地球科学最新文献

{"title":"The ENSO Modulated Wave Climate Over the Northern South China Sea Under the Collective Impact of Monsoon and Tropical Cyclones","authors":"Qianru Niu,&nbsp;Yanqing Feng,&nbsp;Si Chen,&nbsp;Yan Li,&nbsp;Jianghua Lv,&nbsp;Hanxiang Su,&nbsp;Lin Mu","doi":"10.1029/2024JC020966","DOIUrl":"https://doi.org/10.1029/2024JC020966","url":null,"abstract":"<p>Using 30-year simulations (1990–2020) with a validated third-generation wave model, we investigated how El Niño-Southern Oscillation (ENSO) drives seasonal wave climate variability in the northern South China Sea (SCS). Results reveal distinct ENSO impacts across seasons. Spring/winter waves respond to monsoon shifts, with El Niño reducing wave heights and La Niña amplifying extreme waves (the 95th-percentile significant wave heights, <i>H</i>_<i>s95</i>) via intensified winter monsoon. An exception occurs in the Gulf of Tonkin, where El Niño elevates <i>H</i>_<i>s95</i> during the winter monsoon season through localized resonance. Summer/fall waves vary with ENSO's reorganization of tropical cyclone (TC) tracks aligning with ENSO-modulated subtropical ridge changes. Specifically, Eastern Pacific (EP) El Niño concentrates TC near the Luzon Strait, boosting extreme waves in the northeast SCS. Fall coastal energy declines under EP El Niño corresponding to the suppressed basin-wide TC activity. The findings advance predictive insights for the wave climate in monsoon and TC-driven subtropical marginal seas under ENSO variability, addressing the need for localized climate adaptation strategies in marginal seas that are under multi-scale atmospheric forcing.</p>","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 7","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Global Structure of the Cislunar Magnetotail and Its Evolution During Substorms","authors":"M. I. Sitnov,&nbsp;G. K. Stephens,&nbsp;A. V. Artemyev,&nbsp;T. Motoba,&nbsp;N. A. Tsyganenko","doi":"10.1029/2025JA034018","DOIUrl":"https://doi.org/10.1029/2025JA034018","url":null,"abstract":"&lt;p&gt;So far, the structure and dynamics of the terrestrial magnetotail have largely been investigated within &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;31&lt;/mn&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;R&lt;/mi&gt;\u0000 &lt;mi&gt;E&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; $31{R}_{E}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;R&lt;/mi&gt;\u0000 &lt;mi&gt;E&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${R}_{E}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; is the Earth's radius) because of the lack of in-situ observations beyond that distance, as well as limitations of earlier empirical models. Here we reconstruct the global structure of the cislunar tail within &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;65&lt;/mn&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;R&lt;/mi&gt;\u0000 &lt;mi&gt;E&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; $65{R}_{E}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; using 2011–2023 data from the ARTEMIS mission, the 2010 THEMIS-ARTEMIS transition orbits and other missions, such as IMP-8 and Geotail. The reconstruction is made using a new-generation data mining-based empirical algorithm with minimal ad hoc assumptions on the structure of the equatorial current sheet and its evolution during storms and substorms. It is found that the cislunar tail has a regular structure, stable in the substorm growth phase and regularly changing during the expansion and recovery phases. Substorms likely involve the formation of an X-line around &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;40&lt;/mn&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;R&lt;/mi&gt;\u0000 &lt;mi&gt;E&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; $40{R}_{E}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; and magnetic flux accumulation earthward of it, which persists in the growth phase and flattens out after the substorm onset. Consistent with earlier reconstructions of the shorter tail region, the present ones reveal the near-Earth dipolarization of the magnetic field earthward of &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∼&lt;/mo&gt;\u0000 &lt;mn&gt;17&lt;/mn&gt;\u0000 ","PeriodicalId":15894,"journal":{"name":"Journal of Geophysical Research: Space Physics","volume":"130 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025JA034018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Framework to Quantify Drought Recovery Time Accounting for the Lagged Effect","authors":"Qian Zhu,&nbsp;Qing Wei,&nbsp;Ye Tian,&nbsp;Xichao Gao,&nbsp;Zhiyong Liu,&nbsp;Tiantian Yang","doi":"10.1002/hyp.70194","DOIUrl":"https://doi.org/10.1002/hyp.70194","url":null,"abstract":"<div>\u0000 \u0000 <p>Recovery time of ecosystems from drought is an important index to assess drought impacts and ecosystem resilience. The lagged effect reflects the drought resistance capacity of ecosystems and indicates the initial characteristic of drought recovery. However, prior studies quantifying