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The Relation Between Atmospheric Humidity and Temperature Trends for Stratospheric WaterWe analyze the relation between atmospheric temperature and water vapor-a fundamental component of the global climate system-for stratospheric water vapor (SWV). We compare measurements of SWV (and methane where available) over the period 1980-2011 from NOAA balloon-borne frostpoint hygrometer (NOAA-FPH), SAGE II, Halogen Occultation Experiment (HALOE), Microwave Limb Sounder (MLS)/Aura, and Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) to model predictions based on troposphere-to-stratosphere transport from ERA-Interim, and temperatures from ERA-Interim, Modern Era Retrospective-Analysis (MERRA), Climate Forecast System Reanalysis (CFSR), Radiosonde Atmospheric Temperature Products for Assessing Climate (RATPAC), HadAT2, and RICHv1.5. All model predictions are dry biased. The interannual anomalies of the model predictions show periods of fairly regular oscillations, alternating with more quiescent periods and a few large-amplitude oscillations. They all agree well (correlation coefficients 0.9 and larger) with observations for higherfrequency variations (periods up to 2-3 years). Differences between SWV observations, and temperature data, respectively, render analysis of the model minus observation residual difficult. However, we find fairly well-defined periods of drifts in the residuals. For the 1980s, model predictions differ most, and only the calculation with ERA-Interim temperatures is roughly within observational uncertainties. All model predictions show a drying relative to HALOE in the 1990s, followed by a moistening in the early 2000s. Drifts to NOAA-FPH are similar (but stronger), whereas no drift is present against SAGE II. As a result, the model calculations have a less pronounced drop in SWV in 2000 than HALOE. From the mid-2000s onward, models and observations agree reasonably, and some differences can be traced to problems in the temperature data. These results indicate that both SWV and temperature data may still suffer from artifacts that need to be resolved in order to answer the question whether the large-scale flow and temperature field is sufficient to explain water entering the stratosphere.
Document ID
20140005463
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fueglistaler, S. (Old Dominion Univ. Norfolk, VA, United States)
Liu, Y. S. (Saint Andrew's Univ. United Kingdom)
Flannaghan, T. J. (Cambridge Univ. Cambridge, United Kingdom)
Haynes, P. H. (Cambridge Univ. Cambridge, United Kingdom)
Dee, D. P. (European Centre for Medium-Range Weather Forecasts Reading, United Kingdom)
Read, W. J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Remsberg, E. E. (NASA Langley Research Center Hampton, VA, United States)
Thomason, L. W. (NASA Langley Research Center Hampton, VA, United States)
Hurst, D. F. (National Oceanic and Atmospheric Administration Highlands, NJ, United States)
Lanzante, J. R. (National Oceanic and Atmospheric Administration Highlands, NJ, United States)
Bernath, P. F. (Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
May 12, 2014
Publication Date
January 1, 2013
Publication Information
Publication: Journal of Geophysical Research
Volume: 118
Issue: 2
Subject Category
Meteorology and Climatology
Report/Patent Number
NF1676L-15918
Funding Number(s)
WBS: WBS 479717.02.01.01.38
Distribution Limits
Public
Copyright
Other