Organization(s):

NOAA logo
National Oceanic and Atmospheric Administration (NOAA), Earth System Research Laboratory (ESRL)
NDSC logo
Network For the Detection of Atmospheric Composition Change (NDACC)
NIWA logo
National Institute of Water and Atmospheric Research (NIWA)


What does this program measure?

The program measures Nitrogen Dioxide (NO2), including NO2 90° slant column density data, from Mauna Loa Observatory.


How does this program work?

The NO2 monitor uses a single grating monochromator to measure the zenith skylight between 450 nm and 490 nm, with a resolution of about 1 nm. Scans are made under computer control during early and late morning, and a difference method is used to retrieve NO2 concentration using known absorption lines of the gas. By using scans from various times during the morning it is possible to obtain a profile of NO2.


Why is this research important?

It is important to continuously monitor stratospheric NO2 at MLO.


Are there any trends in the data?


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


Comments and References


Lead Investigator(s):

Paul V. Johnston (NIWA)
011-643-440-0429


MLO Contact(s):

Paul Fukumura
808-933-6965 (x223)
Dr. John E. Barnes
808-933-6965 (x222)


Web Site(s)

www.niwa.co.nz

www.esrl.noaa.gov/gmd/grad/
uv.html


Date Started

July 9, 1996


Related Programs

NDACC




Photographs:

BrO and NO2 sensor chimneysBromine Oxide (near) and Nitrogen Dioxide (far) sensor chimneys on MLO sun deck