NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Troposphere-to-Stratosphere Transport in the Lowermost Stratosphere from Measurements of H2O, CO2, N2O and O3The origin of air in the lowermost stratosphere is investigated with measurements from the NASA ER-2 aircraft. Air with high water vapor mixing ratios was observed in the stratosphere at theta-330-380 K near 40 N in May 1995, indicating the influence of intrusions of tropospheric air. Assuming that observed tracer-tracer relationships reflect mixing lines between tropospheric and stratospheric air masses, we calculate mixing ratios of H2O (12-24 ppmv) and CO2 for the admixed tropospheric air at theta=352-364 K. Temperatures on the 355 K surface at 20-40 N were low enough to dehydrate air to these values. While most ER-2 CO2 data in both hemispheres are consistent with tropical or subtropical air entering the lowermost stratosphere, measurements from May 1995 for theta<362 K suggest that entry of air from the midlatitude upper troposphere can occur in conjunction with mixing processes near the tropopause.
Document ID
19990047404
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hintsa, E. J.
(Harvard Univ. Cambridge, MA United States)
Boering, K. A.
(Harvard Univ. Cambridge, MA United States)
Weinstock, E. M.
(Harvard Univ. Cambridge, MA United States)
Anderson, J. G.
(Harvard Univ. Cambridge, MA United States)
Gary, B. L.
(Jet Propulsion Lab. Cape Canaveral, FL United States)
Pfister, L.
(NASA Ames Research Center Moffett Field, CA United States)
Daube, B. C.
(Harvard Univ. Cambridge, MA United States)
Wofsy, S. C.
(Harvard Univ. Cambridge, MA United States)
Loewenstein, M.
(NASA Ames Research Center Moffett Field, CA United States)
Podolske, J.R.
(NASA Ames Research Center Moffett Field, CA United States)
Margitan, J. J.
(Jet Propulsion Lab. Cape Canaveral, FL United States)
Bui, T. P.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 19, 2013
Publication Date
July 15, 1998
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 25
Issue: 14
ISSN: 0094-8534
Subject Category
Geophysics
Report/Patent Number
Paper-98GL01797
Funding Number(s)
CONTRACT_GRANT: NCC2-694
CONTRACT_GRANT: NCC2-913
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available