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排序方式: 共有353条查询结果,搜索用时 109 毫秒
351.
Dag O. Hessen JoLynn Carroll Berit Kjeldstad Anton A. Korosov Lasse H. Pettersson Dmitry Pozdnyakov Kai Sørensen 《Estuarine, Coastal and Shelf Science》2010
Spectral light attenuation profiles and concentrations of total and dissolved carbon (C), nutrients and chlorophyll a (Chla) were studied along transects running from the river mouth to the Kara Sea during late summer 2003 for the Yenisey and fall 2005 for the Ob estuaries. Earth Observation data were used to generate composite images of water color and Chla distribution over the estuaries and the Kara Sea to reveal the spatial impact of the river efflux in terms of optical properties. 相似文献
352.
The cod stocks in the Baltic Sea are important not only for fisheries but for the entire ecosystem utilized by numerous stakeholders around the coast. All such activities have economic values. In this note the economics of the Swedish Baltic Sea cod fishery is estimated in relation to the sector's interaction with other users of the Baltic Sea ecosystem. The results show a negative resource rent for the fishery, € −5 million without public expenses (subsidies and administrative costs), and € −13 million including public expenses. The interactions between the fisheries and tourism, seal population, carbon dioxide emissions, recreational fishing, and discards are discussed, and when monetary estimates are available these are related to the estimated resource rent. 相似文献
353.
G. Beskin V. Debur V. Plokhotnichenko S. Karpov A. Biryukov L. Chmyreva A. Pozanenko K. Hurley 《Astrophysics and Space Science》2007,308(1-4):477-479
The region of SGR 1806-20 localization was observed during its gamma-ray activity in 2001. The observations have been performed
on the 6-meter telescope of the Special Astrophysical Observatory, using the Panoramic Photometer-Polarimeter (PPP). The search
for variability was performed on the 10−6–10 s time scale, and its results were compared to the properties of corresponding X-ray flares.
This work has been supported by the Russian Foundation for Basic Research (grant No 04-02-17555), Russian Academy of Sciences
(program “Evolution of Stars and Galaxies”), and by the Russian Science Support Foundation. The authors would also like to
thank the anonymous referee for his/her valuable comments. 相似文献