design and exchange

Eero Saarinen´s Womb-chair and ottoman (1946), Alvar Aalto floor lamp model A810 (1959), Barbro Nilsson Snäckorna flatweave carpet for Ab MMF (1943), George Nakashima nightstand (1965), Paavo Tynell brass bowl for Taito Oy (1950s) and Tapio Wirkkala´s Nonstop candle holder (1970s). / Instagram

im thinking of doing the 100 days of productivity challenge but my exams are in less than a hundred days (about one and a half month away), so maybe i can do a slightly different version of it. i dont have the time to post pictures. im spending almost 6 hours hunched in front of the laptop because i cant find the correct value for this heat exchanger design im doing. i also have lab and other reports to send, and im really, really behind in my tutorials. also, two presentations are due in 2 weeks.

but i really want to be more active in the studyblr community, rather than just posting a lot of posts in 2 weeks then go mia for the next 2 months. so i post here, everyday, without pictures, just texts :)

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Carbon Exchange and Loss Processes on Mars

This graphic depicts paths by which carbon has been exchanged between Martian interior, surface rocks, polar caps, waters and atmosphere, and also depicts a mechanism by which carbon is lost from the atmosphere with a strong effect on isotope ratio.

Carbon dioxide (CO2) to generate the Martian atmosphere originated in the planet’s mantle and has been released directly through volcanoes or trapped in rocks crystallized from magmas and released later. Once in the atmosphere, the CO2 can exchange with the polar caps, passing from gas to ice and back to gas again. The CO2 can also dissolve into waters, which can then precipitate out solid carbonates, either in lakes at the surface or in shallow aquifers.

Carbon dioxide gas in the atmosphere is continually lost to space at a rate controlled in part by the sun’s activity.  One loss mechanism is called ultraviolet photodissociation. It occurs when ultraviolet radiation (indicated on the graphic as “hv”) encounters a CO2 molecule, breaking the bonds to first form carbon monoxide (CO) molecules and then carbon © atoms.  The ratio of carbon isotopes remaining in the atmosphere is affected as these carbon atoms are lost to space, because the lighter carbon-12 (12C) isotope is more easily removed than the heavier carbon-13 (13C) isotope. This fractionation, the preferential loss of carbon-12 to space, leaves a fingerprint: enrichment of the heavy carbon-13 isotope, measured in the atmosphere of Mars today.

Image Credit: Lance Hayashida/Caltech

Capricorn

leather-bound and weather-worn

your goals have changed and rechanged

as you have trudged along

but the semblance of their original shape is still visible

the first page is still the root of the tree

and you will, you will succeed

the dull fear you feel when you see a smiling couple

fingers intertwined, arms warm in designer sweater sleeves

this exchange is not the opposite of you

though your own heart feels as if you’ve hardened it into onyx

with your workload and your late hours

the soft touch and partnership of the right person

will melt your onyx heart into dark chocolate

you will remember the glossy taste when the time is right

and the earth groans, yes, but darling

it groans under the weight of humanity, not you alone

and you need not apologize for your pound of silver

or your heavy chocolate heart