Contact Us

Use the form on the right to contact us.

You can edit the text in this area, and change where the contact form on the right submits to, by entering edit mode using the modes on the bottom right. 

One Shields Avenue
Davis CA

Global Change in Aridlands

Our global change research is motivated by the fact that aridlands[1] span diverse ecosystems on all continents, comprising over 40% of Earth’s terrestrial surface (i.e., 6.1 Bn ha), 44% of all cultivation, and one-third of the human population. Aridlands are also where impacts from climate change are expected to be relatively severe (e.g., California, Mexico, sub-Saharan Africa) compared to other global regions. Unfortunately, aridlands, especially aridland soils, remain vastly understudied relative to their area.


[1] Here, we define aridlands using the United Nations Environment Program Aridity Index (AI), where AI = Mean Annual Precipitation / Mean Annual Potential Evapotranspiration, and according to hyperarid (AI < 0.03, 7.5%), arid (0.03 – 0.2, 12.1%), semiarid (0.2 – 0.5, 17.7%), and dry sub-humid (0.5 – 0.65, 9.9%) climate classes (AI values, % global land area).