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Robert Dyrenforth
Weather modification is the act of intentionally manipulating or altering the weather. The most common form of weather modification is cloud seeding, which increases rain or snow, usually for the purpose of increasing the local water supply. Weather modification can also have the goal of preventing damaging weather, such as hail or hurricanes, from occurring; or of provoking damaging weather against the enemy, as a tactic of military or economic warfare like Operation Popeye, where clouds were seeded to prolong the monsoon in Vietnam. Weather modification in warfare has been banned by the United Nations under the Environmental Modification Convention. History A popular belief in Northern Europe that shooting prevents hail caused many agricultural towns to fire cannons without ammunition. Veterans of the Seven Years' War, Napoleonic wars, and the American Civil War reported that rain fell after every large battle. After their stories were collected in ''War and Weather'', the Un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Dyrenforth
Weather modification is the act of intentionally manipulating or altering the weather. The most common form of weather modification is cloud seeding, which increases rain or snow, usually for the purpose of increasing the local water supply. Weather modification can also have the goal of preventing damaging weather, such as hail or hurricanes, from occurring; or of provoking damaging weather against the enemy, as a tactic of military or economic warfare like Operation Popeye, where clouds were seeded to prolong the monsoon in Vietnam. Weather modification in warfare has been banned by the United Nations under the Environmental Modification Convention. History A popular belief in Northern Europe that shooting prevents hail caused many agricultural towns to fire cannons without ammunition. Veterans of the Seven Years' War, Napoleonic wars, and the American Civil War reported that rain fell after every large battle. After their stories were collected in ''War and Weather'', the Un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver Iodide
Silver iodide is an inorganic compound with the formula Ag I. The compound is a bright yellow solid, but samples almost always contain impurities of metallic silver that give a gray coloration. The silver contamination arises because AgI is highly photosensitive. This property is exploited in silver-based photography. Silver iodide is also used as an antiseptic and in cloud seeding. Structure The structure adopted by silver iodide is temperature dependent: *Below 420 K, the β phase of AgI, with the wurtzite structure, is most stable. This phase is encountered in nature as the mineral iodargyrite. *Above 420 K, the α phase becomes more stable. This motif is a body-centered cubic structure which has the silver centers distributed randomly between 6 octahedral, 12 tetrahedral and 24 trigonal sites. At this temperature, Ag+ ions can move rapidly through the solid, allowing fast ion conduction. The transition between the β and α forms represents the melting of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cloud Seeding
Cloud seeding is a type of weather modification that aims to change the amount or type of precipitation that falls from clouds by dispersing substances into the air that serve as cloud condensation or ice nuclei, which alter the microphysical processes within the cloud. Its effectiveness is debated; some studies have suggested that it is "difficult to show clearly that cloud seeding has a very large effect." The usual objective is to increase precipitation (rain or snow), either for its own sake or to prevent precipitation from occurring in days afterward. Methodologies Salts The most common chemicals used for cloud seeding include silver iodide, potassium iodide and dry ice (solid carbon dioxide). Liquid propane, which expands into a gas, has also been used. This can produce ice crystals at higher temperatures than silver iodide. After promising research, the use of hygroscopic materials, such as table salt, is becoming more popular. When cloud seeding, increased snowfall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abu Dhabi Emirate
The Emirate of Abu Dhabi (, , or ; ar, إِمَارَةْ أَبُوظَبِي , ) is one of seven emirates that constitute the United Arab Emirates (UAE). It is by far the largest emirate, accounting for 87% of the nation's total land area or 67,340 km2 (or 26,000 sq mi). Abu Dhabi also has the second-largest population of the seven emirates. In June 2011 this was estimated to be 2,120,700 people, of which 439,100 people (less than 21%) were Emirati citizens. The city of Abu Dhabi, after which the emirate is named, is the capital of both the emirate and federation. In the early 1970s, two important developments influenced the status of the Emirate of Abu Dhabi. The first was the establishment of the United Arab Emirates in December 1971, with Abu Dhabi as its political and administrative capital. The second was the sharp increase in oil prices following the October 1973 War, which accompanied a change in the relationship between the oil countries and foreign oil companies, l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oman
