"Spring is arriving very early this year . . . at least 2-3 weeks early across almost the entire Southeast, from San Antonio to Atlanta to Washington, D.C."
"When the researchers applied the plant models to the recent weather data, they were able to create national-scale daily maps of leaf emergence for these plant species. Then, by comparing the daily maps from this year to historical maps created the same way, they created maps that showed just how different this year is relative to the long-term average (1981-2010). It is these data that reveal just how unusually early spring is arriving across most of the USA this year."
"The Spring Leaf Index is a measure of these early season events in plants, based on recent temperature conditions. This model allows us to track the progression of spring onset across the country. The map shows locations that have reached the requirements for the Spring Leaf Index model."
Via usgs.gov
"When the researchers applied the plant models to the recent weather data, they were able to create national-scale daily maps of leaf emergence for these plant species. Then, by comparing the daily maps from this year to historical maps created the same way, they created maps that showed just how different this year is relative to the long-term average (1981-2010). It is these data that reveal just how unusually early spring is arriving across most of the USA this year."
"The Spring Leaf Index is a measure of these early season events in plants, based on recent temperature conditions. This model allows us to track the progression of spring onset across the country. The map shows locations that have reached the requirements for the Spring Leaf Index model."
Via usgs.gov
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