Abstract:The study of the interaction of weather and climate features of the Intra Americas Sea have risen several fundamental questions in the recent decades. Here we focus on how the development of the North American Monsoon (NAM) is dominated by the Caribbean and tropical Atlantic. Using a long term basis analysis of moisture supply to the NAM domain based upon FLEXPART Lagrangian trajectories, the role of the moisture supply from the Caribbean Sea and the Gulf of Mexico previous to the monsoon onset is analyzed. Regardless the NAM area requires the input from other sources, it is the eastern source which provides the required supply to activate the land moisture processes over the Sierra Madre region. In this work we explore how the Western Hemisphere Warm Pool (WHWP) increases the moisture content of the lower troposphere. The role of the Caribbean ow Level Jet (CLLJ) as a moisture conveyor to the eastern Sierra Madre region is also analyzed. The study includes an insight of the moisture transport process under warm and cold ENSO events.
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