Tipe-tipe Awan (Cloud Types)

Kemalangan yang menimpa pesawat Air Asia QZ8501 menjelang akhir tahun 2014 sungguh membawa kesedihan bagi keluarga korban secara khusus dan kita semua sebagai satu bangsa dan juga dunia penerbangan.

Meskipun transportasi udara merupakan salah satu transportasi teraman di dunia dengan tingkat kecelakaan 1 : 1,2 juta, tetapi efek dari kecelakaan sebuah pesawat tetap merupakan sebuah tragedi yang selalu menyita perhatian banyak pihak ketika itu terjadi. Kita semua berharap di masa mendatang dunia penerbangan akan semakin maju dan semakin meminimalkan kemungkinan terjadinya kecelakaan.Dengan komitmen dan perbaikan terus menerus, kita berharap bahwa dunia penerbangan tidak akan lagi memakan korban sebagaimana yang sudah terjadi.

Kita juga berharap dan turut mendoakan agar keluarga korban bisa menghadapi kejadian ini dengan tabah dan tetap kuat menghadapi kehidupan yang harus mereka tempuh di hari-hari berikutnya.

Seperti ramai dibicarakan di media massa bahwa salah satu penyebab kemalangan yang menimpa Air Asia QZ8501 adalah usaha pesawat untuk menghindari jenis awan yang cukup berbahaya yaitu awan Cumulonimbus. Dan sebagai pembelajar Bahasa Inggris ada baiknya BBIM Friends juga mengetahui tentang jenis awan ini dan berbagai jenis awan yang terdapat di atmosfir bumi kita. Dan berikut adalah data jenis-jenis awan tersebut :


Gambar di atas adalah Diagram awan yang menunjukkan jenis serta ketinggian masing  masing jenis awan serta ketinggiannya. (Sumber gambar : eo.ucar.edu)

Keterangan : 

1. Low Clouds
  • Stratus Clouds : Stratus clouds are uniform grayish clouds that often cover the entire sky. They resemble fog that does not reach the ground. Usually no precipitation falls from stratus clouds, but sometimes they may drizzle. When a thick fog "lifts," the resulting clouds are low stratus.

Stratus Clouds

  • Nimbostratus clouds  :form a dark gray, "wet" looking cloudy layer associated with continuously falling rain or snow. They often produce precipitation that is usually light to moderate.


Nimbostratus Clouds

2. Middle Clouds : between 2000 and 7000 m (6500 to 23,000 ft.)
  • Altocumulus clouds : are middle level clouds that are made of water droplets and appear as gray, puffy masses, sometimes rolled out in parallel waves or bands. The appearance of these clouds on a warm, humid summer morning often means thunderstorms may occur by late afternoon.

  • Altostratus clouds : are gray or blue-gray middle level clouds composed of ice crystals and water droplets. These clouds usually cover the entire sky. In the thinner areas of the cloud, the sun may be dimly visible as a round disk. Altostratus clouds often form ahead of storms that will produce continuous precipitation.


3. High Clouds
  • Cirrus clouds : are thin, wispy clouds blown by high winds into long streamers. They are considered "high clouds" forming above 6000 m (20,000 ft). Cirrus clouds usually move across the sky from west to east. They generally mean fair to pleasant weather.

  • Cirrostratus clouds :are thin, sheetlike high clouds that often cover the entire sky. They are so thin that the sun and moon can be seen through them.

  • Cirrocumulus clouds : appear as small, rounded white puffs. The small ripples in the cirrocumulus sometimes resemble the scales of a fish. A sky with cirrocumulus clouds is sometimes referred to as a "mackerel sky."

3.Cloud With Vertical Development
  • Cumulus clouds : are puffy clouds that sometimes look like pieces of floating cotton. The base of each cloud is often flat and may be only 1000 meters (3300 feet) above the ground. The top of the cloud has rounded towers. When the top of the cumulus resembles the head of a cauliflower, it is called cumulus congestus or towering cumulus. These clouds grow upward, and they can develop into a giant cumulonimbus, which is a thunderstorm cloud.

  • Cumulonimbus clouds : are thunderstorm clouds that form if cumulus congestus clouds continue to grow vertically. Their dark bases may be no more than 300 m (1000 ft) above the Earth's surface. Their tops may extend upward to over 12,000 m (39,000 ft). Tremendous amounts of energy are released by the condensation of water vapor within a cumulonimbus. Lightning, thunder, and even violent tornadoes are associated with the cumulonimbus.

Cumulonimbus




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