"Land precipitation" refers to any form of water, like rain or snow, that falls from the atmosphere and lands on land or the Earth's surface. Full definition
Seasonal decreases in land precipitation since the 1950s are the main cause for some of the drying trends, although large surface warming during the last two to three decades has also likely contributed to the drying. (ipcc.ch)
(Bottom) Time series of annual global land precipitation anomalies with respect to the 1961 to 1990 base period for 1900 to 2005. (ipcc.ch)
Decreased land precipitation and increased temperatures that enhance evapotranspiration and drying are important factors that have contributed to more regions experiencing droughts, as measured by the Palmer Drought Severity Index. (ipcc.ch)