One means of exchange of angular momentum between the atmosphere and the non gaseous parts of the earth is evaporation and precipitation. Massive quantities of water are in continual flux between the oceans and the atmosphere. As the mass of water (vapour) rises its rotation must slow due to conservation of angular momentum. Equally when if falls as rain, its rate of rotation will increase to conserve angular momentum. Any net global transfer of water mass from oceans to the atmosphere or the opposite implies a change in the speed of rotation of the solid/liquid Earth which will be reflected in LOD.
One means of exchange of angular momentum between the atmosphere and the non gaseous parts of the earth is evaporation and precipitation. The water cycle moves massive quantities of water between the oceans and the atmosphere. As the mass of water (vapour) rises its rotation must slow due to conservation of angular momentum. Equally when if falls as rain, its rate of rotation will increase to conserve angular momentum. Any net global transfer of water mass from oceans to the atmosphere or the opposite implies a change in the speed of rotation of the solid/liquid Earth which will be reflected in LOD.
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Massive
The water cycle moves massive
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are in continual flux