Question

The modern self recording instrument which records the quantity and the duration of the rainfall on the graph paper is called as ____________
A. Rain gauge
B. Barometer
C. Rain graph
D. Pluviograph

Answer 1

Hint: In 400 BCE, people living in India started to record rainfall . Each of the state storehouses was equipped with this device to classify land for tax purposes. The amounts represented by this device are read manually or by an automated weather station (AWS).

Complete answer:
In general, most modern rain gauges calculate the rainfall in millimetres in height obtained over a certain period of time on each square metre, equal to litres per square metre.

A. Rain gauge :A rain gauge (also referred to as an udometer, pluviometer, or ombrometer) is a method used by meteorologists and hydrologists in a predefined period of time to collect and measure the amount of liquid precipitation over a region.

In an open area where there are no houses, trees, or other barriers to obstruct the rain, rain gauges should be installed. It is also to stop the water accumulated after a rain from dripping into the rain gauge on the roofs of buildings or the leaves of trees, resulting in incorrect readings.

B. Barometer :A barometer is a scientific instrument which is used in a certain setting to measure air pressure. The pattern of pressure will predict short-term changes in the weather. In surface weather research, several measures of air pressure are used to help locate surface troughs, pressure systems and frontal boundaries.

C. Rain graph :For a given region, a climate graph shows yearly temperature and precipitation statistics. Precipitation (mm) is measured using the numbers on the chart's right side. The average rainfall is plotted on a graph with a blue bar for each month.

D. Pluviograph :Pluviograph (plural pluviographs) An instrument for calculating the amount of water that has dropped (i.e. a rain gauge) with a real-time data recording feature to show short-term rainfall, also an automatic graphing tool.

Thus the correct answer is option (A)


Note:
1) The gauges of rain have their limits. It can be almost difficult and ineffective (even if the equipment survives) to attempt to collect rain data in a tropical cyclone because of wind extremes. In a localised region, rain gauges often only show rainfall.

2) Another question is when the temperature is near or below zero. Rain will fall on the funnel, and the gauge can accumulate ice or snow, preventing subsequent rain.

3) A gauge may be fitted with an automatic electric heater to preserve its moisture-collecting surfaces and sensors slightly above freezing to mitigate this.