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Representativeness of CO and O3 Along ATom Transects Derived from GEOS-5 and GMI-CTM SimulationsOne major goal for the NASA Atmospheric Tomography Mission (ATom) is producing an observation-based chemical climatology to represent the atmospheric heterogeneity. In this study, we use CO and O3 observations and global atmospheric model simulations to examine the spatial representativeness of the ATom-1 and -2 transects within a 4D framework provided by the NASA GEOS-5 and GMI-CTM models. Based on the probability density functions, we find that the variability of CO and O3 along the flight tracks is well hindcast by the model when sampled per ATom flights. The CO variations along the ATom-transect are likely representative of the typical CO variations over the whole Pacific basin during both the ATom-1 and -2 periods, the northern Atlantic during the ATom-1 period, and the tropical Atlantic in the ATom-2 period. Over southern Atlantic, CO along the ATom-1 transects is likely less well mixed than that of the broader region, but is still representative of the median CO concentration. CO along the ATom-2 transect is likely higher than the median CO concentration over this region. For O3, the agreements between PDFs of O3 sampled along the ATom transects and over the broader regions are fair to good over all six regions (Scores > 0.65) with notable discrepancies over some regions. For example, in ATom-1 over the northern Pacific and Atlantic, the transect samples air masses with higher O3 levels. During ATom-2, the transect over-represents the occurrence of O3 plumes over tropical Pacific. Over the southern Pacific and Atlantic for both ATom-1 and -2, the transects have a less uniform distribution compared to the surrounding basins, but still represent the median O3 abundance. Overall, we conclude in most cases that ATom measurements represent the statistical variations of these two species over the ocean basins at the time of measurement. Higher-order statistics, including covariance of species, has not been tested in this study.
Document ID
20190002571
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Liu, Junhua (Universities Space Research Association (USRA) Columbia, MD, United States)
Strode, Sarah A. (Universities Space Research Association (USRA) Columbia, MD, United States)
Prather, Michael J. (California Univ. Irvine, CA, United States)
Lait, Leslie R. (Morgan State Univ. Baltimore, MD, United States)
Conaty, Austin (Science Systems and Applications, Inc. Lanham, MD, United States)
Damon, Megan (Science Systems and Applications, Inc. Lanham, MD, United States)
Steenrod, Stephen (Universities Space Research Association (USRA) Columbia, MD, United States)
Newman, Paul A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Commane, Roisin (Lamont-Doherty Earth Observatory Palisades, NY, United States)
Daube, Bruce (Harvard Univ. Cambridge, MA, United States)
Wofsy, Steven (Harvard Univ. Cambridge, MA, United States)
Ryerson, Tom (National Oceanic and Atmospheric Administration (NOAA) Boulder, CO, United States)
Thompson, Chelsea (National Oceanic and Atmospheric Administration (NOAA) Boulder, CO, United States)
Peischl, Jeff (National Oceanic and Atmospheric Administration (NOAA) Boulder, CO, United States)
Olsen, Mark (Morgan State Univ. Baltimore, MD, United States)
Manney, Gloria (New Mexico Institute of Mining and Technology Socorro, NM, United States)
Bian, Huisheng (Maryland Univ. Baltimore County (UMBC) Baltimore, MD, United States)
Strahan, Susan (Universities Space Research Association (USRA) Columbia, MD, United States)
Date Acquired
April 17, 2019
Publication Date
November 13, 2018
Subject Category
Geophysics
Report/Patent Number
GSFC-E-DAA-TN67698
Meeting Information
Meeting: 2018 ATom Science Team Meeting
Location: Boulder, CO
Country: United States
Start Date: November 13, 2018
End Date: November 15, 2018
Sponsors: NASA Ames Research Center
Funding Number(s)
CONTRACT_GRANT: NNN12AA01C
CONTRACT_GRANT: NNX15AT34A
CONTRACT_GRANT: NNG11HP16A
CONTRACT_GRANT: NNG17HP01C
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
Technical Review
NASA Peer Committee
Keywords
ozone
tropospheric CO
ATom aircraft campaign
representativeness

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