Precipitation periodicities in Kurdistan – Iraqi region

• Published in: Journal of Agrometeorology
• Main Author: MIRAN AKRAM OMAR
• Format: Article in Journal/Newspaper
• Language: English
• Published: Association of agrometeorologists 2013
• Subjects: Precipitation Periodicity; Iraq; NAO; ENSO; SOI; Agriculture; S; North Atlantic; North Atlantic oscillation
• Online Access: https://doi.org/10.54386/jam.v15i1.1432; https://doaj.org/article/76c8f125f6f744d990f751b67a1b337b

Periodicities in the annual precipitation of Sulaimani, Erbil and Duhok cities of Kurdistan, Iraq have been studied visualising the data for 70 years. The three precipitation series, North Atlantic oscillation (NAO) index series and Southern oscillation index series were subjected to spectral analysis by Blackman-Tukey method to investigate the possible periodicities exist that in the rainfall series and their relations to NAO, ENSO and solar cycle. It was found that the cycles of 2, 2.7, 3.6, 4 and 10 years are related to NAO cycles, 5.4 year cycle is related to ENSO cycle and 11.1 year cycle is related to the solar cycle at Sulaimani site. The common rainfall cycles among the three sites were 2.8, 4.8 and 10 years.