Batum Döngüsünün Zamansal ve Alansal Değişkenliğinin Sayısal Okyanus Modeli ile Belirlenmesi

Year 2020, Volume: 20 Issue: 1, 165 - 173, 17.03.2020

Bilge Tutak

https://doi.org/10.35414/akufemubid.627279

Abstract

Doğu Karadeniz’de
bulunan Batum döngüsü oldukça dinamik ve değişken bir yapıdadır. Zamansal ve
mekânsal olarak değişikliklerin tespit edilmesi için yüksek çözünürlüklü (1.5km
x 1.5km) 3 boyutlu bir okyanus modeli kullanılarak Karadeniz üzerinde bulunan
tüm döngüler belirlenmiştir. Özellikle 30 km ve daha büyük çaptaki döngülerin
detaylı analizi yapılarak Batum döngüsünün zamansal ve mekânsal olarak nasıl
değişiklik geçirdiği belirlenmiştir. Batum döngüsü Rim Akıntısı dengesizlikleri
sonucu özellikle bahar mevsimi başında ya da ortasında oluşur ve sonbahara
kadar Doğu Karadeniz’de varlığını sürdürür. Yaz boyu Rim Akıntısının kıyı
sularını zorlayarak üretimine sebep olduğu kıyısal antisiklonlardan bazıları
filamentler oluşturarak Batum döngüsüne karışır ve döngünün zayıfladığı
dönemlerde genişlemesine ve gücünün artmasına sebep olur. Dönemsel olarak Batum
döngüsü yavaş hareketler ile kuzey - kuzey batı yönünde hareketleri sonucu
Kırım kıyılarına doğru küçülerek varlığını kaybeder. Döngü varlığını yaklaşık 4
ay sürdürür ve 1 km/gün’den daha yavaş bir hız ile hareket eder. Döngünün
içerisinde kalan pasif taşınabilir maddelerin büyük bir çoğunluğunun bu 4 aylık
sürede döngünün etkisinden kurtulması mümkün olmamaktadır.

Keywords

Karadeniz, Okyanus Modelleme, ROMS, Girdap, Döngü, Batum Döngüsü

Supporting Institution

İstanbul Teknik Üniversitesi Bilimsel Araştırma Projeleri Birimi

Project Number

39408

Thanks

Bu çalışmanın üretildiği proje İstanbul Teknik Üniversitesi Bilimsel Araştırma Projeleri birimi tarafından 39408 numaralı proje olarak desteklenmiştir.

Identification of the Temporal and Spatial Variability of Batumi Eddy by a Numerical Ocean Model

Abstract

Batumi eddy has a highly
dynamic and variable structure. All eddies were identified using a three-dimensional
high resolution (1.5km x 1.5km) numerical ocean model. Especially the temporal and
spatial variation of eddies larger than 30 km were analyzed in detail to
understand how Batumi eddy is changing spatially and temprorally.Batumi eddy is
formed by the instabilities of the Rim current during early-mid spring and
exist until early autumn in the East Black Sea. Some of the anticyclones that
was forced out of the coastal waters by the Rim current turns into filaments to
join with the Batumi eddy increasing the strength and size during when the eddy
becomes weaker and smaller. The Batumi eddy moves moves slowly north -
northwest towards Crimean shore, gets smaller and vanishes. The Batumi eddy
exists for around four months and moves with a speed of less then 1 km /day.
Most of the passive tracers that are released inside the eddy cannot escape the
effect of Batumi eddy during the 4 month life time.

Keywords

Black Sea, Ocean Modeling, ROMS, Eddy, Batumi Eddy

Project Number

39408

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