Climate adaptation at what scale? Multi-level governance,resilience, and coproduction in Saint Louis,Senegal     

Vedeld  Trond  Coly  Adrien  Ndour  Nd&#;ye Mar&#;me  Hellevik  Siri 《Natural Hazards》2015,82(2):173-199

Natural Hazards - This paper utilizes a multi-level governance framework to explain how and at what scale climate adaptation, exemplified by flood risk management, was governed in the medium-scale...  相似文献   

http://www.sciencedirect.com/science/article/pii/S1674987114000061   总被引：7，自引：3，他引：4  

MathewDomeier  TrondH.Torsvik 《地学前缘(英文版)》2014,5(3):303-350

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基于多期DEM和滑坡强度的滑坡风险评估     

薛强  张茂省  孙萍萍  程秀娟  Anders Solheim  Trond Magne Vernang 《地质通报》2013,32(6):925-934

滑坡危险性定量评估是滑坡风险评估中的关键和难点,也是当前国际风险管理研究中的热点问题.以滑坡密集分布的黑方台南塬为研究区,以32处典型滑坡为研究对象,依据多期三维数字高程模型(DEM),提出了一种基于强度的滑坡危险性定量评估技术方法.根据多期三维地形信息的解译及野外调查,编制多期滑坡分布图,计算滑坡活动的频率.利用GIS技术,利用滑坡体积与速度的乘积计算滑坡强度.将滑坡危险性定义为滑坡频率和滑坡强度的乘积,同时调查和分析了黑方台地区各类承灾体的类型、价值及其在相应滑坡强度下的易损性,在此基础上开展了单体滑坡风险评估和黑方台南塬滑坡风险区划.  相似文献   

The effect of diapycnal mixing on the ventilation and CFC-11 uptake in the Southern Ocean     

Yongqi GAO  Helge DRANGE 《大气科学进展》2004,21(5):755-766

1. Introduction Ocean General Circulation Models (OGCMs) arekey tools in the assessment of the future ocean up-take of atmospheric greenhouse gases and heat. Fur-thermore, whereas nature experiences one realisationof the climate state, climate models can be used as alaboratory to produce a multitude of climate realisa-tions, and by that contribute to the understanding ofthe variability and stability properties of the system.It is, in this respect, crucial to evaluate the climatemodels ag…  相似文献   

Plume Generation Zones at the margins of Large Low Shear Velocity Provinces on the core–mantle boundary     

Kevin Burke  Bernhard Steinberger  Trond H. Torsvik  Mark A. Smethurst 《Earth and Planetary Science Letters》2008,265(1-2):49-60

Large Igneous Province (LIP) eruption sites of the past 300 My lie vertically above 1% slow shear wave velocity (V_s) contours bounding the African and Pacific Large Low Shear Velocity Provinces (LLSVPs) at the core–mantle boundary (CMB), or in the cases of the Siberian and Columbia River LIPs, bounding one or other of two smaller, Low Shear Velocity Provinces (LSVPs). Steep gradients in V_s at the CMB coincide with those 1% slow contours. The sites of 24 active hotspot volcanoes project down to the same narrowly defined borders of the LLSVPs at the CMB. Plumes that have generated LIPs and major hotspot volcanoes have risen only from the immediate neighbourhoods of the 1% slow V_s contours at the CMB which thus define Plume Generation Zones (PGZs). PGZs projected vertically upward approximately match the + 10 m elevation contour of the geoid showing that the LLSVPs are a dominant control on the positively elevated geoid. Minima in the frequency distribution of shear wave velocities in the lowermost mantle near V_s = ? 1% indicate that regions with more negative velocities, forming ～ 2% of total mantle mass, are likely to be of material compositionally different from the rest of the mantle. Because all LIP eruption sites with ages younger than 300 Ma lie above the borders of LLSVPs or LSVPs at the CMB, PGZ footprints are inferred to have remained in the same places for the past 300 My. Because no plumes have risen from the interior of the LLSVPs and because no lithospheric slabs have penetrated those bodies the volumes of the LLSVPs are inferred to have also remained unchanged for the past 300 My. Because the LLSVPs are the dominant control on the positively elevated areas of the geoid those too must have remained as they now are since 300 Ma. The LLSVPs are not rising buoyant objects but stable features of the deep mantle. LIPs have been erupted throughout the past 2.5 Gy indicating that PGZs comparable to those of the past 0.3 Gy and LLSVPs (of which PGZs mark the margins at the CMB) have also existed for at least that long. LLSVPs could thus form the isolated reservoir invoked by some to explain the distinctive isotopic compositions of terrestrial rocks. PGZs lie at places where the boundaries of: (i) The outer core, (ii) one of the LLSVPs or LSVPs, and (iii) the seismically faster part of the deep mantle meet. Horizontal temperature gradients across the steeply inclined margins to the LLSVPs, the interiors of which are hotter than the surrounding mantle, at the CMB are key controls for the generation of plumes. Near the CMB the association of the high temperature of the outer core with an inclined thermal boundary layer at the margins of LLSVPs facilitates the generation of mantle plumes in the PGZs.  相似文献   

A revised Palaeozoic apparent polar wander path for Southern Britain (Eastern Avalonia)     

Allan Trench  Trond H. Torsvik 《Geophysical Journal International》1991,104(1):227-233

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On the origin and the tectonic implications of magnetic overprinting of the Old Red Sandstone, Shetland     

T. H. Torsvik  B. A. Sturt  D. M. Ramsay 《Geophysical Journal International》1989,99(3):749-759

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Islandprobleme     

Helge G. Backlund 《International Journal of Earth Sciences》1939,30(6):625-630

Ohne Zusammenfassung  相似文献   

Der postkaledonische paläozoische Vulkanismus in Ostgrönland     

Helge G. Backlund 《International Journal of Earth Sciences》1937,28(5):407-412

Ohne Zusammenfassung  相似文献   

A non‐collisional,accretionary Sveconorwegian orogen     

Trond Slagstad  Nick M. W. Roberts  Mogens Marker  Torkil S. Røhr  Henrik Schiellerup 《地学学报》2013,25(1):30-37

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