Phenological spring is collapsing. Due to climate change, the biological calendar is shifting at an average rate of 2.5 to 3 days per decade earlier in temperate zones. In 2023, Washington D.C.’s cherry blossoms reached peak bloom on March 23—a full week earlier than the 1921–2020 average. This means that the months of spring are no longer fixed even by nature . What was April warmth 50 years ago is now March warmth. Phenologically, March has begun to act like April, and April like May.
The Vernal Equinox (usually March 20th or 21st). End Date: The Summer Solstice (usually June 20th or 21st). 2. Spring in the Southern Hemisphere
Phenological spring is collapsing. Due to climate change, the biological calendar is shifting at an average rate of 2.5 to 3 days per decade earlier in temperate zones. In 2023, Washington D.C.’s cherry blossoms reached peak bloom on March 23—a full week earlier than the 1921–2020 average. This means that the months of spring are no longer fixed even by nature . What was April warmth 50 years ago is now March warmth. Phenologically, March has begun to act like April, and April like May.
The Vernal Equinox (usually March 20th or 21st). End Date: The Summer Solstice (usually June 20th or 21st). 2. Spring in the Southern Hemisphere