IDENTIFICATION OF THE SEASONAL ATMOSPHERIC BOUNDARY LAYER HEIGHT USING GLOBAL NAVIGATION SATELLITE SYSTEM RADIO OCCULTATION DATA
The atmospheric boundary layer (ABL) is the lowest layer of Troposphere whose physical and dynamic properties are affected directly by Earth surface condition. The parameter is applied to describe the ABL characteristics, specifically ABL height, which is identified by using refractivity profile fro...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/61763 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The atmospheric boundary layer (ABL) is the lowest layer of Troposphere whose physical and dynamic properties are affected directly by Earth surface condition. The parameter is applied to describe the ABL characteristics, specifically ABL height, which is identified by using refractivity profile from observation of Constellation Observing System for Meteorology, Ionosphere, and Climate Mission-2 (COSMIC-2) GNSS-RO. In Indonesia pattern of ABL height in every season is allegedly affected by the pattern of rainfall in an area. This study aims to identify the ABL height seasonally and analyze the correlation between the ABL height and the rainfall.
The study area is Java in west region (6° S- 8°S, 105°E-110°E) dan The Kalimantan in west region (2° N- 1°S, 109° E-114°E) with study period on 1 January 2020 up to 28 February 2021. The ABL height is estimated based on the method of minimum or maximum refractivity variable gradient.
The result of ABL height identification seasonally is the strongest during the SON season in west region of Java and the MAM season in west region of Kalimantan. The result is obtained from the diurnal analysis of ABL height pattern seasonally and monthly based on the highest median value. The ABL height seasonally in west region of Java, which is the most suitable for weather condition, is the SON season whereas in west region of Kalimantan is the MAM season. The ABL height during the seasons have the opposite correlation to the rainfall. In sunny weather condition, the ABL height is higher than in rainy weather condition.
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