Water chemistry and heat budget of the Churchill River estuary region

A conceptual scheme for the transition from winter to spring is developed for a small Arctic estuary (Churchill River, Hudson Bay) using hydrological, meteorological and oceanographic data together with models of the landfast ice. Observations within the Churchill River estuary and away from the direct influence of the river plume (Button Bay), between March and May 2005, show that both sea ice (production and melt) and river water influence the region's freshwater budget. In Button Bay, ice production in the flaw lead or polynya of NW Hudson Bay result in salinization through winter until the end of March, followed by a gradual freshening of the water column through April-May. In the Churchill Estuary, conditions varied abruptly throughout winter-spring depending on the physical interaction among river discharge, the seasonal landfast ice, and the rubble zone along the seaward margin of the landfast ice. Until late May, the rubble zone partially impounded river discharge, influencing the surface salinity, stratification, flushing time, and distribution and abundance of nutrients in the estuary. The river discharge, in turn, advanced and enhanced sea ice ablation in the estuary by delivering sensible heat. Weak stratification, the supply of riverine nitrogen and silicate, and a relatively long flushing time (~6 days) in the period preceding melt may have briefly favoured phytoplankton production in the estuary when conditions were still poor in the surrounding coastal environment. However, in late May, the peak flow and breakdown of the ice-rubble zone around the estuary brought abrupt changes, including increased stratification and turbidity, reduced marine and freshwater nutrient supply, a shorter flushing time, and the release of the freshwater pool into the interior ocean. These conditions suppressed phytoplankton productivity while enhancing the inventory of particulate organic matter delivered by the river. The physical and biological changes observed in this study highlight the variability and instability of small frozen estuaries during winter-spring transition, which implies sensitivity to climate change.

Morphometry of Cyphocharax gouldingi in the Praquiquara river watershed, Apeu east, Eastern Amazon

Curimatídeos do gênero Cyphocharax Fowler, 1906 distribuem-se amplamente nas bacias hidrográficas da América do Sul, contudo essa ampla distribuição inequivale a quantidade de trabalhos relacionados ao gênero. Visto isso, objetivou-se contribuir ao conhecimento de Cyphocarax gouldingi (Vari, 1992) através da caracterização morfométrica de indivíduos coletados na microbacia do rio Praquiquara, localizado no médio Apeú, Amazônia Oriental. Para a determinação morfométrica da espécie, utilizou-se o software Adobe Photoshop CS6 Extended, mensurando os respectivos caracteres merísticos: comprimentos total, padrão, zoológico, cabeça e focinho, a medida da altura e o diâmetro do olho de 178 exemplares capturados entre os meses setembro (2014) e maio (2015). Verificou-se uma correlação forte positiva e alometria negativa, entre o comprimento total e as demais medidas externas, e observou a importância do rio Praquiquara durante o ciclo de vida da espécie. Conclui-se que as medidas morfométricas de C. gouldingi (1) satisfazem a estimação de comprimento total e (2) possibilitam o estudo sobre a dinâmica de crescimento da espécie estudada.

Amino acid epimerization dating of coastal neotectonic processes in southeastern Iberian Peninsula: the region between Aguas and Antas river mouths

The coastal area between the mouths of the Aguas and Antas Rivers presents a deformed system of raised marine deposits, some of which have been strongly affected by active tectonics. The use of amino acid epimerization dating of Glycymeris shells from raised coastal deposits allowed determining the age of these marine deposits, all of them linked to highstand sea levels in the Mediterranean realm, with ages between MIS 11 and MIS 1. These results allowed corroborating the age of some previously studied sites, and using new sampling sites, the general aminostratigraphy for the Quaternary raised marine deposits on the Mediterranean coast was confirmed. The main deformation event took place after MIS 11 and continued until MIS 5, and was linked to the activity of the Palomares Faul

