TY - JOUR
T1 - Winds at the Mars 2020 Landing Site
T2 - 1. Near-Surface Wind Patterns at Jezero Crater
AU - Viúdez-Moreiras, D.
AU - Lemmon, M.
AU - Newman, C. E.
AU - Guzewich, S.
AU - Mischna, M.
AU - Gómez-Elvira, J.
AU - Herkenhoff, K.
AU - Sánchez-Lavega, A.
AU - de la Torre, M.
AU - Rodríguez-Manfredi, J. A.
AU - Lorenz, R. D.
AU - Pla-García, J.
AU - Hueso, R.
AU - Richardson, M.
AU - Tamppari, L.
AU - Smith, M.
AU - Apéstigue, V.
AU - Toledo, D.
AU - Bell, J.
N1 - Funding Information:
The authors acknowledge and thank the Mars 2020 team. The authors would like to thank Editors and two anonymous reviewers for their constructive reviews, which greatly improved this manuscript. This work was supported by the Spanish Ministry of Science and Innovation, under project RTI2018‐098728‐B‐C31. The derived data presented in this work were processed in the DPS24PA system, which is supported by project no. DV2020‐ATM‐A01. Part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). The UPV/EHU team was supported by Grant PID2019‐109467GB‐I00 funded by 1042 MCIN/AEI/10.13039/501100011033 and by Grupos Gobierno Vasco IT1742‐22.
Funding Information:
The authors acknowledge and thank the Mars 2020 team. The authors would like to thank Editors and two anonymous reviewers for their constructive reviews, which greatly improved this manuscript. This work was supported by the Spanish Ministry of Science and Innovation, under project RTI2018-098728-B-C31. The derived data presented in this work were processed in the DPS24PA system, which is supported by project no. DV2020-ATM-A01. Part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). The UPV/EHU team was supported by Grant PID2019-109467GB-I00 funded by 1042 MCIN/AEI/10.13039/501100011033 and by Grupos Gobierno Vasco IT1742-22.
Publisher Copyright:
© 2022. The Authors.
PY - 2022/12
Y1 - 2022/12
N2 - This is the first part of a two-part paper. NASA's Mars 2020 Perseverance rover measured winds on the Jezero crater floor close to the delta of an ancient river. A mostly repeatable diurnal cycle was observed and presented two regimes: (a) a convective regime, from dawn to sunset, with average easterly to southeasterly winds, during which maximum wind speeds were measured, and (b) a nighttime regime with westerly-northwesterly winds followed by a relatively calm period with highly variable wind directions as a function of sol and time of night. The timing and magnitude of the observed regimes are consistent with primary control by regional and local slope flows. Data suggest that the surface circulation at Jezero region in northern spring and summer is highly unaffected by large-scale circulation except during particular periods in the diurnal cycle or generally during dust storms, which is supported by MarsWRF model simulations. Consequently, the observed seasonal variability was weak. However, sol-to-sol and seasonal variability were measured, most of it during certain nighttime periods. Traveling waves consistent with baroclinic instability were clearly observed in surface winds at Ls ∼ 75°. The early MY36/2022A regional dust storm at Ls ∼ 153° disturbed the wind patterns with changes suggesting enhanced tidal flows. After sunset, the dust storm also produced detectable gravity wave activity, increasing the mixing in the nighttime planetary boundary layer during storm conditions. Inferred wind directions from dust devil movies strongly suggest that prevailing winds continued to be slope-driven during the late summer, fall and early winter seasons.
AB - This is the first part of a two-part paper. NASA's Mars 2020 Perseverance rover measured winds on the Jezero crater floor close to the delta of an ancient river. A mostly repeatable diurnal cycle was observed and presented two regimes: (a) a convective regime, from dawn to sunset, with average easterly to southeasterly winds, during which maximum wind speeds were measured, and (b) a nighttime regime with westerly-northwesterly winds followed by a relatively calm period with highly variable wind directions as a function of sol and time of night. The timing and magnitude of the observed regimes are consistent with primary control by regional and local slope flows. Data suggest that the surface circulation at Jezero region in northern spring and summer is highly unaffected by large-scale circulation except during particular periods in the diurnal cycle or generally during dust storms, which is supported by MarsWRF model simulations. Consequently, the observed seasonal variability was weak. However, sol-to-sol and seasonal variability were measured, most of it during certain nighttime periods. Traveling waves consistent with baroclinic instability were clearly observed in surface winds at Ls ∼ 75°. The early MY36/2022A regional dust storm at Ls ∼ 153° disturbed the wind patterns with changes suggesting enhanced tidal flows. After sunset, the dust storm also produced detectable gravity wave activity, increasing the mixing in the nighttime planetary boundary layer during storm conditions. Inferred wind directions from dust devil movies strongly suggest that prevailing winds continued to be slope-driven during the late summer, fall and early winter seasons.
UR - http://www.scopus.com/inward/record.url?scp=85145856102&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85145856102&partnerID=8YFLogxK
U2 - 10.1029/2022JE007522
DO - 10.1029/2022JE007522
M3 - Article
AN - SCOPUS:85145856102
SN - 2169-9097
VL - 127
JO - Journal of Geophysical Research: Planets
JF - Journal of Geophysical Research: Planets
IS - 12
M1 - e2022JE007522
ER -