Journal of Geophysical Research: Planets最新文献_第3页

Volatile and Trace Element Storage in a Crystallizing Martian Magma Ocean 结晶火星岩浆洋中的挥发性元素和痕量元素储量

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-08-13 DOI: 10.1029/2024JE008346

Shi J. Sim, Marc M. Hirschmann, Saswata Hier-Majumder

{"title":"Volatile and Trace Element Storage in a Crystallizing Martian Magma Ocean","authors":"Shi J. Sim, Marc M. Hirschmann, Saswata Hier-Majumder","doi":"10.1029/2024JE008346","DOIUrl":"https://doi.org/10.1029/2024JE008346","url":null,"abstract":"Immediately following core formation on Mars, the planet underwent a magma ocean phase. Volatiles released from the magma ocean fostered a primitive atmosphere which modulated heat loss from the cooling planet through the greenhouse effect. The solidification and degassing of the magma ocean are therefore coupled. In this work, we investigate two important aspects of this evolution: (a) the dynamics of melt trapping at the freezing front of the residual mantle and (b) the oxidation state during crystallization. For crystallization rates applicable to the martian magma, compaction is inefficient, leading to large fractions of melt trapped together with the crystals accumulating in the residual mantle. The H2O content of the martian residual mantle is strongly influenced by dynamic melt trapping. Following magma ocean crystallization, up to 55.4% of the initial H2O in the magma ocean is sequestered in the residual mantle, with the rest outgassed to the surface. Dynamic melt trapping also limits variations in trace element concentrations and fractionations. Resulting variations in important isotopic parent/daughter ratios (Sm/Nd, Lu/Hf) cannot account for all of the isotopic diversity inferred for martian basalt source regions, hence requiring alternative mechanisms. The redox state of the magma ocean exerts a strong control on the total CO2 content of the residual mantle and the time of crystallization. Under oxidizing conditions, the residual mantle stores 0.01% of the delivered CO2 but under the most reducing conditions we examined, the residual mantle can sequester 80.4% in the form of trapped carbonated melt and graphite/diamond.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JE008346","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141980336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mars' North Polar Spiral Trough Migration Paths as Revealed Through 3D Radar Mapping 三维雷达测绘揭示的火星北极螺旋槽迁移路径

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-08-12 DOI: 10.1029/2023JE007996

Kris L. Laferriere, Ali M. Bramson, Isaac B. Smith

{"title":"Mars' North Polar Spiral Trough Migration Paths as Revealed Through 3D Radar Mapping","authors":"Kris L. Laferriere, Ali M. Bramson, Isaac B. Smith","doi":"10.1029/2023JE007996","DOIUrl":"https://doi.org/10.1029/2023JE007996","url":null,"abstract":"We present observations and maps of Mars' northern polar spiral trough migration paths (TMPs) as revealed through the 3D SHARAD (Shallow Radar) data volume, identify patterns of TMP morphology, and provide interpretations and implications of these TMPs on past climate. This data set provides additional spatial context over traditional 2D data as it allows for radargrams to be taken perpendicular to each trough strike, which minimizes distortion of migration paths due to oblique viewing geometry. Here, we present an expanded survey of trough migration and analysis of surface troughs across the north polar layered deposits. We corroborate many previous observations of trough migration such as: the general poleward and stratigraphically upward migration from the TMP initiation point; the broadly similar depth of trough initiation across the cap; regional variability in TMP morphology; and the presence of buried promontories. Our results support the presence of two generations of troughs, though we cannot confirm that the oldest generation originated deeper than ∼600 m beneath the current surface, as previously reported. Two generations of troughs suggest that climate conditions favorable for initiation of trough migration have occurred at least twice. Trough initiation occurring only in the upper ∼600 m suggests that troughs are relatively recent features in the polar cap, developing after the formation of ∼half the current cap height. The mapped TMPs provide insight into the consistency of Mars' climate during the accumulation of the past few hundred meters of ice by recording the boundary of erosion and accumulation of ice at the troughs.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2023JE007996","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ter-Diurnal Atmospheric Tide on Mars 火星上的昼夜大气潮汐

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-08-10 DOI: 10.1029/2024JE008452

Joonas Leino, Ari-Matti Harri, Robert John Wilson, Don Banfield, Mark Lemmon, Mark Paton, Jose-Antonio Rodriguez-Manfredi, Hannu Savijärvi

