Şiddetli sıcak hava dalgaları: dinamik-fiziksel etkenler ve bu sıcak hava dalgalarının özellikleri

Yıl 2017, Cilt: 21 Sayı: 2, 190 - 202, 01.04.2017

Meral Demirtaş

https://doi.org/10.16984/saufenbilder.297005

Cited By: 2

Öz

 Sıcak hava dalgası (SHD) oluşumunu
tetikleyen, idamesini yapan dinamik ve fiziksel etmenler incelenmiştir. Yüksek
basınç sistemlerinin SHD işlemlerindeki rolünden dolayı, atmosferik
bloklamanın belirlenmesi için bir metot tanımlanmıştır. SHD teşhisinde, yere
ve zamana göre değişen referans sıcaklığını bularak, SHD parametrelerini
hesaplayan bir metot kullanılmıştır. 2003, 2012 ve 2015 Haziran-Temmuz-Ağustos
dönemlerine ait 500hPa jeopotansiyel yüksekliği, 850hPa sıcaklığı, toprak nemi
ve deniz yüzeyi sıcaklıklarının iklim ortalamalarından olan sapmaları analiz
edilmiştir. Bu dönemlerindeki dinamik ve fiziksel etmenler, atmosferik
bloklama ve SHD bulgularıyla birlikte irdelenmiştir. Sonuçlar, SHD en çok Ege
Bölgesi’nde etkili olduğunu göstermektedir. Yaz aylarında yıldan yıla görülen değişkenlikler
iklim değişkenliğinin göstergesi olarak değerlendirilmekdedir.

Anahtar Kelimeler

Sıcak hava dalgaları, atmosferik bloklama, iklim değişkenliği

Intense heat waves: dynamical-physical factors and characteristics of these heat waves

Öz

Dynamical and physical factors that trigger and maintain heat waves (HW)
were examined. Since high pressure systems play a role in HW processes, an
atmospheric blocking method was introduced. A HW detection method which employs
spatially and temporally changing reference temperature to compute HW
parameters was used. Departures from climate averages of 500-hPa geopotential
height, 850-hPa temperature, sea-surface-temperatures and soil wetness of 2003,
2012 and 2015 June-July-August were analyzed. HWs were examined together with
dynamical and physical factors, atmospheric blocking and HW characteristics.
Results indicate that HWs were influential over the Aegean region. Year-to-year
variability in summer temperatures is considered as signs of climate
variability. 

Anahtar Kelimeler

Heat waves, atmospheric blocking, climate variability

Kaynakça

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