Home > News > Seminars > Séminaire de John Worden

Seminar

Title : Tropospheric Ozone, Composition, and Climate from the Aura Tropospheric Emission Spectrometer
Name of the speaker : John Worden
Affiliation : NASA JPL
Laboratory organizer : LMD
Date and time : 12-05-2014 10h30
Location : Salle de réunion du LMD (UPMC, 4 place Jussieu - T45-55, 3e étage)
Summary :


Atmospheric composition is rapidly changing in response to industrialization, land-use, and climate with a future trajectory that is uncertain. In particular, tropospheric ozone is at the nexus of atmospheric chemistry, air-quality, and climate as it is the third most important greenhouse gas, a primary air pollutant, affects carbon dioxide by damaging plants, and the lifetime of atmospheric methane by influencing the oxidative capacity of the atmosphere.


As part of the Aura spacecraft launched in 2004, the 
Tropospheric Emission Spectrometer (TES) has provided key data necessary to quantify how anthropogenic emissions, fires, lightning, dynamics, and climate variability control the global distribution of tropospheric ozone and its impact on air quality, composition, and climate. While TES was designed primarily for atmospheric chemistry, the rich information available from TES spectra has also enabled new science related to the water, carbon, and nitrogen cycles and their linkages with atmospheric chemistry and ozone.


The TES record in conjunction with other EOS data have revealed that atmospheric composition is changing in ways that are unexpected. To predict these changes in an evolving climate, an earth-system perspective is required in order to assess the feedbacks between climate, chemistry and the water, carbon, and nitrogen cycles.


We show how innovative remote sensing technique pioneered by the TES team can be used to continue critical tropospheric composition measurements on Soumi-NPP and Aqua-AIRS as a part of the ACC-CEOS air quality constellation, which includes TEMPO, and inform the design of new mission concepts such as GACMM. These measurements in conjunction with near-term missions such as OCO-2 and SMAP will provide the vital information needed to address how atmospheric composition interacts with the broader Earth System in a changing climate.

Contact :

MP Lefebvre (0144272799)