NASA follows monsoon rains behind flooding in Kerala

NASA has released a video using satellite data that provides an estimate of the intense rainfall over India in the past week and shows the spread of the resulting severe flooding in Kerala and parts of Karnataka.

The summer monsoon is this time of year a regular part in India and it can bring heavy rain showers to the region. In the general monsoon dry, areas with low pressure can periodically form and even cause even more rain.

Kerala faces the worst floods in nearly a century that killed at least 231 people and drove 3.14 people out of their homes. The Center has this catastrophe of seriousness & # 39; explained.

Rainfall from 13 to 20 August showed two bands of heavy rain in India, NASA said in a statement.

The first band seemed much broader and stretched over the northern part of the peninsula with weekly rainfall totals ranging from more than 5 inches to the western half of the peninsula up to 14 inches across parts of the eastern half towards the Bay of Bengal.

The first band is associated with the general monsoon circulation. The second band seemed more concentrated and intense and is closely aligned with the southwest coast of India and the Western Ghats, where the power on land was reinforced by a low pressure area embedded in the general monsoon.

The weekly rainfall totals in this band are generally more than 10 inches with enclosed areas of more than 16 inches. The maximum estimated value of the data in this band was 18.5 inches, according to NASA.

Although the extreme Himalayan topography is much better known, the Western Ghats is another factor that contributes to heavy rainfall along the southwest coast of India.

Although much smaller than the Himalayas, this mountain range runs parallel to the west coast of India with many peaks of over 2000 meters.

As a result, the Western Ghats are well positioned to promote rainfall along the west coast of India, as they intercept the humid air that is absorbed by the warm waters of the northern Indian Ocean and the Arabian Sea as part of the southwestern monsoon circulation.

The Integrated Multi-Satellite Retrievals for GPM (IMERG) is used to estimate precipitation from a combination of passive microwave sensors, including microwave sensor and infrared data.

The data is generated every half an hour, allowing scientists to follow rain almost anywhere in the world in real time. GPM is the satellite for satellite missions with global rainfall measurement. GPM is a joint mission between NASA and the Japan Aerospace Agency, JAXA.

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