Studies documenting the arrival of spring and fall in the northern hemisphere are based on

Spring - When buds of particular plants open

Fall - When the leaves of particular change color and fall.

Explanation:

The arrival of the spring and fall in the Northern hemisphere is base on nature, especially through trees. During fall, trees start to change its leaves colors become visible and give the leaves a part of their fall splendour. The breaking of chlorophyll causes leaves to turn into orange, yellow, and in some places in reddish and purplish. The arrival of the spring happens when fresh buds bloom, and the earth seems to come to life again with grasses and plants. Spring is the season of new beginnings.

uses : -

1.aneroid barometers primarily measure whether pressure is rising or falling.

2.aneroid barometers are often used for reading pressure in homes and recreational boats.  

3.other uses may include barographs in meteorology and altimeters in modern aircraft.  

4.this type of barometer can announce whether a high or low pressure system is coming or whether it is becoming more intense.  

5.there are different types of aneroid barometers, such as the altimeter, which measures altitude, or distance above sea level.  

6.another example is a barograph, which is a modified aneroid barometer that provides constant readings of atmospheric pressure on graph paper.  

7.when used in this capacity, the aneroid barometer can store a week's worth of data.

android diameter a device for measuring atmospheric pressure , often specially calibrated for use as an altimeter ,consisting of a box or chamber partially exhaused of air, having an elastic top and a pointer to indicate the degree of compression of the top caused by the external air

refer to the attachment for the characteristics : -