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  • Wiley  (16)
  • Geography  (16)
  • 1
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    Online Resource
    Do food deserts exist in Calgary, Canada?
    Wiley ; 2015
    In:  Canadian Geographies / Géographies canadiennes Vol. 59, No. 3 ( 2015-09), p. 267-282
    Details
    In: Canadian Geographies / Géographies canadiennes, Wiley, Vol. 59, No. 3 ( 2015-09), p. 267-282
    Abstract: De nombreux travaux de recherche ont étudié l'accessibilité aux supermarchés et ont révélé une association entre les déserts alimentaires et les résidents ayant des besoins criants. Cependant, peu de travaux se sont penchés sur les changements qu'entraîne la prise en compte des marchés de producteurs pour faciliter l'accès à des aliments sains. En outre, peu de chercheurs ont privilégié les communautés composées d'un grand nombre d'enfants et de personnes âgées. Une exploration de la question de l'accessibilité aux supermarchés et aux marchés de producteurs a été menée dans la ville de Calgary, Canada. Deux communautés ayant des populations relativement élevées d'enfants et de personnes âgées, des faibles revenus et un approvisionnement réduit en aliments sains ont été identifiées comme des déserts alimentaires. Il ressort également de l'étude que les marchés de producteurs apportent des bénéfices significatifs aux quartiers environnants, même si l'atténuation des conséquences du manque d'accès à des aliments sains est de portée limitée.
    Type of Medium: Online Resource
    ISSN: 0008-3658 , 1541-0064
    URL: Issue
    URL: Article
    DOI: 10.1111/cag.v59.3
    DOI: 10.1111/cag.12176
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 2066080-7
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  • 2
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    Ultrahigh temperature metamorphism and isobaric cooling of Neoarchean ultramafic‐mafic granulites in the southern granulite terrain, India: Phase equilibrium modelling and SHRIMP zircon U–Pb dating
    Wiley ; 2022
    In:  Journal of Metamorphic Geology Vol. 40, No. 5 ( 2022-06), p. 983-1013
    Details
    In: Journal of Metamorphic Geology, Wiley, Vol. 40, No. 5 ( 2022-06), p. 983-1013
    Abstract: This study presents the results of petrology, SHRIMP zircon U–Pb analysis, conventional Fe–Mg geothermobarometry, REE (rare earth element)‐based geothermobarometry, and phase equilibrium modelling, for newly discovered ultramafic‐mafic granulites (garnet pyroxenite with minor plagioclase and garnet‐bearing granulite) in the Namakkal Block of the southern granulite terrain (SGT), India. Results from this study shed light on the growth, evolution, and thermal state of lower continental crust during the Neoarchean, as a cross‐section of the Archean lower continental crust is well‐exposed in the SGT. SHRIMP zircon U–Pb dating of a garnet pyroxenite sample (18ID‐41) yielded a weighted mean 207 Pb/ 206 Pb age of 2531 ± 6 Ma, which is the same within uncertainty as one weighted mean SHRIMP metamorphic zircon 207 Pb/ 206 Pb age of 2519 ± 9 Ma from mafic granulite sample (18ID‐43). In addition, zircon U–Pb analyses also yielded an apparent 207 Pb/ 206 Pb age of 2474 ± 3 Ma (1σ) for the garnet pyroxenite, and a weighted mean 207 Pb/ 206 Pb age of 2489 ± 8 Ma for the mafic granulite. Thus, the timing of metamorphism of the ultramafic‐mafic granulites was constrained to be ca. 2530–2470 Ma. The peak metamorphic phase assemblage of the garnet pyroxenite is grt–cpx–pl–ilm–liq, which was modelled to be stable at 1058–1172°C/7.8–11.6 kbar, whereas the retrograde mineral assemblage of grt–cpx–hbl–pl–qz–ilm–liq occurred at 877–888°C/9.9–11 kbar. The mafic granulite was demonstrated to record similar peak and retrograde metamorphic P–T conditions to those of the garnet pyroxenite but have a relatively small P–T range of the peak mineral assemblage. The ultrahigh temperature metamorphism of these ultramafic‐mafic granulites was further confirmed by the temperature results (1057–1087°C) from the REE‐in‐two‐pyroxene thermometer. As a result, a retrograde metamorphic P–T path characterized by near‐isobaric cooling from ~1080°C at ~10 kbar to ~900°C at ~10 kbar was constructed for these rocks, which is consistent with an extremely high thermal state that persisted for ca. 60 Ma in the lower crust.
