Penggunaan Metode Aspect Sensitivity Dalam Penentuan Tinggi Lapisan Tropopause Di Saat Mjo Aktif Melintasi Kawasan Kototabang Dan Sekitarnya  

Oleh:

Hermawan, Eddy ; Nurlela, Irma ; Hadi, Tri Wahyu

Jenis: Article from Journal - ilmiah nasional
Dalam koleksi: Jurnal Sains Dirgantara vol. 5 no. 1 (Dec. 2007), page 58-70.
Topik: Aspect Sensitivity; CPT; LTR dan MJO

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: SS49.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

This paper is mainly concerned to the utilization of aspect sensitivity (Pv/Po) method to define the tropopause height variation over the equatorial Indonesia, nearby Kototabang (0,2 S; 100,32 E), Bukittinggi, West Sumatera using the Equatorial Atmosphere Radar (EAR), especially during the Coupling Processes Equatorial Atmosphere (CPEA) Campaign I in 2004 is already done. It is very important to be done since the tropopause is the buffer layer between troposphere and stratosphere (and also contrary) that usually called as the Stratosphere-Troposphere Exchanged (STE) (Holton, 1996). Validation's results with the radiosonde data shows that Pv/Po relatively higher than radiosonde data. They are about 712 meter and 961 meter for Cold Point Tropopause (CPT) and Lapse Rate Tropopause (LRT) version, respectively. The mean difference between CPT and LRT itself is about 248 meter. This is enough valid considering to the maximum difference between of them not more 500 meter (Haynes and Shepherd, 2001). This result then be applied in determining of tropopause height variation over Kototabang, especially when the Madden-Julian Oscillation (MJO) passed over this region from November to December 2001. It shown that there are no significant differences between MJO active and non active on the tropopause height determination about 17.98 km and 17.73 km, respectively. The most interest is the tropopause height variation is larger during the MJO active than non active. We suspect it caused by the turbulence activity nearby the tropopause height variation, especially with good time and spatial height resolution, the utilization of EAR and other instruments at Kototabang are very needed.

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