CCM CCM Meteorological Instrumentation & Data Quality

Question 1

Which type of anemometer is most commonly used in professional surface weather stations for accurate wind speed measurement?

Accepted Answer

Cup anemometer with wind vane

Answer

Cup anemometers paired with wind vanes are standard at professional surface stations due to their reliability, low maintenance, and accurate measurement of wind speed and direction.

Question 2

What is the primary purpose of a siting review when evaluating data from a surface weather station?

Accepted Answer

To assess whether nearby obstructions or heat sources introduce artificial biases into the recorded data

Answer

Siting reviews evaluate whether physical obstructions, pavement, buildings, or other local features cause the station's data to deviate from true ambient conditions.

Question 3

When a CCM uses data from an Automated Surface Observing System (ASOS) station for litigation support, which quality check is most important?

Accepted Answer

Verifying the station's maintenance records, calibration history, and any outage periods during the event

Answer

Litigation-quality ASOS data must be accompanied by evidence of proper calibration and maintenance, and any outages or sensor malfunctions during the event period must be identified.

Question 4

A consulting meteorologist notices a sudden 10°F spike in temperature data from a surface station during a clear, calm overnight period. This most likely indicates:

Accepted Answer

A sensor malfunction, data transmission error, or local heat source temporarily affecting the sensor

Answer

Sudden anomalous spikes in an otherwise stable overnight temperature record are classic indicators of sensor malfunction or data quality issues rather than real atmospheric events.

Question 5

What does the term 'homogenization' mean in the context of long-term climate data records?

Accepted Answer

Adjusting historical data to remove artificial discontinuities caused by station moves, instrument changes, or observer changes

Answer

Homogenization corrects for non-climatic discontinuities in long-term records caused by station relocations, instrumentation upgrades, or changes in observing practice.

(CCM) Certified Consulting Meteorologist Practice Test

(CCM) Certified Consulting Meteorologist Practice Test

CCM CCM Meteorological Instrumentation & Data Quality