scholarly journals Comparison of WBGTs over Different Surfaces within an Athletic Complex

Medicina ◽  
2020 ◽  
Vol 56 (6) ◽  
pp. 313
Author(s):  
Andrew Grundstein ◽  
Earl Cooper
Keyword(s):  
Monitoring Site ◽  
Subtropical Climate ◽  
Sensible Heat ◽  
Artificial Turf ◽  
Wet Bulb Globe Temperature ◽  
University Of Georgia ◽  
Dewpoint Temperature ◽  
Microclimatic Conditions ◽  
Globe Temperature ◽  
The University

Many athletic governing bodies are adopting on-site measurement of the wet-bulb globe temperature (WBGT) as part of their heat safety policies. It is well known, however, that microclimatic conditions can vary over different surface types and a question is whether more than one WBGT sensor is needed to accurately capture local environmental conditions. Our study collected matched WBGT data over three commonly used athletic surfaces (grass, artificial turf, and hardcourt tennis) across an athletic complex on the campus of the University of Georgia in Athens, GA. Data were collected every 10 min from 9:00 a.m. to 6:00 p.m. over a four-day period during July 2019. Results indicate that there is no difference in WBGT among the three surfaces, even when considered over morning, midday, and afternoon practice periods. We did observe microclimatic differences in dry-bulb temperature and dewpoint temperature among the sites. Greater dry-bulb and lower dewpoint temperatures occurred over the tennis and artificial turf surfaces compared with the grass field because of reduced evapotranspiration and increase convective transfers of sensible heat over these surfaces. The lack of difference in WBGT among the surfaces is attributed to the counterbalancing influences of the different components that comprise the index. We conclude that, in a humid, subtropical climate over well-watered grass, there is no difference in WBGT among the three athletic surfaces and that, under these circumstances, a single monitoring site can provide representative WBGTs for nearby athletic surfaces.

Wet Bulb Globe Temperature Use in National Collegiate Athletic Association Football Bowl Subdivision Athletic Training Staffs

2020 ◽  
Vol 25 (6) ◽  
pp. 314-317
Author(s):  
Garrison A. Chan ◽  
Dale R. Wagner
Keyword(s):  
Athletic Training ◽  
National Collegiate Athletic Association ◽  
Athletic Trainers ◽  
Geographical Location ◽  
Football Bowl Subdivision ◽  
Wet Bulb Globe Temperature ◽  
Association Football ◽  
National Athletic Trainers Association ◽  
Globe Temperature ◽  
The University

Heat illnesses present a risk for athletes, especially football players. The National Athletic Trainers’ Association established recommendations to prevent heat illnesses, which include measuring wet bulb globe temperature (WBGT). This study aimed to determine the prevalence of WBGT use among the 130 National Collegiate Athletic Association Football Bowl Subdivision athletic training staffs. Of 82 respondents, 59 use WBGT to assess heat stress. The majority of Football Bowl Subdivision training programs (72% of respondents) use the WBGT, but adherence to this National Athletic Trainers’ Association recommendation varies throughout the season (practice versus games) and is likely influenced by the geographical location of the university.

Can a local weather station be used in place of on-site measurements for heat stress assessment in a sports setting?

2021 ◽  
Author(s):  
Olivia Cahill ◽  
Andrew Grundstein ◽  
Christian Walker ◽  
Earl Cooper
Keyword(s):  
Heat Stress ◽  
Research Question ◽  
Health And Safety ◽  
Subtropical Climate ◽  
Wet Bulb Globe Temperature ◽  
Playing Field ◽  
Weather Stations ◽  
Globe Temperature ◽  
Set Up ◽  
Local Weather

<p>Across the globe, exposure to environmental heat stress may impose increased health and safety hazards to active populations such as athletes and workers. Monitoring heat stress is a key component of a well-designed heat mitigation policy. Yet, the cost of several hand-held heat stress sensors may pose a financial barrier for use in many circumstances. Numerous areas, however, have existing networks of weather stations that could potentially be incorporated into monitoring heat stress. Currently, the Japanese Ministry of the Environment has set up a network of weather stations across the city to monitor environmental conditions in preparation of the 2021 Tokyo Olympic and Paralympic games. Our research question asks how representative are the values recorded at local weather stations (often located over a natural surface) to playing field conditions with various surfaces and microclimate conditions. In the U.S. the WeatherSTEM network has over 600 stations scattered across the country and measures a suite of variables relevant to heat stress including air temperature, humidity, wind speed, solar radiation and models the wet bulb globe temperature (WBGT) values. This study will compare measurements from a local WeatherSTEM station with on-site measurements taken over three different playing surfaces (grass, synthetic turf, and hardcourt tennis) in a humid subtropical climate in Athens, Georgia. U.S. It will also compare WBGT values computed using different models. Our results may provide insight not only for sports but also for the workplace which take place over various surface types and environments.</p>

