" In warm climates, increased heat and humidity can used your skin to sweat, leaving you more prone to breakouts, especially if your skin is oily. Using a cleanser with salicylic acid can dry up some of the oil, but it can also make your skin more sensitive to sunlight, so use caution and apply these products at night. "
Source: Goins
http://www.webmd.com/beauty/skin/summer-skin-survival-guide
http://bit.ly/1PBCwYP etc., there are plenty of resources that deal with this question.
skin colour and tone for sure but more important is our performance which is also affected by the climate
Weather and climate affect skin color. They are the environmental variables that have effects on some traits that are controlled by polygenes or more than a pair of alleles. So skin color shows CONTINUOUS VARIATION, with intermediate phenotypes, unlike characteristics like blood group (showing discontinuous variation) that does not have intermediates.
Of course they have strong influence. Compare the skin of fishermen and people living in cities.
Send a person to work in the warm and humid sunshine for long, tie the person with sweating labour, and don't give her/him cosmetics. I think we may get the answer.
Regards
Dear Colleagues,
Good Day,
..."Weather, for one, has a huge effect on our skin. When it’s too hot or dry outside, our skin lets us know it. The winter months bring harsh, cold winds that irritate the delicate skin on our face and hands. Winter also brings dry conditions that strip skin of its natural moisture. This dryness can lead to red patches and excess dead skin cells that clog pores, causing acne. According to some skin-care experts, winter is the worst season for acne. It’s unclear whether these breakouts are due to the weather alone, or are an indirect effect of all the lotions we apply to counteract wintry conditions.
For many, summer brings the promise of clear, easy-to-manage skin. The humidity of summer softens skin and brings back the moisture lost in winter. Some people attribute their improved complexions to increased sun exposure, but the American Dermatological Association says there is no evidence to substantiate this claim. In fact, dermatologists advise patients taking acne medication to avoid the sun’s rays when possible, as many of these drugs increase sensitivity to ultraviolet radiation, which can lead to skin cancer.
Moreover, not everyone says summer helps their skin. Acne has the potential to get worse as the weather gets hotter. There are several explanations for why this happens. For one, excess heat and humidity increase sweat production, which means more oil available to clog pores. Also, summer activities – such as hanging out in swimming pools – can have negative effects on our skin. Chlorinated chemicals can cause a particularly bad form of acne called chloracne. Additionally, sunscreens, while great for protecting users from UV rays, can aggravate the skin, which is why many dermatologists recommend oil-free varieties for patients prone to acne flare-ups.
Extreme heat and humidity can also facilitate bacterial and fungal infections. In the Vietnam War, dermatological problems accounted for 12 percent of outpatient cases, according to one report (pdf). Many of these cases involved bacterial and fungal infections, which the doctors involved blamed on Vietnam’s muggy climate. They reported a high incidence of the bacterial infection impetigo and tinea pedis, a fungal infection more commonly known as athlete’s foot. In addition, numerous soldiers contracted a condition called tropical acne that only occurs in especially hot and humid areas. Tropical acne is a lot like regular acne but much more painful: many of the soldiers who had it were physically unable to carry their backpacks."....
Please, see the links for detail....
http://scienceline.org/2007/07/ask-westly-skinweather/
http://health.howstuffworks.com/skin-care/beauty/skin-and-lifestyle/climate-affect-skin.htm
https://www.quora.com/Why-do-people-in-cold-countries-have-fair-complexion-while-the-ones-in-hot-countries-have-dark
http://www.mybodybeautiful.co.uk/Beauty/Skin/Skin%20Factors.htm
" In warm climates, increased heat and humidity can used your skin to sweat, leaving you more prone to breakouts, especially if your skin is oily. Using a cleanser with salicylic acid can dry up some of the oil, but it can also make your skin more sensitive to sunlight, so use caution and apply these products at night. "
Source: Goins
http://www.webmd.com/beauty/skin/summer-skin-survival-guide
The answer is yes. Skin consists of melanocytes that respond very sharply to light spectrum (UV) depending on the geographical exposure. The tone is also effected by geographic variables like temperature, humidity atmospheric pressure.
The skin though impermeable to some factors maintains constant equilibirium with surrounding environment.
Edit: however the genetic base colour of visible skin can revert back, certain long term conditions / medications may induce irreversible colour changes (darkening /lightening) e.g vitiligo etc.
Yes definitely they affect skin color. Consider India(6.74 N to 35.67 N), one of the most diversified nations of the world. In the south Indian states such as Kerala and Tamilnadu which experience a subtropical climate, the skin color of people are darker as compared to northen states like Jammu and Kashmir. The northen states experience a weather equivalent to China. Again in the northen states, most of the areas are hilly areas. So these places are at a higher altitude than other parts of India and this reason also makes these places cooler than other parts of India. So if we travel from south to north India, we will find a variety of skin colors. This is only the story of India. If we consider the whole world, we will get huge amount of data that will support my idea. Also the temperature and humidity affects the production of melanin in skin which in turn affects the skin color.
