1. Introduction
Oceanography is the investigation of features found in coastal water. It extends from shallow estuaries to deep oceans, everywhere sea water can be found. This involves a broad scope of issues, beginning with the physical aspects of coastal dynamics and coastal sedimentation to the seafloor’s geology and ecosystems comprised by marine life. Consequently, the study of the ocean is always a challenging and intriguing process when considering its size and global expanse. Features of oceans are complex and challenge for human beings to comprehend. All life and climatic changes depend on ocean dynamic fluctuations. There is no doubt that oceans are important to life on this planet. It is not easy to understand oceans because there are many factors which control their features. Scientists cannot study these factors individually as this will deliver imperfect information. For example, the chemical components of water shape the nature of which organisms inhabit the ocean. Consecutively, marine organisms supply deposits to shape the ocean floor’s geology.
2. Subdisciplines of oceanography
There are four major sub-disciplines of oceanography. These broader subjects are (i)marine chemistry, (ii) marine geology, (iii) marine biology and (iv) physical oceanography.
2.1. Marine chemistry
This is the examination of oceanic chemistry. With regard to this, the ocean contains practically all the element which exist in the periodic table. Therefore, the dynamic changes of these chemical elements can be studied within the Earth’s oceans. Scientists study the dynamic cycling of these elements in both oceans and adjacent land. In addition, scientists identify advanced cycles - known as a biogeochemical cycles, the cycling of substances or substance turnover. These are considered routes by which a chemical substances interchanges in the biosphere (i.e., biotic and lithosphere), atmosphere and hydrosphere (i.e., abiotic partitions of the Earth [3]).
The term "biogeochemical" expresses the involvement of biological, geological and chemical factors in ocean studies. For instance, the distribution of carbon, oxygen, nitrogen, phosphorus, calcium and water, etc., within the physical and biological system – this is known as a biogeochemical cycle [3].
2.2. Marine geology
Marine geology studies the early and recent structure of the ocean floor. It also explores the heritage of the dynamic changes and the development of underwater features within the landscape. Marine geology correspondingly investigates the chemical and physical properties of ocean floor sediments and rocks. In addition, it implies geochemical, geophysical, sedimentological and paleontological examination of the ocean floor and coastal zones. Thus, marine geology has extremely robust bonds to physical oceanography (e.g., alongshore currents which are induced because the oblique wave propagation can cause sediment transport along coastal waters [9]).
The study of the ocean floor is a corner stone to predicate the Earth’s climate changes. The investigation of climate and weather patterns over hundreds of millions of years is a study known as paleoclimatology - under ocean floor sediments can be collected using resolution drills taking sediment-core samples[7, 9].
2.3. Marine biology
Marine biology investigates exactly how every one of the sub-fields of oceanography operate either discretely or simultaneously to affect the circulation of animals and marine plants along with what purpose marine organisms perform relative to their environment. Marine biology additionally emphasizes the way species fit with conservational fluctuations (e.g., increased water temperature, artificial and natural instabilities, and pollution). A natural turbulence can be caused by the explosion of an underwater volcano or a hurricane, whilst an oil spill and overfishing represent an artificial disturbance [9, 11].
Marine biotechnology is a new technology which is expanding the opportunity to investigate in which way marine resources can be expended to develop medical industry, ecological inventions, and food technology.
2.4. Physical oceanography
Physical oceanography models the dynamic relationship between the ocean’s physical properties, the atmosphere, and the coast and seafloor. The ocean’s physical properties include temperature, salinity, and density variations. The ocean’s dynamic components are waves, current, and tides. Physical oceanographers additionally investigate the manner by which the ocean interacts with the Earth’s atmosphere to generate climate and weather systems [2, 7, 12].
