I have been very hesitate to get into this topic too much. Let me state that I DO NOT know all the pieces to this puzzle, but going off what I saw on TV and heard from several other turf professionals.
I think WAY TOO much is being made of the weather, the week leading into the OPEN. There was 5 days of 92-101 degrees, with nighttime lows of 67-78 degrees during the same stretch. Keep in mind, the staff at Congo are on wilt watch from June-September, where there temps can be suffocating for bentgrass. I’d have to think that they were prepared for the warm weather-They had a closed golf course, I’m sure they’re chemical and fertilizer applications were spot on and ALL the labor/handwaterers that they needed. I, personally, do not believe that that 5 day stretch caused the condition issues. If all it takes is 5 days, how can that staff ever expect to make it through a summer? Many of the green sites had fans set up until Wednesday night, also. Those guys are at the courses that they are at because they are among the best in the Mid-Atlantic region.
I think all the talk of the use of Sub Air and it’s perception of being bulletproof is a joke. It is a tool, just like fans are. Just because you have a Sub Air system, does not mean that you’re going to have firm surfaces every day because they were run all night. There are other sub surfaces “air conditioners” that do a variety of different things, not just pull moisture. Precision Aire, which Southern Hills has, Alotian Club, and TPC can cool AND heat roots, along with pulling moisture. Hopefully, more Superintendents and Memberships will look into this product, as it seems to be more versatile. I’m sure you can remember how good Southern Hills’ greens were in 2007 for the PGA, when the temperatures were 100+ for the entire week, and that was after 2.5 months of heat and humidity prior.
If we remember, last summer was BRUTAL for the northeast and the Mid-Atlantic, less than a year after regrassing the greens. (2009) Last summer could not have been a good summer to strengthen that plant, build roots and a dense turf. Lastly, those greens are 18 months old, being mowed and rolled 2 or 3x daily. Mowing heights under .100” for that period of time, being such a juvenile plant is what I believe caused the thinning that we saw, NOT the 5 days of heat and humidity.
If all it took was 5 days of heat and humidity, you’ve never seen bentgrass south of Chicago….