    Type of Medium: Online Resource
    ISSN: 0263-4929 , 1525-1314
    URL: Issue
    URL: Article
    DOI: 10.1111/jmg.v40.5
    DOI: 10.1111/jmg.12654
    RVK:
    RA 1000
    RVK:
    TE 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020499-1
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  • 3
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    A 256‐year‐long precipitation reconstruction for northern Kyrgyzstan based on tree‐ring width
    Wiley ; 2020
    In:  International Journal of Climatology Vol. 40, No. 3 ( 2020-03-15), p. 1477-1491
    Details
    In: International Journal of Climatology, Wiley, Vol. 40, No. 3 ( 2020-03-15), p. 1477-1491
    Abstract: In this study, 85 tree cores from 45 Schrenk spruces ( Picea schrenkiana ) were used to establish a regional tree‐ring chronology. A 256‐year pJune–May precipitation (where p denotes a month from the previous year) for northern Kyrgyzstan in central Asia was reconstructed using this newly developed chronology. The tree‐ring‐based precipitation reconstruction tracks the observed data well ( r = .622, p   〈  .0001, n = 105). Spatial correlation proved that the reconstructed precipitation series contains climatic signals representative of a larger area, including eastern Kyrgyzstan and parts of Kazakhstan. A comparison between the newly reconstructed precipitation series and four tree‐ring‐based precipitation reconstructions for the surrounding areas reveals similar variations, particularly in the high‐frequency domain. Furthermore, this reconstructed precipitation series matches nine flood (1785, 1786, 1792, 1952, 1953, 1970, 1971, 1973, and 2000) and four drought (1917, 1919, 1927, and 1944) events noted in the historical documents and captures a dry decade that occurred in the 1910s in central Asia.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v40.3
    DOI: 10.1002/joc.6280
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1491204-1
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  • 4
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    A statistical study of pre‐summer hourly extreme rainfall over the Pearl River Delta metropolitan region during 2008–2017
    Wiley ; 2020
    In:  International Journal of Climatology Vol. 40, No. 9 ( 2020-07), p. 4242-4258
    Details
    In: International Journal of Climatology, Wiley, Vol. 40, No. 9 ( 2020-07), p. 4242-4258
    Abstract: In this study, we explored the hourly extreme rainfall over the Pearl River Delta metropolitan region (PRDMR) by performing a statistical analysis on a 10‐year hourly precipitation dataset combined with the fifth generation of ECMWF atmospheric hourly reanalysis (ERA‐5) and half‐hourly FengYun‐2 geostationary satellite observations during the pre‐summer rainy season from 2008 to 2017. Results showed that hourly extreme rainfall events over the PRDMR increased at a significant pace during the most recent 10 years, which frequently occurred during the early morning (0400–0900 local standard time [LST; UTC + 8 hr]) and afternoon (1300–1800 LST) over the central urban district and 100‐km downstream area. Comparative analysis of the meteorological conditions between the two peak periods revealed that the hourly extreme rainfall events over the PRDMR during the pre‐summer rainy season were overall prefrontal rainstorms that occurred under the influence of dominant south‐westerlies and weak easterly backflows of warm‐moist air at lower atmospheres. The hot plumes rooted at the urban surface may be the key local environmental factors responsible for generating hourly heavy rainfall over the PRDMR. Given favourable large‐scale conditions, the interaction of urban heat island effects with sea breezes and mountain‐valley breezes can promote convection by altering the thermodynamic and dynamic structures around the PRDMR. By comparison, the hourly extreme rainfall events that occurred during morning periods over the PRDMR were more sensitive to moderate to strong wind shear at the lower planetary boundary layer, whereas those that occurred during afternoon periods were more likely to occur in the presence of an environment with high conditional instability.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v40.9
    DOI: 10.1002/joc.6457
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1491204-1
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  • 5
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    The Nonlinear trend of runoff and its response to climate change in the Aksu River, western China
    Wiley ; 2011