drought recovery time overlooked the lagged effect. This study proposes a new method to quantify drought recovery time, which, for the first time, takes the lagged effect of drought on ecosystems into account. It categorises the progress from the onset of drought to the end of drought recovery into two distinct phases: the lag phase and the dynamic recovery phase, which are then integrated with drought duration to ascertain the post-drought recovery time (RT_p). Integrating the lagged effect into the quantification of RT_p facilitates the establishment of a coherent relationship between drought indices and recovery criteria, which typically rely on distinct parameters. Yangtze River Basin (YRB), the largest basin in China, is used as the case to validate our method. The results in YRB indicate that incorporating the lagged effect improves the accuracy of RT_p estimation and alleviates the discrepancies in its spatial–temporal distribution as assessed by three different drought recovery criteria. In contrast to prior research, this novel approach can also identify cases which achieve recovery before the end of drought events, a phenomenon predominantly observed in regions with low drought resistance. Our proposed method helps to reconcile the contradictory conclusions on quantifying global RT_p. As such, it appears to be a novel method that contributes to a more thorough comprehension of the drought recovery process.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Merger of a Supercell and Squall Line in the Great Plains. 1: Initiation of the Supercell","authors":"Hongpei Yang,&nbsp;Yu Du,&nbsp;Juanzhen Sun","doi":"10.1029/2024JD042393","DOIUrl":"https://doi.org/10.1029/2024JD042393","url":null,"abstract":"<p>Using a four-dimensional variational data assimilation system that incorporates radar and surface observations, we investigated the initiation mechanism of a nocturnal supercell in the central Great Plains on 23 May 2020. This pristine convection occurred ahead of an eastward-propagating squall line, despite the absence of discernible surface convergence, and later evolved into a supercell that eventually merged with the approaching squall line. The atmospheric environment, which featured a low-level inversion layer with considerable convective inhibition, was generally unfavorable for surface-based convective initiation (CI). However, our analysis indicated that the spatial heterogeneous nocturnal southerly low-level jet (LLJ) played a key role in the elevated CI. As the LLJ advected moisture and warm air, neighboring regions experienced substantial low-level destabilization. Multiple convergence bands associated with the heterogeneous LLJ were identified, and the timing and location of CI were governed by these bands. CI occurred when one of the convergence bands moved northward to a position beneath a divergence band at the entrance of the mid-tropospheric jet. This overlapping pattern of convergence-divergence persisted for over an hour, facilitating both the initiation and development of the supercell. Additionally, we observed two other episodes of CI ahead of the squall line, each with different characteristics. The first, occurring earlier than the supercell initiation, was triggered by topographic convergence in a valley but quickly dissipated. Later, as the LLJ rotated clockwise, the most prominent convergence band shifted eastward, favoring the continuous development of forward-building cells ahead of the squall line, resulting in a T-shaped system.</p>","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 13","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2024 Surprise Inlet Landslides: Insights From a Prototype Landslide-Triggered Tsunami Monitoring System in Prince William Sound, Alaska","authors":"Ezgi Karasözen,&nbsp;Michael E. West,&nbsp;Katherine R. Barnhart,&nbsp;John J. Lyons,&nbsp;Terry Nichols,&nbsp;Lauren N. Schaefer,&nbsp;Bohyun Bahng,&nbsp;Summer Ohlendorf,&nbsp;Dennis M. Staley,&nbsp;Gabriel J. Wolken","doi":"10.1029/2025GL115911","DOIUrl":"https://doi.org/10.1029/2025GL115911","url":null,"abstract":"<p>Alaska's coastal communities face growing landslide hazards owing to glacier retreat and extreme weather intensified by the warming climate, yet hazard monitoring remains challenging. As part of ongoing experimental monitoring in Prince William Sound, we detected three large landslides (0.5–2.3 M m³) at Surprise Inlet on 20 September 2024, within the span of an hour. These events were identified in near real-time through seismic data and later confirmed using satellite imagery, tidal records, and infrasound. The landslides generated a modest tsunami, and a 4 cm wave was recorded by a tide gauge 18 km away, marking the first recorded landslide to reach water since monitoring began in this region in 2021. Here, we examine the detection and interpretation of these landslides using multiple data sources and modeling. We demonstrate the effectiveness of this regional seismic monitoring system and show how complementary instrumentation, where available, can enhance detection capabilities.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 13","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115911","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524487","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}

