Climate change affecting soil's ability to absorb CO2

The University School of Engineering conducted a study on how climate change affects the Earth's hydrological cycle and its impact on soil's ability to trap carbon dioxide. The study, published in Nature, analyzed data from four Earth system models to assess reductions in net Biome productivity (NBP) due to changes in soil moisture. The results indicated that land absorbs only half the potential carbon dioxide because of soil moisture changes. Continued extreme weather could further reduce carbon absorption, exacerbating climate change.

In what way could extreme weather events influence the Earth's hydrological cycle?

What are the potential consequences of carbon dioxide overload in the atmosphere?