A hot summer’s day, the hottest month in years, or the coldest?
Well, the answer depends on where you live, according to a new study.
Researchers at Columbia University in New York and Stanford University in California used data from a variety of sources to examine how many people in the United States are currently exposed to the sun’s radiation.
The researchers measured how many days a person was exposed to a maximum of 300 milliwatts per year in all locations in the US.
They then compared those exposures to the average of their home’s average annual temperature and humidity.
“We compared the average exposure levels in each of the 10 sites with their average annual temperatures and humidity, and then we calculated the average solar radiation dose per person,” said David W. Wittenberg, a professor of atmospheric sciences and geosciences at Columbia.
“The average exposure in the U.S. is about 3.6 milliwatt-hours per year, but the average annual average in each place is about 13 milliwat-hours,” Wittenburg told Polygon.
“The U.K. and Japan are much more isolated from each other than the U and Australia.
So in the context of a typical summer, the average U. S. person is actually getting a little bit more sun exposure than the average Japanese person.”
Wittenberg said this study doesn’t tell us whether the average American is getting more sun than the median Japanese or U. K. person.
But he did say the data does indicate that the U-shaped relationship between exposure and risk is more pronounced in the Northeast and Midwest than in the South and West.
In this graph, the red area shows average exposure, while the blue line shows average risk.
Source: Columbia University/Stanford University data source Polygons research paperThe data also shows that the most dangerous part of summer is not when the sun is shining.
“It’s when the temperature is really high and the humidity is really low,” said Wittenburger.
“It’s the period when you’re getting really hot,” he added.
“And that’s where the exposure to the radiation is going to be highest.”
But the researchers also found that the highest risk in the summertime is when people are indoors.
The average annual risk for people who live in homes with no windows is 3.8 milliwash-hours of exposure per year.
The highest risk is for people living in apartments with windows.
The highest risk of any location is in the North, and it’s also a trend that’s been going on for a long time, Wittenberger said.
“That’s the most important thing to understand, because you can have a lot of indoor heaters in a room and people still get a lot more heat exposure than in outdoor environments,” he said.
According to the report, in all 10 of the locations, the risk of a person being exposed to an average of 3.9 milliwett-hours is about half that of a normal person.
“So you can imagine the fact that you could live in a small apartment in a big city and still be getting a lot heat exposure,” said William R. Hochberg, director of the Center for Solar Energy at Stanford.
The U-shape relationship between risk and exposure, Hochburg said, is important because it “can explain the relationship between people’s risk of getting sunburns and their risk of being exposed.”
He added that the findings suggest that, in the long run, people should expect to receive a lot less sunlight from the sun.
“I think that we need to be really careful about what we’re putting on our faces, because sunlight burns your skin, and when it comes into contact with your skin it can be very damaging,” Hochburger said.
But he said that people should still be concerned about what they put on their bodies.
“A lot of people who are trying to live healthy and avoid the sun are going to put sunscreen on their faces and the skin around their ears and neck, because it’s an important part of protecting yourself against sunburn,” he told Polygonies research paper.
“But in the end it’s the sun that you’re going to have to worry about.
You’ve got to get out of your room and you’ve got a lot to do, and you’re probably going to spend a lot longer in the sun than you thought.”