    In:  International Journal of Climatology Vol. 31, No. 5 ( 2011-04), p. 687-695
    Details
    In: International Journal of Climatology, Wiley, Vol. 31, No. 5 ( 2011-04), p. 687-695
    Abstract: The nonlinear trend of runoff and its response to climate change in the Aksu River were identified and evaluated using several selected methods, including grey relation analysis, wavelet analysis, and regression analysis. The time series of runoff and related climate variables from two hydrologic stations and four meteorological stations during 1959–2005 for the Aksu River were used to construct and test empirical models. The key findings of this study indicate that although the time series of the runoff, temperature and precipitation present nonlinear trends, the runoff exhibits a linear correlation with the temperature and precipitation. These results reveal that there is a close relationship between variations in the annual runoff of the Aksu River and regional climate change; in other words, the nonlinear trends of the variations in the runoff is the response to that of regional climate change. The details supporting the key findings are as follows: (1) The annual runoff presented nonlinear trends that depend on time scales, which appeared to have resulted from the regional climate changes that occurred during the study period. (2) The periodicity of changes in runoff, temperature, and precipitation are closely correlated, that of annual runoff occurred on 24‐year cycle, whereas annual average temperature and annual precipitation occurred on 23‐ and 25‐year cycles. (3) The annual runoff exhibited a significant, positive correlation with the temperature and precipitation at the 1‐, 2‐, 4‐, and 8‐year temporal scales. Copyright © 2010 Royal Meteorological Society
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v31.5
    DOI: 10.1002/joc.2110
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 1491204-1
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  • 6
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    Influence of the strongest central Pacific El Niño–Southern Oscillation events on the precipitation in eastern China
    Wiley ; 2019
    In:  International Journal of Climatology Vol. 39, No. 6 ( 2019-05), p. 3076-3090
    Details
    In: International Journal of Climatology, Wiley, Vol. 39, No. 6 ( 2019-05), p. 3076-3090
    Abstract: The impact of the strongest central Pacific (CP) El Niño event 2009/2010 and CP La Niña event 1998/1999 from 1979 to 2010 on the precipitation in eastern China has been analysed. During the 2009/2010 CP El Niño event, it is rainy in northern China during maturing winter and decaying spring, but dry during decaying summer. The rainfall centre is located in south China during maturing period and gradually moves northwards, remaining over the Yellow‐Huai River valley during decaying summer. When the 1998/1999 CP La Niña event occurs, northern China is in a state of drought throughout. In south China, dry periods gradually evolve into rainy ones from maturing winter to decaying summer. The two strongest events also have notable impact on the extreme rainfall, and they mainly affect the total rainfall by influencing the extreme precipitation in eastern China. When the 2009/2010 CP El Niño event occurs, the Western Pacific Subtropical High (WPSH) is stronger with a northwards shift, and there is an obvious anticyclonic circulation near the South China Sea and Philippines. Furthermore, during decaying summer, the Pacific–Japan (PJ) wave train shows an eastwards shift comparing to the typical PJ wave train locating from low latitudes to high latitudes, associating with clearly northwardly spreading wave activity fluxes (WAFs) from the equator. When the 1998/1999 CP La Niña event occurs, the WPSH is weaker and retreats eastwards, and there is a noticeable cyclonic circulation around the South China Sea. In decaying spring, the convective activity in the South China Sea is strong, and there are correspondingly significant WAFs spreading from southeastern Asia to north. In decaying summer, northern (southern) China is controlled by anomalous anticyclones (cyclones) with weak (strong) convection, and the WAFs extend northwards to the Yangtze and Huai River valleys.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.2019.39.issue-6
    DOI: 10.1002/joc.6004
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1491204-1
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  • 7
