PhD-project title: Observation of Megacity pollution from space
One of the largest changes over the last century is the massive increase in human population globally. At the same time, the percentage of people living in large cities is increasing rapidly. A large fraction of anthropogenic emissions is released to the atmosphere in these cities, and this trend is expected to continue as more and more countries industrialise while population is still on the rise. As a result, large cities are hotspots of pollution problems and at the same time have a significant impact on air quality on a global scale. One particular problem is the formation of ozone, a secondary pollutant with health and climate implications.
Using measurements from satellite based spectrometers, the spatial distribution and the temporal evolution of nitrogen dioxide NO2 and formaldehyde HCHO, two important ozone precursors can be determined. These measurements in combination with the results of atmospheric chemistry models such as MOZART can be used to asses the impact of large cities on the atmosphere, to validate model calculations and to estimate future developments. In this PhD, data from the GOME. SCIAMACHY and GOME-2 satellite instruments will be used to derive a consistent data set of tropospheric columns of NO2 and HCHO, to study their evolution and the importance of large cities on their global budgets. This work will be performed in close collaboration with an international project on the impact of Mega-Cities.
Start of doctoral thesis: 01.06.2008
PhD colloquium: 05.02.2014 (view thesis)
Supervisor: Prof. Dr. J. P. Burrows (Uni-HB/IUP)
Co-Supervisor: Dr. A. Richter (Uni-HB/IUP)
Further member: Dr. T. Wagner (Max-Planck-Institut für Chemie, Mainz)
Hilboll, A., Richter, A., Rozanov, A., Hodnebrog, Ø., Heckel, A., Solberg, S., Stordal, F., and Burrows, J. P.: Improvements to the retrieval of tropospheric NO2 from satellite – stratospheric correction using SCIAMACHY limb/nadir matching and comparison to Oslo CTM2 simulations, Atmos. Meas. Tech., 6, 565-584, doi:10.5194/amt-6-565-2013, 2013.
Hilboll, A., Richter, A., and Burrows, J. P.: Long-term changes of tropospheric NO2 over megacities derived from multiple satellite instruments, Atmos. Chem. Phys., 13, 4145-4169, doi:10.5194/acp-13-4145-2013, 2013.
Richter, A., Begoin, M., Hilboll, A., Burrows, J.P.: An improved NO2 retrieval for the GOME-2 satellite instrument. Atmos. Meas. Tech., 4, 1147-1159, doi:10.5194/amt-4-1147-2011, 2011.
Konovalov, I. B., Beekmann, M., Richter, A., Burrows, J. P., and Hilboll, A.: Multi-annual changes of NOx emissions in megacity regions: nonlinear trend analysis of satellite measurement based estimates, Atmos. Chem. Phys. Discuss., 10, 10925-10968, 2010.
Kanakidou, M., Mihalopoulos, N., Kindap, T., Im, U., Vrekoussis, M., Gerasopoulos, E., Dermitzaki, E., Unal, A., Koçak, M., Markakis, K., Melas, D., Mouvarakis, G., Youssef, A.F., Richter, A., Hatzianastassiou, N., Hilboll, A., Ebojie, F., von Savigny, C., Ladstaetter-Weissenmayer, A., Burrows, J.P., Moubasgher, H.: Megacities as hot spots of air pollution in the East Mediterranean. Atmos. Environ., doi:10.1016/j.atmosenv.2010.11.048, 2010.
Noguchi, K., Richter, A., Bovensmann, H., Hilboll, A., Burrows, J.P., Irie, H., Hayashida, S., Morino, Y.: A feasibility study for the detection of the diurnal variation of tropospheric NO2 over Tokyo from a geostationary orbit. Adv. Space Res., doi:10.1016/j.asr.2011.06.029, in press.
Hilboll A, Richter A, Vrekoussis M, Burrows JP: Trends in tropospheric NO2 over megacities in the Mediterranean and Middle East regions from GOME and SCIAMACHY. EGU general assembly 2010, Vienna, Austria, May 2010. [PDF]
Hilboll A, Trends in tropospheric nitrogen dioxide (NO2) over megacities in the Mediterranean and Middle East regions from GOME and SCIAMACHY. Seminar Ocean, Ice, and Atmosphere, Institute of Environmental Physics, University of Bremen, Bremen, Germany, April 2010. [PDF]
Hilboll A: Satellite measurements of tropospheric trace gases in the CHARMEX project. CHARMEX WP1 Trends workshop, Paris, France, October 2009. [PDF]
Richter A, Hilboll A, Burrows JP: Improvements in GOME-2 retrievals of NO2. O3M SAF User & Algorithm Forum, Halkidiki, Greece, June 2009.
Hilboll A: Projekt "atmosfair" – eine Antwort auf die Klimafolgen des Flugreisens? International summer school "Prima Klima! Auswirkungen des Klimawandels auf Freizeit und Tourismus", Hochschule Bremen, Germany, July 2008.
Andreas Hilboll, Nadine Wieters, A. Richter, B.M. Sinnhuber, and J.P. Burrows, The impact of the stratospheric correction on tropospheric NO2 measurements from satellites, EGU General Assembly, 19 - 24 April 2009. (Poster, PDF)
A. Richter, Andreas Hilboll, and J. P. Burrows: "Improvements in GOME-2 retrievals of NO2", O3M SAF User & Algorithm Forum, Halkidiki, Greece, 2-4 June 2009.
Richter, A., Leitão, J., Hilboll, Andreas, Wittrock, F., Vrekoussis, M., and Burrows, J.P.: "Using Satellite Measurements to study the Impact of MegaCities on Air Pollution". 7th International Conference on Air Quality – Science and Application, Istanbul, 2009.(Poster)
Hilboll A: Observation of Megacity pollution from space. 1st ESSReS annual retreat, Bremerhaven, Germany, August 2009. [PDF]
Andreas Hilboll, Joana Leitão, Mihalis Vrekoussis, Andreas Richter, John P. Burrows, Trends in tropospheric NO2 from SCIAMACHY over megacities in the Mediterranean and Middle East, ESA Atmospheric Science Conference, Barcelona, 7 - 11 September 2009. (Poster, PDF)
Richter A, Hilboll A, Zien A and Burrows JP: GOME-2 satellite observations of NOx emissions from ships. DPG Spring meeting, Hannover, Germany, March 2010. [PDF]
Zien A, Richter A, Hilboll A, and Burrows JP: Cloud effects on tropospheric NO2 measurements from satellite. DPG Spring meeting, Hannover, Germany, March 2010. [PDF]
Richter A, Hilboll A, Zien A and Burrows JP: GOME-2 satellite observations of NOx emissions from ships. EGU General Assembly, Vienna, Austria, May 2010. [PDF]