Observations of the South Polar Residual Cap suggest a possible erosion of the cap, leading to an increase of the global mass of the atmosphere. We test this assumption by making the first comparison between Viking 1 and InSight surface pressure data, which were recorded 40\uffc2\uffa0years apart. Such a comparison also allows us to determine changes in the dynamics of the seasonal ice caps between these two periods. To do so, we first had to recalibrate the InSight pressure data because of their unexpected sensitivity to the sensor temperature. Then, we had to design a procedure to compare distant pressure measurements. We propose two surface pressure interpolation methods at the local and global scale to do the comparison. The comparison of Viking and InSight seasonal surface pressure variations does not show changes larger than \uffc2\uffb18\uffc2\uffa0Pa in the CO2 cycle. Such conclusions are supported by an analysis of Mars Science Laboratory (MSL) pressure data. Further comparisons with images of the south seasonal cap taken by the Viking 2 orbiter and MARCI camera do not display significant changes in the dynamics of this cap over a 40\uffc2\uffa0year period. Only a possible larger extension of the North Cap after the global storm of MY 34 is observed, but the physical mechanisms behind this anomaly are not well determined. Finally, the first comparison of MSL and InSight pressure data suggests a pressure deficit at Gale crater during southern summer, possibly resulting from a large presence of dust suspended within the crater.
", "keywords": ["Atmospheric sciences", "550", "Astronomy", "Atmosphere (unit)", "FOS: Mechanical engineering", "Library science", "Oceanography", "01 natural sciences", "CO2 ice", "pressure", "Mars Exploration Program", "Engineering", "Surface pressure", "Storm", "Martian Climate", "Space Suit Design and Ergonomics for EVA", "Martian Atmosphere", "Earth and Planetary Astrophysics (astro-ph.EP)", "Climatology", "Global and Planetary Change", "Geography", "Martian Surface", "Physics", "Geology", "Impact crater", "Condensed matter physics", "Anomaly (physics)", "World Wide Web", "Algorithm", "Satellite Observations", "Residual", "Physical Sciences", "Exploration and Study of Mars", "Astrophysics - Instrumentation and Methods for Astrophysics", "Research Article", "FOS: Physical sciences", "Mars", "Aerospace Engineering", "Pressure gradient", "Environmental science", "[SDU] Sciences of the Universe [physics]", "atmospheric mass", "Meteorology", "Orbiter", "0103 physical sciences", "Instrumentation and Methods for Astrophysics (astro-ph.IM)", "Formation and Evolution of the Solar System", "0105 earth and related environmental sciences", "Pressure system", "CO 2 ice", "Astronomy and Astrophysics", "FOS: Earth and related environmental sciences", "Astrobiology", "Computer science", "Physics and Astronomy", "[SDU]Sciences of the Universe [physics]", "13. Climate action", "Global Methane Emissions and Impacts", "Environmental Science", "cap sublimation", "Water on Mars", "Astrophysics - Earth and Planetary Astrophysics"]}, "links": [{"href": "https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2022JE007190"}, {"href": "https://doi.org/10.1029/2022je007190"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Geophysical%20Research%3A%20Planets", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1029/2022je007190", "name": "item", "description": "10.1029/2022je007190", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1029/2022je007190"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-01-25T00:00:00Z"}}, {"id": "10.1029/2018JE005899", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:17:25Z", "type": "Journal Article", "created": "2020-03-09", "title": "Initiation and Flow Conditions of Contemporary Flows in Martian Gullies", "description": "<p>Understanding the initial and flow conditions of contemporary flows in Martian gullies, generally believed to be triggered and fluidized by CO<sub>2</sub> sublimation, is crucial for deciphering climate conditions needed to trigger and sustain them. We employ the RAMMS (RApid Mass Movement Simulation) debris flow and avalanche model to back-calculate initial and flow conditions of recent flows in three gullies in Hale crater. We infer minimum release depths of 1.0&#8211;1.5 m and initial release volumes of 100&#8211;200 m<sup>3</sup>. Entrainment leads to final flow volumes that are 2.5&#8211;5.5 times larger than initially released, and entrainment is found necessary to match the observed flow deposits. Simulated mean cross-channel flow velocities decrease from 3&#8211;4 m s<sup>-1</sup> to ~1 m s<sup>-1</sup> from release area to flow terminus, while flow depths generally decrease from 0.5&#8211;1 m to 0.1&#8211;0.2 m. The mean cross-channel erosion depth and deposition thicknesses are _0.1&#8211;0.3 m. Back-calculated dry-Coulomb friction ranges from 0.1 to 0.25 and viscous turbulent friction between 100&#8211;200 m s<sup>-2</sup>, which are values similar to those of granular debris flows on Earth. These results suggest that recent flows in gullies are fluidized to a similar degree as are granular debris flows on Earth. Using a novel model for mass-flow fluidization by CO<sub>2</sub> sublimation we are able to show that under Martian atmospheric conditions very small volumetric fractions of CO<sub>2</sub> of ~1% within mass flows may indeed yield sufficiently large gas fluxes to cause fluidization and enhance flow mobility.</p>
