Total depletion of Hg° in the upper troposphere-lower stratosphere

Details Total depletion of Hg° in the upper troposphere-lower stratosphere Total depletion of Hg° in the upper troposphere-lower stratosphere

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3423804t&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 23, CiteID L23804

Physics

11

Atmospheric Composition And Structure: Troposphere: Composition And Chemistry, Atmospheric Composition And Structure: Troposphere: Constituent Transport And Chemistry

Scientific paper

Our current understanding of atmospheric mercury lacks fundamental details. Gas phase elemental mercury (Hg°) was measured aboard the NASA DC-8 research aircraft during the Intercontinental Chemical Transport Experiment-Phase B (INTEX-B) conducted in spring 2006 over the North Pacific. Our data confirm efficient chemical cycling of Hg° in the tropopause region and show that it is strongly anti-correlated with O3 there, yielding a tropospheric-stratospheric mixing curve of ~-0.20 ppqv Hg°/ppbv O3. In addition, we found frequent total depletion of Hg° in upper tropospheric (8-12 km) air masses impacted by stratospheric influence. When O3 mixing ratios were >300 ppbv, Hg° was rarely detected. It appears that in the tropopause and stratosphere Hg° is oxidized on the order of days followed by heterogeneous transformation to particulate mercury. These processes constitute an effective chemical sink for Hg° at the top of the troposphere, which may recycle mercury back to the gas phase as stratospheric aerosols are eventually dispersed into the troposphere.

Affiliated with

Also associated with

No associations

Rating

Total depletion of Hg° in the upper troposphere-lower stratosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Total depletion of Hg° in the upper troposphere-lower stratosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Total depletion of Hg° in the upper troposphere-lower stratosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1758813