Water Isotope Ratios D/H, 18 O/ 16 O, 17O/ 16 O in and out of Clouds Map Dehydration Pathways
- 5 December 2003
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 302 (5651) , 1742-1745
- https://doi.org/10.1126/science.1089496
Abstract
Water isotope ratios have been measured by laser absorption spectroscopy in and out of cirrus clouds formed in situ and convectively generated in anvils over subtropical regions. Water vapor in the tropical and subtropical upper troposphere shows a wide range of isotopic depletion not observed previously. The range suggests that dehydration of upper tropospheric air occurs both by convective dehydration and by gradual dehydration mechanisms. Twenty-five percent of upper tropospheric water sampled is in ice particles whose isotopic signatures are used to identify those grown in situ from those lofted from below.Keywords
This publication has 42 references indexed in Scilit:
- A one‐dimensional simulation of the water vapor isotope HDO in the tropical stratosphereJournal of Geophysical Research: Atmospheres, 2001
- Horizontal transport and the dehydration of the stratosphereGeophysical Research Letters, 2001
- The heat balance of the tropical tropopause, cirrus, and stratospheric dehydrationGeophysical Research Letters, 2001
- On the control of stratospheric humidityGeophysical Research Letters, 2000
- Interannual variability of the tropical tropopause derived from radiosonde data and NCEP reanalysesJournal of Geophysical Research: Atmospheres, 2000
- Stratosphere‐troposphere exchange: Inferences from the isotopic composition of water vaporJournal of Geophysical Research: Atmospheres, 2000
- A stratospheric “drain” over the maritime continentGeophysical Research Letters, 2000
- Simultaneous measurements of HDO, H2O, and CH4 with MIPAS‐B: Hydrogen budget and indication of dehydration inside the polar vortexJournal of Geophysical Research: Atmospheres, 1999
- In situ observations of NOy, O3, and the NOy/O3 ratio in the lower stratosphereGeophysical Research Letters, 1996
- A dehydration mechanism for the stratosphereGeophysical Research Letters, 1982