A new study has demonstrated the regenerative effect that solar farms can have on degraded and depleted land, by sheltering it from harsh winds, pushing down surface and soil temperatures, and boosting soil moisture.
The study, published in the journal Geography and Sustainability, synthesises 147 individual studies on a range of different land types and across a range of climate variables, to see how solar farms interact with their immediate environment.
“Unlike the pollutant-dominant environmental impacts of fossil fuels, solar power exerts climate- and ecology-dominant influences on the entire environment,” the study finds.
“By changing land surface radiative properties, solar photovoltaic (PV) systems create new energy interaction interfaces with original ecosystems, thereby modifying land surface processes and associated climate variables.”
Across the 147 total studies analysed in the report’s meta-analysis, 609 solar farms were examined, the vast majority of which were located in the Northern Hemisphere, with the largest number in China (316), the United States (104), and India (44). This is consistent with their global rankings as the top three countries in terms of installed solar PV capacity.
Local details matter for things like this. Even if this is true in general, do not assume it will be true for your particular area. Sometimes it can even be true for your next door neighbor and not for you.
Local soils have a lot of small variation and those sometimes matter a lot.