{"title":"Ter-Diurnal Atmospheric Tide on Mars","authors":"Joonas Leino, Ari-Matti Harri, Robert John Wilson, Don Banfield, Mark Lemmon, Mark Paton, Jose-Antonio Rodriguez-Manfredi, Hannu Savijärvi","doi":"10.1029/2024JE008452","DOIUrl":"https://doi.org/10.1029/2024JE008452","url":null,"abstract":"Cyclic absorption of solar radiation generates oscillations in atmospheric fields. These oscillations are called atmospheric or thermal tides, which are furthermore modified by topography and surface properties. This leads to a complex mix of sun-synchronous and non-sun-synchronous tides that propagate around the planet eastward and westward. This study focuses on analyzing the ter-diurnal component (period of 8 hr) from surface pressure observations by Mars Science Laboratory (MSL), InSight, Viking Lander (VL) 1, and VL2. General Circulation Model (GCM) results are used to provide a global context for interpreting the observed ter-diurnal tide properties. MSL and InSight have a clear and similar seasonal cycle, with local amplitude peaks at around solar longitude (Ls) 60°, Ls 130°, and Ls 320°. The amplitude peak at Ls 320° is related to the annual dust storm, while the Ls 230° dust storm is not detected by either platforms. During global dust storms, MSL, VL1, and VL2 detect their highest amplitudes. The GCM predicts the weakest amplitudes at the equinoxes, while the strongest ones are predicted in summer for both hemispheres. GCM amplitudes tend to differ from the observations but match slightly better around the aphelion season. During this time, model results suggest that the two most prominent modes are the sun-synchronous ter-diurnal tide and an eastward propagating resonantly enhanced Kelvin wave. Simulations with and without the effect of radiative heating by water ice clouds indicate the clouds may play a significant role in forcing the ter-diurnal tide during northern hemisphere summer season.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JE008452","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on the Impact of Solar Flares on the Martian Atmospheric Emissions in the Dayside Near-Terminator Region: Case Studies 太阳耀斑对日侧近终结者区域火星大气排放物影响的调查：案例研究

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-08-10 DOI: 10.1029/2024JE008315

Lot Ram, Ritika Sharma, Diptiranjan Rout, Rahul Rathi, Sumanta Sarkhel

{"title":"Investigation on the Impact of Solar Flares on the Martian Atmospheric Emissions in the Dayside Near-Terminator Region: Case Studies","authors":"Lot Ram, Ritika Sharma, Diptiranjan Rout, Rahul Rathi, Sumanta Sarkhel","doi":"10.1029/2024JE008315","DOIUrl":"https://doi.org/10.1029/2024JE008315","url":null,"abstract":"Solar transient events like flares can cause sudden changes in planetary plasma and neutral environment. However, there is less understanding about their impact on the Martian emissions. Here, we present an investigation of the variability of the Martian atmospheric emissions, viz. OI 130.4 nm, 135.6 nm, CO2+ ultraviolet doublet (UVD), and CO Cameron band (CB) in the dayside near-terminator region during solar flare events. The two X8.2 and M6 class flares during September 2017 on Mars have been selected from existing catalogs. Using data from the imaging ultraviolet spectrograph aboard the Mars Atmosphere and Volatile EvolutioN spacecraft, we examined limb radiance profiles. We observed a significant increase in peak radiance (∼130–140 km) for major emissions with a more pronounced impact beneath the emissions peak during flares compared to quiet time. During solar flares, for 130.4 and 135.6 nm emission, the maximum deviation in radiance beneath peak approaches ∼63% and ∼123%, respectively. Whereas, for CO2+ UVD and CO CB, it is ∼64% and ∼50%, respectively. Additionally, we have presented an average scenario of the dayside near-terminator (solar zenith angle ∼ 70–90°) and observed a notable trend of higher percentage deviation for atomic emissions compared to molecular emissions during flares. Further, our analysis depicts a higher percentage deviation during X8.2 compared to the M6 class flare. This study underscores that during flares, higher irradiance flux and photoelectron impact drive the airglow production processes, leading to enhanced emissions. The case studies offer a novel insight into the significant influence of the varying solar flares intensities on planetary atmospheric emissions.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Orbital Comparison of a Late Mantling Unit on Aeolis Mons With Other Erosion-Resistant Strata Explored by MSL in Gale Crater, Mars 火星盖尔陨石坑 MSL 勘探到的 Aeolis Mons 晚期地层与其他抗侵蚀地层的轨道比较

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-08-09 DOI: 10.1029/2023JE008242