", "keywords": ["Atmospheric Science", "550", "[SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology", "0211 other engineering and technologies", "Soil Science", "Mars", "Hale crater", "02 engineering and technology", "Aquatic Science", "carbon dioxide; gullies; Hale crater; Mars; modeling; RAMMS", "551", "Oceanography", "01 natural sciences", "[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology", "Geochemistry and Petrology", "Earth and Planetary Sciences (miscellaneous)", "SDG 13 - Climate Action", "Research Articles", "Water Science and Technology", "Earth-Surface Processes", "0105 earth and related environmental sciences", "Ecology", "Palaeontology", "carbon dioxide", "Forestry", "modeling", "RAMMS", "Geophysics", "Space and Planetary Science", "13. Climate action", "[SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology", "gullies"]}, "links": [{"href": "http://dro.dur.ac.uk/28802/1/28802.pdf"}, {"href": "http://dro.dur.ac.uk/28802/2/28802.pdf"}, {"href": "https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2018JE005899"}, {"href": "https://doi.org/10.1029/2018JE005899"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Geophysical%20Research%3A%20Planets", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1029/2018JE005899", "name": "item", "description": "10.1029/2018JE005899", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1029/2018JE005899"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-08-01T00:00:00Z"}}, {"id": "10.1038/s41467-017-00192-5", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:17:32Z", "type": "Journal Article", "created": "2017-08-02", "title": "Zhamanshin astrobleme provides evidence for carbonaceous chondrite and post-impact exchange between ejecta and Earth\u2019s atmosphere", "description": "AbstractChemical fingerprints of impacts are usually compromised by extreme conditions in the impact plume, and the contribution of projectile matter to impactites does not often exceed a fraction of per cent. Here we use chromium and oxygen isotopes to identify the impactor and impact-plume processes for Zhamanshin astrobleme, Kazakhstan. \uffce\uffb554Cr values up to 1.54 in irghizites, part of the fallback ejecta, represent the54Cr-rich extremity of the Solar System range and suggest a CI-like chondrite impactor. \uffce\uff9417O values as low as \uffe2\uff88\uff920.22\uffe2\uff80\uffb0 in irghizites, however, are incompatible with a CI-like impactor. We suggest that the observed17O depletion in irghizites relative to the terrestrial range is caused by partial isotope exchange with atmospheric oxygen (\uffce\uff9417O\uffe2\uff80\uff89=\uffe2\uff80\uff89\uffe2\uff88\uff920.47\uffe2\uff80\uffb0) following material ejection. In contrast, combined \uffce\uff9417O\uffe2\uff80\uff93\uffce\uffb554Cr data for central European tektites (distal ejecta) fall into the terrestrial range and neither impactor fingerprint nor oxygen isotope exchange with the atmosphere are indicated.
", "keywords": ["OXYGEN-ISOTOPE COMPOSITION", "NORDLINGER RIES IMPACT", "ORIGIN", "FRACTIONATION", "carbonaceous chondrite; post-impact exchange; ejecta; Earth\u2019s atmosphere", "Science", "Q", "TARGET ROCKS", "[SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]", "551", "01 natural sciences", "Article", "IVORY-COAST TEKTITES", "13. Climate action", "CRATER", "GLASSES", "ELEMENTS", "WATER", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://www.nature.com/articles/s41467-017-00192-5.pdf"}, {"href": "https://doi.org/10.1038/s41467-017-00192-5"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature%20Communications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/s41467-017-00192-5", "name": "item", "description": "10.1038/s41467-017-00192-5", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/s41467-017-00192-5"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-08-09T00:00:00Z"}}, {"id": "10.1111/maps.12922", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:18:46Z", "type": "Journal Article", "created": "2017-07-27", "title": "Implications for behavior of volatile elements during impacts-Zinc and copper systematics in sediments from the Ries impact structure and central European tektites", "description": "AbstractMoldavites are tektites genetically related to the Ries impact structure, located in Central Europe, but the source materials and the processes related to the chemical fractionation of moldavites are not fully constrained. To further understand moldavite genesis, the Cu and Zn abundances and isotope compositions were measured in a suite of tektites from four different substrewn fields (South Bohemia, Moravia, Cheb Basin, Lusatia) and chemically diverse sediments from the surroundings of the Ries impact structure. Moldavites are slightly depleted in Zn (~10\uffe2\uff80\uff9320%) and distinctly depleted in Cu (>90%) relative to supposed