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a monsoon is a

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it is classified in terms of a

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prevailing strong winds

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that reverse distinctly as the season

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and also

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it is described by a very distinct wet

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and dry season

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the rainfall that fall within that wet

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season should should be more than 60

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of the entire year

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the fundamental drive for the monsoon

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both in india and other parts of the

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world is that there's a large area of

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land which gets warm compared to their

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surrounding ocean and that surrounding

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ocean provides the moisture which is

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then driving the precipitation that

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constitutes what we think of as monsoon

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if you simply look at asian monsoon you

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can estimate and various estimate more

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than 60 percent of the world population

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live in right in that area

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and the monsoon the water provided fresh

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water supply for this population not

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just for the daily life for agriculture

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for the for the industry and so the

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entire region the people's livelihood

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depend on the very delicate balance of

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the water balance in that region

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gpm gives us a chance to look at

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precipitation around the world and so in

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addition to the hurricanes and typhoons

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we're also looking at the monsoons

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because those storm systems are very

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important for driving floods

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and

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the advancements in gpm will allow us to

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do a better job of providing

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precipitation information so they can

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make better forecasts of the floods

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monsoon is not just simply a local

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problem a curiosity it actually has a

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huge amount of societal

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impact in terms of how it changes in

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that region the economy in that region

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can affect the entire world as well as

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many many things that happen in that

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region

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gpm has the most advanced duo frequency

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radar that actually measures the

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vertical structure of the ring for

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itself and that's very important

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the dpr gives us an unprecedented

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capability of teasing out relative sizes

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of particles and this is really

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important for understanding how the

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microphysics the the rain process works

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and the snow process and also how those

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can then be represented in numerical

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models that are critical for forecasting

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future events to study the monsoon one

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thing we didn't know is to note what we

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call the predictability in the monsoon

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how well can we predict the monsoon at

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that time and in order to do the

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prediction we need to have to know the

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variability very well this ranges from

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daily to weekly seasonal and then to

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what we call decadal variability the

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monsoon was first named in india

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but it turns out that the same driving

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force happens in other parts of the

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world and so for example in the northern

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hemisphere summer you have monsoon in

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west africa you have the monsoon in

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southwestern north america and then in

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our winter the southern hemisphere

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summer there's a monsoon that happens

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across northern australia

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the great thing about gpm is it allows

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you to see the orange systems as a whole

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you get to see them over the ocean and

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over the land you can see what the

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transitions are and so even before it

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gets to land where we have surface

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observations we can tell what's going to

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come in we can see what's been happening

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and of course scientifically that also

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allows us to understand the complete