The hydrodynamic foundation for salmon lice dispersion modeling along the Norwegian coast     

Asplin  Lars  Albretsen  Jon  Johnsen  Ingrid Askeland  Sandvik  Anne Dagrun 《Ocean Dynamics》2020,70(8):1151-1167

Ocean Dynamics - Norway has complicated dynamics in the coastal ocean and in the fjords. In this area is also the largest salmon aquaculture industry in the world. The salmon industry is valuable...  相似文献   

Acceptable sustainability in the fishing fleet     

Ingrid Bouwer Utne 《Marine Policy》2008

This article discusses the performance of the Norwegian fishing fleet within an acceptable level of sustainability. Previously, the cod-fishing fleet has been evaluated at the attributes—accident risk, employment, profitability, quality of the fish meat, catch capacity, greenhouse gas emissions/acidification, and bycatch/selection. The assessments focused on the first four steps of the systems engineering process, i.e., from needs identification to trade-offs of system alternatives. The objective of this paper is to focus on the last steps of the process; design, solve, verify, and test, to improve the decision-basis for fisheries management in order to increase sustainability in the fishing fleet. More specifically, this means to analyze the decision-making situation and develop acceptance criteria of a sustainable Norwegian cod-fishing fleet to enable fisheries management to monitor the sustainability performance of the fleet on a regular basis.  相似文献   

Temporal variability of three different macrofauna communities in the northern North Sea     

Ulrike Schückel  Siegfried Ehrich  Ingrid Kröncke 《Estuarine, Coastal and Shelf Science》2010

In 1999, 2003 and 2007 macrofauna communities were sampled in three different areas (“Boxes”) of 10 × 10 nautical miles in the northern North Sea in order to study the temporal changes in community structure in relation to changes in temperature or changes in hydrography.  相似文献   

Mapping the archaeological soil archive of sand and gravel mineral reserves in Britain     

Ingrid Ward  Barry Smith  Russell Lawley 《Geoarchaeology》2009,24(1):1-21

Primary sand and gravel deposits in Britain play an important role in preserving our cultural heritage and are also a valuable aggregate resource. While an understanding of the extrinsic properties of the soil archive (such as pH, redox, groundwater) can provide a firstorder assessment of the potential risk to any archaeologically sensitive deposits, we have very poor definition of spatial variations in the extrinsic properties of soil that influence archaeological preservation at a regional and national scale. Developments in digital geological mapping, remote sensing, and geochemical survey data undertaken by the British Geological Survey (BGS) have, however, significantly extended capabilities in this respect and can potentially be used to provide a primary assessment of the sensitivity of the present soil archive and the potential risk from changes to the soil process on cultural material in areas earmarked for aggregate extraction. Two of the major factors affecting archaeological preservation—soil acidification and groundwater—can be mapped or predicted at scales of better than 1:50,000 across increasingly large parts of the country using a combination of regional hydrogeological, geophysical, and geochemical data. Additional data from site investigations may further refine preservation potential as a function of changes in redox potential and acidity. These data, maps and models can be used to (1) better establish a baseline for archaeological preservation at a regional and national scale and (2) improve our understanding of how the physical and chemical properties of the near surface environment can be managed to sustainably preserve archaeological materials in areas impacted by sand and gravel extraction. © 2009 Wiley Periodicals, Inc.  相似文献   

Paleoenvironmental dynamics in central-eastern Brazil during the last 23 000 years: tropical peatland record in the Cerrado biome     

Camila Rodrigues Costa  Cynthia Fernandes Pinto da Luz  Ingrid Horák-Terra  Plínio Barbosa de Camargo  Uidemar Morais Barral  Carlos Victor Mendonça-Filho  Thamyres Sabrina Gonçalves  Alexandre Christófaro Silva 《第四纪科学杂志》2023,38(1):61-75

The Cerrado biome is the second largest in Brazil, but the evolution of the Cerrado during the late Quaternary is not yet fully known. This study identifies paleoenvironmental changes during the last 23 000 years, based on a tropical mountain peatland record, in the Serra do Espinhaço Meridional in central-eastern Brazil. A multi-proxy approach was used that involved palynological analysis, stable isotopes (δ¹³C, δ¹⁵N), geochemistry, radiocarbon dating and multivariate statistics derived from a peatland core from Rio Preto (Minas Gerais state). The study reveals a very humid and cold climate during the late Pleistocene, with an increase in temperature and decrease in humidity at the Pleistocene–Holocene transition. During this period there was strong instability in the landscape (episodes of erosion). At the beginning of the Holocene there was a reduction in humidity with greater landscape stability. The current sub-humid climatic conditions seem to have been established in the mid-/late Holocene, with periods of landscape instability. Our findings agree with other Cerrado records that contradict previously established hypotheses, such as the Amazonian Refuge and the Pleistocene Arc.  相似文献