JOI/USSAC Newsletter PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download JOI/USSAC Newsletter PDF full book. Access full book title JOI/USSAC Newsletter by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category : Oceanography
Languages : en
Pages : 80
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Oceanography
Languages : en
Pages : 80
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Oceanography
Languages : en
Pages : 102
Get Book Here
Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309182131
Category : Political Science
Languages : en
Pages : 236
Get Book Here
Book Description
In 1995, the National Science Foundation (NSF) created a special account to fund large (several tens of millions of dollars) research facilities. Over the years, these facilities have come to represent an increasingly prominent part of the nation's R&D portfolio. Recently concern has intensified about the way NSF is selecting projects for this account. In 2003, six U.S. Senators including the chair and ranking member of the Senate Subcommittee on VA, HUD, and Independent Agencies Appropriations expressed these concerns in a letter to the NRC asking it to "review the current prioritization process and report to us on how it can be improved." This report presents a series of recommendations on how NSF can improve its priority setting process for large research facilities. While noting that NSF has improved this process, the report states that further strengthening is needed if NSF is to meet future demands for such projects.
Author:
Publisher:
ISBN:
Category : Geological surveys
Languages : en
Pages : 34
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Plankton, Fossil
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Ichnology
Languages : en
Pages : 242
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 610
Get Book Here
Book Description
Author: Gerhard Fischer
Publisher: Springer Science & Business Media
ISBN: 3642586465
Category : Science
Languages : en
Pages : 768
Get Book Here
Book Description
Paleoceanographic proxies provide infonnation for reconstructions of the past, including climate changes, global and regional oceanography, and the cycles of biochemical components in the ocean. These prox ies are measurable descriptors for desired but unobservable environmental variables such as tempera ture, salinity, primary productivity, nutrient content, or surface-water carbon dioxide concentrations. The proxies are employed in a manner analogous to oceanographic methods. The water masses are first characterized according to their specific physical and chemical properties, and then related to particular assemblages of certain organisms or to particular element or isotope distributions. We have a long-standing series of proven proxies available. Marine microfossil assemblages, for instance, are employed to reconstruct surface-water temperatures. The calcareous shells of planktonic and benthic microorgan isms contain a wealth of paleoceanographic information in their isotopic and elemental compositions. Stable oxygen isotope measurements are used to detennine ice volume, and MglCa ratios are related to water temperatures, to cite a few examples. Organic material may also provide valuable infonnation, e. g. , about past productivity conditions. Studying the stable carbon isotope composition of bulk organic matter or individual marine organic components may provide a measure of past surface-water CO 2 conditions within the bounds of certain assumptions. Within the scope of paleoceanographic investigations, the existing proxies are continuously evolving and improving, while new proxies are being studied and developed. The methodology is improved by analysis of samples from the water column and surface sediments, and through laboratory experiments.
Author: Geological Society of London
Publisher: Geological Society of London
ISBN: 9781862390911
Category : Science
Languages : en
Pages : 598
Get Book Here
Book Description
Non-continental margins lack thick lavas that are generated as continental crust thins immediately prior to the onset of seafloor spreading. They may form up to 30 per cent of passive margins around the world. This volume contains papers examining an active margin, fossil margins that border present day oceans, and remnants of margins exposed today in the Alps. The papers present evidence across a range of scales, from individual mineral grains, through borelide cores and outcrop, to whole margins at the crustal scale.
Author:
Publisher:
ISBN:
Category : Oceanography
Languages : en
Pages : 212
Get Book Here
Book Description
