Evaluation of trends in extreme temperatures simulated by HighResMIP models across Europe

2020 ◽  
Author(s):  
Gerard van der Schrier ◽  
Antonello Squintu ◽  
Else van den Besselaar ◽  
Eveline van der Linden ◽  
Enrico Scoccimarro ◽  
...  
Keyword(s):  
High Resolution ◽  
Western Europe ◽  
Extreme Values ◽  
Maximum Temperature ◽  
Western Balkans ◽  
North West ◽  
The Balkans ◽  
The North ◽  
Summer Maximum ◽  
Maximum Temperatures

<p>The comparison of simulated climate with observed daily values allows to assess their reliability and the soundness of their projections on the climate of the future. Frequency and amplitude of extreme events are fundamental aspects that climate simulations need to reproduce. In this work six models developed within the High Resolution Model Intercomparison Project are compared over Europe with the homogenized version of the observational E-OBS gridded dataset. This is done by comparing averages, extremes and trends of the simulated summer maximum temperature and winter minimum temperatures with the observed ones.</p><p>Extreme values have been analyzed making use of indices based on the exceedances of percentile-based thresholds. Winter minimum temperatures are generally underestimated by models in their averages (down to -4 deg. C of difference over Italy and Norway) while simulated trends in averages and extreme values are found to be too warm on western Europe and too cold on eastern Europe (e.g. up to a difference of -4% per decade on the number of Cold Nights over Spain). On the other hand the models tend to underestimate summer maximum temperatures averages in Northern Europe and overestimate them in the Mediterranean areas (up to +5 deg. C over the Balkans). The simulated trends are too warm on the North West part and too cold on the South East part of Europe (down to -3%/dec. on the number of Warm Days over Italy and Western Balkans).</p><p>These results corroborate the findings of previous studies about the underestimation of the warming trends of summer temperatures in Southern Europe, where these are more intense and have more impacts.  A comparison of the high resolution models  with the corresponding version in CMIP5 has been performed comparing the absolute biases of extreme values trends. This has shown a slight improvement for the simulation of winter minimum temperatures, while no signs of significant progresses have been found for summer maximum temperatures.</p>

scholarly journals Evaluation of trends in extreme temperatures simulated by HighResMIP models across Europe

2021 ◽  
Vol 56 (7-8) ◽  
pp. 2389-2412
Author(s):  
Antonello A. Squintu ◽  
Gerard van der Schrier ◽  
Else van den Besselaar ◽  
Eveline van der Linden ◽  
Dian Putrasahan ◽  
...  
Keyword(s):  
High Resolution ◽  
Eastern Europe ◽  
Climate Models ◽  
Extreme Values ◽  
Southern Europe ◽  
Western Balkans ◽  
The Balkans ◽  
Summer Maximum ◽  
Summer Temperatures ◽  
Maximum Temperatures

AbstractSimulation of past climate is an important tool for the validation of climate models. The comparison with observed daily values allows us to assess the reliability of their projections on climatic extremes in a future climate. The frequency and amplitude of extreme events are fundamental aspects that climate simulations need to reproduce as they have high impacts on economy and society. The ability to simulate them will help policy makers in taking better measures to face climate change. This work aims at evaluating how six models within the High Resolution Model Intercomparison Project reproduce the trends on extreme indices as they have been observed over Europe in the 1970–2014 period. Observed values are provided by the new homogenized version of the E-OBS gridded dataset. The comparison is performed through the use of indices based on seasonal averages and on exceedances of percentile-based thresholds, focusing on six subregions. Winter-average minimum temperature is generally underestimated by models (down to − 4 °C difference over Italy and Norway) while simulated trends in seasonal averages and extreme values are found to be too cold on Eastern Europe and too warm on Iberia and Southern Europe (e.g. up to a difference of − 4% per decade on the number of Cold Nights over Spain). On the other hand the models tend to overestimate summer maximum temperatures averages in the Mediterranean Area (up to + 5 °C over the Balkans) and underestimate these at higher latitudes. Iberia, Southern and Eastern Europe are simulated with too low trends in average summer temperatures. The simulated trends are too strong on the North West part and too weak on the South East part of Europe (down to − 3%/decade on the number of Warm Days over Italy and Western Balkans). These results corroborate the findings of previous studies about the underestimation of the warming trends of summer temperatures in Southern Europe, where these are more intense and have more impacts. The high-resolution versions of the models are compared to their lower-resolution counterparts, similar to those used in the CMIP5, showing a slight improvement for the simulation of extreme winter minimum temperatures, while no significant progresses have been found for extreme summer maximum temperatures.