A. Rudolph, B. Horgan, K. Bennett, C. Weitz, R. Sheppard, S. G. Banham, A. B. Bryk, E. Kite, A. Roberts, L. Scuderi

{"title":"An Orbital Comparison of a Late Mantling Unit on Aeolis Mons With Other Erosion-Resistant Strata Explored by MSL in Gale Crater, Mars","authors":"A. Rudolph, B. Horgan, K. Bennett, C. Weitz, R. Sheppard, S. G. Banham, A. B. Bryk, E. Kite, A. Roberts, L. Scuderi","doi":"10.1029/2023JE008242","DOIUrl":"https://doi.org/10.1029/2023JE008242","url":null,"abstract":"Previous investigations along Curiosity's traverse in Gale crater have explored the relationship between orbital and in situ observations. This work aims to better understand the geologic environment of units only observable from orbit and compare them to the properties of units examined by Curiosity. Here, we map an erosion-resistant dark-toned mantling unit that overlies the modern topography of Aeolis Mons (informally known as Mt. Sharp) and compare this unit to two other previously mapped dark-toned resistant units, the marker band and the mound skirting unit (MSU), that have been inferred to represent different geologic environments (lacustrine and aeolian, respectively). Visible to short wave infrared spectra from the Compact Reconnaissance Imaging Spectrometer for Mars and visual images from the High Resolution Imaging Science Experiment and Context Cameras aboard the Mars Reconnaissance Orbiter are used for this comparison. Spectral data suggest a mafic composition with minor alteration, although the composition varies more with location around Mt. Sharp rather than between units. Morphologically, the mantling unit has strong similarities to the marker band based on their consistent low-albedo, erosion-resistance, and smooth appearance, contrasting with the highly variable surface texture of the MSU. We hypothesize that all three units had a similar sediment source but experienced aqueous alteration at different times: early ubiquitous cementation in a surface aqueous environment in the mantling unit and marker band versus patchy late diagenesis in the MSU. If true, these results suggest that water activity continued within the Gale crater long after the erosion of Mt. Sharp.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2023JE008242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crystallographic and Mid-Infrared Spectroscopic Properties of the CaS-MgS Solid Solution CaS-MgS 固溶体的晶体学和中红外光谱特性

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-08-07 DOI: 10.1029/2024JE008483

Maximilian P. Reitze, Christian Renggli, Andreas Morlok, Iris Weber, Uta Rodehorst, Jasper Berndt, Stephan Klemme, Harald Hiesinger

{"title":"Crystallographic and Mid-Infrared Spectroscopic Properties of the CaS-MgS Solid Solution","authors":"Maximilian P. Reitze, Christian Renggli, Andreas Morlok, Iris Weber, Uta Rodehorst, Jasper Berndt, Stephan Klemme, Harald Hiesinger","doi":"10.1029/2024JE008483","DOIUrl":"https://doi.org/10.1029/2024JE008483","url":null,"abstract":"We synthesized the solid solution between the sulfides CaS (oldhamite) and MgS (niningerite). Electron microprobe and X-ray diffraction showed homogeneous and pure samples after the synthesis. The calculated lattice parameters fit to earlier literature data. Mid-infrared spectroscopy of the samples reveal that the produced sulfides were fragile and tend to alternate very fast. However, we were able to provide clean reflectance spectra of all samples. The spectra of un-altered samples show no peaks or bands but a rather constant spectrum within the analyzed spectral range between 7.0 and 12.5 μm. The altered spectra contain signatures of sulfates and carbonates and probably further compounds. The gathered data help to understand the formation conditions of the studies sulfides as it shows that the solvus exists in the CaS-MgS system between 1000°C and 1200°C. In addition, the infrared data will help to improve remote sensing in the mid-infrared of planetary objects that might be covered with sulfide containing material like asteroids or Mercury.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JE008483","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141966794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Constraints on the Origin of the Lunar High-Ti Basalts 月球高钛玄武岩起源的实验约束

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-07-29 DOI: 10.1029/2023JE008239

C. P. Haupt, C. J. Renggli, A. Rohrbach, J. Berndt, S. Klemme

{"title":"Experimental Constraints on the Origin of the Lunar High-Ti Basalts","authors":"C. P. Haupt, C. J. Renggli, A. Rohrbach, J. Berndt, S. Klemme","doi":"10.1029/2023JE008239","DOIUrl":"https://doi.org/10.1029/2023JE008239","url":null,"abstract":"High-pressure and high-temperature experiments were conducted to simulate melting of a hybrid cumulate lunar mantle. The experimental results show that intermediate to high-Ti lunar pyroclastic glasses (>6 wt% TiO2) can be produced by partial melting of lunar cumulates. High-Ti basalts are generated when the ilmenite/clinopyroxene ratios in the lunar mantle cumulates are between 1/1 and 4/1, depending on the degree of melting. The presence of an urKREEP component in the mantle cumulate strongly influences Al2O3/CaO of the melts. The experiments provide strong evidence for the model that the compositional diversity of lunar basalts is a consequence of a gravitational overturn of the lunar interior after the lunar magma ocean had solidified. Ilmenite/clinopyroxene in the cumulate mantle, which generates high-Ti melts at partial melting, do not comprise the ratios in ilmenite-bearing cumulates (IBC), which crystallized after ∼90% solidification of the lunar magma ocean and indicate local accumulation of ilmenite in the overturned lunar mantle. However, to fully match the natural composition of the most primitive lunar samples, secondary processes such as assimilation are still required.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2023JE008239","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ambient Noise Tomography Reveals Asymmetric Impact Damage Zone Beneath Lonar Crater, India: Implications for Oblique Impact Cratering in Heterogeneous Basalt, With Planetary Applications 环境噪声断层扫描揭示了印度洛纳尔陨石坑下方的非对称撞击破坏区：异质玄武岩中斜撞击塌陷的影响，以及行星应用

