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Revisiting the lower stratospheric water vapour trend from the 1950s to 1970s

Roscoe, Howard K.; Rosenlof, K.H.. 2011 Revisiting the lower stratospheric water vapour trend from the 1950s to 1970s. Atmospheric Science Letters, 12 (4). 321-324. 10.1002/asl.339

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Abstract/Summary

Previous work showed a near-continuous increase in stratospheric water vapour between the 1950s and 1990s from a variety of instruments, without recourse to fits between instruments. We reassess the trend from the earliest, the UK frost-point hygrometer, 1954–1976. An error in previous work omitted to transform values from ppmm to ppmv. When corrected, they fit more convincingly with measurements by later frost-point hygrometers. Minor instrument changes between the 1950s and 1970s do not introduce a potential bias to the trend but do increase its error. If the full 1970s data are included, the trend becomes 2.1 ± 0.8%/year (two-sigma).

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/asl.339
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Climate
ISSN: 1530-261X
Additional Keywords: Stratosphere, Global change, Frost point
Date made live: 28 Feb 2012 17:33
URI: http://nora.nerc.ac.uk/id/eprint/16997

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