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Dragon Hole
Dragon Hole, also known as Yongle Blue Hole named after the third Ming emperor, is the deepest known blue hole in the world at deep. It is located about north of Drummond Island in the Paracel Islands. Blue holes generate a distinctive blue colour when seen from above. They are characteristically only dozens of metres deep. The local fishermen call it the "eye" of the South China Sea, and according to legend it is where the Monkey King, depicted in the novel ''Journey to the West'', found his golden cudgel. Dragon Hole is about deeper than Dean's Blue Hole in the Bahamas. There are several fresh water sinkholes on land that are deeper than Dragon Hole. These include Mexico's Zacatón (), Pozzo del Merro in Italy () and Hranice abyss in the Czech Republic (). The Sansha Yongle Blue hole was created around the same time as the surrounding South China Sea islands. Blue holes can be formed in a number of ways. The most common is melting ice structures in the surface resulti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yongle
Yongle () (23 January 1403 – 19 January 1425) was the era name of the Yongle Emperor, the third emperor of the Ming dynasty of China. Comparison table Other eras contemporaneous with Yongle * Vietnam ** ''Thiệu Thành'' (紹成, 1401–1402): Hồ dynasty — era name of Hồ Hán Thương ** ''Khai Đại'' (開大, 1403–1407): Hồ dynasty — era name of Hồ Hán Thương ** ''Hưng Khánh'' (興慶, 1407–1409): Later Trần dynasty — era name of Trần Ngỗi ** ''Trùng Quang'' (重光, 1409–1413): Later Trần dynasty — era name of Trần Quý Khoáng ** ''Vĩnh Ninh'' (永寧, 1419–1420): Jiaozhi Province — era name of Phạm Ngọc (范玉) ** ''Vĩnh Thiên'' (永天, 1420): Jiaozhi Province — era name of Lê Ngạ (黎餓) * Japan ** ''Ōei'' (応永, 1394–1428): Japan — era name of Emperor Go-Komatsu and Emperor Shōkō See also * List of Chinese era names * List of Ming dynasty era names The Ming dynasty was the last unified dynast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pozzo Del Merro
Pozzo del Merro is a flooded sinkhole in the countryside northeast of Rome, Italy. Situated at the bottom of an 80 m conical pit, at it is the second deepest underwater vertical cave in the world. In 2000 two ROVs were sent to explore its depths; the first, the "Mercurio (Mercury)" reached its maximum operative depth of without reaching the bottom. The second ROV, "Hyball 300", reached without touching down either. A third dive in 2002 with the more advanced "Prometeo" robot reached the bottom at , but discovered a narrow passage continuing horizontally. The sinkhole, similar to the Zacatón cenote, was formed by volcanic activity eroding the carbonate rock Carbonate rocks are a class of sedimentary rocks composed primarily of carbonate minerals. The two major types are limestone, which is composed of calcite or aragonite (different crystal forms of CaCO3), and dolomite rock (also known as dolosto .... References Sinkholes of Italy Metropolitan City of Rome Capita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermocline
A thermocline (also known as the thermal layer or the metalimnion in lakes) is a thin but distinct layer in a large body of fluid (e.g. water, as in an ocean or lake; or air, e.g. an atmosphere) in which temperature changes more drastically with depth than it does in the layers above or below. In the ocean, the thermocline divides the upper mixed layer from the calm deep water below. Depending largely on season, latitude, and turbulent mixing by wind, thermoclines may be a semi-permanent feature of the body of water in which they occur, or they may form temporarily in response to phenomena such as the radiative heating/cooling of surface water during the day/night. Factors that affect the depth and thickness of a thermocline include seasonal weather variations, latitude, and local environmental conditions, such as tides and currents. Oceans Most of the heat energy of the sunlight that strikes the Earth is absorbed in the first few centimeters at the ocean's surface, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Remotely Operated Underwater Vehicle
