Articles | Volume 10, issue 6
Clim. Past, 10, 1983–2006, 2014
Clim. Past, 10, 1983–2006, 2014
Research article
21 Nov 2014
Research article | 21 Nov 2014

HadISDH land surface multi-variable humidity and temperature record for climate monitoring

K. M. Willett et al.

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Expanding HadISD: quality-controlled, sub-daily station data from 1931
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Manuscript not accepted for further review
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Cited articles

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Allen, M. R. and W. J. Ingram,: Constraints on future changes in climate and the hydrological cycle, Nature, 419, 224–232, 2002.
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BIPM (Bureau International des Poids et Mesures): Guide to the Expression of Uncertainty in Measurements. Joint Committee for Guides in Metrology JCGM 100, available at: (last access: August 2012), 120 pp., 2008.
Short summary
We have developed HadISDH, a new gridded global land monthly mean climate montitoring product for humidity and temperature from 1973 to then end of 2013 (updated annually) based entirely on in situ observations. Uncertainty estimates are provided. Over the period of record significant warming and increases in water vapour have taken place. The specific humidity trends have slowed since a peak in 1998 concurrent with decreasing relative humidity from 2000 onwards.