Essay on Clouds from NEB in 700 words

                    

                  Clouds(700 words)

     

                Clouds are generally stunning. We don't pay enough attention to them. People may think they are beautiful if we have to pay to see them or if we can only see them once a year. But when we see something all the time, we stop seeing it. We dismiss it as common and move on.

But if we look at the sky, we can see that not all clouds are the same; there are different types of clouds, and we can see how beautiful they can be at times. A still white cloud in a dark sky at night with the moonlight on it, white feathery fine clouds high up in a deep blue sky at noon lit up by the sunlight, bright red clouds at yellow, and grey, that make the western sky ablaze with color, at sunset, dark black rain clouds that sweep up from the south on the monsoon window, all these are beautiful and grand!

Clouds are useful to us because they produce rain. Our world would be a dry and barren desert if it did not receive rain. There would be no rivers or streams, and all plants would perish due to a lack of food.

What exactly are clouds, and how do they produce rain? When we go outside on a cold day, we can see our breath coming out of our mouths like mist or frost. The reason for this is that our breath is both warm and full of moisture from our bodies.

Though we cannot see it, warm air can hold a lot of water in the form of vapour, whereas cold air cannot. So, when our warm breath escapes into the cold air, it is chilled, and because it can no longer hold all of the vapour, some of it "condenses," or turns back into tiny drops of water, which we see as mist.

If the climate changes, clouds will change, affecting all of the effects listed above. What matters is the net radiative cooling or warming effect of all clouds on Earth, which is the sum of all these individual effects.

For example, if the Earth's climate warms due to the greenhouse effect, weather patterns and associated clouds will change; however, it is unknown whether the resulting cloud changes will reduce warming (a negative feedback) or increase warming (a positive feedback) (a positive feedback).

Furthermore, it is unknown whether these cloud changes will result in increased or decreased precipitation and water supplies in specific regions. Improving our understanding of clouds' role in climate is critical to comprehending the effects of global warming.

Over many decades, atmospheric scientists have learned a great deal about how clouds form and move in Earth's atmospheric circulation. Traditional global climate computer models have taken a rather simplistic view of clouds and their effects, partly because detailed global descriptions of clouds have been lacking, and partly because the focus has previously been on short-term regional weather prediction rather than long-term global climate prediction.

To address today's concerns, we must collect and analyze more and better data in order to better understand cloud processes and improve the accuracy of our weather and climate models. Dr. William B. Rossows is leading a major effort at NASA's Goddard Institute for Space Studies (GISS) to collect more information about clouds and their radiative effects.

The International Satellite Cloud Climatology Project (ISCCP), which is part of the World Climate Research Program (WCRP), has been collecting weather satellite observations since 1983 in order to compile a global, multi-year dataset. In collaboration with institutions in several other countries, GISS serves as the Global Processing Centre for ISCCP. The datasets contain some of the key variables that influence the interaction of cloud.

There are now several global cloud datasets and datasets from special field experiments available. A thorough examination of all of these data sets will take many years and, of course, will result in new experiments; however, the investigations have already provided new insights into how clouds may change with climate as well as statistics about the global distribution and character of clouds.

GISS collects data and develops models in parallel, with the goal of developing a more precise understanding of how sensitive the climate is to external forces and what those changes look like regionally. If we can fully comprehend these processes, we may be able to forecast the climate of the near future with sufficient accuracy to be useful for societal planning.