Home > Terms > English (EN) > banner cloud
banner cloud
A cloud plume often observed to extend downwind from isolated, sharp, often pyramid-shaped mountain peaks, even on otherwise cloud-free days. The Matterhorn and Mount Everest are two notable peaks where banner clouds have been frequently observed. The physics of the formation of such clouds is not completely understood. The aerodynamics of the flow around the peak produces flow separation and dynamically induced pressure reductions to the lee of the mountain peaks. The magnitude of the leeside pressure deficits increases with height to a maximum near the top of the peak, producing an upslope pressure gradient and upslope flow along the lee slope of the mountain. When the air near the base of the mountain is sufficiently moist, it ascends in the upslope flow, condenses, and forms a triangular- shaped cloud, the banner cloud, to the lee of the peak. Because of its unusual shape and location, this cloud strongly resembles snow blowing off the peak (snow banner), and it is often difficult to tell the difference.
- Part of Speech: noun
- Synonym(s): cloud_banner
- Blossary:
- Industry/Domain: Weather
- Category: Meteorology
- Company: AMS
- Product:
- Acronym-Abbreviation:
Other Languages:
Member comments
Terms in the News
Billy Morgan
Sports; Snowboarding
The British snowboarder Billy Morgan has landed the sport’s first ever 1800 quadruple cork. The rider, who represented Great Britain in the 2014 Winter Olympics in Sochi, was in Livigno, Italy, when he achieved the man-oeuvre. It involves flipping four times, while body also spins with five complete rotations on a sideways or downward-facing axis. The trick ...
Marzieh Afkham
Broadcasting & receiving; News
Marzieh Afkham, who is the country’s first foreign ministry spokeswoman, will head a mission in east Asia, the state news agency reported. It is not clear to which country she will be posted as her appointment has yet to be announced officially. Afkham will only be the second female ambassador Iran has had. Under the last shah’s rule, Mehrangiz Dolatshahi, a ...
Weekly Packet
Language; Online services; Slang; Internet
Weekly Packet or "Paquete Semanal" as it is known in Cuba is a term used by Cubans to describe the information that is gathered from the internet outside of Cuba and saved onto hard drives to be transported into Cuba itself. Weekly Packets are then sold to Cuban's without internet access, allowing them to obtain information just days - and sometimes hours - after it ...
Asian Infrastructure Investment Bank (AIIB)
Banking; Investment banking
The Asian Infrastructure Investment Bank (AIIB) is an international financial institution established to address the need in Asia for infrastructure development. According to the Asian Development Bank, Asia needs $800 billion each year for roads, ports, power plants or other infrastructure projects before 2020. Originally proposed by China in 2013, a signing ...
Spartan
Online services; Internet
Spartan is the codename given to the new Microsoft Windows 10 browser that will replace Microsoft Windows Internet Explorer. The new browser will be built from the ground up and disregard any code from the IE platform. It has a new rendering engine that is built to be compatible with how the web is written today. The name Spartan is named after the ...
Featured Terms
Kaley Cuoco
Kaley Christine Cuoco - born November 30, 1985 - is an American film and television actress. She first came to attention for her role as Bridget ...
Contributor
Featured blossaries
Browers Terms By Category
- Bread(293)
- Cookies(91)
- Pastries(81)
- Cakes(69)
Baked goods(534) Terms
- Natural gas(4949)
- Coal(2541)
- Petrol(2335)
- Energy efficiency(1411)
- Nuclear energy(565)
- Energy trade(526)
Energy(14403) Terms
- Mapping science(4042)
- Soil science(1654)
- Physical oceanography(1561)
- Geology(1407)
- Seismology(488)
- Remote sensing(446)
Earth science(10026) Terms
- Health insurance(1657)
- Medicare & Medicaid(969)
- Life insurance(359)
- General insurance(50)
- Commercial insurance(4)
- Travel insurance(1)
Insurance(3040) Terms
- Capacitors(290)
- Resistors(152)
- Switches(102)
- LCD Panels(47)
- Power sources(7)
- Connectors(7)