Julien Chimot

May 122017

Following the past symposia in Lille, France in 2007 and in New Orleans in 2010, the 3rd NASA A-Train symposium was held on 19-21 April in Pasadena (California, USA). The NASA A-Train is a unique afternoon constellation including a high value series of instruments (Aqua (2002), Aura (2004), PARASOL (2004), CALIPSO (2006), CloudSat (2006), GCOM-W1 (2012) and OCO-2 (2014)) observing our atmosphere.

Julien Chimot was honoured to give a talk, on Thursday 20 April on our recently achieved developments related to the OMI aerosol layer height neural network development (Chimot et al., 2017) and its applications to urban pollution and biomass burning events.This work has been published in the AMT journal in Mars 2017

Many exchanges allow me to think further about 1) the difficulties, even for LIDAR space-borne sensors, to entirely probe smoke aerosol layers, 2) the possibility to inter-compare OMI and OCO-2 aerosol layer height products in the future.

A lot of talks and posters were focused on their contributions to our aerosol and cloud cycle knowledge, and the forthcoming new generation of satellite instruments such as 3MI on MetOp-SG and the new LIDAR EarthCare. Discussions were also held on the recently launched Chinese mission TANSAT, devoted to CO2 observation, which plans to join the constellation soon. With the American mission OCO-2, there will be 2 satellite missions focusing on the atmospheric carbon cycle!

Finally, it is worth noting the very interesting & inspiring discussion led by Dr. Bruce Wieliecki on the economic value of climate science. Obviously, this is a burning and still very open topic. And it is hard to reach a consensus in our community. But if we want to convince the society with business key words, the (huge!) return of investment of a new climate observing system should then be more quantitatively emphasized to initiate concrete actions.

Great thanks to all the organizers of this symposium (in particular to Liz Juvera) and to all the instrument PIs of the A-Train constellation!


2 weeks later. A poster was displayed by Dr. Pieternel Levelt at EGU 2017. See more details at https://julien-chimot-research.blog/2017/04/30/omi-aerosol-layer-height-neural-network-algorithm-at-egu-2017/

More information?

  • 3rd NASA A-Train symposium 2017 here
  • Talk at the 3rd NASA A-Train symposium: Chimot J., Veefkind P., Vlemmix T., de Haan J., Levelt P., Aerosol layer height retrieval from OMI+MODIS – A neural network approach, 3rd NASA A-Train symposium, Pasadena, California, USA, 2017.04.20 (Talk) here
  • Chimot et al., 2017: Chimot, J., Veefkind, J. P., Vlemmix, T., de Haan, J. F., Amiridis, V., Proestakis, E., Marinou, E., and Levelt, P. F.: An exploratory study on the aerosol height retrieval from OMI measurements of the 477  nm O2 − O2 spectral band using a neural network approach, Atmos. Meas. Tech., 10, 783-809, doi:10.5194/amt-10-783-2017, 2017 here
  • Follow https://julien-chimot-research.blog & @JChimotResearch

The entrance of the Pasadena convention centre, with the banner of the symposium.

Pasadena (California, USA) city-hall

Badge at the 3rd NASA A-Train symposium

Front slide of Julien Chimot talk at the 3rd NASA A-Train symposium, Pasadena (California, USA), 2017.04.20.

Jan 192017

17 February 2017 | 12:45 – 18:00
location: Theaterzaal (Sport & Culture)


Please register by sending an email to Secr-grs-citg@tudelft.nl.

The Geoscience & Remote Sensing (GRS) department of TU Delft, the TU Delft Climate institute and he Royal Netherlands Meteorological institute KNMI are pleased to invite you to the seminar Urban Air Quality, to be held at the TU Delft Theaterzaal (Sports & Culture) on Friday afternoon 17th February 2017.

Human activities, including industry, traffic, energy generation and food production, have an adverse impact on air quality. This is especially the case in urban areas, where more than half of the world populations lives. Ground based and satellite observations show that policies to reduce the emissions of pollutants are successful in improving air quality. However, is enough done to protect the health of the people in the cities and what can cities in developing countries learn from these successes?

This symposium will bring together experts in the field of  health effects, policy, emission monitoring, ground based observations and satellite remote sensing. It targets a broad audience from students in diverse topics, public, industries, policy makers and researchers. In addition to presentations, there will be possibilities for interactive discussions with the speakers.

See the program below