Scientists studied Number of rainy days in a year. In their opinion, reducing it can lead to the fact that in the northern hemisphere Plants will bloom earlier.
Researchers expect that at the current rate of decrease in precipitation Every decade, donuts will develop a day or two earlier.
Previous scientific research has focused on how higher temperatures associated with climate warming affect the beginning of spring. The current analyzes are the first in relation to precipitation.
So far, scientists have mainly studied how temperature affects them The first signs of spring appear. If they really deal with precipitation, that would only be the total amount, said Desheng Liu, one of the co-authors on the latest study.
– But it’s not about the total precipitation. He emphasized that the most important thing is how often it rains.
Therefore, in their study, scientists from Ohio University examined data from the USA, Europe and China, including the dates on which they appeared. The first signs of spring The number of rainy days each month.
Analyzes showed that With fewer rainy days, spring came early In most parts of the northern hemisphere.
Based on the developed model, scientists expect that lower precipitation will result in this Around the year 2100, spring will come 10 days earlier.
According to researchers, there are two reasons for this The amount of rain translates to the start date of spring. First, rainy days are also cloudy, which means that when there is less rain, trees and plants receive more sunlight earlier in the year, which in turn stimulates leaf growth.
Second, fewer cloudy days mean higher daytime temperatures. At night, with no clouds to trap heat, temperatures drop faster. – Such a discrepancy earlier in the year makes him Plants think it’s already spring They are beginning to thrive, said Jian Wang, a co-author on the study.
However, scholars note that the beginning of spring It can have a general effect on nature. If the plants bloom too early, a late frost may harm them.