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    Change and attribution of pan evaporation throughout the Qinghai‐Tibet Plateau during 1979–2017 using China meteorological forcing dataset
    Wiley ; 2022
    In:  International Journal of Climatology Vol. 42, No. 3 ( 2022-03-15), p. 1445-1459
    Details
    In: International Journal of Climatology, Wiley, Vol. 42, No. 3 ( 2022-03-15), p. 1445-1459
    Abstract: Pan evaporation ( E pan ) analysis in the Qinghai‐Tibet Plateau (QTP) is important for improving the understanding of the climatic and environmental changes in the QTP and China. However, uneven station coverage, sparse and inconsistent observations hamper the in‐depth understanding of the spatiotemporal E pan patterns throughout the QTP over long time periods. Based on the PenPan model driven by the monthly gridded China meteorological forcing dataset, this study attempted to estimate monthly and annual grid pan evaporation ( E PenPan ) for the pan with a depth of 10 cm and a diameter of 20 cm at 0.1° resolution throughout the QTP and its surrounding areas during 1979–2017, then the spatiotemporal variations in E PenPan as well as the potential causative climatic variables were thoroughly examined. Results showed that the spatiotemporal patterns of E PenPan were in reasonably good agreement with the observations. The high values of mean annual E PenPan tended to distribute in the areas with water limitation or strong solar radiation like the southwest QTP. The wide decreases in annual E PenPan have reversed in the study area in around 1993, with some exceptions such as the continuous increase in the southwest QTP and monotonous decrease in the areas to the west and east of the Qaidam Basin. Comparatively, the trends in annual E PenPan in the QTP were less than the surrounding areas in the different periods, and overall accelerating annual E PenPan appeared in the both areas after 1993. With the Budyko curve, it was expected that drought severity would increase in the south of the surrounding areas in future, but the warming and wetting in the other areas would be kept. The wind speed ( WS ) was the primary contributor to decreasing annual E PenPan in the study area before 1993. Nevertheless, the most dominant factor for increasing E PenPan was vapour pressure deficit in the QTP and WS in the surrounding areas during 1994–2017.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v42.3
    DOI: 10.1002/joc.7312
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1491204-1
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  • 8
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    The effect of phosphorus content on wheat root‐associated prokaryotic community depends on growth stage and variety
    Wiley ; 2024
    In:  Soil Science Society of America Journal
    Details
    In: Soil Science Society of America Journal, Wiley
    Abstract: The effect of phosphorus (P) content on wheat root‐associated prokaryotic community depends on the growth stage and variety. Low P stress exacerbates community variation among varieties. P addition promotes the formation of mutually beneficial relationships between microorganisms and plants. P‐efficient variety enriches more potential beneficial genera in P‐sufficient soil.
    Type of Medium: Online Resource
    ISSN: 0361-5995 , 1435-0661
    URL: Article
    DOI: 10.1002/saj2.20613
    RVK:
    RA 4845
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 241415-6
    detail.hit.zdb_id: 2239747-4
    detail.hit.zdb_id: 196788-5
    detail.hit.zdb_id: 1481691-X
    SSG: 13
    SSG: 21
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  • 9
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    Massive dolomitization of a late Miocene carbonate platform: a case of mixed evaporative brines with meteoric water, Nijar, Spain
    Wiley ; 1998
    In:  Sedimentology Vol. 45, No. 2 ( 1998-03), p. 263-277
    Details
    In: Sedimentology, Wiley, Vol. 45, No. 2 ( 1998-03), p. 263-277
