scholarly journals A Review on Historical Tsunamis in the Canary Islands: Implications for Tsunami Risk Reduction

Geosciences ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 222
Author(s):  
Inés Galindo ◽  
Carmen Romero ◽  
Esther Martín-González ◽  
Juana Vegas ◽  
Nieves Sánchez
Keyword(s):  
Canary Islands ◽  
Preventive Measures ◽  
High Population Density ◽  
Documentary Sources ◽  
Geological Processes ◽  
Tsunami Risk ◽  
The One ◽  
The Impact ◽  
First Time ◽  
La Gomera

The analysis of the historical documentary sources together with evidence from the geological record is essential to understand the impact and processes triggered by tsunamis on the Canary Islands. This archipelago has been affected by tsunamis caused by different geological processes, of which the most studied have been those generated by prehistoric mega-landslides. However, there is also evidence of those produced by distant tsunamigenic sources. An exhaustive review of all documentation available was made, identifying the existence of at least four seismically triggered tsunami episodes (1755, 1761, 1941 and 1969), the majority with an epicenter in the Azores-Gibraltar boundary. In this work, several tsunamis are cited for the first time, such as the one produced by the Argaga (La Gomera) landslide in 2020. Other episodes historically identified as tsunamis are discarded as they corresponded to other geological events. The effects of most historic tsunamis have gone unnoticed, having occurred in epochs of sparsely populated coastal areas. But their study allows us to infer the need for the archipelago authorities to establish preventive measures to avoid possible damage from tsunamis, especially if we consider the presently high population density of the Canarian littoral.

scholarly journals The demography of the Canary Islands from a genetic perspective

2020 ◽  
Author(s):  
Rosa Fregel ◽  
Alejandra C Ordóñez ◽  
Javier G Serrano
Keyword(s):  
Canary Islands ◽  
Demographic History ◽  
American Continent ◽  
North African ◽  
European Colonization ◽  
History Of ◽  
The Impact ◽  
First Time ◽  
Canarian Archipelago ◽  
North African Origin

Abstract The establishment of European colonies across the world had important demographic consequences because it brought together diverse and distant civilizations for the first time. One clear example of this phenomenon is observed in the Canary Islands. The modern Canarian population is mainly the result of the admixture of natives of North African origin and European colonizers. However, additional migratory flows reached the islands due to the importation of enslaved Africans to cultivate sugarcane and the intense commercial contact with the American continent. In this review, we evaluate how the genetic analysis of indigenous, historical, and current populations has provided a glimpse into the Canary Islands’ complex genetic composition. We show that each island subpopulation’s characterization is needed to fully disentangle the demographic history of the Canarian archipelago. Finally, we discuss what research avenues remain to be explored to improve our knowledge of the impact that the European colonization had on its native population.

The impact of snow products on detecting trends in sea ice thickness during the CryoSat-2 era

2020 ◽  
Author(s):  
Heidi Sallila ◽  
Samantha Buzzard ◽  
Eero Rinne ◽  
Michel Tsamados
Keyword(s):  
Sea Ice ◽  
Snow Depth ◽  
Ice Age ◽  
Ice Thickness ◽  
Sea Ice Thickness ◽  
Seasonal Snow ◽  
Uncertainty Estimates ◽  
The One ◽  
The Impact ◽  
First Time

<p>Retrieval of sea ice depth from satellite altimetry relies on knowledge of snow depth in the conversion of freeboard measurements to sea ice thickness. This remains the largest source of uncertainty in calculating sea ice thickness. In order to go beyond the use of a seasonal snow climatology, namely the one by Warren created from measurements collected during the drifting stations in 1937 and 1954–1991, we have developed as part of an ESA Arctic+ project several novel snow on sea ice pan-Arctic products, with the ultimate goal to resolve for the first time inter-annual and seasonal snow variability.</p><p><span>Our products are inter-compared and calibrated with each other to guarantee multi-decadal continuity, and also compared with other recently developed snow on sea ice modelling </span><span>and satellite based </span><span>products. Quality assessment and uncertainty estimates are provided at a gridded level and as a function of sea ice cover characteristics such as sea ice age, and sea ice type.</span></p><p>We investigate the impact of the spatially and temporally varying snow products on current satellite estimates of sea ice thickness and provide an update on the sea ice thickness uncertainties. We pay particular attention to potential biases of the seasonal ice growth and inter-annual trends.</p>

The Impact of Differentiation and Differential on Hong Kong's Career Public Service

2003 ◽  
Vol 69 (2) ◽  
pp. 219-233
Author(s):  
Brian Brewer
Keyword(s):  
Hong Kong ◽  
Public Administration ◽  
Public Service ◽  
Civil Service ◽  
The Public ◽  
Documentary Sources ◽  
One Country Two Systems ◽  
The One ◽  
Career Employment ◽  
The Impact

