Search Results - "Heavens, Nicholas G."

A multiannual record of gravity wave activity in Mars’s lower atmosphere from on-planet observations by the Mars Climate Sounder by Heavens, Nicholas G., Kass, David M., Kleinböhl, Armin, Schofield, John T.

“…Gravity waves in Mars’s atmosphere strongly affect the general circulation as well as middle atmospheric cloud formation, but the climatology and sources of…”
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Aerosol Impacts on Climate and Biogeochemistry by Mahowald, Natalie, Ward, Daniel S, Kloster, Silvia, Flanner, Mark G, Heald, Colette L, Heavens, Nicholas G, Hess, Peter G, Lamarque, Jean-Francois, Chuang, Patrick Y

“…Aerosols are suspensions of solid and or liquid particles in the atmosphere and modify atmospheric radiative fluxes and chemistry. Aerosols move mass from one…”
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The role of snowfall in forming the seasonal ice caps of Mars: Models and constraints from the Mars Climate Sounder by Hayne, Paul O., Paige, David A., Heavens, Nicholas G.

“…•We use infrared observations of polar carbon dioxide clouds to estimate the rate of snowfall during polar winter on Mars.•Snowfall in south polar winter…”
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Dusty Deep Convection in the Mars Year 34 Planet‐Encircling Dust Event by Heavens, Nicholas G., Kass, David M., Shirley, James H.

“…Dusty convection, convective activity powered by radiative heating of dust, is a ubiquitous phenomenon in Mars's atmosphere but is especially deep (i.e.,…”
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Carbon dioxide snow clouds on Mars: South polar winter observations by the Mars Climate Sounder by Hayne, Paul O., Paige, David A., Schofield, John T., Kass, David M., Kleinböhl, Armin, Heavens, Nicholas G., McCleese, Daniel J.

“…We present south polar winter infrared observations from the Mars Climate Sounder (MCS) and test three hypotheses concerning the origins of “cold spots”:…”
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Response: commentary: detecting upland glaciation in Earth’s pre-Pleistocene record by Soreghan, Gerilyn S., Pfeifer, Lily S., Sweet, Dustin E., Heavens, Nicholas G.

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Mars Climate Sounder Observations of Gravity-wave Activity throughout Mars’s Lower Atmosphere by Heavens, Nicholas G., Pankine, Alexey, Battalio, J. Michael, Wright, Corwin, Kass, David M., Kleinböhl, Armin, Piqueux, Sylvain, Schofield, John T.

“…Gravity waves are one way Mars’s lower atmospheric weather can affect the circulation and even composition of Mars’s middle and upper atmosphere. A recent…”
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Temperatures and aerosol opacities of the Mars atmosphere at aphelion: Validation and inter-comparison of limb sounding profiles from MRO/MCS and MGS/TES by Shirley, James H., McConnochie, Timothy H., Kass, David M., Kleinböhl, Armin, Schofield, John T., Heavens, Nicholas G., McCleese, Daniel J., Benson, Jennifer, Hinson, David P., Bandfield, Joshua L.

“…•Nighttime temperatures from TES and MCS may be compared directly.•Scaling permits comparison of TES and MCS H2O ice and dust aerosol opacities.•Inter-annual…”
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Seasonal and diurnal variability of detached dust layers in the tropical Martian atmosphere by Heavens, Nicholas G., Johnson, Morgan S., Abdou, Wedad A., Kass, David M., Kleinböhl, Armin, McCleese, Daniel J., Shirley, James H., Wilson, R. John

“…Evidence for widespread nonuniform vertical mixing of dust in Mars's tropical atmosphere (in the form of features called “detached dust layers” or DDLs) is a…”
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Hydrogen escape from Mars enhanced by deep convection in dust storms by Heavens, Nicholas G., Kleinböhl, Armin, Chaffin, Michael S., Halekas, Jasper S., Kass, David M., Hayne, Paul O., McCleese, Daniel J., Piqueux, Sylvain, Shirley, James H., Schofield, John T.