{"title":"Heat Storage Pattern Linked to the Atlantic Meridional Overturning Circulation Slowdown","authors":"Qiuping Ren,&nbsp;Yuanlong Li,&nbsp;Shineng Hu,&nbsp;Shang-Ping Xie,&nbsp;Yilong Lyu,&nbsp;Fan Wang","doi":"10.1029/2025GL116801","DOIUrl":"https://doi.org/10.1029/2025GL116801","url":null,"abstract":"<p>The Atlantic Ocean has absorbed ∼30% of Earth's excess heat under anthropogenic warming and witnessed enhanced warming since the mid-20th century. Yet, mechanisms governing the Atlantic warming, particularly the role of Atlantic Meridional Overturning Circulation (AMOC), remain uncertain. Through ocean-only and coupled model experiments, we confirm the key role of the weakened AMOC in the enhanced Atlantic heat storage. Physically, the reduced poleward heat transport of AMOC causes an additional heat pile-up in the 15°S–45°N regions with a lag time of ∼10 years. Based on this dynamical linkage, we propose that the regional enhanced heat storage in the 15°S–45°N Atlantic relative to the global average serves as a fingerprint for the long-term AMOC change. The observed heat storage indicates an overall AMOC slowdown by only 1.31 ± 0.39 Sv since the 1950s. Considering the pronounced natural variability, this weak anthropogenic AMOC slowdown probably has not emerged yet.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 13","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116801","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524488","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}

{"title":"A Review of Green's Function Methods for Tracer Timescales and Pathways in Ocean Models","authors":"Thomas W. N. Haine,&nbsp;Stephen M. Griffies,&nbsp;Geoffrey Gebbie,&nbsp;Wenrui Jiang","doi":"10.1029/2024MS004637","DOIUrl":"https://doi.org/10.1029/2024MS004637","url":null,"abstract":"<p>Understanding advective-diffusive dispersal of trace substances in environmental fluids like the global ocean is a ubiquitous challenge in geophysics. Since the turn of the millennium, substantial progress has been made in the theory, implementation in models, and application of such tracers in oceanography. For the first time, this progress is reviewed here in a synthetic way. We focus on tracer techniques in ocean models, including real and virtual tracers that diagnose timescale information, and we emphasize the connection to the Green's function that solves the advection-diffusion equation. Implementation of these techniques in ocean models is explained in an accessible way. We present example applications of these techniques to questions concerning ocean circulation, transport of biogeochemicals, and paleoceanography, including future opportunities.</p>","PeriodicalId":14881,"journal":{"name":"Journal of Advances in Modeling Earth Systems","volume":"17 7","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024MS004637","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tracking the spatial extent of redox variability in the mid-Proterozoic ocean","authors":"Yafang Song, Benjamin J.W. Mills, Fred T. Bowyer, Morten B. Andersen, Frantz Ossa Ossa, Alexander J. Dickson, Jason Harvey, Shuichang Zhang, Xiaomei Wang, Huajian Wang, Donald E. Canfield, Graham A. Shields, Simon W. Poulton","doi":"10.1130/g53447.1","DOIUrl":"https://doi.org/10.1130/g53447.1","url":null,"abstract":"Emerging geochemical evidence suggests considerable redox heterogeneity in the mid-Proterozoic ocean. However, quantitative estimates of the extent of different modes of anoxia remain poorly constrained. Due to their complementary redox-related behavior, uranium and molybdenum isotope data can be combined to reconstruct ancient marine redox landscapes, but this approach has not been applied to the mid-Proterozoic. We present new δ238U and δ98Mo data for marine rocks from the ca. 1.4 Ga Xiamaling Formation, North China craton, together with independent redox indicators (Fe speciation and redox-sensitive trace metals). We find that most samples deposited under oxic or dysoxic conditions retain low U and Mo contents, with δ238U and δ98Mo values indistinguishable from continental crust, demonstrating a dominant detrital signal. By contrast, euxinic samples with authigenic enrichments in U and Mo record the highest authigenic δ238U and δ98Mo values, consistent with efficient reduction of U and Mo. Samples deposited under ferruginous conditions exhibit a wider range of intermediate δ238U and δ98Mo values that generally fall between the (dys)oxic and euxinic end-members. Using a coupled U-Mo isotope mass balance model, we infer limited euxinia (&amp;lt;0.5% of the global seafloor area) but extensive low-productivity (dys)oxic and ferruginous settings in ca. 1.4 Ga oceans. This redox landscape would have provided potentially habitable conditions for eukaryotic evolution in the mid-Proterozoic.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"36 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144547617","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}

