Increasing smog haze and its impact on oil palm evapotranspiration and gross primary production during the 2015 fire: special discussion on diffuse radiation
| Main Authors: | Aulia, Felia Rizky, June, Tania, Koesmaryono, Yonny |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Graduate School Bogor Agricultural University (SPs IPB)
, 2022
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| Subjects: | |
| Online Access: |
http://journal.ipb.ac.id/index.php/jpsl/article/view/40214 http://journal.ipb.ac.id/index.php/jpsl/article/view/40214/24088 |
Daftar Isi:
- Tahun 2015, beberapa wilayah di Indonesia mengalami kekeringan yang bertepatan dengan munculnya fenomena El Nino. Kekeringan di Indonesia diikuti oleh kebakaran hutan mengakibatkan perkebunan kelapa sawit di Jambi tertutup oleh kabut asap. Fenomena kebakaran hutan berdampak besar pada pelemahan radiasi matahari yang masuk ke permukaan bumi akibat tertutupnya atmosfer oleh kabut asap yang cukup tebal sehingga berpengaruh terhadap produksi primer dan evapotranspirasi kelapa sawit. Penelitian ini bertujuan menganalisis intensitas kabut asap berdasarkan radiasi hambur dan menganalisis hubungan serta pola GPP dan evapotranspirasi terhadap radiasi hambur pada saat terjadi kabut asap di tahun 2015. Konsentrasi PM10 sebagai representase aerosol di atmosfer terhadap transmisivitas atmosfer berkorelasi negatif dengan r = -0,8 dan p-value = 0,0016. Tingginya radiasi hambur berbanding lurus dengan kondisi atmosfer yang tertutup oleh kabut asap. Saat tutupan kabut asap di atmosfer sedang mencapai puncaknya di bulan Oktober 2015, sebagian besar radiasi matahari yang masuk adalah radiasi hambur. Fraksi difus dengan GPP dan evapotranspirasi juga berkorelasi negatif atau berbanding terbalik. Keduanya memiliki hubungan yang signifikan dengan p-value < 0,05 dan r = -0,93 untuk GPP dan r = -0,88 untuk evapotranspirasi. Berdasarkan besarnya koefisien korelasi, radiasi difus dengan GPP memiliki hubungan yang lebih erat dibandingkan dengan evapotranspirasi.
- In 2015, several regions in Indonesia experienced drought which coincided with the El Nino phenomenon. A drought in Indonesia followed by fires has resulted in oil palm plantations in Jambi being covered by smog. The fire phenomenon has a major impact on the weakening of the sun that enters the earth's surface due to the closure of the atmosphere by thick smog so that it affects gross primary production (GPP) and evapotranspiration of oil palm. This study aims to analyze the intensity of smog based on diffuse radiation and analyze the relationship and pattern of GPP and evapotranspiration to diffuse radiation during the occurrence of smog in 2015. PM10 concentration as a representation of aerosols in the atmosphere on atmospheric transmissivity is negatively correlated with r = -0.8 and p-value = 0.0016. The high diffuse radiation is directly proportional to the atmospheric conditions covered by smog. When the smog cover in the atmosphere was at its peak in October 2015, most of the incoming solar radiation was diffuse radiation. The diffuse fraction with GPP and evapotranspiration was also negatively or inversely correlated. Both have a significant relationship with p-value < 0.05 and r = -0.93 for GPP and r = -0.88 for evapotranspiration. Based on the magnitude of the correlation coefficient, diffuse radiation with GPP has a closer relationship than evapotranspiration.