Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3510813d&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 10, CiteID L10813
Physics
22
Global Change: Global Climate Models (3337, 4928), Global Change: Impacts Of Global Change (1225), Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334)
Scientific paper
Recent observations show a distinct cooling of the tropical lower stratosphere, and chemistry-climate models (CCMs) suggest a link to a strengthening tropical upwelling, arguably related to increases in greenhouse gas concentrations from anthropogenic activity. The present study explores the strengthening of tropical upwelling by comparing ensemble realisations of two different transient scenarios with the CCM E39/C. Both scenarios share the same boundary conditions, including concentrations of ozone-depleting substances, but differ in their climate forcing via prescribed sea surface temperatures (SSTs) and well-mixed greenhouse gas concentrations. In the summer hemisphere tropics, higher SSTs amplify deep convection locally and hence the convective excitation of quasi-stationary waves. These waves propagate upward through the region of easterly winds while dissipating, but still carry enough of the signal into the low-latitude lower stratosphere to induce an anomalous low-latitude Brewer-Dobson (BD) cell. The transport change in turn increases the flux of ozone-poor tropospheric air into the tropical lower stratosphere.
Dameris Martin
Deckert R.
No associations
LandOfFree
Higher tropical SSTs strengthen the tropical upwelling via deep convection 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 Higher tropical SSTs strengthen the tropical upwelling via deep convection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Higher tropical SSTs strengthen the tropical upwelling via deep convection will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1541164