I don't think that weather & climate affect our skin colour & tone significantly. Close to where I live is a refugee camp which contains a lot of black- or dark- colored people whose ancestors came to Palestine centuries ago from Africa but their colors did not change. A village, which is about 10 kilometers far from where I live, is inhabited by people who mostly had European ancestors (also since centuries ago) & they are still white & blonde in colors.Had there been an effect of more than the Sun tan, their colors would have changed to off-white (as most original Palestinians are).
The color selection of genes one would assume maybe based on successful survival of chance variables in climate band latitudes.
The climate variable of successfull BLEND IN into the native topology might be the main driving factor for these variants. e.g tree moths adapted to colour surrounds in nature.
In winters, you wear a lot of clothes and u are covered totally (which results in less UV exposure) u ends up having a lighter tone than of summer b'coz u wear comaparatievely less clothes in summer, hence being prone to UV exposure!
Not that the Climate has any effect on your skin color or tone!
Weather, for one, has a huge effect on our skin. When it’s too hot or dry outside, our skin lets us know it. The winter months bring harsh, cold winds that irritate the delicate skin on our face and hands. Winter also brings dry conditions that strip skin of its natural moisture. This dryness can lead to red patches and excess dead skin cells that clog pores, causing acne.
For many, summer brings the promise of clear, easy-to-manage skin. The humidity of summer softens skin and brings back the moisture lost in winter. Some people attribute their improved complexions to increased sun exposure.
Moreover, not everyone says summer helps their skin. Acne has the potential to get worse as the weather gets hotter. There are several explanations for why this happens. For one, excess heat and humidity increase sweat production, which means more oil available to clog pores.
Extreme heat and humidity can also facilitate bacterial and fungal infections.
http://scienceline.org/2007/07/ask-westly-skinweather/
Actually, evidence from a recent study strongly suggests that skin color is linked to the consumption of meat. That is not to say that eating a lot of meat will quickly darken your complexion. It appears that humans get a lot of vitamin D from meat and seafood. The study found that there is a link between the gene for light skin and the advent of agriculture in Europe. Here is a popular link http://www.sciencemag.org/news/2014/01/how-farming-reshaped-our-genomes. Sorry, cannot find the actual study. From what I remember reading, a chemical in the body helps process vitamin D from meat and seafood. When farming began, the intake of vitamin D decreased and eventually there was change in the genes which reduced this chemical in European farming communities. This genetic change did not occur in stable populations dependent on meat and seafood. Thus the North and South American native tribes, who only practiced farming for the last 5,500 years or so in SA, to the last ca. 2,000 years in NA, retained their coloration. You will note that the Eskimos, Aleuts, and Laplanders all have darker skin pigmentation even though they live far from the equator. This is attributed to the high intake of vitamin D in their diets from meats and seafood.
Dear Colleagues,
Good Day,
....... "Geographic variation
Approximately 10% of the variance in skin color occurs within regions, and approximately 90% occurs between regions. Because skin color has been under strong selective pressure, similar skin colors can result from convergent adaptation rather than from genetic relatedness; populations with similar pigmentation may be genetically no more similar than other widely separated groups. Furthermore, in some parts of the world where people from different regions have mixed extensively, the connection between skin color and ancestry has substantially weakened. In Brazil, for example, skin color is not closely associated with the percentage of recent African ancestors a person has, as estimated from an analysis of genetic variants differing in frequency among continent groups.
In general, people living close to the equator are highly darkly pigmented, and those living near the poles are generally very lightly pigmented. The rest of humanity shows a high degree of skin color variation between these two extremes, generally correlating with UV exposure. The main exception to this rule is in the New World, where people have only lived for about 10,000 to 15,000 years and show a less pronounced degree of skin pigmentation.
In recent times, humans have become increasingly mobile as a consequence of improved technology, domestication, environmental change, strong curiosity, and risk-taking. Migrations over the last 4000 years, and especially the last 400 years, have been the fastest in human history and have led to many people settling in places far away from their ancestral homelands. This means that skin colors today are not as confined to geographical location as they were previously."....
Please, see the link for more information
https://en.wikipedia.org/wiki/Human_skin_color
I thought we had overcome Humboldt's idea of "human geography", a conceptual basis for racism, among other bad things, dear Markovic...! If what you mean in just how can sunny weather affect me or you on the beach, well, evidently: that's what sun-blocking lotions were invented for.
Where sun shine is more, skin colour is dark; Where sun shine is low, skin colour is white!
When we look geographically we observe that in the areas near the equator and those areas where the sun shines more and the conditions are hot and humid there the skin colour is dark and in the colder areas or where the sun shine is low the skin colour is white.
But maybe the genetic make up also decides the skin colour. Otherwise anyone who has a darker skin colour can become fairer by residing in a colder climate.
The first humans (H. sapiens) appeared in East Africa with dark skin (like modern Ethiopians) and moved north where the sun is weaker, so their skin colour turned lighter.
This theory has a recent confirmation from studies between strength of uv and skin colour.
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