Hence circulation here is quite different from the Black Sea and Mediterranean Sea. Also, I suggest you to start from the very basics of Geography so that you can understand the concepts better.
Thank you sir. Use Mixed Letters instead. In the above notes Irish sea has been mentioned both under Arctic and Atlantic. Add Comment. Post Comment. If we bring out the Updated New Editions of the Static Files within your membership period , you will be able to download them without paying anything extra.
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Marginal Seas In oceanography, a marginal sea is a sea partially enclosed by islands, archipelagos, or peninsulas. The primary differences between marginal seas and open oceans are associated with depth and proximity to landmasses.
Marginal seas, which are generally shallower than open oceans, are more influenced by human activities, river runoff, climate, and water circulation. The Caspian Sea is also sometimes defined as a marginal sea, and also the Dead Sea. Human Impact on marginal seas Marginal seas are more susceptible to pollution than open ocean regions because of the high concentration of human activities near coastlines and rivers.
The greatest human impact on marginal seas is related to the fisheries industry. Other human activities that have adversely affected marginal seas include industrial sewage disposal, offshore oil drilling, and accidental releases of pollutants, including petroleum products, radioactive waste, detergents, and plastics.
Pollutants from the nearby landmasses are introduced into marginal seas in concentrations that are thousands of times greater than in open oceans. The color difference shown here is due to a phytoplankton bloom occurring in the Black Sea. Phytoplankton are good as fish feed on them.
Bays, gulfs, and straits are types of waterbodies that are contained within a larger body of water near land. These three waterbodies are usually located at important points of human activities; thus, conflicts with nature and neighbors can result.
An infrared photograph of the San Francisco Bay area, taken from the space shuttle Discovery, shows the bay's shape and the heavy development in the region.
A bay is a small body of water or a broad inlet that is set off from a larger body of water generally where the land curves inward. Bays usually occur on oceans, lakes, and gulfs, and generally not on rivers except when there is an artificially enlarged river mouth.
All bays are important to the continued health of the surrounding environment. However, these bays can be degraded when the water's natural state is changed by the introduction of foreign materials into water flowing into the bay, or into the bay itself.
This aquatic system supports more than species of fish and is a waterfowl migration and wintering area. Although known for its natural beauty and importance to the health of its surrounding area, the San Francisco Bay has been degraded by many human activities such as commerce and recreation.
For example, more than 95 percent of the tidal marshes along the shore have been filled. Large reductions and in some cases losses in fish and wildlife habitat have resulted. The flow of fresh water into the estuary and the delta also has been reduced due to diversion of the water by pumps within the delta, thereby increasing the estuary's salinity. A gulf is a large body of water, sometimes with a narrow mouth, that is almost completely surrounded by land.
It can be considered a large bay. The world's largest gulf is the Gulf of Mexico, with a total surface area of about 1,, square kilometers , square miles. Difference between gulf and strait. A strait is a strip of water that separates two lands or two large bodies of water. Gulfs are more useful for human settlements, as such areas provide easy access to the ocean while being well protected as well.
Straits are mostly discussed with regards to the ocean. Gulf is a large body of water. Related Questions:. Impact of monsoon in Indian climate. Describe the importance India in the eastern world. Discuss the statement. You can study other questions, MCQs, videos and tests for Class 11 on EduRev and even discuss your questions like Difference between gulf and strait? Apart from being the largest Class 11 community, EduRev has the largest solved Question bank for Class Upgrade to Infinity.
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