Table 2.

The environmental parameters used by the 187 meteo-based thermal stress indicators. Meteo-based indicators were defined as those that can be calculated using only meteorological data (air temperature, relative humidity, wind speed, and solar radiation).

ID	Thermal Stress Indicator	First Author	Year	Unit	Temperature	Humidity	Radiation	Wind
1	Accepted Level of Physical Activity [60]	Blazejczyk	2010	W/m²	✓	✓
2	Actual Sensation Vote [61]	Nikolopoulou	2003	[-]	✓	✓	✓	✓
3	Actual Sensation Vote [62]	Nikolopoulou	2004	[-]	✓	✓	✓	✓
4	Actual Sensation Vote (Europe) [62]	Nikolopoulou	2004	[-]	✓	✓	✓	✓
5	Air Enthalpy [63]	Boer	1964	Kcal/kg	✓	✓	✓	✓
6	Apparent Temperature [64]	Almeida	2010	°C	✓	✓
7	Apparent Temperature [65]	Arnoldy	1962	°C	✓			✓
8	Apparent Temperature [66]	Fischer	2010	°C	✓	✓
9	Apparent Temperature [67]	Kalkstein	1986	°C	✓	✓
10	Apparent Temperature [68]	Smoyer-Tomic	2001	°C	✓	✓
11	Apparent Temperature (indoor) [69]	Steadman	1994	°C	✓	✓
12	Apparent Temperature (indoors) [70]	Steadman	1984	°C	✓	✓
13	Apparent Temperature (shade) [70]	Steadman	1984	°C	✓	✓		✓
14	Apparent Temperature (shade) [69]	Steadman	1994	°C	✓	✓		✓
15	Apparent Temperature (sun) [70]	Steadman	1984	°C	✓	✓	✓	✓
16	Apparent Temperature (sun) [69]	Steadman	1994	°C	✓	✓	✓	✓
17	Approximated Subjective Temperature [71]	Auliciems	2007	°C	✓	✓	✓	✓
18	Belding-Hatch Index [72]	Belding	1955	[-]	✓	✓	✓	✓
19	Belgian Effective Temperature [38]	Bidlot	1947	°C	✓	✓	✓	✓
20	Bioclimatic Index of Severity [73]	Belkin	1992	[-]	✓	✓		✓
21	Biologically Active Temperature [74]	Tsitsenko	1971	°C	✓	✓		✓
22	Biometeorological Comfort Index [75]	Rodriguez	1985	°C	✓	✓	✓	✓
23	Bodman’s Weather Severity Index [76]	Bodman	1908	[-]	✓			✓
24	Clothing Thickness	Steadman	1971	mm	✓		✓	✓
25	Comfort Vote [77]	Bedford	1936	[-]	✓	✓	✓	✓
26	Cooling Power [78]	Becker	1972	mcal/cm²/s	✓			✓
27	Cooling Power [79,80]	Bedford	1933	mcal/cm²/s	✓			✓
28	Cooling Power [79,80]	Bider	1931	mcal/cm²/s	✓			✓
29	Cooling Power [79,80]	Bradtke	1926	mcal/cm²/s	✓			✓
30	Cooling Power [79,80]	Buttner	1934	mcal/cm²/s	✓			✓
31	Cooling Power [79,80]	Cena	1966	mcal/cm²/s	✓			✓
32	Cooling Power [79,80]	Dorno	1925	mcal/cm²/s	✓			✓
33	Cooling Power [79,80]	Dorno	1934	mcal/cm²/s	✓			✓
34	Cooling Power (eq. 1) [79,80]	Goldschmidt	1952	mcal/cm²/s	✓			✓
35	Cooling Power (eq. 2) [79,80]	Goldschmidt	1952	mcal/cm²/s	✓			✓
36	Cooling Power [79]	Henneberger	1948	mcal/cm²/s	✓			✓
37	Cooling Power [76,81]	Hill	1916	W/m²	✓			✓
