National governance structures for REDD+     

Arild Vatn  Paul O. Vedeld 《Global Environmental Change》2013,23(2):422-432

This paper analyses a set of generic options for national REDD+ governance structures – i.e., (a) a market/project based architecture; (b) a system with national REDD+ funds outside existing national administrations; (c) a national REDD+ fund organized under the present administration; and (d) conditional budget support. The analysis is based on experiences from different, but similar governance structures – e.g., the Clean Development Mechanism, payments for ecosystem services, environmental trust funds and various forms of budget support. While a solution with a market/project based structure has been favored by many, we conclude that this is the most problematic alternative. Concerning the other three, the national/local conditions will be of importance for their functioning. If REDD+ policies involve a large part of a county's forested area, establishing a good link to the general forest and other sector policies will be necessary.  相似文献   

U–Pb ID-TIMS dating of igneous and metaigneous rocks from the El-Sibai area: time constraints on the tectonic evolution of the Central Eastern Desert,Egypt     

Lars Eivind Augland  Arild Andresen  Gamal Yehia Boghdady 《International Journal of Earth Sciences》2012,101(1):25-37

This paper presents new ID-TIMS U–Pb zircon and titanite ages from the El-Sibai gneiss complex in the Eastern Desert of Egypt. The zircon data support previous studies, indicating that the protoliths of the gneissic (oldest) units in the area were emplaced during the East African orogeny, and do not represent an older pre-Neoproterozoic, reworked cratonic basement. The crystallization ages of three compositionally distinct orthogneiss protoliths are c. 685, 682 and 679 Ma, respectively. A U–Pb titanite age from one orthogneiss overlaps with the protolith age, indicating that the gneisses did not undergo post-magmatic high-temperature metamorphism. The gneissic textures of the rocks are therefore interpreted to reflect syn-emplacement deformation. This, and evidence for static amphibolite facies metamorphism in country-rock metavolcanics, lead us to conclude that the gneisses of El-Sibai do not represent an exhumed middle crustal gneiss dome, but are part of the island arc affined allochthon into which they were emplaced synchronously with NW-ward nappe translation. We also report ages from rocks cross-cutting the gneisses and the surrounding island arc affined assemblages that yield the hitherto youngest robust pre-Cretaceous intrusive ages in the Eastern Desert. The dated rocks are an anorthosite and a cross-cutting syenogranite giving ages of c. 541 and 540 Ma, respectively. We consider this late magmatic pulse to be anorogenic, most likely reflecting a separate extensional event involving asthenospheric upwelling and decompression melting of the mantle.  相似文献   

THE STATUS OF GEOGRAPHY IN NORWAY     

Arild Holt-Jensen 《The Professional geographer》1985,37(1):90-93

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Rare earth abundances in superferrian eclogites from the Voltri Group (Pennidic Belt,Italy)     

Lauro Morten  Arild O. Brunfelt  Annibale Mottana 《Lithos》1979,12(1):25-32

Ten samples of blueschist facies eclogites occurring as dykes in the ultramafic rocks of the Voltri Group were analysed for eigth rare earth elements (REE). Their patterns are clearly different from those of cognate eclogites enclosed in ultramafic rocks and similar to those of the volcanic rocks dredged from the Mid-Atlantic Ridge (MAR). This similarity confirms both the tholeiitic nature of the magma injected into the Pennidic oceanic basement and metamorphosed to eclogite, and the immobile character of REE during metamorphism up to 10 Kbar and 450°C. Depletion of LREE vs HREE and a positive Eu anomaly in the coarse-grained central portions of the former dykes suggest their derivation from a mush consisting of pyroxene and plagioclase plus trapped superferrian liquid. The high total REE content and the flat pattern of the fine-grained eclogites occurring at the borders of the dykes are consistent with their derivation from a rapidly crystallized superferrian liquid.  相似文献   

Rare earth element geochemistry of the Fen alkaline complex,Norway     

Roger H. Mitchell  Arild O. Brunfelt 《Contributions to Mineralogy and Petrology》1975,52(4):247-259

Determination of rare earth element (REE) abundances in rocks of the Fen complex has shown that within rocks of the first magmatic series REE abundances increase in the order urtiteFen magmas are discussed and it is considered that parental magmas had relatively high La/Yb ratios (40–60). Utilizing petrological evidence from other alkaline complexes coupled with experimental studies it is considered that the parental magma was a carbonated nephelinite produced by limited (<10%) partial melting of the mantle. All the Fen rocks are placed in a petrogentic scheme in which a carbonated nephelinite magma undergoes liquid immiscibility, differentiation and volatile transport.  相似文献   

A Rb-Sr whole rock isochron date on an igneous rock-body from the Stavanger area,South Norway     

Arild Andresen  Knut S. Heier 《International Journal of Earth Sciences》1975,64(1):260-265

