Ozon: Peran dan Dampaknya Terhadap Kelangsungan Kehidupan di Bumi  

Oleh:

Juniarti

Jenis: Article from Journal - ilmiah nasional - tidak terakreditasi DIKTI
Dalam koleksi: Widya: Majalah Ilmiah vol. 24 no. 264 (Sep. 2007), page 2-7.
Topik: Ozon; Penipisan Lapisan Ozon

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: MM47.26 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada	Lihat Detail Induk
Perpustakaan PKPM Nomor Panggil: W36 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada	Lihat Detail Induk

Isi artikel

Solar ultraviolet radiation creates an ozone layer in the atmosphere which in turn completely absorbs the most energetic fraction of this radiation.This process both warms the air,creating the stratosphere between 15 and 50 altitude, and protecs the biological activities at the earth's surface from this damaging radiation.The growing emissions of synthetic chlorofuorocarbon molecules cause a significant diminution in the ozone content of the stratosphere, with the result that more solar ultraviolet-B radiation (290-320 nm wavelegth) reaches the surface.this azone loss occurs in the temprate zone latitudes in all seasons, and especially drastically since the early 1980's in the south polar spring time-the' Antartic ozone hole '.The cemical reactions causing this ozone depletion are primarily based on atomic CI and CIO, the product of its reaction with ozone. the further manufacture of chlorofluorocarbons has been banned by the 1992 revisions of the 1987 Monteral Protocol of the United Nations. Atmospheric measurements have confirmed that the protocol has ben very succesful in reducing further emissions of these molecules.Recovery of the stratosphere to the ozone conditions of the 1950's will occur slowly over the rest of the twenty first century because of the lona lifetime of the precursor molecules.

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