38	Cooling Power (eq. 1) [79]	Hill	1937	mcal/cm²/s	✓			✓
39	Cooling Power (eq. 2) [79]	Hill	1937	mcal/cm²/s	✓			✓
40	Cooling Power [79]	Lahmayer	1932	mcal/cm²/s	✓			✓
41	Cooling Power (eq. 1) [79]	Matzke	1954	mcal/cm²/s	✓			✓
42	Cooling Power (eq. 2) [79]	Matzke	1954	mcal/cm²/s	✓			✓
43	Cooling Power [79]	Meissner	1932	mcal/cm²/s	✓			✓
44	Cooling Power [82]	Vinje	1962	mcal/m²/hr	✓			✓
45	Cooling Power [79]	Weiss	1926	mcal/cm²/s	✓			✓
46	Cooling Power [82]	Angus	1930	mcal/cm²/s	✓			✓
47	Cooling Power [82]	Lehmann	1936	mcal/cm²/s	✓			✓
48	Cooling Power [82]	Joranger	1955	mcal/cm²/s	✓			✓
49	Cooling Power (Wet Air Temperature) [76,81]	Hill	1916	W/m²	✓	✓		✓
50	Corrected Effective Temperature (Basic) [71]	Auliciems	2007	°C	✓	✓	✓	✓
51	Corrected Effective Temperature (Normal) [71]	Auliciems	2007	°C	✓	✓	✓	✓
52	Dew Point [83]	Bruce	1916	°C	✓	✓
53	Discomfort Index [84]	Giles	1990	°C	✓	✓
54	Discomfort Index [79]	Kawamura	1965	[-]	✓	✓
55	Discomfort Index [79]	Tennenbaum	1961	°C	✓	✓	✓	✓
56	Discomfort Index (eq. 1) [85]	Thom	1959	[-]	✓	✓	✓	✓
57	Discomfort Index (eq. 2) [54,86]	Thom	1959	[-]	✓	✓	✓	✓
58	Discomfort Index [87]	Weather Services of South Africa	2018	[-]	✓	✓
59	Draught Risk Index [88]	Fanger	1987	% of people dissatisfied	✓			✓
60	Dry Kata Cooling [89]	Maloney	2011	W/m²	✓			✓
61	Effective Radiant Field [90]	Gagge	1967	W/m²	✓	✓	✓	✓
62	Effective Radiant Field [90]	Nishi	1981	W/m²	✓	✓	✓	✓
63	Effective Temperature [71]	Houghten	1923	°C	✓	✓
64	Effective Temperature [91]	Missenard	1933	°C	✓	✓
65	Environmental Stress Index [86]	Moran	2001	°C	✓	✓	✓
66	Equatorial Comfort Index [79]	Webb	1960	°C	✓	✓	✓	✓
67	Equivalent Effective Temperature [23]	Aizenshtat	1974	°C	✓	✓		✓
68	Equivalent Effective Temperature [92]	Aizenshtat	1982	°C	✓	✓		✓
69	Equivalent Temperature [77]	Bedford	1936	°C	✓	✓	✓	✓
70	Equivalent Temperature [93]	Brundl	1984	°C	✓	✓
71	Equivalent Warmth [77]	Bedford	1936	°C	✓	✓	✓	✓
72	Exposed Skin Temperature [94]	Brauner	1995	°C	✓			✓
73	Facial Skin Temperature (Cheek) [95]	Adamenko	1972	°C	✓			✓
74	Facial Skin Temperature (Ear Lobe) [95]	Adamenko	1972	°C	✓			✓
75	Facial Skin Temperature (Nose) [95]	Adamenko	1972	°C	✓			✓
76	Fighter Index of Thermal Stress (Direct Sunlight) [96]	Stribley	1978	°C	✓	✓	✓	✓
77	Fighter Index of Thermal Stress (Moderate Overcast) [96]	Stribley	1978	°C	✓	✓	✓	✓
78	Globe Temperature [97]	Liljegren	2008	°C	✓	✓	✓	✓
79	Heart Rate [98]	Fuller	1966	beats/min	✓	✓
80	Heart Rate Safe limit [98]	LaFleur	1971	beats/min	✓	✓
