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contributor authorWargan, Krzysztof;Labow, Gordon;Frith, Stacey;Pawson, Steven;Livesey, Nathaniel;Partyka, Gary
date accessioned2018-01-03T11:01:08Z
date available2018-01-03T11:01:08Z
date copyright2/14/2017 12:00:00 AM
date issued2017
identifier otherjcli-d-16-0699.1.pdf
identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4246104
description abstractAbstractThe assimilated ozone product from the Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), produced at NASA?s Global Modeling and Assimilation Office (GMAO) spanning the time period from 1980 to the present is described herein, and its quality is assessed. MERRA-2 assimilates partial column ozone retrievals from a series of Solar Backscatter Ultraviolet Radiometer (SBUV) instruments on NASA and NOAA spacecraft between January 1980 and September 2004: starting in October 2004, retrieved ozone profiles from the Microwave Limb Sounder (MLS) and total column ozone from the Ozone Monitoring Instrument on NASA?s EOS Aura satellite are assimilated. The MERRA-2 ozone is compared with independent satellite and ozonesonde data, focusing on the representation of the spatial and temporal variability of stratospheric and upper-tropospheric ozone and on implications of the change in the observing system from SBUV to EOS Aura. The comparisons show agreement within 10% (standard deviation of the difference) between MERRA-2 profiles and independent satellite data in most of the stratosphere. The agreement improves after 2004, when EOS Aura data are assimilated. The standard deviation of the differences between the lower-stratospheric and upper-tropospheric MERRA-2 ozone and ozonesondes is 11.2% and 24.5%, respectively, with correlations of 0.8 and above, indicative of a realistic representation of the near-tropopause ozone variability in MERRA-2. The agreement improves significantly in the EOS Aura period; however, MERRA-2 is biased low in the upper troposphere with respect to the ozonesondes. Caution is recommended when using MERRA-2 ozone for decadal changes and trend studies.
publisherAmerican Meteorological Society
titleEvaluation of the Ozone Fields in NASA’s MERRA-2 Reanalysis
typeJournal Paper
journal volume30
journal issue8
journal titleJournal of Climate
identifier doi10.1175/JCLI-D-16-0699.1
journal fristpage2961
journal lastpage2988
treeJournal of Climate:;2017:;volume( 030 ):;issue: 008
contenttypeFulltext


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