Annual extreme precipitation trends for western Turkey in associated with north Atlantic oscillation (NAO) index

ACAR R., ŞENOCAK S.

ENERGY EDUCATION SCIENCE AND TECHNOLOGY PART A-ENERGY SCIENCE AND RESEARCH, cilt.29, sa.1, ss.475-486, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 1
  • Basım Tarihi: 2012
  • Dergi Adı: ENERGY EDUCATION SCIENCE AND TECHNOLOGY PART A-ENERGY SCIENCE AND RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.475-486
  • Anahtar Kelimeler: Precipitation, Mann-Kendall test, Sen's T test, North Atlantic Oscillation (NAO), Mediterranian hydroclimatic region, ENERGY, VARIABILITY, PATTERNS, EUROPE, TESTS
  • Atatürk Üniversitesi Adresli: Evet

Özet

Mediterranean hydroclimatic region is one of the sensitive regions to climate variation, particularly to precipitation changes in Turkey. In this study, trends are estimated for different durations of annual extreme time scales (t = 1, 6, 12 and 24 hours) for approximately 50 years were examined for the seven stations in Mediterranean hydroclimatic region. Non-parametric tests (such as Mann-Kendall and Sen's T tests) were used to determine precipitation trends. The direction of the annual extreme precipitation trends is, in general, upward. Izmir station has the most significant positive trend in all durations. Antalya and Bursa have also increased for some duration. There are precipitation anomalies in 1973 and 1974 over Turkey for the influence of the NAO. So the annual extreme rainfall data set divided into two groups, before 1973 and after 1974, for all stations. The same Mann - Kendall and Sen's T tests procedure are applied and considered to search for possible trends taking into account North Atlantic Oscillation (NAO) Index. In general, according to this study NAO has a significant effect on Mediterranean precipitation trends.