81	Heat Index [91]	Blazejczyk	2012	°C	✓	✓
82	Heat Index [99,100]	Stull	2000	°C	✓	✓
83	Heat Index [101]	National Oceanic and Atmospheric Administration	2014	°C	✓	✓
84	Heat Index [102]	Patricola	2010	°C	✓	✓
85	Heat Index [103]	Rothfusz	1990	°C	✓	✓
86	Humidex [91]	Masterson	1979	°C	✓	✓
87	Humisery [104]	Weiss	1982	°C	✓	✓		✓
88	Humiture [105]	Lally	1960	°C	✓	✓
89	Humiture [104]	Weiss	1982	°C	✓	✓
90	Humiture [106]	Hevener	1959	°C	✓	✓	✓	✓
91	Humiture revised	Wintering	1979	°F	✓	✓
92	Insulation Predicted Index [107]	Blazejczyk	2011	Clo	✓			✓
93	Integrated Index (indoor) [108]	Junge	2016	[-]	✓	✓		✓
94	Integrated Index (outdoor) [108]	Junge	2016	[-]	✓	✓	✓	✓
95	Internal Comfort Temperature [109]	Xavier	2000	°C	✓	✓	✓	✓
96	Kata Index [110]	Zhongpeng	2012	[-]	✓	✓	✓	✓
97	Mean Radiant Temperature (approximated) [111]	Ramsey	2001	°C	✓	✓	✓	✓
98	Mean Skin Temperature [112]	McPherson	1993	°C	✓
99	Meditteranean Outdoor Comfort Index [113]	Salata	2016	[-]	✓	✓	✓	✓
100	Missenard’s Index [114]	Missenard	1969	°C	✓	✓
101	Modified Discomfort Index [115]	Moran	1998	°C	✓	✓	✓	✓
102	Modified Environmental Stress Index [116]	Moran	2003	°C	✓	✓	✓
103	Natural Wet Bulb Temperature [89]	Maloney	2011	°C	✓	✓	✓	✓
104	Nett Radiation [117]	Cena	1984	W/m²	✓	✓	✓	✓
105	New Wind Chill [118]	NOAA	2001	[-]	✓			✓
106	Normal Equivalent Effective Temperature [74]	Boksha	1980	°C	✓	✓		✓
107	Operative Temperature [119]	ASHRAE	2004	°C	✓	✓	✓	✓
108	Operative Temperature [120]	ISO 7726:1998	1998	°C	✓	✓	✓	✓
109	Operative Temperature [121]	ISO 7730:1994	1994	°C	✓	✓	✓	✓
110	Operative Temperature [122]	Winslow	1937	°C	✓	✓	✓	✓
111	Outdoor Standard Effective Temperature [123]	Skinner	2001	°C	✓	✓	✓	✓
112	Oxford Index [124]	Lind	1957	[-]	✓	✓	✓	✓
113	Perceived Equivalent Temperature [125]	Monteiro	2010	°C	✓	✓	✓	✓
114	Perceived Temperature [38]	Linke	1926	°C	✓		✓	✓
115	Predicted Percentage Dissatisfied [109]	Xavier	2000	% of dissatisfied people	✓	✓	✓	✓
116	Predicted Thermal Sensation Vote [126]	Cheng	2008	[-]	✓	✓	✓	✓
117	Psychrometric Wet Bulb Temperature [127]	Malchaire	1976	°C	✓	✓	✓	✓
118	Psychrometric Wet Bulb Temperature [30]	McPherson	2008	°C	✓	✓		✓
119	Radiative Effective Temperature [128]	Blazejczyk	2004	°C	✓	✓	✓	✓
120	Radiation Equivalent Effective Temperature (Non-Pigmented) [129]	Sheleihovskyi	1948	°C	✓	✓	✓	✓
121	Radiation Equivalent Effective Temperature (Pigmented) [129]	Sheleihovskyi	1948	°C	✓	✓	✓	✓
122	Relative Humidity Dry Temperature [130]	Wallace	2005	°C	✓	✓
