Wintertime precipitation variability over the Arabian Peninsula and its relationship with ENSO in the CAM4 simulations

K. Niranjan Kumar, T. B.M.J. Ouarda, S. Sandeep, Ajaya Ravindran

    Research output: Contribution to journalArticle

    Abstract

    The climate variability on Earth is strongly influenced by the changes in the Sea Surface Temperature (SST) anomalies in the tropical oceans. More specifically, the inter-annual climate variability in the tropics as well as extra-tropical areas has large impact due to the anomalous SSTs in the tropical Pacific coupled with the El Niño Southern Oscillation (ENSO) through atmospheric teleconnections. However, the effect of ENSO on Middle Eastern region, specifically the Arabian Peninsula (AP) is marginally explored in previous studies. Hence, this study explicitly focuses on the assessment of ENSO variability and its winter climate teleconnections to the AP using the Community Atmospheric Model Version 4.0 (CAM4) simulations and Reanalysis datasets. ENSO teleconnections are also evaluated based on two sensitivity experiments (ENSO-related and ENSO-unrelated) using the CAM4 model. It is observed that during El Niño years the peninsular region receives more rainfall through enhanced moisture transport associated with anomalous westerly winds from adjoining Seas. The Rossby wave energy propagation in the atmosphere underlies important teleconnections involving ENSO. It is also noticed that there exist a distinct change in the phase of the Rossby wave pattern during El Niño and La Niña years which further causes the shift in the position of the jet stream over the Middle East.

    Original languageEnglish (US)
    Pages (from-to)2443-2454
    Number of pages12
    JournalClimate Dynamics
    Volume47
    Issue number7-8
    DOIs
    StatePublished - Oct 1 2016

    Fingerprint

    Southern Oscillation
    teleconnection
    simulation
    Rossby wave
    climate
    sea surface temperature
    jet stream
    atmospheric model
    wave energy
    westerly
    temperature anomaly
    moisture
    rainfall
    atmosphere
    winter
    ocean

    Keywords

    • CAM4
    • ENSO
    • Precipitation
    • Rossby waves
    • Teleconnections

    ASJC Scopus subject areas

    • Atmospheric Science

    Cite this

    Wintertime precipitation variability over the Arabian Peninsula and its relationship with ENSO in the CAM4 simulations. / Niranjan Kumar, K.; Ouarda, T. B.M.J.; Sandeep, S.; Ravindran, Ajaya.

    In: Climate Dynamics, Vol. 47, No. 7-8, 01.10.2016, p. 2443-2454.

    Research output: Contribution to journalArticle

    Niranjan Kumar, K. ; Ouarda, T. B.M.J. ; Sandeep, S. ; Ravindran, Ajaya. / Wintertime precipitation variability over the Arabian Peninsula and its relationship with ENSO in the CAM4 simulations. In: Climate Dynamics. 2016 ; Vol. 47, No. 7-8. pp. 2443-2454.
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