Erratum to: The interannual precipitation variability in the southern part of Iran as linked to large-scale climate modes

Pourasghar, Farnaz; Tozuka, Tomoki; Jahanbakhsh, S; Sarraf, Behrooz Sari; Ghaemi, Hooshang; Yamagata, Toshio

doi:10.1007/s00382-012-1404-2

Cited by 2 publications

(1 citation statement)

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“…Heavy precipitation events over the central plateau of Iran are attributed to the persistence of a deep trough over the eastern Mediterranean Sea (Rousta et al ., 2016). While the fall and early winter precipitation in Iran have significant relationships with the Indian Ocean Dipole (IOD) and ENSO, the inter‐annual variation in late winter and spring precipitation is more strongly influenced by modes of variability over the Mediterranean Sea (Pourasghar et al ., 2012; Pourasghar et al ., 2019). In most parts of Iran, rainy months start from early November and end in late April.…”

Section: Introductionmentioning

confidence: 99%

Introducing new climate indices for identifying wet/dry spells within an Madden‐Julian Oscillation phase

Nazemosadat

Shahgholian

Ghaedamini

et al. 2020

Intl Journal of Climatology

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Daily values of precipitation in southwestern parts of Iran along with the corresponding Madden-Julian oscillation (MJO) phase are analysed to introduce some auxiliary indicators that can identify the wet and dry spells within a particular MJO phase. As a case study, the identification procedure focuses on phase 1 during the rainy season (Nov-Apr). The study shows that this phase contains two opposite spells, referred to as spells with pervasive precipitation (SWPP) and spells with widespread dryness (SWWD). Although the precipitation characteristics are essentially different between SWPP and SWWD, their associated MJO indices are found statistically identical. Therefore, the MJOprecipitation relationship fails to identify the wet/dry spells within an MJO phase. To resolve this deficiency, other climate indicators, which behave differently between these two spells, are introduced. The westward moisture flux over equatorial parts of the Indian Ocean and the northeastward moisture flux over the North African tropics are up to seven times stronger in the SWPP compared to SWWD. The dominance of a strong cyclonic (anticyclonic) circulation over the eastern side of the Mediterranean Sea and the negative (positive) west-east temperature gradient over southern parts of Iran are introduced as SWPP (SWWD) indicators. The study reveals that the SWPP (SWWD) coincides with a strong (weak) convection dipole that resembles the positive Indian Ocean dipole. The intensified (weakened) wind speed in the subtropical jet stream and persistence of the jet-exit-regions above Iran (Egypt and Saudi Arabia) are other SWPP (SWWD) indicators. Negative (positive) anomalies of sea surface temperature over the North Atlantic Ocean, the Black, Mediterranean, and Caspian Seas, as well as the Persian Gulf, signify the prevalence of the SWPP (SWWD). To the best of our knowledge, this is the first time that auxiliary indices are utilized to improve the MJO-precipitation relationship in southwestern Iran.

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Section: Introductionmentioning

confidence: 99%