Fix typo per Oli's review

README.md

@@ -10,7 +10,7 @@ Ai2 Climate Emulator (ACE) is a family of models designed to simulate atmospheri
 
 **Disclaimer: ACE models are research tools and should not be used for operational climate predictions.**
 
-ACE2-SOM is the first model we have trained to emulate the sensitivity of climate to substantial increases in carbon dioxide.  It consists of ACE2 coupled to a highly simplified physics-based ocean mode, called a slab ocean model (SOM), and is trained on equilibrium-climate output from GFDL's SHiELD model coupled to an identical slab ocean with carbon dioxide concentrations of the present-day, double the present-day, and quadruple the present-day (1xCO2, 2xCO2, and 4xCO2).
+ACE2-SOM is the first model we have trained to emulate the sensitivity of climate to substantial increases in carbon dioxide.  It consists of ACE2 coupled to a highly simplified physics-based ocean model, called a slab ocean model (SOM), and is trained on equilibrium-climate output from GFDL's SHiELD model coupled to an identical slab ocean with carbon dioxide concentrations of the present-day, double the present-day, and quadruple the present-day (1xCO2, 2xCO2, and 4xCO2).
 
 Quick links:
 - 📃 [Paper (pre-print coming soon)]()