Under this circumstance, physical oceanography theories and models must extremely be instigated to investigate the mystery of flight MH370 [1, 17]. The observational procedures which are taught to undergraduates of physical oceanography do not work in this case. Indeed, standard and modified models are required to verify the information from the
For instance, the turbulent water flow throughout the southern top of Africa - known as the Agulhas Current - is a portion of a superior “ocean conveyor belt” which distributes the water across the globe. The Agulhas Current is based on currents, wind, and water density changes. Scientists have defined a new finding, named the Agulhas leakage. This represents the increments of water flow from the southern Indian Ocean into the Atlantic Ocean. It may well be that flight MH370 debris moved to the Atlantic Ocean through the Agulhas leakage [7, 8].
Modern physical oceanography studies predict that the ocean conveyor belt will be slow down, something which could cause dramatic changes to weather and climate patterns, and consequently sea level rise due to the melting of ice caps. This melting could reduce the salinity of ocean water and change its biogeochemical matrix.
3. The significance of oceanography and coastal studies
The main question which can of course be raised is why ocean and coastal studies are important to our lives? This book covers some significant aspects of coastal studies. There are countless benefits to be gained from coastal studies which may represent solutions to many economic crises around the world. Due to the huge coverage of the oceans, which are approximately 70% of the Earth’s surface, the ocean plays a tremendous role for transportation, natural resources, weather and climate, biodiversity, and the economy[2, 8].
3.1. Transportation
Cities which are located on the coast and have harbors always have great benefits, however, they are exposed to pollution from time to time [2, 7].
3.2. Natural resources
The ocean floor is rich in oil and natural gases - not only for benthic organisms. The ocean floor and continental shelf contains numerous minerals. However, 50% of nations cannot discover the wealth of resources stored in their continental shelves and ocean floors [2, 8, 11].
3.3. Weather and climate
The oceans interact in tandem with the atmosphere and influence worldwide climate and weather. Whilst the air circulates over the warm ocean, it escalates because of warming. When it cools, the condensation induces precipitation. For instance, the Gulf Stream, synchronized withwarm air flowing toward northern Europe, makes winters tolerable [5, 12, 16].
3.4. Biodiversity
A wide number of discrete species of organisms have an extraordinary biodiversity due to the existence of salt marshes, coral reefs, estuaries, seagrass beds, and mangrove [15]. The brackish water of estuaries is key for fish and others marine organisms. Furthermore, coral reefs sustain, along with estuaries, approximately 75% of living marine organisms and fish. With this regard, reefs and estuaries represent shelter for fish because of the accumulation of food and nutrients both required for feeding and nursing [14]. Moreover, birds reside along the sandy shores which represent a source of food – e.g., burrowing worms and fiddler crabs [4, 5, 8, 11, 13].
3.5. Economy
The significance of the ocean cannot be deliberated easily. Economic income is a function of shipping, marine biomedical products, fish industries, and oil and gas mining. Furthermore, beautiful beaches and islands are a corner stone for income as they attract a large number of tourists. In general coastal studies are important to policy makers, allowing them to minimize the effects of marine pollution to ecologically sensitive zones along the shorelines. Hence, pollution-free zones will attract more tourists and boost national economies [8].
3.6. Coastal engineering
Coastal engineers also required information about ocean and coastal dynamics before handing out offshore construction contracts. Furthermore, coastal studies can sustain shoreline changes and assist decision-makers in understanding the mechanisms of sediment transport in order to avoid erosion and sedimentation problems. In addition, information about salinity and temperature can be used to avoid the problem of corrosion to ships, pipelines, and coastal structures containing iron [3, 8].
4. Outline of this book
This book examines the impact of physical oceanography parameters on several applications which range from mercury circulation, corrosion due to salinity, and coastal sedimentation to monitoring the coastal environment using geographical information systems (GIS) and remote sensing. Furthermore, the marine ecology study in this book covers a broad spectrum of clues about the physico-chemical properties of coastal waters. The significance of this study is the integration between different aspects of oceanography with wind monsoon pattern changes. Consequently, salinity and phytoplankton are the main factors that impact zooplankton growth and proliferation [10,11]. Most of the work represented in this book is based on accurate in-situ observationIndeed, the British National Antarctic Expedition which is known as the
This book contains 16 chapters, as follows:
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