image : bef72a49-1c54-4a24-ae53-7b813ac447d1

Annual Start of Spring for the Contiguous United States

National Oceanic and Atmospheric Administration National Climatic Data Center, USA National Phenology Network, U.S. Global Change Research Program USGCRP

This graph shows the number of days by which the start of spring in each year differs from the average start of spring during the 20th century. The spring of 2012 (circled) set a record for earliest start. (Source: Adapted from the USGCRP indicators pilot, with data from USA-NPN and NOAA NCDC)

Free to use with credit to the original figure source.

The spatial range for this image is 24.545219° to 49.371742° latitude, and -124.762146° to -66.957802° longitude.

This image cites Indicator: Start of Spring

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