Organization(s):

NOAA logo National Oceanic and Atmospheric Administration (NOAA), Earth System Research Laboratory (ESRL)


What does this program measure?

The ESRL GMD Meteorology program measures ambient and dewpoint temperatures, relative humidity, precipitation (in inches), and wind speed and direction.


How does this program work?

The dewpoint hygrothermometer measures ambient and dewpoint temperatures, from which relative humidity is calculated. Precipitation is continuously measured (in inches) with a tipping bucket.

A Mauna Loa PC based system utilizes RS-485 serial communications to collect data from the instruments. The data is recorded as one minute averages, except for precipitation. Precipitation is measured as a daily total accummulation.

Measurement
Instruments
Frequency
Air Temperature
Aspirated thermistor, 2m, 9m, 37mm heights
continuous
Air Temperature
Max/Min thermometers, 2-m height
daily
Temperature gradient
Aspirated thermistor, 2m, 9m, 37m heights
continuous
Dew point temperature
Dew point hygrometer, 2m height
continuous
Relative Humidity
TSL 2m height
continuous
Pressure
Capacitance Transducer
continuous
Pressure
Mercurial barometer
5/week
Wind (speed and direction)
10m, and 38m heights
continuous

Why is this research important?

In order to monitor the trends in meteorological parameters, and to assist in the interpretation of other parameters such as aerosols.


Are there any trends in the data?

Day rose and night rose (below) show the wind direction at the observatory. Note that the night rose shows only the southerly component which is the desired downslope conditions.

Day Rose
Night Rose

MLO press and MLO temps (below) is the running record since 1977. There is a slightly increasing trend in the ambient temperature since 1977.

MLO Pressure
MLO Temperatures


How does this program fit into the big picture?
What is it's role in global climate change?

It allows us to see how changes in other atmospheric variables affect the meteorology of the station.


Comments and References


Lead Investigator(s):

Thomas Mefford
303-497-6051


MLO Contact(s):

Paul Fukumura
808-933-6965
David Nardini
808-933-6965 (x229)


Web Site(s)

http://www.esrl.noaa.gov/
gmd/dv/met/mlo.html


Date Started

1977


Related Programs

Meteorology




Photographs:

Meteorology Sensors at MLOMeteorology sensors

TSI System (Temperature)TSL display

Meteorology Equipment at MLOMeteorology rack