shear instability
21Horizontal convective rolls — producing cloud streets (lower left portion of the image) over the Bering Sea …
22Bulk Richardson number — DefinitionThe Bulk Richardson Number (BRN) is a dimensionless number in meteorology relating vertical stability and vertical shear (generally, stability divided by shear). It represents the ratio of thermally produced turbulence and turbulence… …
23Atmospheric convection — Conditions favorable for thunderstorm types and complexes Atmospheric convection is the result of a parcel environment instability, or temperature difference, layer in the atmosphere. Different lapse rates within dry and moist air lead to… …
24Cyclogenesis — The initial frontal wave (or low pressure area) forms at the location of the red dot on the image. It is usually perpendicular (at a right angle) to the leaf like cloud formation (baroclinic leaf) seen on satellite during the early stage of… …
25Ogaden Basin — The Ogaden Basin is an area of Ogadkenya that may hold significant reserves of crude oil and natural gas.[1] The basin covers an area of some 350,000 square kilometres (135,000 square miles) and is formed from sedimentary rocks up to 10,000… …
261998 Comfrey – St. Peter tornado outbreak — Infobox tornado outbreak|name=1998 Comfrey ndash; St. Peter tornado outbreak date=March 29, 1998 image location=Csptornado2.jpg duration=4 hours fujitascale=F4 tornadoes=16 total damages (USD)=$235 million total fatalities=2 areas… …
271998 Comfrey — – St. Peter tornado outbreak A house blown off its foundation near Hanska, Minnesota …
28Cyclone — This article is about the meteorological phenomenon. For other uses, see Cyclone (disambiguation). Polar low over the Barents Sea on February 27, 1987 In meteorology, a cyclone is an area of closed, circular fluid motion rotating in the same… …
29Avalanche — This article refers to the natural event. For other uses, see Avalanche (disambiguation) An avalanche is an abrupt and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are among the biggest dangers in the… …
30Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
