Perubahan iklim kurangi kadar oksigen di sungai-sungai dunia

Sungai-sungai di seluruh dunia secara bertahap kehilangan oksigen terlarut, dengan perubahan iklim yang diidentifikasi sebagai pemicu utama dalam sebuah studi komprehensif baru. Hampir 80 persen sistem sungai yang dianalisis menunjukkan penurunan selama empat dekade, dengan wilayah tropis yang paling terdampak.

Para peneliti memeriksa observasi dari 21.439 titik sungai yang dikumpulkan antara tahun 1985 hingga 2023. Mereka menyimpulkan bahwa kadar oksigen turun dengan rata-rata 0,045 miligram per liter per dekade, di mana 78,8 persen sungai terdampak oleh deoksigenasi. Studi ini dipimpin oleh Prof. Kun Shi dari Nanjing Institute of Geography and Limnology di Chinese Academy of Sciences, dengan Dr. Qi Guan sebagai penulis pertama serta masukan dari Tongji University.

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