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413,874 followers   •   10,016 following   •   Tucson, AZ   •   https://tinyletter.com/sc
Meteorologist | Climate hawk | Host of @ourwarmregards podcast. Say hi: sciencebyericholthaus@gmail.com

Latest Scoops

Here's global CO2 for the past 800,000 years (measured via ancient air trapped in bubbles in Antarctic ice cores)—before modern humans evolved.
Again, the sharp upward spike at the end is industrial civilization.
What we are doing is unlike anything humanity has ever seen before.
For perspective:
Here's global CO2 for the past 10,000 years -- roughly since humans first invented agriculture. Notice the sharp upward spike at the end -- that's industrial civilization.
Puerto Rico, Day 177:
—More than 250,000 people still w/o power (8% of the island)
—Tens of thousands of people still w/o clean water
—For these people, Hurricane Maria is still a humanitarian emergency
There’s new evidence this week that disruptions in the Arctic linked to climate change are fueling severe winter weather along the East Coast, especially during February and March.

Big snowstorms may be getting more frequent in the Northeast, but *annual* snow totals are holding steady — or even declining.

In Arkansas, Tennessee, and North Carolina, snow totals have plunged by 50%+ over the past 30 years.

(h/t @Climatologist49)
A new study shows that over the past century, 90%+ of snow monitoring sites throughout the West have seen a decline in snowpack.

“It is a bigger decline than we had expected. … In many lower-elevation sites, what used to fall as snow is now rain.”

The loss of western snowpack has removed a Lake Mead worth of water storage over the past 100 years.

This is just the beginning. It’s clear that the West’s steady and transformative slide into a drier future has already begun.

The Koch brothers preached the gospel of fossil fuels in Virginia.

Now, black churches are fighting back.

@LiveFromKenya's @grist debut cover story:
“I don’t think it’s hyperbolic to say that this winter is the stuff of nightmares for water managers in the Colorado River watershed.”

~40,000,000 people in seven states depend on Colorado River water.

America, wake up. Climate change is already here.

After years of drought, water levels at Lake Mead—the most important reservoir in the western U.S.—are on track to trigger the first-ever official shortfall in late 2019, according to new data from @usbr.

A brave new era is about to begin.

Total(1) => 0.13509702682495 f_f_QM(2) => 0.12176990509033 indS(2) => 0.073421001434326 indM(2) => 0.031737089157104 indM_1(2) => 0.0016739368438721 indM_2(2) => 0.00091195106506348 indM_4(2) => 0.0034990310668945 indM_5(2) => 0.0066518783569336 indM_6(2) => 0.0036962032318115 indM_7(2) => 0.013365268707275 indM_8(2) => 0.0011279582977295 f_f_pTL(2) => 0.011388063430786 f_f_dT(20) => 0.010990142822266