The public administration principles characteristic of many Commonwealth countries served as the foundations for building the Hong Kong civil service. These have continued to operate in line with the `one country two systems' concept under which Hong Kong has been administered, since 1997, as a Special Administrative Region (SAR) of China. Career employment, hierarchy and public service values combined to provide an overarching unity to a system that nevertheless has developed considerable differentiation over time. This article examines the developments that are currently modifying Hong Kong's public sector. The discussion draws on documentary sources and a recently completed qualitative study on the experiences and perspectives of senior Hong Kong managers working in a dozen government departments and agencies. The discussion addresses questions about whether greater differentiation across government departments, in combination with increasing differential within these organizations, will ultimately bring about the demise of the traditional civil service system.

scholarly journals Peculiarities of selecting woody plants for anatomy analysis in various environments

2021 ◽  
Vol 946 (1) ◽  
pp. 012048
Author(s):  
I I Vlasova ◽  
A V Kopanina
Keyword(s):  
Woody Plants ◽  
Woody Plant ◽  
Sampling Area ◽  
Geological Processes ◽  
Plant Samples ◽  
Bark Tissue ◽  
Wood Analysis ◽  
The Impact ◽  
First Time ◽  
Selection Of

Abstract Methods for studying woody plants anatomy are now very diverse. We modified the guidelines for bark studies developed for wood analysis at all stages of preparing the woody plant samples for microscope study. For the first time, we used separation to separate hard and soft fractions of the bark tissue. Correct approach to selection of plant samples and further laboratory manipulations ensures validity of the results of our study. We select the size of the sampling area depending on the type of vegetation. In every habitat, we also include transects along the gradient of height above sea level or the impact from the source of natural stress. The results of our research will help study landscape changes during exogenous geological processes and phenomena using biological indication of geosystems.

Conclusion: The 1960s and Beyond

2015 ◽  
pp. 346-356
Author(s):  
David H. Weinberg
Keyword(s):  
Western Europe ◽  
Summer Camps ◽  
Educational Institutions ◽  
Sports Clubs ◽  
The Holocaust ◽  
New Institutions ◽  
The 1960S ◽  
The One ◽  
The Impact ◽  
First Time

This concluding chapter addresses the impact of the Holocaust on established forms of collective Jewish identity and commitment in France, Belgium, and the Netherlands. The profound rupture in both Jewish and general life during the war and the physical dislocation that followed meant that thousands of survivors in western Europe had to rediscover or discover for the first time their place among other Jews and among their fellow citizens. In attempting to find a new rationale for Jewish survival, leading Jewish figures of all stripes recognized that there could be no simple return to what they believed were the pre-war polarities of religious orthodoxy on the one hand and assimilationism on the other. With the aid of money from reparation payments and the guidance of organizations like the American Jewish Joint Distribution Committee (JDC), French, Belgian, and Dutch Jewish leaders created new institutions, such as Jewish community centres, summer camps, and sports clubs, to appeal to a mobile and unsettled population. While not all of these efforts were immediately successful, what slowly emerged were new forms of Jewish consciousness that enabled young men and women to express their commitment to a shared fate outside the traditional framework of formal religious and educational institutions.

scholarly journals Miradas exploratorias. Fotografías inéditas del viaje a Italia de Asís Cabrero

2017 ◽  
Vol 4 (1) ◽  
pp. 31
Author(s):  
María José Aldea Hernández ◽  
Iñaki Bergera
Keyword(s):  
Primary Source ◽  
Modern Language ◽  
The Gaze ◽  
Visual Tool ◽  
Historical Architecture ◽  
The One ◽  
The Impact ◽  
First Time ◽  
The Way

<p><em>As was the case in not just a few of his contemporaries, Francisco Cabrero's modern advent is centred on his initial trip, in this case the one made to Italy in 1941. The historiography of Spanish architecture in general and the specific studies on the architect have shown the impact and the scope of this two-month trip on his later career. Fleeing the ruling academicism in Spain, Cabrero 'discovers' in Italy the rationalist and abstract expression of monumentality. Nevertheless, the access to a wide photographic reportage —unpublished up to now— accomplished by the architect during the trip, allows us to document his journey but also to put in to question those claims. The photographs introduce us for the first time to Cabrero the photographer —to his particular way of constructing an image— and as a result they pave the way for the recognition of this visual tool as an exploratory instrument of the gaze to the detriment of the pencil and notebook. Above all and paradoxically, they contradict the supposed fascination for modern language in Cabrero since discovering that historical architecture was almost the only objective of his selective photographic look and as a result, the primary source, of his transforming inspiration.</em></p>

Hemicycla (Adiverticula) diegoi (Gastropoda: Pulmonata: Helicidae), a new species from Tenerife, Canary Islands, with a phylogenetic analysis of conchologically similar species in the genus Hemicycla Swainson, 1840

