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Related Concept Videos

Impact: Problem Solving01:26

Impact: Problem Solving

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In an experiment conducted during a Mars mission, a rover propels a projectile with an initial velocity, and the projectile rebounds after colliding with the Martian surface. To ascertain the maximum height attained by the projectile after this collision, the known restitution coefficient and acceleration due to gravity are employed.
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Mass Spectrum01:23

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A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ratio (m/z). The plot's x axis represents the ratio of the mass of the charged fragment to the elementary charge it carries. The y axis of the plot represents the relative abundance of each charged species. The relative abundance is calculated from the signal intensity of each charged species recorded at the detector. The most intense signal...
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This lesson delves into the mass spectrometry of branched alkane fragmentation. Branched alkanes possess secondary or tertiary carbon atoms, which generate relatively stable carbocations if the cleavage occurs at the branching point. The high stability of carbocations drives the instant fragmentation of branched alkanes. Accordingly, the branched alkane's molecular ion peak is very weak or invisible in the mass spectra, especially in comparison to a linear alkane.
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Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
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Mars Methane Sources in Northwestern Gale Crater Inferred From Back Trajectory Modeling.

Y Luo1, M A Mischna2, J C Lin3

  • 1Division of Geological and Planetary Sciences California Institute of Technology Pasadena CA USA.

Earth and Space Science (Hoboken, N.J.)
|July 21, 2022
PubMed
Summary
This summary is machine-generated.

Mars

Keywords:
MSLMarsTGOTLSback trajectorymethane

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Area of Science:

  • Planetary Science
  • Astrobiology
  • Geochemistry

Background:

  • Methane detection on Mars is crucial for understanding potential habitability.
  • The Sample Analysis at Mars Tunable Laser Spectrometer (TLS) has observed methane spikes in Gale Crater.
  • Previous studies have indicated methane sources within or near Gale Crater.

Purpose of the Study:

  • To pinpoint the surface emission regions of methane spikes detected by the Curiosity rover.
  • To achieve unprecedented spatial resolution in identifying Martian methane sources.
  • To investigate the origin and transport of methane within Gale Crater.

Main Methods:

  • Utilized inverse Lagrangian modeling techniques.
  • Analyzed seven methane spikes detected by the Tunable Laser Spectrometer (TLS) over seven years.
  • Correlated methane detections with potential surface emission areas.

Main Results:

  • Identified the northwestern crater floor within Gale Crater as a significant influence on methane detections.
  • Determined that upstream emission regions for methane spikes extend northward outside the crater.
  • Contrasting measurements suggest an active methane emission site west or southwest of the rover on the northwestern crater floor.

Conclusions:

  • The northwestern crater floor is a favored location for methane emission sites.
  • Active methane emissions on Mars require further investigation, potentially involving fast methane removal processes.
  • Discrepancies in methane detection data necessitate careful consideration of instrument capabilities and environmental factors.