Mahaffy: Ancient Martian water bound in Mars clays 3x enriched in heavy H compared to Earth -- means Mars had lost some atmos by then #AGU13

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RT @theAGU: AGU Session On Dealing With Bullies Who Target Scientists
http://goo.gl/rFIQns #AGU13 #copycentral

HAHA guilty RT @HopeJahren: Geoscientists tweet photos out their plane window like hipsters tweet pictures of their brunch. #AGU13

What was with all those pushy salespeople at #AGU13? I was almost forced to buy massage equipment & an iphone charger. Not appropriate!

AGU 2013, IN51D, IN53C: Data Stewardship in Theory and in...

#AGU13 Flash Mob in 15 min (4:00)!! Data Stewardship in Theory & in Practice Posters in Moscone South, IN51C http://dusk.geo.orst.edu/agu13_steward.html

Data stewardship has always been part of scientific method & training students in this already science training #AGU13 IN51D, IN53C

More great #AGU13 discussions among "data scientists who have come of age" http://esriurl.com/agudatasci http://t.co/S9cK6rHYdS

Great idea for our #AGU13 IN43A poster session: we all spoke @5 min to entire group. Everyone gets to see! http://t.co/3AXeJXyvpO

Presenting today at #AGU13 IN43A: Data Scientists Come of Age http://esriurl.com/agudatasci #gis

Spilker: Cassini has only 4% of propellant left. Shape orbits patiently with Titan flybys. #AGU13

Spilker: A number of mysteries for Cassini yet to solve as summer solstice comes to Titan and Saturn north poles. #AGU13

Mastrogiuseppe reports lakes are pure methane with some ethane. Kargel asks: where are other hydrocarbons hiding? #AGU13

Mastrogiuseppe: August 2014 Cassini will perform similar sounding on Titan's largest lake, Kraken Mare. #AGU13

Mastrogiuseppe: Ligeia Mare max depth 160-17m, average depth about 60m. Similar to Lake Michigan. Liquid very transparent to radar. #AGU13

Mastrogiuseppe: Processed Cassini radar altimetry data same way we do Mars sounding radar data to determine depth of Titan seas #AGU13

Kirk: "When geologists see straight lines, they immediately jump to the idea of faulting." #AGU13 Like Basin & Range? http://t.co/El8ZBfI5Sr

NASA JPL Live Fixing Voyager: How NASA Restored Communications with Voy...

One more #AGU13 press briefing... New results from Cassini at Titan http://www.ustream.tv/nasajpl2

Hubble Space Telescope Sees Evidence of Water Vapor Venti... NASA’s Hubble Space Telescope has observed water vapor ab...

2010: "All these worlds are yours,except #Europa.Attempt no landing there.Use them together.Use them in peace" http://go.nasa.gov/1d9E9L4 #AGU13

RT @asrivkin: Further evidence that planetary science is interdisciplinary by nature, with roles for both astronomers and geologists. #AGU13

Europa plume 200 km high vs Enceladus 500 due to gravity difference. But Europa spewing 7000kg/s vs 200kg/s for Enceladus -- wow! #AGU13

Retherford: We don't know if plume is generated by a liquid water source or not. // Maybe not just like Enceladus #AGU13

Plumes on Europa! Just like Enceladus! That means it's putting its ocean into space where an orbiter could scoop it up! #AGU13

Phew -- made it home in time from dropping kids off to see this morning's Europa briefing from #AGU13.

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Missing you at #AGU13 @LizNeeley RT @OhMyCorgi: The corgi who thought he was a sea turtle. http://bit.ly/1cCyr6y

#AGU13 evening Ignite session igniting my imagination! What an awesome event! http://t.co/gOWRJd51Qr

Explore Street View and add your own 360 images to Google... Learn how to navigate and use Street View. Explore the wo...

Enjoy new Google Street View of Antarctica http://bit.ly/19DdYtT (bonus: penguins! Shackleton's hut!!) h/t @PopePolar #AGU13

Warmest congratulations to @voooos tonight, receiving #AGU13 David Perlman Award for Excellence in Science Journalism (News)

Thx! RT @NoelleSelin: Great #AGU13 social media as academic service poster by @deepseadawn http://bit.ly/1bEUklv Nice map interface #gis

Assessing “Dangerous Climate Change”: Required Reduction of Carbon Emissions to Protect Young People, Future Generations and Nature We assess climate impacts of global warming using ongoing observations and paleoclimate data. We use Earth’s measured energy imbalance, paleoclimate data, and simple representations of the global carbon cycle and temperature to define emission reductions needed to stabilize climate and avoid potentially disastrous impacts on today’s young people, future generations, and nature. A cumulative industrial-era limit of ∼500 GtC fossil fuel emissions and 100 GtC storage in the biosphere and soil would keep climate close to the Holocene range to which humanity and other species are adapted. Cumulative emissions of ∼1000 GtC, sometimes associated with 2°C global warming, would spur “slow” feedbacks and eventual warming of 3–4°C with disastrous consequences. Rapid emissions reduction is required to restore Earth’s energy balance and avoid ocean heat uptake that would practically guarantee irreversible effects. Continuation of high fossil fuel emissions, given current knowledge of the consequences, would be an act of extraordinary witting intergenerational injustice. Responsible policymaking requires a rising price on carbon emissions that would preclude emissions from most remaining coal and unconventional fossil fuels and phase down emissions from conventional fossil fuels.

Everyone should read James Hansen's paper on dangerous #climatechange. Well written, accessible: www.plosone.org/article/info%3Adoi%2F10.... #AGU13 @PLOSONE

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I hope some of you at #AGU13 will join me at a Friday morning session on Citizen Science in the Era of Big Data www.planetary.org/blogs/emily-lakdawalla/2...