Tracer‐tracer relationships and lower stratospheric dynamics: CO2 and N2O correlations during SPADE
- 15 November 1994
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 21 (23) , 2567-2570
- https://doi.org/10.1029/94gl01985
Abstract
Simultaneous measurements of CO2 and N2O from the NASA ER‐2 aircraft during SPADE deployments in November 1992, April/May 1993, and October 1993 provide new information on transport rates in the lower stratosphere. The tropospheric seasonal cycle in CO2, superimposed on the long‐term trend, is observed to propagate into the stratosphere. The compact correlations observed between CO2 and N2O indicate that meridional transport is sufficiently rapid to create a uniform set of relationships over the northern hemisphere up to at least 21 km even though CO2 changes significantly on a time scale of 8 to 12 weeks. The observed seasonal dependence of the correlations indicates that vertical transport above 20 km is slower in northern summer than in winter and slow throughout the year between 19 km and the tropopause. The inferred amplitude of the seasonal CO2 oscillation in the stratosphere, viewed relative to N2O, places constraints on the mean latitude for air entering the stratosphere.This publication has 20 references indexed in Scilit:
- Evidence for interannual variability of the carbon cycle from the National Oceanic and Atmospheric Administration/Climate Monitoring and Diagnostics Laboratory Global Air Sampling NetworkJournal of Geophysical Research: Atmospheres, 1994
- Vertical transport rates in the stratosphere in 1993 from observations or CO2, N2O and CH4Geophysical Research Letters, 1994
- SPADE H2O measurements and the seasonal cycle of stratospheric water vaporGeophysical Research Letters, 1994
- Airborne tunable diode laser spectrometer for trace-gas measurement in the lower stratosphereApplied Optics, 1993
- Ozone Loss Inside the Northern Polar Vortex During the 1991-1992 WinterScience, 1993
- In situ measurements of carbon dioxide in the winter Arctic vortex and at midlatitudes: An indicator of the ‘age’ of stratopheric airGeophysical Research Letters, 1991
- Profile observations of long‐lived trace gases in the Arctic vortexGeophysical Research Letters, 1991
- High-latitude ozone loss outside the Antarctic ozone holeNature, 1989
- Atmospheric carbon dioxide measurements in the remote global troposphere, 1981-1984Tellus B: Chemical and Physical Meteorology, 1988
- Time and space variations of tropospheric carbon dioxide over JapanTellus B: Chemical and Physical Meteorology, 1987