An assessment of the diurnal variation of upper tropospheric humidity in reanalysis data sets

Eui Seok Chung, Brian J Soden, B. J. Sohn, Johannes Schmetz

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Diurnal variations of upper tropospheric humidity (UTH) in five different reanalysis data sets are compared over convective land and ocean regions and evaluated using multiple satellite observations as a reference. All reanalysis data sets reproduce the day-night contrast of upper tropospheric humidity and the landocean contrast in the diurnal amplitude. The infrared satellite measurements indicate a slightly later diurnal minimum over land relative to most reanalyses and the microwave satellite measurements, suggesting that cloud masking of the infrared radiances may introduce a small (3 h) bias in the phase. One reanalysis exhibits a substantially different diurnal cycle over land which is inconsistent with both infrared and microwave satellite measurements and other reanalysis products. This product also exhibits a different covariance between vertical velocity, cloud water, and humidity than other reanalyses, suggesting that the phase bias is related to deficiencies in the parameterization of moist convective processes.

Original languageEnglish (US)
Pages (from-to)3425-3430
Number of pages6
JournalJournal of Geophysical Research C: Oceans
Volume118
Issue number9
DOIs
StatePublished - Aug 16 2013

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diurnal variations
diurnal variation
humidity
Atmospheric humidity
Satellites
Infrared radiation
microwaves
satellite observation
cloud water
Microwaves
products
masking
radiance
parameterization
night
oceans
Parameterization
cycles
ocean
water

ASJC Scopus subject areas

  • Atmospheric Science
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

An assessment of the diurnal variation of upper tropospheric humidity in reanalysis data sets. / Chung, Eui Seok; Soden, Brian J; Sohn, B. J.; Schmetz, Johannes.

In: Journal of Geophysical Research C: Oceans, Vol. 118, No. 9, 16.08.2013, p. 3425-3430.

Research output: Contribution to journalArticle

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