Clouds 101: Cloud Streets / Cumulus radiatus (Cu ra)

11/20/2012


Genera: Cumulus - detached clouds, generally dense and with sharp outlines, developing vertically in the form of rising mounds, domes or towers, of which the bulging upper part often resembles cauliflower. The sunlit parts of these clouds are mostly brilliant white; their base is relatively dark and nearly horizontal.

Rod: Cumulus - zaseban tip oblaka, uopsteno je gust sa ostrim obrisima, razvija se vertikalno u obliku rastucih nasipa, kupola ili tornjeva, ciji je rastuci gornji dio cesto slican karfiolu. Da, povrcu. Suncem osvijetljeni dijelovi ovih oblaka su cesto zaslijepljujuce bijele boje, baza im je relativno tamna i skoro pa horizontalna.  

Varieties: Radiatus - from the Latin radiatus, derived from the verb radiare which expresses the idea of having rays, being radiant. In this case, cumulus clouds (usually of moderate vertical development) that are arranged in files nearly parallel to the wind direction. This formation is known as horizontal convective rolls, horizontal roll vortices or simply cloud streets. Although horizontal convective rolls, also known as cloud streets, have been clearly seen in satellite photographs for the last thirty years, their development is poorly understood due to a lack of observational data. Usually cloud streets have a well defined start point often following coast lines, but the end points tend to tail off as the air moves away from the source of convection. Cloud streets may from over seas as relatively cool air streams over relatively warm water, or they may be form over land as relatively unstable air streams over an obstacle and convection is caused by friction or shear.

Podvrsta: Radiatus - od latinske rijeci radiatus koja je izvedena od glagola radiare koji izrazava ideju da nesto isijava, ima zrake, jeste isijavajuce. U ovom slucaju, kumulusni oblaci (najcesce umjerenog razvoja) koji su rasporedjeni u redove/kolone skoro pa paralelne smjeru vjetra. Ova formacija je poznata kao horizontalni konvektivni klipovi, horizontalni valjkasti virovi ili jednostavno, ulice oblaka. Iako ovi horizontalni konvektivni valjci, takodjer poznati kao ulice oblaka, se jasno mogu vidjeti na satelitskim slikama vec zadnjih trideset godina, o njihovom razvoju se jako malo zna zbog manjka opservacijskih podataka. Ulice oblaka najcesce imaju jasno definisanu pocetnu tacku i cesto prate obalne linije ali im se krajnje tacke razidju, nestanu kako se zrak odmice od izvora konvekcije. Ulice oblaka se mogu formirati iznad mora kao relativno hladne zracne struje iznad relativno tople vodene povrsine. Takodjer se mogu formirati iznad kopna kao relativno nestabilne zracne struje iznad prepreke i konvekcija je izazvana trenjem.



Definition of a cloud:   
A cloud is a visible aggregate of minute particles of water or ice, or of both, in the free air. This aggregate may include larger particles of water or ice and particles, such as those present in fumes, smoke or dust.

Definicija oblaka: Oblak je vidljivo agregatno stanje zasicenih cestica vode, leda ili vode i leda, koje se nalaze slobodne u zraku. Mogu biti u pitanju i krupnije cestice vode i leda i cestice poput onih koje su prisutne u dimu, isparenjima ili prasini.

Appearance of clouds:
The appearance of a cloud is determined by the nature, sizes, number and distribution in space of its constituent particles. Appearance is best described in terms of dimensions, shape, structure, texture, luminance and colour of the cloud.

Pojava oblaka tj. njihov izgled je odredjen karakterom, velicinama, kolicinom i raspodjelom cestica koje ga sacinjavaju kroz prostor. Izgled oblaka je najbolje opisan u kroz dimenzije, oblik, strukturu, teksturu, osvjetljenost i boju oblaka.

Classification of clouds:
A classification of the charcteristic forms of clouds, in terms of "genera", "species" and "varieties" has been established by the WMO( World Meteorological Organisation).



Klasifikacija karakteristicnih oblika oblaka u smislu "rodova", "vrsta" i "podvrsta" je ostvarena od strane WMO (World Meteorological Organisation) tj. Svjetske Meteoroloske Organizacije.

(I) Genera  
The classification is essentially based on 10 main groups, called genera, which are mutually exclusive, that is to say, a given cloud can belong to one genus only. The genera are;

Podjela na rodove je ustvari podjela na 10 osnovnih grupa zvanih rodovi koji su medjusobno posebni, sto znaci da odredjeni oblak moze da pripada samo jednom rodu. Podjela na rodove je slijedeca:

  1. Cirrus - Ci
  2. Cirrocumulus - Cc
  3. Cirrostratus - Cs
  4. Altocumulus -Ac
  5. Altostratus -As
  6. Nimbostratus -Ns
  7. Stratocumulus - Sc
  8. Stratus - St
  9. Cumulus - Cu
  10. Cumulonimbus - Cb

(II) Species
Obseved peculiarities in the shape of clouds and differences in their internal structure have led to the subdivision of most of the cloud genera into species.

Osmotrene pojedinosti u obliku oblaka i njihovih razlika u unutarnjoj strukturi su doveli do podjele vecine rodova oblaka na vrste.

(III) Varieties
Clouds may exhibit special characteristics which determine their variety. These characteristics are related to the different arrangements of the could elements.

Oblaci mogu iskazati posebne karakteristike koje ce da odrede njihove podvrste. Te karakteristike su u vezi sa razlicitim rasporedom elementa oblaka.

(IV) Supplementary cloud features 
Dopunske odlike i oblaci pratioci:


1. incus - inc
2. mamma - mam
3. virga - vir
4. praecipitatio - pra
5. arcus - arc
6. tuba - tub
7. pileus - pil
8. velum - vel
9. pannus - pan

You Might Also Like

0 comments

Bloglovin

Follow

Facebook

Subscribe