Influence of the Equatorial Waves on the Subseasonal Western Pacific Monsoon Variability

The summer and winter monsoons affect the livelihood of populations residing in the tropical and subtropical regions around the globe. The intraseasonal oscillations associated with the tropical equatorial waves contribute to this monsoon variability and they can create conditions lead to the bogus monsoon onset. The bogus monsoon onset posts a challenge for monsoon forecast. Using the Naval Research Laboratory Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS), the relationship between the equatorial waves and Western Pacific monsoon variability are evaluated for the 2017-2018 season. COAMPS air-sea and air-land interactions sensitivity experiments are used to investigate their individual and combined contribution to the equatorial waves and monsoons variability.