Weather in Tarn-Góry

EXPOSURE OF THE HUMAN BODY TO THE SUN WITH UV ULTRAVIOLET RADIATION

MEASUREMENTS OF THE ULTRAVIOLET RADIATION INDEX UVI and EXPOSURE TIME Tnaśw=f(UVI), using the main sensor No. U7, type LTR390

GENERAL DATA		UVI INTENSITY INDEX MEASUREMENTS, using main sensor No. U7 type LTR390, and EXPOSURE TIME Tnaśw = f(UVI)
Number of all measurements : 30727		Last measurement: 2024-11-23, 15:19			Current time
		Current UV Index [UVI]			Current exposure time [min]
		0.00	Niski	2 and less	347
				3 - 5
				6 - 7
				8 - 10
				11 and more, up to 16
		M = MAX Index UV [UVI]			MAX exposure time [min]
		M = 6.79, on: 2024-07-13 13:00			30
		Measurements and charts from the "Meteo Station" of the Faculty of Physics of the Warsaw University of Technology
		Index UV
		data is updated every 5 minutes
Measurement period [year-month]	Number of intensity measurements UV	AVERAGE UVI INTENSITY AND EXPOSURE TIME IN A GIVEN MEASURING PERIOD
		MEDIUM UV Index [UVI]			AVERAGE exposure time [min]
2024-04	168	0.93			303
2024-05	5542	0.58			320
2024-06	5649	0.48			324
2024-07	5632	1.32			285
2024-08	5052	1.46			278
2024-09	4209	1.45			279
2024-10	3902	1.30			286
2024-11	573	1.43			280

Table 1. Monthly averaged measurements of UV intensity [UVI] and exposure times [min]

DANE OGÓLNE		ZAGREGOWANE POMIARY INDEKSU NATĘŻENIA oraz CZASÓW NAŚWIETLANIA Tnaśw=f(UV) [min.]
Ilość wszystkich pomiarów : 30727		M = MAX index [UVI]	MAX czas naświetlania [min]
		6.79	30
Measurement period [year]	Number of intensity measurements UV	AVERAGE UV INTENSITY AND EXPOSURE TIME IN A GIVEN MEASURING PERIOD
		MEDIUM UV Index [UVI]	AVERAGE exposure time [min]
2024	30727	1.07	297

Table 2. Annual averaged measurements of UV intensity [UVI] and exposure times [min]

MEASUREMENTS OF UVI RADIATION INDEX and EXPOSURE TIME using a UV sensor
1. UV sensor. Measurement UV [UVI]
2. UV sensor. Measurement UVAB [UVI]
3. UV sensor UV-UVAB. Measurement UV [UVI] and UVAB [UVI]

 

MEASUREMENTS OF UV RADIATION, EXPOSURE DOSES and SUNLIGHT (LUX), using the main sensor No. U7, type LTR390
1. UV and Exposure Doses Measurements
2. UV and Sunlight Measurements
3. UVmax and Sunlight measurements
4. Meteorological measurements for the UV measurement station - collective
OTHER MEASUREMENTS
1. MEASUREMENTS OF UVI RADIATION INDEX and EXPOSURE TIME, using additional sensor No. U10, type LTR390
2. MEASUREMENTS OF UVI RADIATION INDEX and EXPOSURE TIME, on the northern side of the sky, using sensor No. U11, type LTR390
3. Collective UV and Sunlight measurements for sensors No.: U7, U10, U11
4. Environmental measurements for the measurement station in Strzybnica

Heliotherapy is a type of phototherapy, i.e. treatment with sunlight, already known to ancient civilizations, including: in Greece, Egypt and Rome, It involves light treatment through direct exposure to natural sunlight. They were commonly used in cases of skin inflammation, to nourish body tissues, as well as muscle pain and chronic respiratory catarrh.

Modern phototherapy has become popular, especially since the end of the 19th century. Skin diseases such as psoriasis, acne vulgaris, eczema and difficult-to-heal wound infections, such as those resulting from smallpox infection, were particularly eagerly treated with light. Light therapy was also commonly recommended for disorders of the circadian rhythm of sleep and wakefulness and for seasonal depression, i.e. seasonal affective disorder. Sunny weather has a healing, relaxing and antidepressant effect on the human body. In summer, the percentage of common viral and bacterial infections decreases because UV radiation penetrates the pathogens' envelopes and has a natural bactericidal effect.

Experts recommend exposing your body in the summer for an average of 5 to 30 minutes, at least twice a week. It is also worth remembering that the darker the skin and the weaker the sunlight, the more minutes of exposure time are needed. Read more about this topic here.

A very important effect of spending time in the sun is the stimulation of the production of vitamin D3, i.e. cholecalciferol. Vitamin D3 precursor compounds present in the epidermal layer are transformed as a result of the action of solar ultraviolet UV radiation, thanks to which a cyclic, active structure of this vitamin is created. It has been shown that small, but health-sufficient amounts of cholecalciferol can be produced even with moderate skin exposure, depending on the intensity of ultraviolet UV radiation.

 

According to scientists from British universities, only vitamin D3 stimulates the immune system, which we obtain mainly from animal foods (fatty fish, fish oils, liver, egg yolks, butter) and is produced in our skin under the influence of sunlight. As prof. says Colin Smith, lead author of the study, only vitamin D3 stimulates the interferon I signaling pathway in the body. It is a key part of the immune system that provides the first line of defense against bacteria and viruses. So proper levels of vitamin D3 can help prevent infections. Read more about this topic here.

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This website presents measurements of UV radiation intensity and corresponding exposure time for skin that has not been previously exposed to tanning. It is best to perform skin irradiation in the afternoon, i.e. from 11:00 a.m. to 1:00 p.m. The exposure time is calculated based on the formula:

Where:

UV - current UV radiation intensity in [UVI] units during skin exposure,

M - maximum UV intensity [UVI], on the summer solstice, at sunny noon.

Solar ultraviolet UV radiation intensity measurements in the charts and tables on this website are given in units of [UVI]. UVI is a unit of measurement of UV radiation relating to its impact on human skin, causing skin erythema. The range of UVI Index values ​​extends from zero and above. The higher the UVI value, the greater the probability of skin erythema and burns and the faster the time of their appearance. Read more about this topic here.

Downloads:
1. UV radiation units and exposure time
2. UV radiation theory
3. Amateur UV measuring device
4. UV radiation and human health
5. Gamma radiation theory and measurements