According to a new study, the changes seen in the hydrological cycle can't be explained without invoking human activity.
By looking at rainfall patterns at sea rather than on land, the authors have been able to show that changes in the hydrological cycle are happening across broad areas of the planet in ways that can’t be explained without invoking human activity.
The new study confirms that salinity is rising in some parts of the ocean and falling in others. In the North Atlantic, for example, there has been more evaporation and less rainfall, Pierce said, so that ocean basin is getting saltier.
In the Pacific, the opposite has been happening — in general, anyway. “The North Atlantic has a fairly constant profile, but if you look at the part of the Pacific between Japan and Australia, you see real differences in salinity as you go,” Pierce said.