Back to Search
Start Over
Surface Warming During the 2018/Mars Year 34 Global Dust Storm
- Source :
- Geophysical Research Letters
- Publication Year :
- 2019
-
Abstract
- The impact of Mars's 2018 Global Dust Storm (GDS) on surface and near‐surface air temperatures was investigated using an assimilation of Mars Climate Sounder observations. Rather than simply resulting in cooling everywhere from solar absorption (average surface radiative flux fell 26 W/m2), the globally averaged result was a 0.9‐K surface warming. These diurnally averaged surface temperature changes had a novel, highly nonuniform spatial structure, with up to 16‐K cooling/19‐K warming. Net warming occurred in low thermal inertia regions, where rapid nighttime radiative cooling was compensated by increased longwave emission and scattering. This caused strong nightside warming, outweighing dayside cooling. The reduced surface‐air temperature gradient closely coupled surface and air temperatures, even causing local dayside air warming. Results show good agreement with Mars Climate Sounder surface temperature retrievals. Comparisons with the 2001 GDS and free‐running simulations show that GDS spatial structure is crucial in determining global surface temperature effects.<br />Key Points Mars's 2018 Global Dust Storm caused a 0.9‐K globally averaged surface warming but with local 16‐K cooling/19‐K warmingThe magnitude of dayside cooling was controlled by atmospheric dust, and nightside warming by surface thermal inertiaThe effects were strongly nonuniform, with high dust loading causing net warming (cooling) over low (high) thermal inertia continents
- Subjects :
- Atmospheres
010504 meteorology & atmospheric sciences
Radiative cooling
Studies of the 2018/Mars Year 34 Planet‐Encircling Dust Storm
Planets
Mars
Atmospheric Composition and Structure
010502 geochemistry & geophysics
Atmospheric sciences
01 natural sciences
Data Assimilation
Planetary Geochemistry
Radiative flux
Data assimilation
Planetary Sciences: Solar System Objects
Mars atmosphere
Dust storm
dust storm
Research Letter
Planetary Sciences: Solid Surface Planets
0105 earth and related environmental sciences
Mars Climate Sounder
Radiative Processes
Longwave
Planetary Atmospheres
Mars Exploration Program
Atmosphere of Mars
Research Letters
Temperature gradient
Geophysics
Geochemistry
Atmospheric Processes
General Earth and Planetary Sciences
Environmental science
Clouds and Aerosols
Subjects
Details
- ISSN :
- 00948276
- Volume :
- 47
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Geophysical research letters
- Accession number :
- edsair.doi.dedup.....4d4fea552fc8e5c4ddf3e4104898da4c