“…Present-day water loss from Mars provides insight into Mars’s past habitability 1 – 3 . Its main mechanism is thought to be Jeans escape of a steady hydrogen…”
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The Horizontal Wavelength Spectrum of Gravity Wave Activity in Mars’s Lower Atmosphere: The Perspective from MGS–TES Nadir Observations by Heavens, Nicholas G., Pankine, Alexey, Battalio, J. Michael, Wright, Corwin

“…Connecting upper-atmospheric gravity waves (GW) to their lower- and middle-atmospheric (0–30 and 30–100 km altitude) origins can improve understanding of the…”
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A model-based evaluation of tropical climate in Pangaea during the late Palaeozoic icehouse by Heavens, Nicholas G., Mahowald, Natalie M., Soreghan, Gerilyn S., Soreghan, Michael J., Shields, Christine A.

“…The late Palaeozoic ice age (LPIA) is the Earth's penultimate “icehouse climate.” Geological proxies for tropical Pangaean climate during the LPIA are…”
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Upland Glaciation in Tropical Pangaea: Geologic Evidence and Implications for Late Paleozoic Climate Modeling by Soreghan, Gerilyn S., Sweet, Dustin E., Heavens, Nicholas G.

“…The late Paleozoic archives a prolonged icehouse, long recognized by means of Gondwanan continental glaciation. In contrast, the paleotropics have long been…”
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Mars Perihelion Cloud Trails as revealed by MARCI: Mesoscale Topographically Focussed Updrafts and Gravity Wave Forcing of High Altitude Clouds by Clancy, R Todd, Wolff, Michael J, Heavens, Nicholas G, James, Philip B, Lee, Steven W, Sandor, Brad J, Cantor, Bruce A, Malin, Michael C, Tyler, Jr, Daniel, Spiga, Aymeric

“…Daily, global wide angle imaging of Mars clouds in MARCI (MARs Color Imager, (Malin et al., 2008)) ultraviolet and visible bands reveals the spatial/seasonal…”
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Planetary science. Sunshine on a cloudy forecast by Heavens, Nicholas G

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Detecting upland glaciation in Earth’s pre-Pleistocene record by Soreghan, Gerilyn S., Pfeifer, Lily S., Sweet, Dustin E., Heavens, Nicholas G.

“…Earth has sustained continental glaciation several times in its past. Because continental glaciers ground to low elevations, sedimentary records of ice contact…”
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Sunshine on a Cloudy Forecast by Heavens, Nicholas G.

“…The observation of supersaturated layers in Mars' atmosphere has implications for modeling the dynamics of its climate and water cycle. Atmospheric water vapor…”
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Large Eddy Simulations of the Dusty Martian Convective Boundary Layer With MarsWRF by Wu, Zhaopeng, Richardson, Mark I., Zhang, Xi, Cui, Jun, Heavens, Nicholas G., Lee, Christopher, Li, Tao, Lian, Yuan, Newman, Claire E., Soto, Alejandro, Temel, Orkun, Toigo, Anthony D., Witek, Marcin

“…Large eddy simulation (LES) of the Martian convective boundary layer (CBL) with a Mars‐adapted version of the Weather Research and Forecasting model is used to…”
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A Multiannual Record of Convective Instability in Mars’s Middle Atmosphere from the Mars Climate Sounder by Heavens, Nicholas G., Pankine, Alexey, Battalio, J. Michael, Wright, Corwin, Kass, David M., Kleinböhl, Armin

“…Gravity waves (GW) transfer energy and momentum from the lower to the middle and upper atmospheres of Earth and Mars. Momentum transfer can occur through the…”
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Discovery of a widespread low‐latitude diurnal CO2 frost cycle on Mars by Piqueux, Sylvain, Kleinböhl, Armin, Hayne, Paul O., Heavens, Nicholas G., Kass, David M., McCleese, Daniel J., Schofield, John T., Shirley, James H.

“…While the detection of CO2 ice has only been reported outside the Martian polar regions at very high elevation (i.e., Elysium, Olympus Mons, and the Tharsis…”
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