Discover and read the best of Twitter Threads about #asteroidday

Most recents (2)

1. @ExtinctionR Having looked at some of your policies & grievances my advice to you as a scientist is to do your own research before you jump to conclusions; resist the temptation to go down a EnergyDeadEnd path before really appreciating after years of research life's realities
2. @ExtinctionR scenario has come about through a few scientists exaggerating #ClimateChange which is a natural phenomena that has occurred since Earth had an atmosphere; one of the variables keeping us warm is yes photosynthesising #TraceGas #CO2 as well as water vapour (clouds)
3. @ExtinctionR Earth's CO2 levels vary over time & currently only 0.041% or to make it sound larger 410ppm on average; at levels below 200ppm to 150ppm #photosynthesis ceases & all life relying on plants will die off.
Many other variables are involved with #ClimateChange e.g.Sun
Read 26 tweets
As I prepare slides & we pack bags for Luxembourg & #AsteroidDay, something strange is appearing in skies over #NewMexico & around the world. Noctilucent clouds—shimmering wisps in twilight sky—are normally only seen on poleward side of 50°. This year they're below 35°. Why!?
NLCs are easily visible to naked eye, but were never reported before the industrial revolution had kicked into high gear. The first confirmed observations were in 1885. It's tempting to link them to fossil-fuel driven climate change but could that generate clouds 50 miles up?
Human-caused global warming causes stratospheric & mesospheric cooling, which might suggest more condensation of ice particles that make up NLCs. But colder air means crystals are also smaller, with a counterintuitive visibility reduction. earther.gizmodo.com/humans-are-mak…
Read 24 tweets

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