Judul: The Characteristic of Atmospheric Boundary Layer in West Sumatera (Case Study: Forest and Land Fires on 2015, 2016, and 2019)
Abstrak: Kebakaran hutan dan lahan sering terjadi di Indonesia sepanjang tahun 2015 hingga 2021. Saat kebakaran hutan dan lahan, suhu permukaan dan udara akan meningkat sehingga memengaruhi karakteristik Lapisan Batas Atmosfer (LBA) atau disebut dengan Planetary Boundary Layer (PBL). Penelitian bertujuan untuk menganalisis dan membandingkan karakteristik ABL saat kebakaran hutan pada September 2015, 2016, dan 2019. Penelitian menggunakan data Radiosonde Bandara Internasional Minangkabau yang bersumber dari data NOAA dengan. semua data radiosonde diolah menjadi profil vertikal suhu potensial virtual, kelembapan spesifik, kecepatan angin, dan Bulk-Richardson -number. penentuan ketinggian Mixed Layer adalah saat nilai suhu potensial virtual mengalami peningkatan tajam dan pengestimasian nilai Turbulent Flow Thickness dengan melihat nilai RiB yang dihasilkan kurang dari nilai Critical Richardson Number (RiC). Ketinggian Mixed Layer tertinggi berada pada tahun 2015 yaitu mencapai ketinggian 3.779 m dengan selisih 2.206 m dengan ketinggian mixed layer saat kondisi normal sehingga kebakaran hutan dan lahan memengaruhi ketebalan Atmospheric Boundary Layer., Forest and land fires often occur in Indonesia from 2015 to 2021. During forest and land fires, surface and air temperatures will increase, affecting the characteristics of the Atmospheric Boundary Layer (ABL) or with other name of Planetary Boundary Layer (PBL). Study aims to analyze and compare the characteristics of ABL during forest fires in September 2015, 2016, and 2019. This study uses Minangkabau International Airport Radiosonde data sourced from NOAA data. All radiosonde data is processed into a vertical profile of virtual potential temperature, specific humidity, wind speed, and Bulk-Richardson number. The determination of the height of the Mixed Layer is when the virtual potential temperature value has a sharp increase and the estimation of the Turbulent Flow Thickness value by looking at the resulting RiB value is less than the Critical Richardson Number (Ric) value. The highest mixed layer height was in 2015 which reached a height of 3.779 m with a difference of 2.206 m from the mixed layer height under normal conditions. So, forest and land fires affected Atmospheric Boundary Layer’s Thickness
Keyword: Bulk-Richardon number, Mixed Layer, NOAA, Radiosonde, Turbulent Flow Thickness

Judul: Dinamika Lapisan Perbatas pada Dua Wilayah dengan Karakter Berbeda (Studi Kasus: Bandara Soekarno Hatta dan Situ Gede Dramaga Bogor)
Abstrak: Atmospheric boundary layer (ABL) was the layer which affected by the surface's layer underneath. Different characteristics on the surface will affect the dynamics in boundary layer. This study aims to determine the height of ABL which was influenced by differences of surface characteristics at different times and places. This study conducted in two different surface characteristics of area, these are Bandara Soekarno Hatta as urban area and Situ Gede Dramaga Bogor as agricultural area. Meteorological parameters data from radiosonde were analyzed with the approachment from vertical profiles of temperature, humidity, and wind speed also atmospheric stability condition. The average height of ABL in Bandara Soekarno Hatta was higher than Situ Gede Dramaga Bogor, and that was because the differences of surface characteristics, moisture content and temperature between air. Atmospheric conditions at both areas tend to be stable in the morning and evening then unstable during the day. Based on the pattern of vertical profiles ABL parameter, the value of the temperature near the surface was greater at Bandara Soekarno Hatta compared to Situ Gede Dramaga Bogor and inversely proportional to the value of the humidity. Fluctuation for temperature and moisture in each areas had consistency meanwhile the wind speed in both areas had fluctuated. That shows the moisture content and the difference of surface characteristics affect the value of the temperature, humidity, and wind speed.
Keyword: atmospheric boundary layer, humidity, surface characteristics, temperature, wind speed

Judul: Trichomonas Gallinae Penyebab Trichomonosis Pada Unggas
Abstrak: Trichomonas gallinae adalah protozoa yang bergerak aktof dengan keempat flagella yang mempunyai layar dan pada salah satu sisinya terdapat membran seperti sirip ikan yang berombak. Spesies dari genus Trichomonas ini mempunyai arti penting pada unggas, karena dapat menyebabkan infeksi pada alat pencernaan bagian atas.
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