PMID- 31534881 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 2169-9097 (Print) IS - 2169-9100 (Electronic) IS - 2169-9097 (Linking) VI - 124 IP - 7 DP - 2019 Jul TI - Effects of the MY34/2018 Global Dust Storm as Measured by MSL REMS in Gale Crater. PG - 1899-1912 LID - 10.1029/2019JE005985 [doi] AB - The Rover Environmental Monitoring Station (REMS) instrument that is onboard NASA's Mars Science Laboratory (MSL) Curiosity rover. REMS has been measuring surface pressure, air and ground brightness temperature, relative humidity, and UV irradiance since MSL's landing in 2012. In Mars Year (MY) 34 (2018) a global dust storm reached Gale Crater at L(s) ~190 degrees . REMS offers a unique opportunity to better understand the impact of a global dust storm on local environmental conditions, which complements previous observations by the Viking landers and Mars Exploration Rovers. All atmospheric variables measured by REMS are strongly affected albeit at different times. During the onset phase, the daily maximum UV radiation decreased by 90% between sols 2075 (opacity ~1) and 2085 (opacity ~8.5). The diurnal range in ground and air temperatures decreased by 35K and 56K, respectively, with also a diurnal-average decrease of ~2K and 4K respectively. The maximum relative humidity, which occurs right before sunrise, decreased to below 5%, compared with pre-storm values of up to 29%, due to the warmer air temperatures at night while the inferred water vapor abundance suggests an increase during the storm. Between sols 2085 and 2130, the typical nighttime stable inversion layer was absent near the surface as ground temperatures remained warmer than near-surface air temperatures. Finally, the frequency-domain behavior of the diurnal pressure cycle shows a strong increase in the strength of the semidiurnal and terdiurnal modes peaking after the local opacity maximum, also suggesting differences in the dust abundance inside and outside Gale. FAU - Viudez-Moreiras, D AU - Viudez-Moreiras D AUID- ORCID: 0000-0001-8442-3788 AD - Centro de Astrobiologia (CSIC-INTA) & Spanish National Institute for Aerospace Technology (INTA), Torrejon de Ardoz, Madrid, Spain. FAU - Newman, C E AU - Newman CE AUID- ORCID: 0000-0001-9990-8817 AD - Aeolis Research, 600 N. Rosemead Ave., Suite 205, Pasadena, CA 91106, USA. FAU - de la Torre, M AU - de la Torre M AUID- ORCID: 0000-0003-1393-5297 AD - Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA. FAU - Martinez, G AU - Martinez G AUID- ORCID: 0000-0001-5885-236X AD - University of Michigan, Ann Arbor, Michigan, USA. FAU - Guzewich, S AU - Guzewich S AUID- ORCID: 0000-0003-1149-7385 AD - NASA Goddard Spaceflight Center, Greenbelt, MD, USA. FAU - Lemmon, M AU - Lemmon M AUID- ORCID: 0000-0002-4504-5136 AD - Space Science Institute, College Station, TX 77843 USA. FAU - Pla-Garcia, J AU - Pla-Garcia J AUID- ORCID: 0000-0002-8047-3937 AD - Centro de Astrobiologia (CSIC-INTA) & Spanish National Institute for Aerospace Technology (INTA), Torrejon de Ardoz, Madrid, Spain. FAU - Smith, M D AU - Smith MD AUID- ORCID: 0000-0002-7601-1158 AD - NASA Goddard Spaceflight Center, Greenbelt, MD, USA. FAU - Harri, A-M AU - Harri AM AD - Earth Observation, Finnish Meteorological Institute, Erik Palmenin aukio, Helsinki, Finland. FAU - Genzer, M AU - Genzer M AD - Earth Observation, Finnish Meteorological Institute, Erik Palmenin aukio, Helsinki, Finland. FAU - Vicente-Retortillo, A AU - Vicente-Retortillo A AUID- ORCID: 0000-0002-4553-7624 AD - University of Michigan, Ann Arbor, Michigan, USA. FAU - Lepinette, A AU - Lepinette A AUID- ORCID: 0000-0002-5213-3521 AD - Centro de Astrobiologia (CSIC-INTA) & Spanish National Institute for Aerospace Technology (INTA), Torrejon de Ardoz, Madrid, Spain. FAU - Rodriguez-Manfredi, J A AU - Rodriguez-Manfredi JA AD - Centro de Astrobiologia (CSIC-INTA) & Spanish National Institute for Aerospace Technology (INTA), Torrejon de Ardoz, Madrid, Spain. FAU - Vasavada, A R AU - Vasavada AR AUID- ORCID: 0000-0003-2665-286X AD - Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA. FAU - Gomez-Elvira, J AU - Gomez-Elvira J AD - Centro de Astrobiologia (CSIC-INTA) & Spanish National Institute for Aerospace Technology (INTA), Torrejon de Ardoz, Madrid, Spain. LA - eng GR - N-999999/Intramural NASA/United States PT - Journal Article PL - United States TA - J Geophys Res Planets JT - Journal of geophysical research. Planets JID - 101661797 PMC - PMC6750032 MID - NIHMS1538744 EDAT- 2019/09/20 06:00 MHDA- 2019/09/20 06:01 PMCR- 2020/07/01 CRDT- 2019/09/20 06:00 PHST- 2019/09/20 06:00 [entrez] PHST- 2019/09/20 06:00 [pubmed] PHST- 2019/09/20 06:01 [medline] PHST- 2020/07/01 00:00 [pmc-release] AID - 10.1029/2019JE005985 [doi] PST - ppublish SO - J Geophys Res Planets. 2019 Jul;124(7):1899-1912. doi: 10.1029/2019JE005985.