Matches in SemOpenAlex for { <https://semopenalex.org/work/W2758325352> ?p ?o ?g. }
Showing items 1 to 91 of
91
with 100 items per page.
- W2758325352 abstract "The progressive drying-out of Mars' surface was punctuated by a dramatic transient increase in fluvial erosion around the Noachian-Hesperian boundary ($sim$3.7 Ga). Standard explanations of this climate optimum appeal to volcano- or impact-triggered climates and imply that individual runoff episodes were brief, apparently inconsistent with evidence for persistent runoff. We examine a scenario in which the duration, intensity and uniqueness of the Noachian-Hesperian climate optimum result from degassing of CH$_4$-clathrate consequent to atmospheric collapse. Atmospheric collapse causes low-latitude surface water ice to sublimate away, depressurizing and thus destabilizing CH$_4$ clathrate in subglacial pore space. Subsequent atmospheric re-inflation leads to warming that further destabilizes CH$_4$ clathrate. CH$_4$-induced warming is efficient, permitting strong positive feedbacks, and possibly raising Mars into a climate optimum. The optimum is brought to a close by photochemical destruction of CH$_4$ or by a new atmospheric collapse, and drawdown of the CH$_4$-clathrate reservoir prevents recurrence. This scenario predicts a 10$^5$-10$^6$ yr climate optimum, transient connections between the deep hydrosphere and the surface, mud volcanism, and strong surface weathering, all of which are consistent with recent observations. Crustal hydrothermal circulation very early in Mars history could yield CH$_4$ that would be incorporated into clathrate on approach to the cold surface. The scenario explains why regional watershed integration on Mars occurred relatively late and apparently only once, and suggests that the contrasts between Noachian versus Hesperian climate-sensitive deposits on Mars correspond to a transition from a never-collapsed atmosphere to a collapse-prone climate, ultimately driven by slow loss of CO$_2$ to space." @default.
- W2758325352 created "2017-10-06" @default.
- W2758325352 creator A5007397257 @default.
- W2758325352 creator A5036634401 @default.
- W2758325352 creator A5048042559 @default.
- W2758325352 creator A5052312960 @default.
- W2758325352 date "2017-09-25" @default.
- W2758325352 modified "2023-10-18" @default.
- W2758325352 title "Climate optimum on Mars initiated by atmospheric collapse" @default.
- W2758325352 hasPublicationYear "2017" @default.
- W2758325352 type Work @default.
- W2758325352 sameAs 2758325352 @default.
- W2758325352 citedByCount "0" @default.
- W2758325352 crossrefType "posted-content" @default.
- W2758325352 hasAuthorship W2758325352A5007397257 @default.
- W2758325352 hasAuthorship W2758325352A5036634401 @default.
- W2758325352 hasAuthorship W2758325352A5048042559 @default.
- W2758325352 hasAuthorship W2758325352A5052312960 @default.
- W2758325352 hasConcept C100402318 @default.
- W2758325352 hasConcept C107218244 @default.
- W2758325352 hasConcept C111368507 @default.
- W2758325352 hasConcept C114990195 @default.
- W2758325352 hasConcept C115343472 @default.
- W2758325352 hasConcept C121332964 @default.
- W2758325352 hasConcept C126026641 @default.
- W2758325352 hasConcept C127313418 @default.
- W2758325352 hasConcept C132651083 @default.
- W2758325352 hasConcept C178790620 @default.
- W2758325352 hasConcept C179537507 @default.
- W2758325352 hasConcept C185592680 @default.
- W2758325352 hasConcept C18903297 @default.
- W2758325352 hasConcept C1965285 @default.
- W2758325352 hasConcept C2776860271 @default.
- W2758325352 hasConcept C2777094093 @default.
- W2758325352 hasConcept C2778600265 @default.
- W2758325352 hasConcept C2781060337 @default.
- W2758325352 hasConcept C50477045 @default.
- W2758325352 hasConcept C55173820 @default.
- W2758325352 hasConcept C83260615 @default.
- W2758325352 hasConcept C86803240 @default.
- W2758325352 hasConcept C87355193 @default.
- W2758325352 hasConceptScore W2758325352C100402318 @default.
- W2758325352 hasConceptScore W2758325352C107218244 @default.
- W2758325352 hasConceptScore W2758325352C111368507 @default.
- W2758325352 hasConceptScore W2758325352C114990195 @default.
- W2758325352 hasConceptScore W2758325352C115343472 @default.
- W2758325352 hasConceptScore W2758325352C121332964 @default.
- W2758325352 hasConceptScore W2758325352C126026641 @default.
- W2758325352 hasConceptScore W2758325352C127313418 @default.
- W2758325352 hasConceptScore W2758325352C132651083 @default.
- W2758325352 hasConceptScore W2758325352C178790620 @default.
- W2758325352 hasConceptScore W2758325352C179537507 @default.
- W2758325352 hasConceptScore W2758325352C185592680 @default.
- W2758325352 hasConceptScore W2758325352C18903297 @default.
- W2758325352 hasConceptScore W2758325352C1965285 @default.
- W2758325352 hasConceptScore W2758325352C2776860271 @default.
- W2758325352 hasConceptScore W2758325352C2777094093 @default.
- W2758325352 hasConceptScore W2758325352C2778600265 @default.
- W2758325352 hasConceptScore W2758325352C2781060337 @default.
- W2758325352 hasConceptScore W2758325352C50477045 @default.
- W2758325352 hasConceptScore W2758325352C55173820 @default.
- W2758325352 hasConceptScore W2758325352C83260615 @default.
- W2758325352 hasConceptScore W2758325352C86803240 @default.
- W2758325352 hasConceptScore W2758325352C87355193 @default.
- W2758325352 hasLocation W27583253521 @default.
- W2758325352 hasOpenAccess W2758325352 @default.
- W2758325352 hasPrimaryLocation W27583253521 @default.
- W2758325352 hasRelatedWork W1628010003 @default.
- W2758325352 hasRelatedWork W1875794043 @default.
- W2758325352 hasRelatedWork W1982678971 @default.
- W2758325352 hasRelatedWork W2514773652 @default.
- W2758325352 hasRelatedWork W2552092415 @default.
- W2758325352 hasRelatedWork W2582611256 @default.
- W2758325352 hasRelatedWork W2659858250 @default.
- W2758325352 hasRelatedWork W2755924591 @default.
- W2758325352 hasRelatedWork W2762149553 @default.
- W2758325352 hasRelatedWork W2928510677 @default.
- W2758325352 hasRelatedWork W2970727825 @default.
- W2758325352 hasRelatedWork W3010618459 @default.
- W2758325352 hasRelatedWork W3013380184 @default.
- W2758325352 hasRelatedWork W3015654769 @default.
- W2758325352 hasRelatedWork W3133880449 @default.
- W2758325352 hasRelatedWork W3160755510 @default.
- W2758325352 hasRelatedWork W3167335479 @default.
- W2758325352 hasRelatedWork W3180413783 @default.
- W2758325352 hasRelatedWork W170279494 @default.
- W2758325352 hasRelatedWork W1714440216 @default.
- W2758325352 isParatext "false" @default.
- W2758325352 isRetracted "false" @default.
- W2758325352 magId "2758325352" @default.
- W2758325352 workType "article" @default.