搜索结果: 61-75 共查到“知识库 海洋化学”相关记录247条 . 查询时间(0.468 秒)
Stratification and horizontal exchange in Lake Victoria, East Africa
Lake Victoria East Africa
2014/11/28
We characterize stratification patterns over diel, seasonal, and annual time scales in inshore and offshore
regions of Lake Victoria, East Africa; determine conditions leading to horizontal exchanges...
The asymmetry of the underwater horizontal light field and its implications for mirror-based camouflage in silvery pelagic fish
horizontal light field silvery pelagic fish
2014/11/28
Many pelagic species, particularly teleost fish, have silvered lateral surfaces that are thought to primarily serve
as a form of camouflage. The underlying argument is that the underwater light field...
A regime shift in Lake Superior ice cover, evaporation, and water temperature following the warm El Nin˜ o winter of 1997–1998
ice cover evaporation water temperature
2014/11/28
Significant trends in Lake Superior water temperature and ice cover have been observed in recent decades, and
these trends have typically been analyzed using standard linear regression techniques. Al...
Locating Noctiluca miliaris in the Arabian Sea: An optical proxy approach
Arabian Sea Locating Noctiluca
2014/11/28
Coincident with shifting monsoon weather patterns over India, the phytoplankter Noctiluca miliaris has
recently been observed to be dominating phytoplankton blooms in the northeastern Arabian Sea dur...
Regional-scale variation of dissolved organic carbon concentrations in Swedish lakes
Organic carbon lakes
2014/10/16
We assessed spatial variability in dissolved organic carbon (DOC) concentrations measured in nearly 2000
Swedish lakes. Inter-lake variance peaked at two different scales, representing within-region ...
Identifying variable sea ice carbon contributions to the Arctic ecosystem: A case study using highly branched isoprenoid lipid biomarkers in Cumberland Sound ringed seals
Sea ice carbon The arctic ecosystem
2014/10/16
We analyzed liver samples from 322 ringed seals (Pusa hispida) collected from Cumberland Sound (southeast
Baffin Island) to test our ability to differentiate between carbon sources in near apex preda...
Photosynthetic protein stoichiometry and photophysiology in the high latitude North Atlantic
Photosynthetic protein stoichiometry photophysiology the high latitude North Atlantic
2014/10/16
Iron availability influences phytoplankton physiology and growth over more than one-third of the surface oceans, with recent evidence even indicating iron stress during and following the latter stages...
Nitrate uptake by foraminifera and use in conjunction with endobionts under anoxic conditions
Nitrate uptake foraminifera endobionts anoxic conditions
2014/10/16
Among eukaryotes, some benthic foraminiferal species have been reported to be capable of nitrate respiration, although little is known about their denitrification processes. In this study, we incubate...
Oceans may be acidifying faster today than in the past 300 million years
Oceans 300 million years
2014/9/12
With increasing levels of carbon dioxide accumulating in the atmosphere and moving into marine ecosystems, the world's oceans are becoming more acidic.
Salt marsh tidal exchange increases residence time of silica in estuaries
Salt marsh tidal exchange increases residence time of silica in estuaries
2014/7/10
We present flux measurements of dissolved silicon (DSi), biogenic Si (BSi), and dissolved inorganic nitrogen (DIN) and phosphorus (DIP) on a temperate salt marsh in Narragansett Bay, Rhode Island, ove...
Trace metal cycling in the deep water of the South China Sea: The composition, sources, and fluxes of sinking particles
Trace metal cycling in the deep water the South China Sea composition sources fluxes of sinking particles
2014/4/8
Moored sediment traps were deployed for 1 yr at depths of 120, 600, and 3500 m in the water column to investigate the trace metal (M) (Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) composition, sources, ...
Grazing resistance allows bloom formation and may explain invasion success of Gonyostomum semen
Grazing resistance bloom formation may explain invasion success Gonyostomum semen
2014/4/3
The nuisance alga Gonyostomum semen (Raphidophyceae) has expanded in the Nordic countries during the last decades and can dominate lake phytoplankton communities almost completely. A possible explanat...
Diversity trumps acidification: Lack of evidence for carbon dioxide enhancement of Trichodesmiumcommunity nitrogen or carbon fixation at Station ALOHA
Diversity trumps acidification Lack of evidence carbon dioxide enhancement Trichodesmiumcommunity nitrogen carbon fixation Station ALOHA
2014/4/2
We conducted 11 independent short-term carbon dioxide (CO2) manipulation experiments using colonies of the filamentous cyanobacteria Trichodesmiumisolated on three cruises in the North Pacific Subtrop...
半潜式海上浮式风力机平台设计及水动力响应
半潜式平台 模型试验 响应特性
2014/4/1
为了开发海上风能资源，探索浮式风力机平台响应特性，设计了一种半潜式海上浮式风力机平台样机。利用风压模型模拟风力机气动载荷，基于势流理论和Morison方程计算水动力载荷，并根据阻尼矩阵计算阻尼力和系泊线载荷，建立了海上浮式风力机运动响应数值模型。制作了1/50的试验模型，并在水池进行水动力实验，对垂荡板在设计中的作用进行了验证，测量了模型的固有周期、衰减系数以及规则波条件下的响应等，对比发现数值模...