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-07-27 DOI: 10.1029/2023JE008224

P. Sion Kumari, Sandeep Gupta, P. Senthil Kumar

{"title":"Ambient Noise Tomography Reveals Asymmetric Impact Damage Zone Beneath Lonar Crater, India: Implications for Oblique Impact Cratering in Heterogeneous Basalt, With Planetary Applications","authors":"P. Sion Kumari, Sandeep Gupta, P. Senthil Kumar","doi":"10.1029/2023JE008224","DOIUrl":"https://doi.org/10.1029/2023JE008224","url":null,"abstract":"Meteoroid impacts produce different types of fractures and damage zones beneath impact craters. The 3D geometry of these features reflects the trajectory and energetics of an impact event. In this study, we mapped the impact damage zone beneath the 1.88-km-diameter Lonar crater, emplaced in Deccan basalts, using Ambient Noise Tomography (ANT). A network of 23 broadband seismic stations in and around the crater yielded a 1.2 km deep 3D shear wave velocity (VS) image covering ∼7 km by ∼5 km area. It revealed ∼500–900-m-thick heterogeneous target basalt flows, underlain by an undulating Archean granite-gneiss basement. A substantial reduction in VS is observed beneath the crater. The original crater floor was found at a depth of 400 m below the crater rim, which is filled by impact breccia and lake sediments. Beneath the original floor, we found an oval-shaped, asymmetric 200-m-thick lensoidal low-velocity layer with a tongue-like feature beneath the southwestern ejecta blanket. The damage zone is inferred to have formed as a result of oblique impact, in which the projectile arrived from northeast to southwest direction. The VS reduction in the low-velocity layer was used to calculate the amount of impact damage in it. The oblique impact produced a more elevated southwestern crater rim. Impact-related near-surface fracture zones up to a radial distance of >1 km beneath the ejecta blanket were also found. We suggest that impact damage beneath impact craters on Earth and other planetary bodies may be imaged using ANT.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Planetary-Scale Wave Activity in Venus Cloud Layer Simulated by the Venus PCM 金星 PCM 模拟的金星云层行星尺度波活动

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-07-26 DOI: 10.1029/2023JE008253

Dexin Lai, Sebastien Lebonnois, Tao Li

{"title":"Planetary-Scale Wave Activity in Venus Cloud Layer Simulated by the Venus PCM","authors":"Dexin Lai, Sebastien Lebonnois, Tao Li","doi":"10.1029/2023JE008253","DOIUrl":"10.1029/2023JE008253","url":null,"abstract":"The Venus atmosphere Superrotation (SR) is successfully simulated with the high-resolution (1.25° × 1.25° in longitude and latitude) runs of the Venus Planetary Climate Model (PCM). The results show a clear spectrum and structure of atmospheric waves, primarily with periods of 5.65 and 8.5 days. The simulation reproduces long-term quasi-periodic oscillation of the zonal wind and primary planetary-scale wave seen in observations. These oscillations occur with a period of 163–222 days, although their existence is still debated in observations. The Rossby waves show similarity in wave characteristics and angular momentum (AM) transport due to Rossby-Kelvin instability by comparing the 5.65-day wave in Venus PCM with the 5.8-day wave simulated by AFES-Venus, another Venus General Circulation Model. Similarities are also evident between the 8.5-day wave in Venus PCM and the 7-day wave obtained in AFES-Venus. The long-term variations in the AM budget indicate that the 5.65-day wave is the dominant factor of the oscillation on the SR, and the 8.5-day wave plays a secondary role. When the 5.65-day wave grows, its AM and heat transport are enhanced and accelerate (decelerate) the lower-cloud equatorial jet (cloud-top mid-latitude jets). Meanwhile, the 8.5-day wave weakens, reducing its deceleration effect on the lower-cloud equator. This further suppresses the meridional gradient of the background wind and weakens instability, leading to the decay of the 5.65-day wave. And vice versa when the 5.65-day wave decays.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2023JE008253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimates on the Possible Annual Seismicity of Venus 对金星可能发生的年度地震的估计

IF 3.9 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2024-07-26 DOI: 10.1029/2023JE008048

Iris van Zelst, Julia S. Maia, Ana-Catalina Plesa, Richard Ghail, Moritz Spühler

引用次数: 0