A remotely operated underwater vehicle (technically ROUV or just ROV) is a tethered underwater mobile device, commonly called ''underwater robot''. Definition This meaning is different from remote control vehicles operating on land or in the air. ROVs are unoccupied, usually highly maneuverable, and operated by a crew either aboard a vessel/floating platform or on proximate land. They are common in deepwater industries such as offshore hydrocarbon extraction. They are linked to a host ship by a neutrally buoyant tether or, often when working in rough conditions or in deeper water, a load-carrying umbilical cable is used along with a tether management system (TMS). The TMS is either a garage-like device which contains the ROV during lowering through the splash zone or, on larger work-class ROVs, a separate assembly which sits on top of the ROV. The purpose of the TMS is to lengthen and shorten the tether so the effect of cable drag where there are underwater currents is minimize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Level Rise
Globally, sea levels are rising due to human-caused climate change. Between 1901 and 2018, the globally averaged sea level rose by , or 1–2 mm per year on average.IPCC, 2019Summary for Policymakers InIPCC Special Report on the Ocean and Cryosphere in a Changing Climate .-O. Pörtner, D.C. Roberts, V. Masson-Delmotte, P. Zhai, M. Tignor, E. Poloczanska, K. Mintenbeck, A. Alegría, M. Nicolai, A. Okem, J. Petzold, B. Rama, N.M. Weyer (eds.) Cambridge University Press, Cambridge, UK and New York, NY, USA. https://doi.org/10.1017/9781009157964.001. This rate is accelerating, with sea levels now rising by 3.7 mm per year. Climate scientists expect further acceleration during the 21st century. Climate change heats (and therefore expands) the ocean and melts land-based ice sheets and glaciers. Between 1993 and 2018, the thermal expansion of water contributed 42% to sea level rise; melting of temperate glaciers, 21%; Greenland, 15%; and Antarctica, 8%. Over the next 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hranice Abyss
Hranice Abyss ( cs, Hranická propast) is the deepest flooded pit cave in the world. It is a karst sinkhole near the town of Hranice, Czech Republic. The greatest confirmed depth is , of which is underwater. In 2020, a scientific expedition to the cave revealed that part of the system apparently reaches 1 kilometre deep, albeit with the lowest reaches sediment-filled. Analysis of the water found carbon and helium isotopes which implied that the cave has been formed by acidic waters, heated by the mantle, welling up from below. Description It is located near the Zbrašov Aragonite Caves, which are open to the public. The total depth of the abyss (at least 473.5 m) is unknown, as the lower part of the abyss is flooded by the Hranice Lake. The abyss has an elliptical shape and is situated in the SE-SW direction. It is approximately 110 metres long at its longest point and 50 metres wide at its widest point. For most visitors the most interesting figure is the depth of the abyss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dow Jones & Company
Dow Jones & Company, Inc. is an American publishing firm owned by News Corp and led by CEO Almar Latour. The company publishes ''The Wall Street Journal'', ''Barron's'', ''MarketWatch'', ''Mansion Global'', ''Financial News'' and ''Private Equity News''. It formerly published the Dow Jones Industrial Average. History The company was founded in 1882 by three reporters: Charles Dow, Edward Jones, and Charles Bergstresser. Charles Dow was widely known for his ability to break down and convey what was often considered very convoluted financial information and news to the general public - this is one of the reasons why Dow Jones & Company is well known for their publications and transferring of important and sometimes difficult to understand financial information to people across the globe. Nevertheless, the three reporters were joined in control of the organization by Thomas F. Woodlock. Dow Jones was acquired in 1902 by Clarence Barron, the leading financial journalist of the da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Wall Street Journal
''The Wall Street Journal'' is an American business-focused, international daily newspaper based in New York City, with international editions also available in Chinese and Japanese. The ''Journal'', along with its Asian editions, is published six days a week by Dow Jones & Company, a division of News Corp. The newspaper is published in the broadsheet format and online. The ''Journal'' has been printed continuously since its inception on July 8, 1889, by Charles Dow, Edward Jones, and Charles Bergstresser. The ''Journal'' is regarded as a newspaper of record, particularly in terms of business and financial news. The newspaper has won 38 Pulitzer Prizes, the most recent in 2019. ''The Wall Street Journal'' is one of the largest newspapers in the United States by circulation, with a circulation of about 2.834million copies (including nearly 1,829,000 digital sales) compared with ''USA Today''s 1.7million. The ''Journal'' publishes the luxury news and lifestyle magazine ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huffington Post
