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MLS Instrument Science Measurements
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Stratospheric Chemistry
The EOS
MLS
instrument will provide measurements of many chemical
species involved in the destruction of stratospheric
ozone. This instrument is a greatly enhanced version
of the UARS
MLS
instrument, including use of latest technology to
measure important species such as OH,
BrO and many
others which could not be measured by MLS
at the time the UARS
instrument was developed, as well as more precise
measurements and measurements over a larger altitude
range. The EOS
Aura orbit will allow MLS
measurements to be made to high latitudes every day
on each orbit, whereas the UARS
orbit required MLS
high-latitude coverage to switch, approximately monthly,
between the northern and southern hemispheres with
critical periods being missed.
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El Ni–o
Continuous measurement of global El Ni–o
effects will be a vital role EOS
MLS
will play in future years. The EOS
Aura orbit, will allow EOS
MLS
to provide pole-to-pole coverage every day making
it a major contributor to worldwide El Ni–o
event monitoring.
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MLS Science Objective
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The overall scientific objective of EOS
MLS
is to help improve understanding and assessment of :
Ozone Depletion
+ emphasis on the lower stratosphere, but
+ perform critical monitoring of the entire
stratosphere
+ during the period when ozone is most vulnerable
to destruction by chlorine
Climate Change
+ emphasis on processes in the upper troposphere
and lower stratosphere
+ for both seasonal-to-interannual and long-term
climate variability
Tropospheric Ozone
+ distribution of upper tropospheric ozone
measured directly
+ important for understanding effects of aviation
and radiative forcing of climate
+ distribution of total tropospheric ozone from
TOMS-MLS,
OMI-MLS
Volcanic Effects
+ on ozone depletion and climate change
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