    Abstract: Late Miocene platform carbonates from Nijar, Spain, have been extensively dolomitized. Limestones are present in the most landward parts of the platform, in stratigraphically lower units and topographically highest outcrops, suggesting that dolomitizing fluids were derived from the adjacent Nijar Basin. The dolomite crystals range from 〈 10 to ≈100 μm existing as both replacements and cements. Na, Cl and SO 4 concentrations in the dolomites range from 200 to 1700 p.p.m., 250–650 p.p.m., and 600–7000 p.p.m., respectively, comparable with other Tertiary and modern brine dolomite values, and also overlapping values from mixing‐zone dolomites. Sr concentrations range between 50 and 300 p.p.m., and the molar Sr/Ca ratios of dolomitizing fluids are estimated to range between 7× seawater brine to freshwater ratios. The δ 18 O and δ 13 C of the dolomites range from −1·0 to +4·2‰ PDB, and −4·0 to +2·0‰ PDB, respectively. 87 Sr/ 86 Sr values (0·70899–0·70928) of the dolomites range from late Miocene seawater to values greater than modern seawater. Mixtures of freshwater with seawater and evaporative brines probably precipitated the Nijar dolomites. Modelled covariations of molar Sr/Ca vs. δ 18 O and Na/Ca vs. δ 18 O from these mixtures are consistent with those of the proposed Nijar dolomitizing fluids. Complete or partial dolomite recrystallization is ruled out by well preserved CL zoning, nonstoichiometry and quantitative water–rock interaction modelling of covariations of Na vs. Sr and δ 18 O vs. δ 13 C. The possibility of multiple dolomitization events induced by evaporative brines, seawater and freshwater, respectively, is consistent with mineral‐mineral mixing modelling. The basin‐derived dolomitizing brines probably mixed with freshwater in the Nijar Basin or mixed with fresh groundwater in the platform, and were genetically related either to deposition of the Yesares gypsum or the Feos gypsum. Dolomitization occurred during either the middle Messinian or the early upper Messinian. Nijar dolomitization models may be applicable to dolomitization of other late Miocene platform carbonates of the western Mediterranean. Moreover, the Nijar models may offer an analogue for more ancient evaporite‐absent platform carbonates fringing evaporite basins.
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Article
    DOI: 10.1046/j.1365-3091.1998.0142e.x
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 1998
    detail.hit.zdb_id: 2020955-1
    detail.hit.zdb_id: 206889-8
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  • 10
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    Temporal variability of precipitation over the Qinghai‐Tibetan Plateau and its surrounding areas in the last 40 years
    Wiley ; 2023
    In:  International Journal of Climatology Vol. 43, No. 4 ( 2023-03-30), p. 1912-1934
    Details
    In: International Journal of Climatology, Wiley, Vol. 43, No. 4 ( 2023-03-30), p. 1912-1934
    Abstract: The Qinghai‐Tibet Plateau (QTP) plays a crucial role in regulating the climate and hydrology over Asia, and studies indicate that the QTP tends to be warm and humid as a whole. Although precipitation variability on the QTP has a great impact on floods, soil erosion, and droughts, it is poorly understood owing to sparse meteorological observations. This study has investigated the temporal variability of precipitation on the QTP and its surrounding areas on different time scales over the past 40 years using the standardized variability index (SVI) based on entropy as well as its changing trends. The results show that the variability of precipitation has different spatial patterns on different time scales. In general, the variability of both the precipitation days and amounts are low in the southeast and northwest corners of the plateau and high in the southwest and north. It was found that the number of light precipitation days in the high vegetation coverage area in the southeastern plateau decreased significantly, but increased greatly in the bare land and sparse vegetation coverage areas in the northern part of the plateau. Such changes are believed to be conducive for ecological restoration. Most importantly, in the southern foothills of the Himalayas, many light precipitation days have turned into moderate and heavy precipitation days, and a significant increase in annual precipitation has also been noted, which are likely to cause natural disasters considering the local topographical conditions, such as landslides and mudslides. Highlights In QTP, SVI ME in May is closer to summer mode, indicating monsoon beginning have advanced to May. Extreme precipitation significantly influences precipitation variability. Daily SVI AE decreases in grassland/barren/sparsely vegetated land, good for ecology. Light rain days increased in bare land/sparse vegetation areas, benefiting vegetation restoration. In southern Himalayas, light rain changed to moderate/heavy rain, leading to natural disasters.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v43.4
    DOI: 10.1002/joc.7953
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1491204-1
    SSG: 14
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