arihant current affairs magazine monthly
arihant current affairs magazine monthly Published this article page no 07 AUSTRALIAN BUSH FIRE Why in News? Recently Australia is facing worst wildfires seen in decades that led to a huge humanitarian and environmental crisis. More in News In total more than 7.3 million hectares (17.9 million acres) have been burned across Australia. Total area under fire is almost 7 times greater than the 2019 Amazon fires and three times than California fires. 62 Concept of Bushfires Forest fires or bushfires routinely occur across the world in hot and dry seasons. Dry leaves grass shrubs deadwood etc are easily combustible. Ignition happens naturally from lightning strikes for example or accidentally from human induced sources such as arson etc. Suitable speed and direction of wind helps spread a forest fire faster. It usually comes to an end due to rain or because there is no further contiguous vegetation to spread to. In Indian Context During the summer months fires are common in the forests of India as well. Indian Ocean Dipole (IOD) The IOD refers to the difference in seasurface temperatures in the eastern and western Indian Ocean. This either aids or cuts off moisture supply to Australia depending on whether the western Indian Ocean is cooler or the eastern. This year the eastern Indian Ocean has been unusually cold (i.e. positive IOD) and that contributed to the rainfall deficiency over Australia. Cause The start of the fires has been attributed to natural causes like lightening or human induced like arson. But climate change is the reason why these fires have become so deadly arihant current affairs magazine monthly buy.
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