Seismic structure of the Cheb Basin from high resolution surveying – data quality assessment and first results

2021 ◽  
Author(s):  
Natalia Banasiak ◽  
Florian Bleibinhaus
Keyword(s):  
High Resolution ◽  
Earthquake Activity ◽  
Seismic Structure ◽  
North West ◽  
The North ◽  
Eger Rift ◽  
First Results ◽  
Ground Roll ◽  
Variscan Granites ◽  
Cheb Basin

<p><span><span>In this study we present data and preliminary results from several shallow high-resolution seismic surveys in the Cheb Basin, CR, a small intracontinental basin in the North-West Bohemian Massif, located at the Western end of the Cenozoic Eger Rift. The area is well known for its intense earthquake activity, with the largest instrumentally recorded magnitude of M</span></span><span><sub><span>L</span></sub></span><span><span>=4.6. Macroseismic reports of local seismicity date back to the early 19</span></span><span><sup><span>th</span></sup></span><span><span> century, with magnitudes possibly above 5. Quaternary volcanoes, CO</span></span><span><sub><span>2</span></sub></span><span><span>-rich moffettes, and the swarm-like occurrence of the earthquakes suggest they are being triggered by crustal fluids. In contrast, most focal mechanisms show a dominant strike-slip component, indicative of tectonics. Investigating the role of fluids in triggering those earthquakes is one of the objectives of an ongoing ICDP program.</span></span></p><p><span>We expect high-resolution images of the basin structure to provide additional constraints regarding the importance of tectonic faulting. To that end, we surveyed several up to 3-km-long reflection and refraction profiles in the basin center across the putative Počátky-Plesná Fault, and at its edge, across the basin-bounding Mariánské Lázně Fault. The up to 350-m-thick basin sediments are mostly of Miocene and Quaternary origin, overlying Paleozoic Variscan units and post-Variscan granites. The main reflectors are around 200-400 ms. The data were collected with a 500-m-long split-spread of single geophones at 2 m spacing, and the raw shots are dominated by ground roll. In this presentation, we will show an overview of the field campaigns and present first results.</span></p>

The case for comparison

2007 ◽  
Author(s):  
Anne Haour
Keyword(s):  
North Sea ◽  
Western Europe ◽  
North West ◽  
The North ◽  
The North Sea ◽  
North Western

This chapter explains the coverage of this book, which is about the comparison of rulers, warriors, traders, and clerics on the central Sahel and the North Sea region. It argues that there was more similarity between north-western Europe and the central Sahel in the few centuries either side of AD 1001 than has hitherto been recognised, and maintains that the nature of the sources has obscured these formative times and left them in the shadow of organised structures. It discusses the interconnectedness of central Sahel and north-west Europe through contacts and shared pre-industrial nature.

DEMETER HIGH RESOLUTION 3D SEISMIC SURVEY—REVITALISED DEVELOPMENT AND EXPLORATION ON THE NORTH WEST SHELF, AUSTRALIA

2006 ◽  
Vol 46 (1) ◽  
pp. 101 ◽  
Author(s):  
K.J. Bennett ◽  
M.R. Bussell
Keyword(s):  
High Resolution ◽  
Seismic Data ◽  
New Technologies ◽  
Seismic Survey ◽  
Future Application ◽  
3D Seismic ◽  
Gas Field ◽  
North West ◽  
The North ◽  
Exploration And Development

The newly acquired 3,590 km2 Demeter 3D high resolution seismic survey covers most of the North West Shelf Venture (NWSV) area; a prolific hydrocarbon province with ultimate recoverable reserves of greater than 30 Tcf gas and 1.5 billion bbls of oil and natural gas liquids. The exploration and development of this area has evolved in parallel with the advent of new technologies, maturing into the present phase of revitalised development and exploration based on the Demeter 3D.The NWSV is entering a period of growing gas market demand and infrastructure expansion, combined with a more diverse and mature supply portfolio of offshore fields. A sequence of satellite fields will require optimised development over the next 5–10 years, with a large number of wells to be drilled.The NWSV area is acknowledged to be a complex seismic environment that, until recently, was imaged by a patchwork of eight vintage (1981–98) 3D seismic surveys, each acquired with different parameters. With most of the clearly defined structural highs drilled, exploration success in recent years has been modest. This is due primarily to severe seismic multiple contamination masking the more subtle and deeper exploration prospects. The poor quality and low resolution of vintage seismic data has also impeded reservoir characterisation and sub-surface modelling. These sub-surface uncertainties, together with the large planned expenditure associated with forthcoming development, justified the need for the Demeter leading edge 3D seismic acquisition and processing techniques to underpin field development planning and reserves evaluations.The objective of the Demeter 3D survey was to re-image the NWSV area with a single acquisition and processing sequence to reduce multiple contamination and improve imaging of intra-reservoir architecture. Single source (133 nominal fold), shallow solid streamer acquisition combined with five stages of demultiple and detailed velocity analysis are considered key components of Demeter.The final Demeter volumes were delivered early 2005 and already some benefits of the higher resolution data have been realised, exemplified in the following:Successful drilling of development wells on the Wanaea, Lambert and Hermes oil fields and identification of further opportunities on Wanaea-Cossack and Lambert- Hermes;Dramatic improvements in seismic data quality observed at the giant Perseus gas field helping define seven development well locations;Considerably improved definition of fluvial channel architecture in the south of the Goodwyn gas field allowing for improved well placement and understanding of reservoir distribution;Identification of new exploration prospects and reevaluation of the existing prospect portfolio. Although the Demeter data set has given significant bandwidth needed for this revitalised phase of exploration and development, there remain areas that still suffer from poor seismic imaging, providing challenges for the future application of new technologies.

