Seismic imaging of staircase layers below the Mediterranean Undercurrent     

Berta Biescas  Larry Armi  Valentí Sallarès  Eulàlia Gràcia 《Deep Sea Research Part I: Oceanographic Research Papers》2010,57(10):1345-1353

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海洋动物体石油烃污染评价标准参考值的探讨   总被引：1，自引：0，他引：1  

贾晓平  林钦  蔡文贵  李纯厚  甘居利 《广东海洋大学学报》1999,(3)

目前,国内外尚无颁布任何海洋生物石油污染评价标准,为了满足海洋生物石油污染评价的需要,本文采用综合分析与毒理学分析相结合的方法,探讨和提出了海洋动物石油污染评价标准参考值,海洋鱼类、贝类和甲壳类的石油污染评价标准参考值（干重）分别为１５、７０ 和２５ ｍ ｇ／ｋｇ。  相似文献   

Luminescence dating of Pleistocene alluvial sediments affected by the Alhama de Murcia fault (eastern Betics,Spain) – a comparison between OSL,IRSL and post‐IR IRSL ages     

Reza Sohbati  Andrew S. Murray  Jan‐Pieter Buylaert  Maria Ortuño  Pedro P. Cunha  Eulàlia Masana 《Boreas: An International Journal of Quaternary Research》2012,41(2):250-262

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Discussion of ‘The Azuara impact structure (Spain): new insights from geophysical and geological investigations’ by K. Ernston and J. Fiebag     

Marc Aurell  Ángle González  A. Pérez  Joan Guimerà  Albert Casas  Ramon Salas 《International Journal of Earth Sciences》1993,82(4):750-755

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The behaviour of vertical flux profiles of NO,O3, and NO2 explained in terms of the photostationary state relationship     

Jordi Vilà-Guerau de Arellano  Michiel van Weele 《Journal of Atmospheric Chemistry》1993,16(3):293-297

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Catalonian precipitation patterns: Principal component analysis and automated regionalization     

G. Fernàndez Mills  X. Lana  C. Serra 《Theoretical and Applied Climatology》1994,49(4):201-212

Summary A principal component analysis (PCA) based on a network including 179 pluviometric gauges is attempted in order to describe the main patterns governing precipitation in Catalonia (NE Spain). This PCA procedure is applied to the interstation covariance matrix and component loadings are then deduced from it and extensively interpreted. PCA results are used immediately after in a Davis and Kalkstein clustering process, leading to a rainfall division. The homogeneity of the different groups obtained is tested by means of the analysis of their spatial and temporal within-group variances.With 8 Figures  相似文献   

新疆天格尔金矿成矿带矿物包裹体研究   总被引：1，自引：0，他引：1  

刘养杰  王润三  王居里  炎金才 《新疆地质》1994,(2)

天格尔金矿成矿带矿物包裹体的均一温度、爆裂温度、成矿压力、气相成分及物理化学条件的研究表明，金矿化可分为两个成矿阶段，矿化深度１～１．５ｋｍ，成矿热液具有酸性还原特性，金是以金硫络合物形式迁移沉淀的。  相似文献   

Statistical and spectral analysis of the wind regime in the area of Catalonia     

Jna. Gavaldà  J. Massons  J. Camps  F. Díaz 《Theoretical and Applied Climatology》1992,46(2-3):143-152

Summary This work presents a statistical study of the wind power potential of three stations in the Catalonia area (Spain) over the 1973–1982 period. These stations correspond to three airports (Barcelona, Palma de Mallorca and Girona), which obviously do not present a high wind power potential and are not the suitable locations for wind power utilization, but which have been chosen for the long record of data stored (10 years). The aim of this work is to provide a model of wind potential in terms of the speed and wind direction, which may be applied to other sites. The wind speed has been modelled by a Weibull distribution function and the wind direction by a normal two-dimensional function. A spectral analysis of both variables has also been carried out. The present study provides an evaluation of the local wind power in the geographic area of Catalonia.With 10 Figures  相似文献   

Use of lichens in detecting environmental risk and in geochemical prospecting     

G. Dongarrà  D. Ottomello  G. Sabatino  M. Triscari 《Environmental Geology》1995,26(3):139-146

This paper provides data on variations in the contents of As, Sb, Ni, V, Pb, Cu, Cr, Au, Zn, Sc, and Al, measured in the thalli of a saxicolous lichen species,Xanthoria calcicola Ochsner s.l., collected in northeastern Sicily, near an industrial zone and along a belt crossing areas of known ores containing sulfides of heavy metals. A total of 91 lichen samples were collected on roof tiles (39) and on rocks (52). In the industrial zone, analysis of lichen thalli revealed high contents of nickel and vanadium, decreasing at increasing distances from the source of contamination. The results have also revealed the versatility ofXanthoria calcicola in geochemical prospecting for heavy metals such as Pb, Zn, As, Au, Sb, Ni, V, and Cu. The contents of these elements in the analyzed lichens highlight the same geochemical associations observed in prospecting surveys on samples of river sediments and identify similar anomalies. Interpretation of data in terms of enrichment factors (EFs) turned out to be particularly useful.  相似文献   

Comparing palaeolimnological and instrumental evidence of climate change for remote mountain lakes over the last 200 years   总被引：8，自引：1，他引：7  

Richard W. Battarbee  John-Arvid Grytnes  Roy Thompson  Peter G. Appleby  Jordi Catalan  Atte Korhola  H.J.B. Birks  Einar Heegaard  Andrea Lami 《Journal of Paleolimnology》2002,28(1):161-179

This paper compares the palaeolimnological evidence for climate change over the last 200 years with instrumental climate data for the same period at seven European remote mountain lakes. The sites are Øvre Neådalsvatn (Norway), Saanajärvi (Finland), Gossenköllesee (Austria), Hagelseewli (Switzerland), Jezero v Ledvici (Slovenia), Estany Redó (Spain, Pyrenees), and Niné Terianske Pleso (Slovakia). We used multiple regression analysis to transfer homogenised lowland air temperature records to each of the sites, and these reconstructions were validated using data from on-site automatic weather stations. These data showed that mean annual temperature has varied over the last 200 years at each site by between 1 and 2 °C, typical of the high frequency variability found throughout the Holocene, and appropriate, therefore, to test the sensitivity of the various proxy methods used. Sediment cores from each site were radiometrically dated using ²¹⁰Pb, ¹³⁷Cs and ²⁴¹Am and analysed for loss-on-ignition, C, N, S, pigments, diatoms, chrysophytes, Cladocera and chironomids. Comparisons between the proxy data and the instrumental data were based on linear regression analysis with the proxy data treated as response variables and the instrumental data (after smoothing using LOESS regressions) as predictor variables. The results showed few clear or consistent patterns with generally low or very low r² values. Highest values were found when the data were compared after smoothing using a broad span, indicating that some of the proxy data were capturing climate variability but only at a relatively coarse time resolution. Probable reasons for the weak performance of the methods used include inaccurate dating, especially for earlier time periods, the influence of confounding forcing factors at some sites e.g., air pollution, earthquakes, and the insensitivity of some methods to low amplitude climate forcing. Nevertheless, there were trends in some proxy records at a number of sites that had a relatively unambiguous correspondence with the instrumental climate records. These included organic matter and associated variables (C and N) and planktonic diatom assemblages at the majority of sites and chrysophytes and chironomids at a few sites. Overall for longer term studies of the Holocene, these results indicate the need to be cautious in the interpretation of proxy records, the importance of proxy method validation, the continuing need to use reinforcing multi-proxy approaches, and the need for careful site and method selection.  相似文献