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  • Arctic sea-ice changes drive precipitation decreases over California. Arctic sea-ice loss induces high-latitude changes. These changes trigger tropical circulation and convection responses. Decreased convection and decreased upper level divergence in the tropical Pacific Ocean then drive a northward propagating Rossby wavetrain, with anticyclonic flow forming in the North Pacific Ocean. The result? The flow steers the wet tropical air masses away from California.
    Kathy Seibert, Lawrence Livermore National Laboratory
    Arctic sea-ice changes drive precipitation decreases over California. Arctic sea-ice loss induces high-latitude changes. These changes trigger tropical circulation and convection responses. Decreased convection and decreased upper level divergence in the tropical Pacific Ocean then drive a northward propagating Rossby wavetrain, with anticyclonic flow forming in the North Pacific Ocean. The result? The flow steers the wet tropical air masses away from California.
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