The allergy season begins early each year due to climate change and pollen transport

Allergic patients are not strangers to pollen problems. But now, with climate change, the pollen season lasts longer than ever and begins earlier than ever. In other words, there are many days when itching and runny nose increase.When the temperature is high, the flowers bloom earlier and the CO becomes higher.₂ Levels produce more pollen.

Impact of climate change on pollen Season Has been studied for a long time, and According to some scientistsThe pollen season has grown as much as 20 days in the last 30 years, at least in the United States and Canada. However, one of the important factors is often overlooked. “Pollen is intended to fly,” says Dr. Annette Menzel, a professor of eco-climatology at the Technische Universität München. “We need to take transport phenomena into account.”

She is with a colleague, transport An analysis of pollen in Bavaria, Germany, to better understand how the pollen season changed over time. “Pollen transport has important implications for the length, timing, and severity of allergenic pollen seasons,” said Dr. Yeyuan, co-author of the study.

Menzel and her team focused on Bavarian, a state in southeastern Germany, and analyzed the data using six pollen monitoring stations scattered throughout the region.Their results were recently posted Frontier of allergies.. They found that pollen of certain species, such as hazel shrubs and alder trees, accelerates the beginning of the season by up to two days a year in the 30 years from 1987 to 2017. Years such as birch and ash trees moved on average 0.5 days earlier each year during the same period.

Pollen can move hundreds of kilometers Weather pattern Changes in species distribution can expose people to “new” pollen species. That is, pollen that our immune system is not accustomed to encountering each year.

Although it can be difficult to distinguish between local pollen and transported pollen, researchers focused on pre-season transport. So, for example, if pollen from a birch tree is present at a surveillance station, but the local birch tree does not bloom for at least another 10 days, then the pollen was considered to have been transported from a distance.

“I was surprised that pre-season pollen transport was a very common phenomenon and was observed in two-thirds of cases,” says Menzel. Yuan says why it’s important to understand how much pollen is in the distance. “Especially for lightweight allergens [pollen]Long-distance transport can have serious implications for human health in the region. “

Scientists can find out exactly how the pollen season is affected by climate change by examining other factors besides simple pollen concentration. For example, by “taking into account pollen transport, as is done in current studies,” Menzel said the pollen season could be even longer than estimated based on flowering observations. It states.

The Munich study did not track how far pollen was transported, but only distinguished between local and long-distance transport (meaning pollen from outside Bavaria), but in understanding the annual pollen pattern. It is an important key. Originally, future research was “Climate change scenario [and] Land use / land cover changes. He also added that citizen scientists could contribute. pollen Contribution to research, collection of local observations, and data collection.

It doesn’t look like Pollen season It will be shortened quickly, but more research on this subject will give us a better understanding of global patterns and changes, and will help researchers better address these issues in the future.

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Yes, the allergic season is getting worse.Due to climate change

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For more information:
Annette Menzel et al., First pre-season pollen transport climatology to Bavaria, Germany, Frontier of allergies (2021). DOI: 10.3389 / falgy.2021.627863

Quote: The allergy season begins early each year due to climate change and pollen transport (February 25, 2021). Obtained from https: //phys.org/news/2021-02-allergy-season-earlier-year-due.html on February 25, 2021.

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