sedimentary precursors. Moreover, the moldavites show a wide range in \uffce\uffb466Zn values between 1.7 and 3.7\uffe2\uff80\uffb0 (relative to JMC 3\uffe2\uff80\uff900749 Lyon) and \uffce\uffb465Cu values between 1.6 and 12.5\uffe2\uff80\uffb0 (relative to NIST SRM 976) and are thus enriched in heavy isotopes relative to their possible parent sedimentary sources (\uffce\uffb466Zn\uffc2\uffa0=\uffc2\uffa0\uffe2\uff88\uff920.07 to +0.64\uffe2\uff80\uffb0; \uffce\uffb465Cu\uffc2\uffa0=\uffc2\uffa0\uffe2\uff88\uff920.4 to +0.7\uffe2\uff80\uffb0). In particular, the Cheb Basin moldavites show some of the highest \uffce\uffb465Cu values (up to 12.5\uffe2\uff80\uffb0) ever observed in natural samples. The relative magnitude of isotope fractionation for Cu and Zn seen here is opposite to oxygen\uffe2\uff80\uff90poor environments such as the Moon where Zn is significantly more isotopically fractionated than Cu. One possibility is that monovalent Cu diffuses faster than divalent Zn in the reduced melt and diffusion will not affect the extent of Zn isotope fractionation. These observations imply that the capability of forming a redox environment may aid in volatilizing some elements, accompanied by isotope fractionation, during the impact process. The greater extent of elemental depletion, coupled with isotope fractionation of more refractory Cu relative to Zn, may also hinge on the presence of carbonyl species of transition metals and electromagnetic charge, which could exist in the impact\uffe2\uff80\uff90induced high\uffe2\uff80\uff90velocity jet of vapor and melts.
", "keywords": ["550", "GRANITES", "NDAS", "Ries crater", "01 natural sciences", "Tektites", "ZINC", "[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "QE", "14. Life underwater", "STABLE-ISOTOPE GEOCHEMISTRY", "QC", "0105 earth and related environmental sciences", "Copper isotopes", "ORIGIN", "AUSTRALASIAN TEKTITES", "FRACTIONATION", "IRON", "500", "LACHLAN FOLD BELT", "Ries area sediments", "QE Geology", "Impact", "QC Physics", "13. Climate action", "Volatile loss", "ZN", "Isotope fractionation", "Zinc isotopes", "CU"]}, "links": [{"href": "http://onlinelibrary.wiley.com/wol1/doi/10.1111/maps.12922/fullpdf"}, {"href": "https://doi.org/10.1111/maps.12922"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Meteoritics%20%26amp%3B%20Planetary%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/maps.12922", "name": "item", "description": "10.1111/maps.12922", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/maps.12922"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-07-27T00:00:00Z"}}, {"id": "10.1111/maps.13312", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:18:46Z", "type": "Journal Article", "created": "2019-06-10", "title": "Identification of a meteoritic component using chromium isotopic composition of impact rocks from the Lonar impact structure, India", "description": "AbstractThe existence of mass\uffe2\uff80\uff90independent chromium isotope variability of nucleosynthetic origin in meteorites and their components provides a means to investigate potential genetic relationship between meteorites and planetary bodies. Moreover, chromium abundances are depleted in most surficial terrestrial rocks relative to chondrites such that Cr isotopes are a powerful tool to detect the contribution of various types of extra\uffe2\uff80\uff90terrestrial material in terrestrial impactites. This approach can thus be used to constrain the nature of the bolide resulting in breccia and melt rocks in terrestrial impact structures. Here, we report the Cr isotope composition of impact rocks from the ~0.57\uffc2\uffa0Ma Lonar crater (India), which is the best\uffe2\uff80\uff90preserved impact structure excavated in basaltic target rocks. Results confirm the\uffc2\uffa0presence of a chondritic component in several bulk rock samples of up to 3%. The impactor that created the Lonar crater had a composition that was most likely similar to that of carbonaceous chondrites, possibly a CM\uffe2\uff80\uff90type chondrite.
", "keywords": ["TERRESTRIAL", "TARGET ROCKS", "SYSTEMATICS", "KeyWords Plus:TARGET ROCKS", "01 natural sciences", "PROJECTILES", "[SDU] Sciences of the Universe [physics]", "INSIGHTS", "105105 Geochemistry", "13. Climate action", "CRATER", "GLASSES", "105105 Geochemie", "MELT ROCKS", "PETROGRAPHY", "GEOCHEMISTRY", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.13312"}, {"href": "https://doi.org/10.1111/maps.13312"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Meteoritics%20%26amp%3B%20Planetary%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/maps.13312", "name": "item", "description": "10.1111/maps.13312", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/maps.13312"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-06-09T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=crater&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=crater&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=crater&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=crater&offset=6", "hreflang": "en-US"}], "numberMatched": 6, "numberReturned": 6, "distributedFeatures": [], "timeStamp": "2026-05-25T16:27:01.540740Z"}