Pearl River Estuary Region : North, Guangdong Sheng, China, 1749 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Carte de l'entrée de la riviere de Canton : dressée sur les observations les plus récentes, par N.B., Ingr. ordre. de la Marine ; J.V. Schley direx. It was published by Pierre de Hondt in 1749. Scale [ca. 1:475,000]. Covers the Zhujiang Kou region, Guangdong Sheng, China. Map in French and Dutch.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Asia North Lambert Conformal Conic coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, selected buildings and fortification, shoreline features, and more. Relief shown pictorially.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Pearl River Estuary Region : South, Guangdong Sheng, China, 1749 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Carte des isles qui sont a l'embouchure de la riviere de Canton : dressée sur les observations des navigateurs, par N.B., Ingr. ordre. de la Marine ; J.V. Schley, direx. It was published by Pierre de Hondt in 1749. Scale [ca. 1:500,000]. Covers the Zhujiang Kou region, Guangdong Sheng, China. Map in French and Dutch. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Asia North Lambert Conformal Conic coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, selected buildings and fortification, shoreline features, and more. Relief shown pictorially.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Nile River Delta Region, Egypt, 1821-1823 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Carte ancienne et comparée de la Basse Égypte, rédigé par M. le Colonel Jacotin et par M. Jomard, Membre de l'Institut ; d'après la Grande Carte Topographique levée pendant l'expédition de l'Armée Française par les ingénieurs géographes, les ingénieurs militaires et les ingénieurs des ponts et chaussées ; Blondeau Sct. It was published by Impr. Royale between 1821 and 1823. Scale 1:500,000. Covers the Nile River Delta Region, Egypt. Map in French.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Egypt Red Belt projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, canals, cities and other human settlements, shoreline features, and more. Relief shown by shading and hachures. Harvard Map Collection copies contain manuscript historical annotations and corrections.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Nile River & Red Sea Region, 1884 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: A map of the Nile, from the equatorial lakes to the Mediterranean : embracing the eastern Sûdan (Kordofan, Darfur &c.) and Abyssinia. It was published by E. Stanford in 1884. Scale [ca. 1:6,000,000). Covers the Nile River and Red Sea regions. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Africa Sinusoidal projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, shoreline features, roads, railroads, exploration routes, and more. Relief shown by hachures. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Nile River & Red Sea Region, 1822 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Carte générale de l'Egypte et de l'Arabie Pétrée, par A. H. Brué, Géographe de S.A.R. Monsieur. It was published by Chez l'auteur, Rue des Maçons Sorbonne, No. 9 in Mai 1822. Scale [ca. 1:2,350,000]. Covers the Nile River and Red Sea regions. Map in French.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Egypt Red Belt projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, shoreline features, historic sites and ruins, and more. Relief shown by hachures.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Nile River & Red Sea Region, 1828 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Carte historique, physique & politique de l'Egypte, dressée par le Ch.er Lapie, 1er Géographe du Roi, Officier supérieur au Corps Royal des Ingénieurs Géographes, d'après les itinéraires & les reconnaissances recueillis par MM. les Généraux Comtes Guilleminot, Tromelin & Fernig, ainsi que d'après ceux de MM. Pacho, Caillaud, Coste, Burckhardt, Irwin &c. et les travaux de la Commission d'Egypte, le tout appuyé sur les Observations Astronomiques de MM. Gauttier, Smith, Rüppel & Nouet ; gravé par Flahaut, Rue de l'Est, N°1 ; écrit par Hacq, Graveur du Dèpôt de la Guerre. It was published by Chez Ch. Picquet in 1828. Scale [ca 1:120,000]. Covers the Nile River and Red Sea regions. Map in French. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Egypt Red Belt projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, shoreline features, roads, historic sites and ruins, and more. Relief shown by hachures. Includes insets: "Plan d'Alexandrie" (1:50,000) and "Plan du Caire" (1:50,000).This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Nile River & Red Sea Region, ca. 1870 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Egypt, Arabia Petraea, and lower Nubia, by Keith Johnston. It was published by William Blackwood & Sons ; W. & K. Johnston, ca. 1870. Scale [ca. 1:2,854,868]. Covers the Nile River and Red Sea regions.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Egypt Red Belt projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, shoreline features, roads, railroads, canals, wells, and more. Covers the Nile River and Red Sea regions.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Nile River Delta Region, Egypt, 1855 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Carte hydrographique de la Basse Égypte et d'une partie de l'Isthme de Suez où sont indiqués les travaux exécutés ou à exécuter, d'après les ordres de Son Altesse Mehémet-Ali, Vice-Roi d'Egypte. Avec le projet de communication directe des deux mers au travers de l'Isthme, par M. Linant de Bellefonds ; gravée par Schwaerzlé. It was published by Dépot Général de la Guerre de France in 1855. Scale 1:250,000. Covers the Nile River Delta region, Egypt. Map in French. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Egypt Red Belt projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, canals, roads, railroads, cities and other human settlements, fortification, administrative boundaries, shoreline features, ruins and historical sites, and more. Relief shown by hachures. Includes also text, Profile de l'Isthme de Suèz, and notes.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Nile River & Red Sea Region, 1810 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Charte vom Nil Strome, oder Aegypten, Nubien und Habesch. It was published in 1810. Scale [ca. 1:7,000,000]. Covers the Nile River and Red Sea region. Map in German. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Africa Lambert Conformal Conic projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial and administrative boundaries, shoreline features, caravan routes, and more. Relief shown by hachures. Includes notes.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Nile River Delta & Suez Canal Region, Egypt, 1880 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Carte de la basse Egypte et du canal maritime de Suez, dressée par Desbuissons ; gravé sur pier. et chrom. par P. Méa. It was published by E. Andriveau-Goujon in 1880. Scale 1:500,000. Covers the Nile River Delta and Suez Canal region, Egypt. Map in French.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Africa Lambert Conformal Conic projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, shoreline features, canals, railroads, selected buildings, cultivated and uncultivated lands, and more. Relief shown by hachures. Includes also insets: Plan d'Ismaïlia (1:25,000) -- Plan de la rade de Port Saïd et de l'embouchure du Canal dans la Méditerranée (1:60,000) -- Plan de la rade de Suez et de l'embouchure du Canal dans la Mer Rouge (1:60,000).This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

The great river. Notes on the Amazon and its tributaries and the steamer services ...

Mode of access: Internet.