Executive Summary
Our review of Singh et al. 2024 covered how much hotter synthetic turf runs compared to natural grass. This study, from Penn State University’s Center for Sports Surface Research, asks the practical follow-up question: once you know a field runs hot, what can you actually do about it? Researchers A.S. McNitt, D.M. Petrunak, and T.J. Serensits tested several cooling strategies, including irrigation, tarping, and an infill amendment designed to hold more water, to see which ones meaningfully reduced surface temperature, and for how long.
Key Findings
- The scale of the problem this study set out to address is significant: the researchers cite prior reports of synthetic turf surface temperatures running 35–60°C higher than natural grass, with one extreme case reaching 93°C when air temperature was only 37°C.
- Irrigation and tarping regimes were initially effective, several of the tested approaches successfully brought surface temperature down to match natural turfgrass levels immediately after application.
- The cooling effect did not last long enough to cover a full sporting event. Temperatures began rebounding toward pre-treatment levels within a relatively short window, meaning irrigation works as a pre-game or periodic cooling strategy, not a sustained fix.
- Irrigated surfaces still measured meaningfully cooler than untreated surfaces several hours later, even after accounting for rebound, irrigation isn’t a permanent solution, but it isn’t negligible either.
- Amending infill with calcined clay (to increase water-holding capacity for evaporative cooling) was tested as a longer-lasting alternative to simple irrigation, aimed at extending the cooling window.
Important Limitations
- This research is from 2008 and was conducted on synthetic turf systems and infill technologies of that era. Cooling-oriented infill and fiber technologies covered in our Infill Options article have advanced significantly since this study was conducted, and weren’t part of what was tested here.
- Results are specific to the field, climate, and conditions tested at Penn State’s research facility on a given day, actual cooling duration will vary by climate, humidity, sun angle, and specific system.
- Water usage and cost were not the focus of this study, irrigation as a cooling strategy has real water-consumption implications worth weighing separately, particularly in drought-prone regions.
- This is a field-based applied study, not a large-scale randomized trial, findings are directionally useful but shouldn’t be read as precisely quantified guarantees for any specific field.
Why This Matters
This study is a useful, practical complement to the broader heat research in this library: it confirms that mitigation strategies genuinely work, just not permanently. For field owners and facility managers, the actionable takeaway is that irrigation is a legitimate, evidence-backed tool for managing surface heat around specific windows, pre-game, during breaks, or ahead of peak-heat practice times, rather than something that needs to run continuously to matter.
Act Global Perspective
This foundational research is consistent with what we tell field owners directly: heat management is a combination of strategies, not a single fix. Irrigation has a real, evidence-backed but temporary effect; infill and fiber selection (covered in our Infill Options article) offers a more built-in, longer-term approach; and scheduling around peak solar hours remains one of the most effective tools regardless of system. We think field owners get the best outcome by treating these as complementary tools specified together at the design stage, not as a single silver-bullet decision.
Related Resources
- Surface Temperature and Heat Stress — Review of Singh et al. 2024
- Surface Heat & Temperature — What the Research Actually Shows
- Infill Options & Environmental Considerations
Access the Original Study
This review is Act Global’s independent summary of publicly available research, prepared for educational purposes. Act Global does not host or reproduce the original article. Read the full study directly from the publisher:
- McNitt AS, Petrunak DM, Serensits TJ. “Temperature Amelioration of Synthetic Turf Surfaces Through Irrigation.” Acta Horticulturae, 783:573–582, 2008 (Proceedings of the 2nd International Conference on Turfgrass Science and Management for Sports Fields). DOI: 10.17660/actahortic.2008.783.59
- Penn State Center for Sports Surface Research: plantscience.psu.edu/research/centers/ssrc
This is an Act Global Research Review, an independent interpretation of publicly available research prepared for educational purposes only. It does not constitute medical, legal, or engineering advice.
