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Region Of Freshwater Influence
Region of Freshwater Influence (ROFI) is a region in coastal sea where stratification is governed by the local input of freshwater discharge from the coastal source, while the role of the seasonal input of buoyancy from atmospheric heating is much smaller. Background ROFI and river plume are similar terms related to water masses formed as a result of mixing of river discharge and sea water. The difference between river plumes and ROFI's consists in their spatial scales and freshwater residence time. River plumes are regarded as water masses formed as a result of transformation of freshwater discharge in coastal sea on diurnal to synoptic time scales, while ROFI’s reproduce transformation of freshwater discharge on seasonal to annual time scales. A river plume embedded into a ROFI reproduce a continuous process of transformation of freshwater discharge. Initially, river discharge enters the shelf sea from a river mouth and forms a sub-mesoscale (with spatial extents ~1-10 km) or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Wales, Bangor
Bangor University () is a public research university in Bangor, Gwynedd, Wales. It was established by Royal Charter in 1885 as the University College of North Wales (UCNW; ), and in 1893 became one of the founding institutions of the federal University of Wales. In 1996, after structural changes to the University of Wales it became known as the University of Wales, Bangor (UWB; ). It became independent of the University of Wales in 2007, adopting its current name and awarding its own degrees. It has over 10,000 students across 3 academic colleges and 11 schools, as well as several large research institutes. Its campus makes up a large part of Bangor, and extends to nearby Menai Bridge as well, with a second campus in Wrexham for some healthcare courses. Its total income for 2022/23 was £178.0 million, of which 19% came from research grants, and it has an endowment of £8.2 million. Its alumni includes multiple fellows of the Royal Society, heads of state, and Nobel Priz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Plume
A river plume is a Fresh water, freshened water mass that is formed in the sea as a result of mixing of Surface runoff, river discharge and saline seawater. River plumes are formed in coastal sea areas at many regions in the World. River plumes generally occupy wide-but-shallow sea surface layers bounded by sharp density gradient, density gradients. The area of a river plume is 3-5 orders of magnitude greater than its depth; therefore, even small rivers with Discharge (hydrology), discharge rates ~1–10 m/s form river plumes with horizontal spatial extents ~10–100 m. Areas of river plumes formed by the largest rivers are ~100–1000 km2. Despite the relatively small volume of total Fresh water, freshwater Discharge (hydrology), runoff to the World Ocean, river plumes occupy up to 21% of Continental shelf, shelf areas of the ocean, i.e., several million square kilometers. In some occasions river plumes are spoken of as Region of freshwater influence, regions of fresh water influe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plume (fluid Dynamics)
In hydrodynamics, a plume or a column is a vertical body of one fluid moving through another. Several effects control the motion of the fluid, including momentum (inertia), diffusion and buoyancy (density differences). Pure '' jets'' and pure ''plumes'' define flows that are driven entirely by momentum and buoyancy effects, respectively. Flows between these two limits are usually described as forced plumes or buoyant jets. "Buoyancy is defined as being positive" when, in the absence of other forces or initial motion, the entering fluid would tend to rise. Situations where the density of the plume fluid is greater than its surroundings (i.e. in still conditions, its natural tendency would be to sink), but the flow has sufficient initial momentum to carry it some distance vertically, are described as being negatively buoyant. Movement Usually, as a plume moves away from its source, it widens because of entrainment of the surrounding fluid at its edges. Plume shapes can be influenced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Plume
A river plume is a Fresh water, freshened water mass that is formed in the sea as a result of mixing of Surface runoff, river discharge and saline seawater. River plumes are formed in coastal sea areas at many regions in the World. River plumes generally occupy wide-but-shallow sea surface layers bounded by sharp density gradient, density gradients. The area of a river plume is 3-5 orders of magnitude greater than its depth; therefore, even small rivers with Discharge (hydrology), discharge rates ~1–10 m/s form river plumes with horizontal spatial extents ~10–100 m. Areas of river plumes formed by the largest rivers are ~100–1000 km2. Despite the relatively small volume of total Fresh water, freshwater Discharge (hydrology), runoff to the World Ocean, river plumes occupy up to 21% of Continental shelf, shelf areas of the ocean, i.e., several million square kilometers. In some occasions river plumes are spoken of as Region of freshwater influence, regions of fresh water influe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coastal Geography