The Ormakam-Moldhesten granite, from the Stavanger area, South Norway, has been dated by the Rb-Sr whole rock method. The isochron ages obtained (1180 m.y., 1243 ±160m.y. and 1534±125 m.y.) show that the granite complex is of Precambrian age. The 1543 m. year age is thought to refer to a period of early granulite facies metamorphism, the 1180 m.y. isochron age is taken as the crystallisation age of a later intrusion of biotite granite. This is within the limits of error of the 1160 m.y. metamorphic event shown earlier to have affected the paragneisses in the area. The results demonstrate clearly the allochthonous position of the gneisses and granitic intrusives overlying the fossiliferous Cambrian beds in the Stavanger area. The tectonostratigraphic succession in this area is thus consistent with the observation of Precambrian nappes to the north (Hardangervidda-Ryfylke area).  相似文献   

The Seismic Project of the National Tsunami Hazard Mitigation Program     

David H. Oppenheimer  Alex N. Bittenbinder  Barbara M. Bogaert  Raymond P. Buland  Lynn D. Dietz  Roger A. Hansen  Stephen D. Malone  Charles S. McCreery  Thomas J. Sokolowski  Paul M. Whitmore  Craig S. Weaver 《Natural Hazards》2005,35(1):59-72

In 1997, the Federal Emergency Management Agency (FEMA), National Oceanic and Atmospheric Administration (NOAA), U.S. Geological Survey (USGS), and the five western States of Alaska, California, Hawaii, Oregon, and Washington joined in a partnership called the National Tsunami Hazard Mitigation Program (NTHMP) to enhance the quality and quantity of seismic data provided to the NOAA tsunami warning centers in Alaska and Hawaii. The NTHMP funded a seismic project that now provides the warning centers with real-time seismic data over dedicated communication links and the Internet from regional seismic networks monitoring earthquakes in the five western states, the U.S. National Seismic Network in Colorado, and from domestic and global seismic stations operated by other agencies. The goal of the project is to reduce the time needed to issue a tsunami warning by providing the warning centers with high-dynamic range, broadband waveforms in near real time. An additional goal is to reduce the likelihood of issuing false tsunami warnings by rapidly providing to the warning centers parametric information on earthquakes that could indicate their tsunamigenic potential, such as hypocenters, magnitudes, moment tensors, and shake distribution maps. New or upgraded field instrumentation was installed over a 5-year period at 53 seismic stations in the five western states. Data from these instruments has been integrated into the seismic network utilizing Earthworm software. This network has significantly reduced the time needed to respond to teleseismic and regional earthquakes. Notably, the West Coast/Alaska Tsunami Warning Center responded to the 28 February 2001 Mw 6.8 Nisqually earthquake beneath Olympia, Washington within 2 minutes compared to an average response time of over 10 minutes for the previous 18 years.  相似文献   

Book reviews     

Holt-Jensen  Arild  Tietze  Gunnar 《GeoJournal》1985,10(1):20-46

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The political roots of divergence in carbon market design: implications for linking     

Lars H. Gulbrandsen  Jørgen Wettestad  David G. Victor  Arild Underdal 《Climate Policy》2019,19(4):427-438

There is a substantial literature on optimal emissions trading system (ETS) designs, but relatively little on how organized political interests affect the design and operation of these economic instruments. This article looks systematically at the political economy of the diffusion of ETS designs and explores the implications for carbon-market linking. Contrary to expectations of convergence – as has been observed in many areas where economic policy diffuses across markets – we found substantial divergence in the design and implementation of ETS across the nine systems examined. The architects of these different systems are aware of other designs, but they have purposely adjusted designs to reflect local political and administrative goals. Divergence has sobering implications for visions of ubiquitous linkages and the emergence of a global carbon market that, to date, have been predicated on the assumption that designs would converge. More such ‘real world’ political economy analysis is needed to understand how political forces, mainly within countries, act as strong intervening variables that affect instrument design, implementation and effectiveness.

Key policy insights

• Our finding of design divergence indicates that policy efforts aimed at achieving integrated international markets are unlikely to be successful.

• Visions of carbon market linkage will need to confront the reality that there are well-organized political coalitions, anchored in the status quo, that prefer divergence.

• In linking ETS, policy-makers should devote more attention to preventing excessive capital flows that can undermine political support for linkage, while also creating incentives for convergence in trading rules over time.

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Green corona emission,calcium plage activity and solar sector magnetism     

Arild Gulbrandsen  Einar Gjøen  Helge Dalseide 《Planetary and Space Science》1976,24(9):883-891

The relationship between coronal green line emission and solar sector magnetism has been studied statistically for the years 1965–1969. This period includes the rising portion and the maximum phase of solar cycle no. 20. In the years around solar maximum the results suggest the existence of longitudinal magnetic arcades at the solar sector boundaries. The arcades extend from at least 50°N to 50°S and are flanked by north-south oriented coronal holes about 90° apart. In the rising portion of the cycle the general picture consists of a high green line intensity structure to the west of the boundary and a region of low intensity several days wide to the east of it.Analyses of the calcium plage distribution in the years 1962–1969 show that, on the average, there is a tendency for the plage activity to peak near the sector boundaries. It is further concluded that the activity distribution suggested by Wilcox (1971a, b) is not typical of the behaviour of solar activity relative to the sector boundaries.  相似文献