Ozone Measurements
ES used the GLOBE ozone measurement protocol. The GLOBE surface ozone measurement is taken using a chemically sensitive strip that changes color in the presence of ozone. The more ozone present, the more change that will occur. The chemical strip is placed in the clip of the monitoring station preferably within one hour of local solar noon and left exposed to the air for one hour. It is then read using a scanner, which reads the strip more accurately and precisely than the eye, enhancing the scientific value of these data. The amount of color change will increase if the strip is exposed to ozone for a longer period of time. Therefore, to ensure that data are comparable around the world, the protocol specifies that the strip be exposed for only one hour and that the time it is exposed and the time it is read are recorded to the nearest minute.
ES used the GLOBE ozone measurement protocol. The GLOBE surface ozone measurement is taken using a chemically sensitive strip that changes color in the presence of ozone. The more ozone present, the more change that will occur. The chemical strip is placed in the clip of the monitoring station preferably within one hour of local solar noon and left exposed to the air for one hour. It is then read using a scanner, which reads the strip more accurately and precisely than the eye, enhancing the scientific value of these data. The amount of color change will increase if the strip is exposed to ozone for a longer period of time. Therefore, to ensure that data are comparable around the world, the protocol specifies that the strip be exposed for only one hour and that the time it is exposed and the time it is read are recorded to the nearest minute.