data from Austria 1971 - 2000 , ZAMG (selected stations)
    6. ↑ a b cf. Vlny tepla / Heat waves, Hurbanovo 1901-2015. Shmu> Aktuality , August 10, 2015 (Slovak National Meteorological Service) - Sun, announced it at the measuring point Hurbanovo since 1901 only one year, namely 1926 not a single Hitzetag.
    7. ^ Indices of extremes> Indices dictionary: Heat. KNMI: Climate (Dutch Weather Service, English).
    8. ↑ a b Szélsőségek vizsgálata. Table for Klímamodellezés , OMSZ> Tevékenységek ; English version Climate modeling> Extreme indices .
    9. ↑ The abbreviation encodes “ T emperature e x treme 35 ° C g reater or e qual”.
    10. ↑ The expression was wrongly attributed to the Austrian weather service ZAMG , which referred to a mailing of the hail insurance : Climate change: New unprecedented record of desert days in Austria: Drought damage in agriculture increases day by day  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. @1@ 2Template: Dead Link / www.hagel.at   Press release Austrian Hagelversicherung, 10 August 2015; Climate change: New unprecedented record of desert days in Austria. Press release APA OTS0081, August 10, 2015.
    11. ↑ a b c d e f g h i j k In places new records for the 35 degree days. Zang: Climate> News, August 10, 2015.
    12. ↑ The Slovak weather service first used the term in 2013: Pavel Stastny: Supertropický day. SHMÚ: Actuality , August 18, 2015.
    13. ↑ In this regard, Hungarian has two words for 'hot', forró and hőség , Hőségnap means the hot day> 30 ° C.
    14. ↑ a b Daily values ​​for temperatures and precipitation. (XLS 1.2 MB) Download measurement data Bolzano. In: Weather South Tyrol. Autonomous Province of Bolzano - South Tyrol Department for Family and Administration, accessed on August 19, 2019 .