1000 resultados para Saavedra, Cornelio de, 1759-1829.


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Thesis (doctoral)--Universitat Leipzig.

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Thesis (doctoral)--

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Vol. 4 edited by Cantor with the assistance of others.

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From Jan. 1826-July 1830 title reads: American journal of education. In August 1830 the title was changed to American Annuals of Education and instruction. The numbers for August-Dec. 1830, however, were issued both under this later title (as 3d ser., b.1, no 1-4) and under the title American journal and annals of education and instruction, new ser., v.1 of the 3d ser. They are preceded by 24 pages ("Editor's address" and "Sketches of Hofwyl") reprinted from the numbers for Aug.-Dec. 1830) In 1838 the title was shortened to American annuals of education. Editors: 1826-29, Williams Russell.--1830-37, W.C. Woodbridge.--1837--38 W.A. Alcott.

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Includes index.

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Approaches to quantify the organic carbon accumulation on a global scale generally do not consider the small-scale variability of sedimentary and oceanographic boundary conditions along continental margins. In this study, we present a new approach to regionalize the total organic carbon (TOC) content in surface sediments (<5 cm sediment depth). It is based on a compilation of more than 5500 single measurements from various sources. Global TOC distribution was determined by the application of a combined qualitative and quantitative-geostatistical method. Overall, 33 benthic TOC-based provinces were defined and used to process the global distribution pattern of the TOC content in surface sediments in a 1°x1° grid resolution. Regional dependencies of data points within each single province are expressed by modeled semi-variograms. Measured and estimated TOC values show good correlation, emphasizing the reasonable applicability of the method. The accumulation of organic carbon in marine surface sediments is a key parameter in the control of mineralization processes and the material exchange between the sediment and the ocean water. Our approach will help to improve global budgets of nutrient and carbon cycles.

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Vorbesitzer: Freiherrlich Carl von Rothschild'sche Bibliothek Frankfurt am Main; alte Signatur: Hs. in Quart 107

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Vorbesitzer: Freiherrlich Carl von Rothschild'sche Bibliothek Frankfurt am Main; alte Signatur: Hs. in Quart 106