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.

Hādhihi al-safīnah al-mubārakah : manuscript, 1821

Title from colophon.

Data compilation of ESOP

The work in this sub-project of ESOP focuses on the advective and convective transforma-tion of water masses in the Greenland Sea and its neighbouring areas. It includes observational work on the sub-mesoscale and analysis of hydrographic data up to the gyre-scale. Observations of active convective plumes were made with a towed chain equipped with up to 80 CTD sensors, giving a horizontal and vertical resolution of the hydrographic fields of a few metres. The observed scales of the penetrative convective plumes compare well with those given by theory. On the mesoscale the structure of homogeneous eddies formed as a result of deep convection was observed and the associated mixing and renewal of the intermediate layers quantified. The relative importance and efficiency of thermal and haline penetrative convection in relation to the surface boundary conditions (heat and salt fluxes and ice cover) and the ambient stratification are studied using the multi year time series of hydro-graphic data in the central Greenland Sea. The modification of the water column of the Greenland Sea gyre through advection from and mixing with water at its rim is assessed on longer time scales. The relative contributions are quantified using modern water mass analysis methods based on inverse techniques. Likewise the convective renewal and the spreading of the Arctic Intermediate Water from its formation area is quantified. The aim is to budget the heat and salt content of the water column, in particular of the low salinity surface layer, and to relate its seasonal and interannual variability to the lateral fluxes and the fluxes at the air-sea-ice interface. This will allow to estimate residence times for the different layers of the Greenland Sea gyre, a quantity important for the description of the Polar Ocean carbon cycle.