scholarly journals The English Occupation of Tangier (1661–1683)

1905 ◽  
Vol 19 ◽  
pp. 61-78 ◽  
Author(s):  
Enid Routh
Keyword(s):  
Western Europe ◽  
West Point ◽  
North West ◽  
The North ◽  
Trade Route ◽  
Charles Ii ◽  
Direct Trade

When Charles II. announced his impending marriage with Catharine of Portugal, the inclusion of Tangier in the Princess's dowry was the most popular clause of the marriage treaty.English hopes ran even higher round the little African port than over the companion gift of Bombay, for Tangier, situated almost on the north-west point of Morocco, lay in the direct trade route from the Levant to Western Europe. The English Consul at Lisbon pointed out that it might from its position become a magazine for all the Levant, a port which would be used by the Spanish West India fleet homeward bound to Seville or Cadiz, in order to avoid the high duties imposed by the Crown of Spain in its own ports—valuable asset this in case of war with Holland, Spain, or France.

The Anthropological Context of Euskaro-Caucasian

2017 ◽  
Vol 21 (1) ◽  
pp. 75-91 ◽  
Author(s):  
John D. Bengtson
Keyword(s):  
Western Europe ◽  
Human Genetics ◽  
Animal Husbandry ◽  
Hunter Gatherers ◽  
The Balkans ◽  
Caucasus Region ◽  
The North ◽  
Caucasian Family ◽  
Balkan Region ◽  
Spread Of Agriculture

The hypothesis that the Basque language is genetically related to languages in the Caucasus region was developed in the 20th century by respected scholars including C. C. Uhlenbeck, Georges Dumézil, and René Lafon, but has recently fallen into disfavour. The author defends the Euskaro-Caucasian hypothesis in a refined model in which Basque (Euskara) is most closely related to the North Caucasian language family (but not “South Caucasian” = Kartvelian). It is maintained that this hypothesis is not only linguistically convincing, supported by hundreds of basic etymologies, sound correspondences, and shared morphology, but is also consistent with recent results in archaeology and human genetics. Among the Euskaro-Caucasian etymologies is a significant number involving small and large cattle, swine, dairying, grain and pulse crops, and tools and methods of processing crops. These lexical fields are consistent with the spread of agriculture and animal husbandry to Western Europe by means of colonisation by bearers of the Cardial (Impressed Ware) Culture who came from the Anatolian (or possibly Balkan) region, and spoke a language related to Proto-North Caucasian. The well-known genetic distinctiveness of the Basques is a result of centuries of low population size, genetic drift and endogamy, rather than purely Paleolithic ancestry. The present-day Basque people represent a genetic amalgam of the Cardial colonists with indigenous hunter-gatherers, but their Euskaro-Caucasian language is colonial, not indigenous, in origin. Basque is the sole remaining descendant of the Euskaro-Caucasian family in Western Europe, but there is evidence (in the form of substratum words) that this colonial language was formerly more widely spread in other nearby regions (Sardinia, parts of Iberia, France, the Alps, Italy, the Balkans, and perhaps beyond).

Loran-C Chains: Determination of Extent of Cover

1988 ◽  
Vol 41 (02) ◽  
pp. 149-173 ◽  
Author(s):  
K. F. Woodman ◽  
J. Juleff ◽  
R. A. Allen
Keyword(s):  
Field Strength ◽  
North Sea ◽  
Western Europe ◽  
Accurate Determination ◽  
Propagation Path ◽  
North West ◽  
The North ◽  
The North Sea ◽  
Geometric Effects

