That's Xeni Jardin's charming term for the onset of allergy season. If you aren't suffering enough already, global warming is going to make pollen much worse:
USDA scientist Lewis Ziska, among other researchers, has found that ragweed is one of the plants whose growth is most enhanced by exposure to higher concentrations of carbon dioxide. Not only does the ragweed grow faster when exposed to more CO2, it also produces more pollen. This is especially an issue in cities, which have higher concentrations of CO2 than rural areas, thanks to having a higher concentration of cars and other CO2 emitting sources. Extra bonus: There's also some evidence that allergy seasons are getting longer, as Spring starts earlier and Winter takes longer to truly set in.
Climate Central has a cool interactive showing how early spring is arriving, state by state:
Nationwide, the date of "first leaf" has clearly shifted — arriving roughly three days earlier now on March 17th (1981-2010 average) from March 20th (1951-1980 average). This shift affects all sorts of biological processes that are triggered by warmer temperatures — not just flowering, but animal migration and giving birth and the shedding of winter coats and the emergence from cocoons. How much will an earlier spring disrupt the intricate natural balance between the tens of thousands of species that depend on each other for food, reproduction and ultimately, survival? No one really knows.
(Video via Maria Popova)
The Dish 