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Influence of the MJO on daily surface air temperature over Iran

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Pourasghar, F, Oliver, ECJ ORCID: 0000-0002-4006-2826 and Holbrook, NJ ORCID: 0000-0002-3523-6254 2021 , 'Influence of the MJO on daily surface air temperature over Iran' , International Journal of Climatology , pp. 1-24 , doi: 10.1002/joc.7086.

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Abstract

The influence of the Madden‐Julian Oscillation (MJO) on surface air temperature over Iran is examined using daily data from meteorological stations from 1979–2015. Composites of daily surface air temperature anomalies are positive in MJO phases 1 and 8 and negative in MJO phases 3–4 with broader region positive tendencies also in MJO phases 2 and 7, and negative tendencies in MJO phases 5–6. This variability is associated with horizontal temperature advection, whereby the southerly (northward) winds act to heat and the northerly (southward) winds cool Iran, in association with the MJO. Further, we find that daily minimum surface air temperatures respond more strongly to the MJO than do daily maximum surface temperatures. These signals correspond to cloudy and humid conditions.

Item Type: Article
Authors/Creators:Pourasghar, F and Oliver, ECJ and Holbrook, NJ
Keywords: daily surface air temperature, Iran, Madden-Julian Oscillation, surface air temperature
Journal or Publication Title: International Journal of Climatology
Publisher: John Wiley & Sons Ltd
ISSN: 0899-8418
DOI / ID Number: 10.1002/joc.7086
Copyright Information:

Copyright 2021 Royal Meteorological Society. This is the peer reviewed version which has been published in final form at https://doi.org/10.1002/joc.7086 This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.

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