Coastal geography is the study of the constantly changing region between the ocean and the land, incorporating both the physical geography (i.e. coastal geomorphology, climatology and oceanography) and the human geography (sociology and history) of the coast. It includes understanding coastal weathering processes, particularly wave action, sediment movement and weather, and the ways in which humans interact with the coast. Wave action and longshore drift The waves of different strengths that constantly hit against the shoreline are the primary movers and shapers of the coastline. Despite the simplicity of this process, the differences between waves and the rocks they hit result in hugely varying shapes. The effect that waves have depends on their strength. Strong waves, also called destructive waves, occur on high-energy beaches and are typical of winter. They reduce the quantity of sediment present on the beach by carrying it out to bars under the sea. Constructive, weak wave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Oceanography
Physical oceanography is the study of physical conditions and physical processes within the ocean, especially the motions and physical properties of ocean waters. Physical oceanography is one of several sub-domains into which oceanography is divided. Others include biological, chemical and geological oceanography. Physical oceanography may be subdivided into ''descriptive'' and ''dynamical'' physical oceanography. Descriptive physical oceanography seeks to research the ocean through observations and complex numerical models, which describe the fluid motions as precisely as possible. Dynamical physical oceanography focuses primarily upon the processes that govern the motion of fluids with emphasis upon theoretical research and numerical models. These are part of the large field of Geophysical Fluid Dynamics (GFD) that is shared together with meteorology. GFD is a sub field of Fluid dynamics describing flows occurring on spatial and temporal scales that are greatly influenced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquatic Ecology
An aquatic ecosystem is an ecosystem found in and around a body of water, in contrast to land-based terrestrial ecosystems. Aquatic ecosystems contain communities of organisms—aquatic life—that are dependent on each other and on their environment. The two main types of aquatic ecosystems are marine ecosystems and freshwater ecosystems. Freshwater ecosystems may be lentic (slow moving water, including pools, ponds, and lakes); lotic (faster moving water, for example streams and rivers); and wetlands (areas where the soil is saturated or inundated for at least part of the time). Types Marine ecosystems Marine coastal ecosystem Marine surface ecosystem Freshwater ecosystems Lentic ecosystem (lakes) Lotic ecosystem (rivers) Wetlands Functions Aquatic ecosystems perform many important environmental functions. For example, they recycle nutrients, purify water, attenuate floods, recharge ground water and provide habitats for wildlife. The biota of an aqua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estuaries
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environments and are an example of an ecotone. Estuaries are subject both to marine influences such as tides, waves, and the influx of saline water, and to fluvial influences such as flows of freshwater and sediment. The mixing of seawater and freshwater provides high levels of nutrients both in the water column and in sediment, making estuaries among the most productive natural habitats in the world. Most existing estuaries formed during the Holocene epoch with the flooding of river-eroded or glacially scoured valleys when the sea level began to rise about 10,000–12,000 years ago. Estuaries are typically classified according to their geomorphology, geomorphological features or to water-circulation patterns. They can have many different names, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limnology
Limnology ( ; ) is the study of inland aquatic ecosystems. It includes aspects of the biological, chemical, physical, and geological characteristics of fresh and saline, natural and man-made bodies of water. This includes the study of lakes, reservoirs, ponds, rivers, springs, streams, wetlands, and groundwater.) Water systems are often categorized as either running ( lotic) or standing ( lentic). Limnology includes the study of the drainage basin, movement of water through the basin and biogeochemical changes that occur en route. A more recent sub-discipline of limnology, termed landscape limnology, studies, manages, and seeks to conserve these ecosystems using a landscape perspective, by explicitly examining connections between an aquatic ecosystem and its drainage basin. Recently, the need to understand global inland waters as part of the Earth system created a sub-discipline called global limnology. This approach considers processes in inland waters on a global scale, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
