Observation of Temperature Profiles of Kototabang (Bukittinggi-West Sumatera Indonesia) Using Radiosonde and Rain Event Identification

Humanosphere Science School 2017; 7th International Symposium for a Sustainable Humanosphere

地球科学;经济学

Juaeni, I.^1 ; Nugroho, G.A.^1 ; Rahayu, S.A.^1 ; Safrijon^2 ; Halimurrahman^1

Center of Atmospheric Science and Technology Indonesian, National Institute of Aeronautics and Space (LAPAN), Jln. Dr. Djundjunan No. 133, Bandung

40173, Indonesia^1

Atmosphere and Space Observation Station Agam District, National Institute of Aeronautics and Space (LAPAN), Kototabang, West Sumatera, Indonesia^2

关键词: Convective available potential energies;    Kyoto University , Japan;    Radio acoustic sounding systems;    Radiosonde measurements;    Research cooperation;    Research institutes;    Temperature profiles;    Thermodynamic diagrams;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/166/1/012032/pdf
DOI  :  10.1088/1755-1315/166/1/012032

来源: IOP

【 摘 要 】

We recorded temperature profiles of Kototabang (West Sumatera-Indonesia) in a four days observation using Radio Acoustic Sounding System (RASS) and Radiosonde. The activity was carried out in August 2016, on a research cooperation framework of National Institute of Aeronautics and Space (LAPAN), Indonesia and Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Japan. The current article discussed the temperature profile based on 12 times launch of Radiosonde, Convective Available Potential Energy (CAPE) estimation and its relationship with rain events, while the temperature profile based on RASS was discussed in another report. CAPE is the amount of energy an air parcel would have if lifted to a certain distance vertically through the atmosphere. CAPE is effectively the positive buoyancy of an air parcel and is an indicator of atmospheric instability, related to convection clouds. If there is not enough water vapour present, there is no ability for condensation, and therefore, storms, clouds, and rain will not form. CAPE is calculated as the area of positive region in the thermodynamic diagram or through relationships with virtual temperature. On August 30, 2016, at 08 LT, the range of temperatures based on Radiosonde measurements was recorded from 294.9°K at ground level to 186.5°K at an altitude of 26.8 km. The temperature range varied with time. CAPE based on Radiosonde data ranged from 0 to 5075.2 Jkg-1 within 30 August 2016 until 2 September 2016. The maximum CAPE value occurred on August 30, 2016 at 15.34 LT. Large CAPE (> 2000 Jkg-1) was coincident with rain events.