Here is an interactive
map that enables you to see exactly how the weather has gotten warmer in the US this
North America has had an early spring with record breaking
temperatures stretching for thousands of kilometers. When we put the climate
data together we see that over the past several decades, with the exception of
the Southeast, spring weather has indeed been arriving earlier.
interactive below, you can see how much earlier spring has arrived
state-by-state, measured by the date of first leaf. As you hover over any
state, it’ll display two boxes—a gray box that represents the day spring used
to arrive (based on the 1951-1980 average) and a colored box that represents
how much earlier spring has arrived (based on the 1981-2010 average).
date of “first leaf” has clearly shifted—arriving roughly 4 days earlier now on
March 17 (1981-2010 average) from March 20 (1951-1980 average). This shift
affects all sorts of biological processes that are triggered by warmer temperatures—not
just flowering, but animal migration and giving birth and the shedding of
winter coats and the emergence from cocoons.
spring may disrupt the intricate natural balance between the tens of thousands
of species that depend on each other for food, reproduction and ultimately,
the map comes from an index for the onset of spring developed by Mark D.
Schwartz (University of Wisconsin-Milwaukee) and USA
National Phenology Network colleagues. The index, based on temperature
variables measured at individual weather stations, estimates the first day that
leaves appear on plants in a given state. To come up with a US estimate as
a whole, they took the average change across 716 weather stations spread across
the lower 48 states.
the map’s interactive features, click here.
Bill McKibben on Connect the Dots Events
100 Global Activities for Climate Impacts Day
The World “Connects the Dots” Between Extreme Weather & Climate Change
Business and Climate Impacts Day
Bill McKibben on Connect the Dots
Connect the Dots End Fossil Fuel
McKibben Attributes Extreme Weather Events to Climate Change
Extreme Weather Makes a Convincing Case for Climate Change
Hurricane Irene and the Staggering Costs of Climate Change
Deadly Tornadoes in Massachusetts
Tornadoes and Floods Underscore the Costs of Global Warming
Extreme Weather and the Costs of Climate Change
State of the Climate Global Analysis Nov 2011
Floods in the Philipines Underscore the Deadly Toll from Climate Change
The Costs of Global Warming
24 Hours of Reality
Science and Pernicious Ignorance of Climate Change Denial
Canada’s White Christmas Isn’t So White Anymore
Blumenauer Video: ‘The Jihad Against Climate Change Continues’
Video: Demand a Green Planet for Yourself and for Your Children
The Effects of Global Warming