123	Relative Strain Index [54]	Kyle	1992	[-]	✓	✓
124	Relative Strain Index [131]	Lee	1966	[-]	✓	✓
125	Revised Wind Chill Index [132]	Court	1948	kg cal/m²/hr	✓			✓
126	Robaa’s Index [114]	Robaa	2003	[-]	✓	✓	✓	✓
127	Saturation Deficit [38]	Flugge	1912	kPa	✓	✓
128	Severity Index [129]	Osokin	1968	[-]	✓	✓		✓
129	Simple Index [86]	Moran	2001	[-]	✓	✓	✓
130	Simplified Radiation Equivalent Effective Temperature [74]	Boksha	1980	°C	✓	✓		✓
131	Simplified Tropical Summer Index [71]	Auliciems	2007	°C	✓	✓	✓	✓
132	Simplified Universal Thermal Climate Index [133]	Blazejcyk	2011	°C	✓	✓	✓	✓
133	Simplified Wet Bulb Globe Temperature [134]	American College of Sports Medicine	1984	°C	✓	✓
134	Simplified Wet Bulb Globe Temperature [30]	Gagge	1976	°C	✓	✓
135	Skin Temperature [135]	Blazejczyk	2005	°C	✓	✓	✓	✓
136	Skin Wettedness [135]	Blazejczyk	2005	[-]	✓	✓	✓	✓
137	Standard Operative Temperature [136]	Gagge	1940	°C	✓	✓	✓	✓
138	Subjective Temperature [137]	McIntyre	1973	°C	✓	✓	✓	✓
139	Sultriness Index [138]	Scharlau	1943	Torr		✓
140	Sultriness Intensity [139]	Akimovich	1971	[-]		✓
141	Summer Scharlau Index [140]	Scharlau	1950	[-]	✓	✓
142	Summer Simmer Index [141]	Pepi	1987	°C	✓	✓
143	Swedish Wet Bulb Globe Temperature [142]	Eriksson	1974	°C	✓	✓	✓	✓
144	Temperature Humidity Index [99]	Schoen	2005	°C	✓	✓
145	Temperature Humidity Index [143]	Costanzo	2006	°C	✓	✓
146	Temperature Humidity Index [144]	INMH	2000	[-]	✓	✓
147	Temperature Humidity Index [144]	Kyle	1994	°C	✓	✓
148	Temperature Humidity Index [145]	Nieuwolt	1977	°C	✓	✓
149	Temperature Humidity Index (eq. 1) [141]	Pepi	1987	°C	✓	✓
150	Temperature Humidity Index (eq. 2) [141]	Pepi	1987	°C	✓	✓
151	Temperature of the Exhaled air [112]	McPherson	1993	°C	✓	✓
152	Temperature Resultante Miniere [38]	Vogt	1978	°C	✓	✓	✓	✓
153	Temperature Wind Speed Humidity Index [146]	Zaninovic	1992	kJ/kg	✓	✓	✓	✓
154	Thermal Comfort [147]	Givoni	2000	[-]	✓		✓	✓
155	Thermal Comfort (Humid-Tropical environments) [148]	Sangkertadi	2014	[-]	✓	✓	✓	✓
156	Thermal Resistance of Clothing (1 Clothing Layer) [149]	Jokl	1982	W/m [2]/K				✓
157	Thermal Sensation [125]	Monteiro	2010	[-]	✓	✓	✓	✓
158	Thermal Sensation (eq 1.) [150]	Rohles	1971	[-]	✓	✓
159	Thermal Sensation (eq. 2) [151]	Rohles	1971	[-]	✓	✓
160	Thermal Sensation [152]	Givoni	2004	[-]	✓		✓	✓
161	Thermal Sensation Index [109]	Xavier	2000	[-]	✓	✓	✓	✓
162	Thermal Sensation Vote (Summer) [153]	Yahia	2013	[-]	✓	✓	✓	✓
163	Thermal Sensation Vote (Winter) [153]	Yahia	2013	[-]	✓	✓	✓	✓
