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Tropical Tropospheric Ozone observed from GOME_2 and perspectives for TROPOMI

Heue, Klaus-Peter and Hao, Nan and Valks, Pieter and Loyola, Diego and Miles, Georgina and Siddans, Richard and Raphoe, Nabiz (2015) Tropical Tropospheric Ozone observed from GOME_2 and perspectives for TROPOMI. In: ATMOS 2015 Abstract Book. ATMOS 2015, 08-12 Juni 2015, Kreta,Griechenland.

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Official URL: http://seom.esa.int/atmos2015/files/Abstract_Book_ATMOS2015_final_3.pdf


Tropospheric Ozone is of particular interest not only because it is a greenhouse gas, but also because it directly affects human health and causes agricultural damage. There is still a large uncertainty about the global distribution of tropospheric ozone, because ozone sondes are sparce. Here global distribution patterns as observed from satellites are an excellent tool to increase our knowledge and understanding of the underlying processes. The presented data are based on the ozone Level 2 products from the GOME and GOME_2 measurements and retrieved by a convective cloud differential (CCD) algorithm. The stratospheric O3 column is estimated by vertical column above large convective clouds. The difference between the total column for cloud free observations and the stratospheric column equals the tropospheric column. One of the underlying assumption is that the stratospheric column does not vary with longitude for certain latitude bands. Due to this assumption this method can only be applied in the tropics (20°S to 20°N). The results compare well with the ozone soundings from the SHADOZ network. The average bias between the tropospheric columns from the GOME observations and the ozone is sondes is below 1 DU and the standard deviation is about 5 DU. For some stations the tropospheric columns deviated in the mean by less than 0.1 DU, only for the northern and southern most stations (Hanoi and Réunion island) average discrepancies of 5 DU and more were found. The CCD tropospheric ozone product shows similar distribution patterns as other tropospheric ozone products. In particular a comparison with the direct level 2 ozone profile retrieval from RAL proofs the good quality of both products. Currently the data are gridded on a grid of 2.5° longitudinal by 1.25° latitudinal and monthly averaged to get a reasonable signal to noise ratio. With the upcoming S5P missions the spatial and temporal resolution might be reduced.

Item URL in elib:https://elib.dlr.de/100258/
Document Type:Conference or Workshop Item (Poster)
Title:Tropical Tropospheric Ozone observed from GOME_2 and perspectives for TROPOMI
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Date:8 June 2015
Journal or Publication Title:ATMOS 2015 Abstract Book
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:tropical Ozone
Event Title:ATMOS 2015
Event Location:Kreta,Griechenland
Event Type:international Conference
Event Dates:08-12 Juni 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Ozon-SAF (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute
Deposited By: Heue, Klaus-Peter
Deposited On:02 Dec 2015 11:33
Last Modified:31 Jul 2019 19:57

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