Oman ( ; ar, عُمَان ' ), officially the Sultanate of Oman ( ar, سلْطنةُ عُمان ), is an Arabian country located in southwestern Asia. It is situated on the southeastern coast of the Arabian Peninsula, and spans the mouth of the Persian Gulf. Oman shares land borders with Saudi Arabia, the United Arab Emirates, and Yemen, while sharing Maritime boundary, maritime borders with Iran and Pakistan. The coast is formed by the Arabian Sea on the southeast, and the Gulf of Oman on the northeast. The Madha and Musandam Governorate, Musandam exclaves are surrounded by the United Arab Emirates on their land borders, with the Strait of Hormuz (which it shares with Iran) and the Gulf of Oman forming Musandam's coastal boundaries. Muscat is the nation's capital and largest city. From the 17th century, the Omani Sultanate was Omani Empire, an empire, vying with the Portuguese Empire, Portuguese and British Empire, British empires for influence in the Persian Gulf and Indian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al Ain
Al Ain ( ar, ٱلْعَيْن, , ) is a city in the western side of Tawam (region), Tuwwam region and the seat of the administrative division of its namesake, Al-Ain Region, Abu Dhabi, Al Ain in the Emirate of Abu Dhabi, United Arab Emirates. It is Oman–United Arab Emirates border, bordered to the east by the Omani town of Al-Buraimi in the Al Buraimi Governorate. It is the largest inland city in the Emirates, the List of cities in the United Arab Emirates, fourth-largest city (after Dubai, Abu Dhabi, and Sharjah), and the second-largest in the Emirate of Abu Dhabi. The Controlled-access highway, freeways connecting Al-Ain, Abu Dhabi, and Dubai form a geographic triangle in the country, each city being roughly from the other two. Al-Ain is known as the "Garden City" ( ar, مَدِيْنَة ٱلْحَدِيْقَة, Madīnat Al-Ḥadīqah, lit=City of The Garden) of Emirate of Abu Dhabi, Abu Dhabi, the UAE or the Persian Gulf, Gulf, due to its greenery, particularly with reg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Arab Emirates
The United Arab Emirates (UAE; ar, اَلْإِمَارَات الْعَرَبِيَة الْمُتَحِدَة ), or simply the Emirates ( ar, الِْإمَارَات ), is a country in Western Asia (The Middle East). It is located at the eastern end of the Arabian Peninsula and shares borders with Oman and Saudi Arabia, while having maritime borders in the Persian Gulf with Qatar and Iran. Abu Dhabi is the nation's capital, while Dubai, the most populous city, is an international hub. The United Arab Emirates is an elective monarchy formed from a federation of seven emirates, consisting of Abu Dhabi (the capital), Ajman, Dubai, Fujairah, Ras Al Khaimah, Sharjah and Umm Al Quwain. Each emirate is governed by an emir and together the emirs form the Federal Supreme Council. The members of the Federal Supreme Council elect a president and vice president from among their members. In practice, the emir of Abu Dhabi serves as president while the ruler of Dubai is vice pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abu Dhabi
Abu Dhabi (, ; ar, أَبُو ظَبْيٍ ' ) is the capital and second-most populous city (after Dubai) of the United Arab Emirates. It is also the capital of the Emirate of Abu Dhabi and the centre of the Abu Dhabi Metropolitan Area. The city of Abu Dhabi is located on an island in the Persian Gulf, off the Central West Coast. Most of the city and the Emirate reside on the mainland connected to the rest of the country. , Abu Dhabi's urban area had an estimated population of 1.5 million, out of 2.9 million in the emirate of Abu Dhabi, as of 2016. The Abu Dhabi Investment Authority is headquartered in the city, and was the world's 5th largest sovereign wealth fund in 2021. Abu Dhabi itself has over a trillion US dollars worth of assets under management in a combination of various sovereign wealth funds headquartered there. Abu Dhabi houses local and federal government offices and is the home of the United Arab Emirates Government and the Supreme Petroleum C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Rainmaking Project
The Thailand Royal Rainmaking Project ( th, โครงการฝนหลวง, ) was initiated in November 1955 by King Bhumibol Adulyadej. Thai farmers repeatedly suffered the effects of drought. The king resolved to do something about it and proposed a solution to the dearth of rain: artificial rainmaking, or cloud seeding. The program is run by the Department of Royal Rainmaking and Agricultural Aviation. History The king discovered that many areas faced the problem of drought. Over 82% of Thai agricultural land relied on rainfall. Thai farmers were not able to grow crops for lack of water. Although scientific evidence seems to suggest that cloud seeding does not ameliorate droughts, the Royal Rainmaking Project debuted on 20 July 1969 at the king's behest, when the first rainmaking attempt was made at Khao Yai National Park. Dry ice flakes were scattered over clouds. Reportedly, some rainfall resulted. In 1971, the government established the Artificial Rainmaking Researc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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