Zootaxa ◽  
2011 ◽  
Vol 2757 (1) ◽  
pp. 29 ◽  
Author(s):  
MARCO T. NEIBER ◽  
RICARDO VEGA-LUZ ◽  
RODOLFO VEGA-LUZ ◽  
STEFAN KOENEMANN
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Canary Islands ◽  
Function Analysis ◽  
Genetic Distances ◽  
Similar Species ◽  
Gran Canaria ◽  
Eobania Vermiculata ◽  
First Time ◽  
La Gomera

Hemicycla (Adiverticula) diegoi n. sp. from the westernmost part of the Teno massif above the Lighthouse at Punta de Teno, Tenerife, Canary Islands is described and compared to conchologically and anatomically similar species in the genus Hemicycla Swainson, 1840. The validity of the new species is corroborated by a phylogenetic analysis including several congeneric species, interand intraspecific genetic distances and a morphometric comparison by means of a discriminant function analysis. Hemicycla cf. paivanopsis (Mabille, 1882) and Hemicycla quadricincta quadricincta (Morelet, 1864) from La Gomera and Hemicycla berkeleii (R. T. Lowe, 1861) from Gran Canaria are tentatively placed in Hemicycla s. str. on the basis of a phylogenetic analysis. Furthermore, Eobania vermiculata (O. F. Müller, 1774) is reported as an introduced species in Gran Canaria for the first time.

scholarly journals Density dependence of developmental instability in a dimorphic ungulate

2008 ◽  
Vol 4 (5) ◽  
pp. 512-514 ◽  
Author(s):  
Emmanuel Serrano ◽  
Jean-Marc Angibault ◽  
Bruno Cargnelutti ◽  
A. J. Mark Hewison
Keyword(s):  
Population Density ◽  
Environmental Stress ◽  
Density Dependence ◽  
Fallow Deer ◽  
Individual Quality ◽  
High Population Density ◽  
Dama Dama ◽  
The Impact ◽  
Number Of Individuals ◽  
First Time

The use of fluctuating asymmetry (FA) for biomonitoring environmental stress is limited by the lack of work on how FA in particular traits responds to specific stresses. Here, by manipulating the number of individuals in an enclosed fallow deer ( Dama dama ) population, we describe, for the first time, clear density dependence in the FA of juvenile jaw morphology. The impact of high population density on FA was strong for both sexes, supporting the use of FA for indexing environmental stress. In addition, there was some indication that the change in FA was greater in males (43.6%) than females (28.5%). Finally, the ability to buffer density-dependent stress was independent of body condition. We suggest that, under highly limiting conditions, whole cohorts may be unable to buffer against developmental error, irrespective of individual quality.

Aportación a la flora liquénica de las Islas Canarias. iv. Líquenes epifitos de La Gomera (Islas Canarias)

1998 ◽  
Vol 14 (1) ◽  
pp. 85-107 ◽  
Author(s):  
J. Etayo
Keyword(s):  
North America ◽  
Canary Islands ◽  
National Park ◽  
New Records ◽  
Epiphytic Lichens ◽  
Pseudevernia Furfuracea ◽  
First Time ◽  
La Gomera

A catalogue of epiphytic lichens from La Gomera (Canary Islands) is presented, especially from Garajonay National Park. 207 species are treated, many of which are new records from the island. Gyalideopsis muscicola var. gomerae is proposed as new. Gyalideopsis calabrica and Porina isidiata are proposed as synonyms of G. muscicola and Porina guaranitica, respectively. Helocarpon corticolum is reported for the first time from North America. New for Macaronesia are Arthonia vinosa, Arthopyrenia cinereopruinosa, Bacidina egenula, B. phacodes, Gyalecta truncigena, Lauderlindsaya acroglypta, Lecidea botryosa, L. erythrophaea, Lecidella achristotera, Lichinodium ahlneri, Ochrolechia arborea, Opegrapha vermicellifera, Pertusaria amara var. slesvicensis, Pseudevernia furfuracea var. ceratea, Pseudosagedia obsoleta, Strigula smaragdula and S. taylorii. New for the Canary Islands are Arthonia anglica, Arthothelium norvegicum, Blarneya hibernica, Calicium lenticulare, Catinaria montana, Haematomma sorediatum, Hypotrachyna taylorensis, Lecanora argentata, L. strobilina, Melaspilea diplasiospora, Micarea melaena, Ochrolechia androgyna, Pertusaria ophthalmiza, Psoroglaena stigonemoides, Pyrenula dermatodes, Scoliciosporum pruinosum and Trapeliopsis granulosa.

scholarly journals First citation of Macrocoma splendens for La Gomera, Canary Islands (Coleoptera Chrysomelidae Eumolpinae)

2020 ◽  
Vol 152 (3) ◽  
pp. 105-106
Author(s):  
Stefano Zoia
Keyword(s):  
Canary Islands ◽  
La Palma ◽  
First Time ◽  
La Gomera

Macrocoma splendens Lindberg, 1950, is reported for the first time for La Gomera (Canary Islands) and examined specimens are compared with specimens collected at La Palma and tenerife. this is the first citation of a Macrocoma species for La Gomera.

Sign in / Sign up

Export Citation Format

Share Document