Just HOW EARLY is spring arriving in your neighborhood?


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❝ How do you know when spring has begun? Is it the appearance of the first tiny leaves on the trees, or the first crocus plants peeping through the snow? 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 (based on NOAA National Centers for Environmental Prediction Real-Time Mesoscale Analysis temperature products).

Click through to the article and a dynamic model of this map.

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3 thoughts on “Just HOW EARLY is spring arriving in your neighborhood?

  1. Here & Now says:

    “Climate change is unraveling natural cycles in the West : Spring’s early arrival creates more mismatches in ecosystems.” http://www.hcn.org/articles/climate-change-is-disrupting-the-wests-spring-phenology The USA-National Phenology Network (USA-NPN https://www.usanpn.org/home ) studies just how much the start of spring is changing using extended spring index models, computer simulations based on a historic data set of lilac and honeysuckle phenology begun in the 1950s. The models also help scientists predict future spring arrivals. Scientists update spring index maps each day on the USA-NPN website, as well as spring leaf anomaly maps, which compare the current year’s spring to 30-year averages. See maps @ https://www.usanpn.org/data/spring The activities of the USA-NPN are funded by several organizations, including the U.S. Geological Survey, U.S. Fish & Wildlife Service, National Park Service, The University of Arizona and the National Science Foundation.

  2. Bye Bye Birdie says:

    “Songbirds are being trolled by climate change” https://qz.com/984130/songbirds-are-being-trolled-by-climate-change/
    “Understanding whether and how species are able to adjust and adapt to climate change has become one of the most urgent challenges facing ecology. Climate change is projected to drive hundreds of bird species to extinction and greatly reduce the ranges of others, and is already impacting species richness and composition. Despite these impacts, in recent decades a majority of species examined have shifted the timing (phenology) of key ecological events, such as migration or reproduction4, consistent with expectations under climate change.”
    Increasing phenological asynchrony between spring green-up and arrival of migratory birds, Scientific Reports, May 15, 2017 https://www.nature.com/articles/s41598-017-02045-z

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