Heat island mitigation using water retentive pavement sprinkled with reclaimed wastewater

2008 ◽  
Vol 57 (5) ◽  
pp. 763-771 ◽  
Author(s):  
H. Yamagata ◽  
M. Nasu ◽  
M. Yoshizawa ◽  
A. Miyamoto ◽  
M. Minamiyama
Keyword(s):  
Heat Flux ◽  
Urban Areas ◽  
Sensible Heat Flux ◽  
Heat Island ◽  
Temperature Decrease ◽  
Sensible Heat ◽  
Reclaimed Wastewater ◽  
Wet Bulb Globe Temperature ◽  
The Road ◽  
Globe Temperature

In Japan, reclaimed wastewater has been recycled widely for non-potable urban applications and it is to be used for sprinkling roads to mitigate heat island in urban areas. To assess the heat island mitigation effects of the sprinkling reclaimed wastewater on water retentive pavement, we carried out a survey at Shiodome-District, Tokyo. The temperatures of air and roads, humidity, and WBGT (Wet-bulb globe temperature) were measured and heat flux was estimated to compare the condition of the areas with/without sprinkling. The following results were obtained. 1) Sprinkling reclaimed wastewater decreased the road surface temperature by 8 degrees during the daytime and by 3 degrees at night: temperatures equal to those on planting zones. Nevertheless sprinkling was done only in the daytime, the temperature decrease effect was not only obtained during the daytime: it continued through the night, due to the water retentive pavement. 2) Sprinkling reclaimed wastewater reduced the amount of sensible heat flux and increased that of latent heat flux. These results suggest that sprinkling reclaimed wastewater on water retentive pavement can effectively mitigate the heat island phenomenon.

scholarly journals Determination Of Heat Load By Wet Bulb Globe Temperature In Working Environment

2015 ◽  
Vol 66 (1) ◽  
pp. 85-89
Author(s):  
Ružena Králiková ◽  
Marieta Maďoranová
Keyword(s):  
Thermal Load ◽  
Working Environment ◽  
Human Organism ◽  
Surrounding Area ◽  
Work Activities ◽  
Wet Bulb Globe Temperature ◽  
Hot Environment ◽  
Microclimatic Conditions ◽  
Globe Temperature

Abstract Thermal load on people in general depends on the heat production in the human organism as a result of physical activity as well as environmental conditions which are affected by transfer of heat between human and the surrounding area. The resulting effect of metabolic exchanges which occur in work activities is the thermal load of organism. The paper deals with the evaluation of microclimatic conditions of the working environment of workers, who are exposed to the hot environment during their work.

EFFECTS OF INONIZING RADIATION CAUSED HEAT STRESS ON THE HUMAN BODY FOR STANDARD ISO 7243

2013 ◽  
pp. 47-57
Author(s):  
Van Trong Le ◽  
Thi Tuyet Mai Nguyen ◽  
Thi Xuan Duyen Nguyen ◽  
Ba Luan Nguyen ◽  
Tuyen Pham ◽  
...  
Keyword(s):  
Heat Stress ◽  
Risk Assessments ◽  
Management Systems ◽  
Temperature Index ◽  
Wet Bulb Globe Temperature ◽  
Simple Index ◽  
Simple Tool ◽  
Results Management ◽  
Globe Temperature ◽  
Hot Environments

Objectives: Presents heat stress Standard ISO 7243, which is based upon the wet bulb globe temperature index (WBGT), and considers its suitability for use worldwide. Materials and Methods: The WBGT index are considered and how it is used in ISO 7243 and across the world as a simple index for monitoring and assessing hot environments. Results: Management systems, involving risk assessments, that take account of context and culture, are required to ensure successful use of the standard and global applicability. For use outdoors, a WBGT equation that includes solar absorptivity is recommended. A ‘clothed WBGT’ is proposed to account for the effects of clothing. Conclusion: ISO 7243 is a simple tool to assess the heat stress and may be applicated worldwide.

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