{"title":"Unraveling recycling and climate influence on detrital U-Pb geochronology of titanite and apatite: An example from the Gaskiers Glaciation in Newfoundland","authors":"Nicolas Gómez ,&nbsp;David Lowe ,&nbsp;Sebastian Kommescher ,&nbsp;Andrea Mills","doi":"10.1016/j.precamres.2025.107871","DOIUrl":"10.1016/j.precamres.2025.107871","url":null,"abstract":"<div><div>Detrital zircon geochronology is a valuable tool for detecting changes in sediment provenance. However, fertility and reworking biases can obscure the identification of distinct detritus sources during glaciation in complex tectonic settings. Apatite and titanite U-Pb geochronology offers a more versatile option, covering a more comprehensive range of host rocks and closure temperature conditions, although weathering and diagenesis majorly affect mineral stability. Decoupling between multi-proxy age spectra and associated trace element variations provides an opportunity to elucidate the effects of glacial conditions on mineral stability and preservation. Here, we used detrital apatite and titanite U-Pb geochronology and trace element geochemistry from Ediacaran glaciogenic strata of the Gaskiers Glaciation in the Bonavista Peninsula of Newfoundland (Avalon Zone) to better understand sediment recycling and source-to-sink dynamics during glacial events.</div><div>Apatite age spectra from the ca. 590 Ma fluvio-glacial Jones Pond and Plate Cove East members yield dominantly 660–630 Ma U-Pb apatite ages. In contrast, apatite spectra from the ca. 590–580 Ma proximal glaciomarine Monk Bay Member and the overlying ca. 580 Ma deglacial Trinity Diamictite are dominated by ca. 600–580 Ma grains, closely approximating depositional ages. The paucity of Ediacaran detrital apatite in periglacial conglomerates compared to their presence of these grains in deglacial strata reflects their preferential dissolution under acidic weathering conditions, implying the advance of glaciers over the Avalonian catchment from ca. 590 to 580 Ma.</div><div>Detrital titanite preserves Archean, Mesoproterozoic, and Tonian single-grain U-Pb ages throughout the same succession, corroborating contributions from older sources within the otherwise Cryogenian–Ediacaran volcanic arc-dominated West Avalonia assemblage. Long-transported detritus is rare, whereas polycyclic apatite and titanite in the studied units indicate a direct sedimentary link between the underlying Connecting Point Group and its Baltican and/or Amazonian cratonic basement sources. Furthermore, detrital titanite results suggest hydrothermal activity and low-grade metamorphic overprints of ca. 540 and 400 Ma, the latter akin to the Acadian Orogeny that affected West Avalonia.</div></div>","PeriodicalId":49674,"journal":{"name":"Precambrian Research","volume":"427 ","pages":"Article 107871"},"PeriodicalIF":3.2,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial accessibility to healthy food in context: Adapting current conceptualizations to a Latin American city","authors":"Leticia Vidal ,&nbsp;Gerónimo Brunet ,&nbsp;Diego Hernández ,&nbsp;Florencia Alcaire ,&nbsp;Lucía Bonilla ,&nbsp;María Costa ,&nbsp;María Rosa Curutchet ,&nbsp;Fernanda Risso ,&nbsp;Sofía Verdier ,&nbsp;Gastón Ares","doi":"10.1016/j.apgeog.2025.103709","DOIUrl":"10.1016/j.apgeog.2025.103709","url":null,"abstract":"<div><div>The study aimed at conceptualizing adequate spatial accessibility to healthy food in Montevideo. The conceptualization was developed following three key steps: i) analysis of observational data on food purchasing behavior, ii) development of an initial definition, iii) validation and refinement with key local stakeholders. Primary data was obtained from a telephone survey with 505 residents to explore food purchasing patterns. Secondary data corresponded to surveys on household expenditure surveys and mobility. Observational data highlighted the diversity of food outlets where residents of Montevideo purchase their food. Small neighborhood stores were identified as key sources of healthy foods, especially for residents of low socio-economic status. Regarding food shopping trips, walking was identified as the main transportation mode. The median travel time was estimated to be 10 min or lower. Areas with adequate spatial accessibility to healthy food in Montevideo were defined as those where residents have access within 600 m to outlets selling all the following food groups: fruits and vegetables, meat, eggs, milk, or culinary ingredients. The methodological approach presented in the current study can be used by other authors to adapt current conceptualizations of spatial accessibility to healthy foods to their local context.</div></div>","PeriodicalId":48396,"journal":{"name":"Applied Geography","volume":"182 ","pages":"Article 103709"},"PeriodicalIF":4.0,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}