A mainly theoretical study has been undertaken to demonstrate how the extent of cover from a hyperbolic navigation system chain can be evaluated. The impetus for the study was the need to assess how Loran-C could be extended over Western Europe, particularly in the South western Approaches, North Sea, English Channel and Bay of Biscay sea areas.The technique described in this article leads to an accurate determination of the electric field strength at a distance from each transmitting site and takes into account the complexities of the ground-wave propagation path. This field-strength contour is combined with the geometric effects of station siting (expansion factors) to yield a constant S/N contour (–10 dB) which defines the ¼n.m. error and hence the limit of cover for the hyperbolic chain under study.In order to exercise the analytical methods a hypothetical Loran-C chain was studied comprising a master station at Lessay (France), with secondary stations at Soustons (also in France), at Sylt (dual rated; off the North Sea coast of Germany, near the Danish border) and at a fourth station located in north-west Britain on the Hebridean island of Barra. The study indicated that such a hypothetical chain would significantly improve Loran-C cover over much of western Europe.

scholarly journals XXIV.—The History of Malmesbury as a Village Community

Archaeologia ◽  
1887 ◽  
Vol 50 (2) ◽  
pp. 421-438
Author(s):  
G.L. Gomme
Keyword(s):  
Eastern Europe ◽  
Social Group ◽  
Western Europe ◽  
North West ◽  
Village Community ◽  
The North ◽  
History Of ◽  
First Time

In the north-west of Wilts is a district which contains some remarkable reminiscences of the two dominant races who have influenced the history of this country. In tracing out the history of this district, as it has come down to us by the traditions and records of early chronicle writers, we arrive at an important epoch when for the first time is brought into strongly marked prominence the outline of the community which had settled there. This community, known to us later under the local name of Malmesbury, is one of the most perfect types of the primitive village which has survived in England, and to the elucidation of its chief characteristics it is proposed to devote some little attention. Keeping before us the outline made known from early records we shall see how this is gradually filled in from facts, which though gleaned from later and modern records, are nevertheless stamped as belonging to the earliest stages of history. And when this local mosaic is completely pieced in we shall be able, I think, to satisfy ourselves that what has so persistently clung to locality in later days originally belonged to a social group, types of which are still to be found in Eastern Europe and India, where society is in a state of arrested progress and has not advanced along the lines which mark its development in Western Europe.

scholarly journals The Republic of North Macedonia - A 'new' country in the Western Balkans

2019 ◽  
Vol 11 (3) ◽  
pp. 87-107
Author(s):  
Mira Šorović
Keyword(s):  
The European Union ◽  
Western Balkans ◽  
Regional Politics ◽  
European Continent ◽  
The Balkans ◽  
Political Processes ◽  
The North ◽  
Short Period ◽  
The Republic ◽  
Real Picture

Abstract The article tries to explain and define political processes and changes trhough history of the 'new' Western Balkans country - the Republic of North Macedonia. It is word about analysis of the political dispute between Former Yugoslav Republic of Macedonia (FYROM) and Greece, from its biginnings until the present day. This paper will try to give the real picture of political area in the Balkans and explore deeper roots of the 'Macedonian Question' controversy. Also, it will give the explinations of the resolution of 27-year dispute, (between the two neighbor countries), by signing the Prespa Agreement. Hence, leaving by side national identity and history, the North Macedonia will be able to join the European Union and NATO. Thus, in short period of time, a 'new' country in the Western Balkans has putted in the center of the regional politics, with clear purpose: promoting ethnic and cultural heritance in the edge of the European continent.

scholarly journals Generasjoner imellom: Holdninger til familiens ansvar øst og vest i Europa

2019 ◽  
Vol 33 (0) ◽  
pp. 34
Author(s):  
Katharina Herlofson ◽  
Svein Olav Daatland ◽  
Marijke Veenstra
Keyword(s):  
Western Europe ◽  
Family Responsibility ◽  
The West ◽  
Older Parents ◽  
North West ◽  
The North ◽  
And Gender ◽  
Almost All ◽  
Eastern And Western Europe ◽  
East West

The article addresses the strength and character of family responsibility norms in Eastern and Western Europe. The strength is measured by the level of support for filial and parental responsibilities (i.e., adult children’s obligations towards older parents and vice-versa) and the character is indicated by the priority given to the older or the younger generation. For the analyses, we employ data from thirteen Eastern and Western European countries participating in the Generations and Gender Survey. In general, family norms are stronger in the East than in the West, but it is difficult to establish where to draw a dividing line. The contrast between the two extremes, Norway and Sweden in the north-west and Georgia in the south-east, is striking. The remaining countries line up quite close along the geographical diagonal (from Scandinavia to Georgia). The character of the norms is less clearly distributed – whereas almost all countries in Eastern Europe give priority to the older generation, the picture in the West is more mixed. The results partly confirm earlier conclusions about east-west differences in family responsibility norms, but adding more countries to the analyses has revealed a more complex and ambiguous picture than presented in previous studies.

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