164	TPV index (Baghdad) [72]	Nicol	1975	[-]	✓	✓	✓	✓
165	TPV index (Roorkee) [72]	Nicol	1975	[-]	✓	✓	✓	✓
166	Tropical Summer Index [154]	Sharma	1986	°C	✓	✓	✓	✓
167	Universal Thermal Climate Index [155]	Jendritzky	2012	°C	✓	✓	✓	✓
168	Wet Bulb Globe Temperature (eq. 1) [156]	Ono	2014	°C	✓	✓	✓	✓
169	Wet Bulb Globe Temperature (eq. 2) [156]	Ono	2014	°C	✓	✓	✓	✓
170	Wet Bulb Globe Temperature (indoors)[appr:30]	Yaglou	1956	°C	✓	✓		✓
171	Wet Bulb Globe Temperature (outdoors) [appr:30]	Yaglou	1956	°C	✓	✓	✓	✓
172	Wet Bulb Temperature [97]	Liljegren	2008	°C	✓	✓	✓	✓
173	Wet Bulb Temperature [127]	Malchaire	1976	°C	✓	✓	✓	✓
174	Wet Bulb Temperature [157]	Stull	2011	°C	✓	✓
175	Wet Cooling Power [79]	Landsberg	1972	mcal/cm²/s	✓	✓	✓	✓
176	Wet Globe Temperature (Botsball)[[appr:158]]	Botsford	1971	°C	✓	✓	✓	✓
177	Wet Kata Cooling [89]	Maloney	2011	W/m²	✓	✓	✓	✓
178	Wet Kata Cooling Power [112]	Chamber of Mines of South Africa	1972	mcal/cm²/s	✓	✓	✓	✓
179	Wet Kata Cooling Power [159]	Krisha	1996	W/m²	✓	✓	✓	✓
180	Wet Kata Cooling Power [160]	Hill	1919	mcal/cm²/s	✓	✓		✓
181	Wet-Bulb Dry Temperature [130]	Wallace	2005	°C	✓	✓	✓	✓
182	Wind Chill [161]	OFCM/NOAA	2003	°C	✓			✓
183	Wind Chill [162]	Siple	1945	kg cal/m²/hr	✓			✓
184	Wind Chill [163]	Steadman	1971	cal/m²/s	✓	✓	✓	✓
185	Wind Chill Equivalent [164]	Quayle	1998	°C	✓			✓
186	Wind Chill Equivalent Temperature (wind of 1.34 m/s) [165]	Falconer	1968	°C	✓			✓
187	Winter Scharlau Index [140]	Sharlau	1950	[-]	✓	✓

Notes:
[-] no unit available for this thermal index
✓ environmental parameter required for the calculation of this thermal index
[cit:] no original article found; the equation for the identified thermal index was found in the cited publication
[appr:] the current index requires specialized equipment; an equation found in the cited publication was used for its approximation
Information on complex parameters used for the computation of some thermal indices.
In case where the calculation of a thermal index requires any of the following parameter, that parameter was translated as follows:
	Temperature	Humidity	Radiation	Wind
Mean Radiant Temperature (approximated). Proper measurement considers short- and long-wave radiation.	✓	✓*	✓	✓
Dew point	✓	✓
Wet Bulb Temperature	✓	✓	✓	✓*
Globe Temperature	✓	✓	✓	✓*
Vapor Pressure	✓	✓
Saturated Vapor Pressure	✓
Wet Bulb Globe Temperature	✓	✓	✓	✓
Psychrometric Wet Bulb Temperature	✓	✓	✓
*indirect use of a parameter incorporating that factor