''HuffPost'' (formerly ''The Huffington Post'' until 2017 and sometimes abbreviated ''HuffPo'') is an American progressive news website, with localized and international editions. The site offers news, satire, blogs, and original content, and covers politics, business, entertainment, environment, technology, popular media, lifestyle, culture, comedy, healthy living, women's interests, and local news featuring columnists. It was created to provide a progressive alternative to the conservative news websites such as the Drudge Report. The site offers content posted directly on the site as well as user-generated content via video blogging, audio, and photo. In 2012, the website became the first commercially run United States digital media enterprise to win a Pulitzer Prize. Founded by Andrew Breitbart, Arianna Huffington, Kenneth Lerer, and Jonah Peretti, the site was launched on May 9, 2005 as a counterpart to the Drudge Report. In March 2011, it was acquired by AOL for US$315&n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zacatón
Zacatón is a cenote (a thermal water-filled sinkhole) belonging to the Zacatón system - a group of unusual karst features located in Aldama Municipality near the Sierra de Tamaulipas in the northeastern state of Tamaulipas, Mexico. It is the deepest known water-filled sinkhole in the world with a total depth of . The deep Pozzo del Merro is deeper (actual depth unknown), but Using an autonomous robot, the underwater portion of Zacatón has been measured to be deep (a difference between the rim of cliff and surface of water adds to the total depth). Zacatón is the only sinkhole of the five located in Rancho La Azufrosa to have any noticeable water flow. The name Zacatón comes from the free-floating islands of zacate grass which move around on the surface with the wind. Scrapings from the rock walls beneath the surface yielded at least three new phyla of bacteria. Diving El Zacatón's depth has made it an important dive site: * Dr. Ann Kristovich set the women's wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paracel Islands
The Paracel Islands, also known as the Xisha Islands () and the Hoang Sa Archipelago ( vi, Quần đảo Hoàng Sa, lit=Yellow Sand Archipelago), are a disputed archipelago in the South China Sea. The archipelago includes about 130 small coral islands and reefs, most grouped into the northeastern Amphitrite Group or the western Crescent Group. They are distributed over a maritime area of around , with a land area of approximately . The name ''Paracel'' is of Portuguese origin, and appears on 16th-century Portuguese maps. The archipelago is approximately equidistant from the coastlines of the People's Republic of China (PRC) and Vietnam, and approximately one-third of the way from central Vietnam to the northern Philippines. The archipelago includes Dragon Hole, the deepest underwater sinkhole in the world. Turtles and seabirds are native to the islands, which have a hot and humid climate, abundant rainfall and frequent typhoons. The archipelago is surrounded by productive fishin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bahamas
The Bahamas (), officially the Commonwealth of The Bahamas, is an island country within the Lucayan Archipelago of the West Indies in the Atlantic Ocean, North Atlantic. It takes up 97% of the Lucayan Archipelago's land area and is home to 88% of the archipelago's population. The archipelagic state consists of more than 3,000 islands, cays, and islets in the Atlantic Ocean, and is located north of Cuba and northwest of the island of Hispaniola (split between the Dominican Republic and Haiti) and the Turks and Caicos Islands, southeast of the U.S. state of Florida, and east of the Florida Keys. The capital is Nassau, Bahamas, Nassau on the island of New Providence. The Royal Bahamas Defence Force describes The Bahamas' territory as encompassing of ocean space. The Bahama Islands were inhabited by the Lucayan people, Lucayans, a branch of the Arawakan-Taino language, speaking Taíno, for many centuries. Christopher Columbus was the first European to see the islands, making hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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