Natural Phenomenon
Hellllooooo again guys!
Today im gonna explain you about nature phenomenon.....
When you see these things, you will be happy if you like
rain and you will be sad if you are a sunny person! So, can you guess whatt??
YEAH, ITS ALL ABOUT.......... CLOUDS!
There 1 unique cloud that i want share with you! Lets go!!!
Morning Glory cloud
The Morning Glory cloud is a rare meteorological phenomenon
consisting of a low-level atmospheric solitary wave and associated cloud,
occasionally observed in different locations around the world. The wave often
occurs as an amplitude-ordered series of waves forming bands of roll clouds.
The southern part of the Gulf of Carpentaria in Northern
Australia is the only known location where it can be predicted and observed on
a more or less regular basis due to the configuration of land and sea in the
area.
Description
Morning Glory clouds can be observed from Burketown from
late September to early November. The town attracts glider pilots intent on
riding this phenomenon. There are generally only a handful of well formed
spectacular clouds during this period at Burketown. During the 2012 season
there were only four to be seen from there, but quite a few ragged
unspectacular cloud lines were seen. Often they start to break up before arriving
at Burketown or pass to the north and only stay well formed over water. In an
aircraft there is a significantly better chance of sighting the cloud.
A Morning Glory cloud is a roll cloud, or arcus cloud, that
can be up to 1,000 kilometres (620 mi) long, 1 to 2 kilometres (0.62 to 1.24
mi) high, often only 100 to 200 metres (330 to 660 ft) above the ground. The
cloud often travels at the rate of 10 to 20 metres per second. Sometimes there
is only one cloud, sometimes there are up to ten consecutive roll clouds. Three
distinct types of Morning Glory clouds have been identified.
The Morning Glory is often accompanied by sudden wind
squalls, intense low-level wind shear, a rapid increase in the vertical
displacement of air parcels, and a sharp pressure jump at the surface. Cloud is
continuously formed at the leading edge while being eroded at the trailing
edge. Showers or thunderstorms may develop in its wake. In the front of the
cloud, there is strong vertical motion that transports air up through the cloud
and creates the rolling appearance, while the air in the middle and rear of the
cloud becomes turbulent and sinks. The cloud quickly dissipates over land where
the air is drier.
The cloud can also be described as a solitary wave or a
soliton or an undular bore, which is a wave that has a single crest and moves
without changing speed or shape. As such, it is the world's biggest wave. The
wave may occur without the appearance of any clouds.
History of exploration
Unusual cloud formations have been noticed here since
ancient times. The local Garrawa Aboriginal people called it kangólgi. Royal
Australian Air Force pilots first reported this phenomenon in 1942.
The Morning Glory cloud of the Gulf of Carpentaria has been
studied by multiple teams of scientists since the early 1970s. The first
studies were published by Reg H.Clarke (University of Melbourne). Multiple
studies have followed since then, proposing diverse mathematical models
explaining the complex movements of air masses in the region.
Causes
The Morning Glory cloud is not clearly understood because
their rarity means they have little significance in terms of rainfall or
climate. Regardless of the complexity behind the nature of this atmospheric
phenomenon, some conclusions have been made about its causes. Through research,
one of the main causes of most Morning Glory occurrences is the mesoscale
circulations associated with sea breezes that develop over the peninsula and
the gulf. On the large scale, Morning Glories are usually associated with frontal
systems crossing central Australia and high pressure in northern Australia.
Locals have noted that the Morning Glory is likely to occur when the humidity
in the area is high, which provides moisture for the cloud to form, and when
strong sea breezes have blown the preceding day.
Scenario for formation
The following is a summary of the conditions that cause the
Morning Glory cloud to form in the Gulf of Carpentaria (after hypothesis of
R.H.Clarke, as described in 1981). First, Cape York which is the peninsula that
lies to the east of the gulf, is large enough that sea breezes develop on both
sides. During the day, the breeze from the Coral Sea coast blows in from the
east and the breeze from the gulf blows in from the west. The two breezes meet
in the middle of the peninsula, forcing the air to rise there and form a line
of clouds over the spine of the peninsula. When night comes, the air cools and
descends and at the same time a surface inversion (where air temperature
increases with height) forms over the gulf. The densities in this stable layer
are different above and below the inversion. The air descending from the
peninsula to the east goes underneath the inversion layer and this generates a
series of waves or rolling cylinders which travel across the gulf. These
cylinders of air roll along the underside of the inversion layer, so that the
air rises at the front of the wave and sinks at the rear. In the early morning,
the air is saturated enough so that the rising air in the front produces a
cloud, which forms the leading edge of the cylinder, and evaporates in the
back, hence forming the Morning Glory cloud. The cloud lasts until the surface
inversion disappears with the heating of the day.
There are other ways in which Morning Glory clouds form,
especially in rarer cases in other parts of the world, but these are far less
understood.
Local weather lore in the area suggests that when the
fridges frost over and the café tables' corners curl upwards at the Burketown
Pub, there is enough moisture in the air for the clouds to form. Reportedly,
all winds cease at ground level as the cloud passes over.
Other reported occurrences
Although the Morning Glory clouds over the southern part of
Carpentaria Gulf are the most frequent and predictable, similar phenomena have
occasionally been observed elsewhere, e.g., over central United States, the
English Channel, Munich, Berlin, eastern Russia, and other maritime regions of
Australia. There was a one distinct and well formed roll cloud observed
spanning from horizon to horizon (east to west), just prior to midnight on
October 22nd/2015, at 50.3044°N, 96.9692°W (about 35 km North of Winnipeg,
Manitoba, Canada), followed up by a series of them (but much less distinctive)
shortly after midnight on October 24th/2015. Considering the rarity of the
event in this region, it is seen as a once in a lifetime occurrence.
Morning Glory clouds have occasionally been reported on Cape
Cod and in the Gulf of California off the Mexican coast. The phenomenon has
also been observed from Sable Island, 180 km southeast of Nova Scotia. A
Morning Glory also passed through Yarmouth, Nova Scotia in April 2009. In
contrast to the Gulf of Carpentaria where the Morning Glory is visible in the
morning, those in Nova Scotia have all occurred during the evening. Rare
examples have been observed via satellite observation over the Joseph Bonaparte
Gulf in the Eastern Kimberley region of Australia as well as over the Arabian
Sea. A Morning Glory cloud was observed in 2007 over the Campos dos Goytacazes
bay in the state of Rio de Janeiro, Brazil. In August 2011, it happened again
over Peregrino Field in South Campos Basin in Brazil. The phenomenon was also
recorded on Batroun's shore (Lebanon – Middle East) in September 2004. On 20
November 2013, a Morning Glory formation formed over the greater Durban area.
On 4 June 2015 a Morning Glory Cloud formed over St. Cloud, FL, USA.
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| morning glory cloud |
Yeah, its a little bit confusing for us, especially for me,
because im not that smart :”(
How great is our world!
So maybe that’s all for me today, thanks for reading my blog
and so goodbyeee!
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