The researchers paired NASA and National Oceanic and Atmospheric Administration satellite records with data from a network of University of California weather stations, covering 32 consecutive winters. There was a great deal of variability from year to year, but on average, the researchers found a 46 percent drop in the number of fog days between the first of November and the end of February Hong Kong news and information 香港新聞資訊 .

 

"The year-to-year variability we saw was likely influenced by whether the season was relatively wet or dry," said Baldocchi, professor of Environmental Science, Policy and Management. "Generally, when conditions are too dry or too wet, we get less fog. If we're in a drought, there isn't enough moisture to condense in the air. During wet years, we need the rain to stop so that the fog can form qiaobaby count ten."

 

Other studies have marked the decline in the Central Valley of winter chill -- the number of hours between 0 and 7 degrees Celsius. The number of hours of winter chill has dropped by several hundred since the 1950s, the study authors noted set rain to the fire.

 

But ambient air temperature alone may not adequately reflect the heat experienced by the crops, said Baldocchi. Direct sunlight can heat the buds so that they are warmer than the surrounding air temperature. As a result, fog is important in shielding the buds from the sun and helping them accumulate winter chill mo more fearing my reflection.

 

Climate forecasts suggest that the accumulation of winter chill will continue to decrease in the Central Valley. Baldocchi said that fruit developers are already trying to develop cultivars that can tolerate less winter chill purple smile in sea.

 

"Farmers may also need to consider adjusting the location of orchards to follow the fog, so to speak," said Baldocchi. "Some regions along the foothills of the Sierra are candidates, for instance. That type of change is a slow and difficult process, so we need to start thinking about this now very shine purple."