TNA experiences and Main Scientific Results

TNA Experiences

In the following you can find examples of recente TNA projects hosted at the CMN-PV facility.

Measurements Intercomparison for New Spectroscopic Instrument Calibration (MINSPEC)

Nitrogen dioxide (NO2) and ozone (O3) are two of the most studied atmospheric compounds due to their interactions and behaviour depending on the photochemistry and heterogeneous chemical reactions involving these elements. In the stratosphere O3 act as a filter for the harmful UV radiation while at the surface O3 is a strong pollutant and NO2 plays an important role in controlling tropospheric ozone.

Nowadays the trace gases monitoring is performed from many different platforms from different point of view and with different techniques. The satellite systems gives a global coverage of the Earth and in the last years the spatial resolution of the observations increased of about 3 order of magnitude. For obvious reasons, satellite system can only perform remote sensing measurements both in active (lidar) as in passive (imager/spectrometers) modes. Ground-based observations can be performed with ‘in situ’ as well as remote sensing techniques.

The goal of the MINSPEC experiment was to perform NO2 and O3 remote-sensing measurements in the Po basin with a SPATRAM3 (Spectromweter for Atmospheric Tracers Monitoring Rel.3) system and to compare instrument performance with a similar ACTRIS-compliant system working at the CMN-PV facility.

"We decided to access the CMN - PV facility because this facility is one of the most complete laboratory existing in Italy with high-qualified staff with strong expertises in active/passive remote sensing techniques and solar instrumentation" -  Dr. Miguel Potes, PI of the MINSPEC project, said. "Moreover, it is located in one of the most polluted region in Europe (i.e. the Po basin) and our measurements can be valuable in terms of scientific exploitation".

MINSPEC instruments with users with CNR staff at CMN-PV
MINSPEC instruments and user staff with CNR staff at CMN-PV

Radio Interferometric Characterisation of High Energy Sources from Thunderstorms (RICHEST)

Thunderstorms are the site of the most energetic natural particle accelerators on Earth, capable to accelerate electrons up to several tens of MeV. Acceleration can be impulsive, resulting in submillisecond photon bursts termed Terrestrial Gamma-ray Flashes (TGF), so bright that can be detected from space by satellites hosting gamma-ray detectors. Acceleration can also take place as a quasi-stationary process, resulting in large-scale minute-long Gamma-ray Glows, that can be detected by aircrafts flying in the vicinity of thunderstorms, or by ground-based detectors. Thousands of TGFs have now been detected from space, while detections of TGFs and gamma-ray glows from ground are still sparse and limited to few locations in the world. The goal of the RICHEST project, performed in the framework of the ATMO-ACCESS TNA Program, was to perform dedicated lightning measurements to be run simultaneously with the gamma-ray detection by the National Project GAMMA-FLASH.

RICHEST instrumentation field deployment at CMN-PV (July 2022).
RICHEST instrumentation field deployment at CMN-PV (July 2022).
“We are an international team joining scientists from Norway, UK, Spain and Italy” – RICHEST Principal Investigator Martino Marisaldi, said. “Our goal was the study of lightning activity near the Mt. Cimone station using radio receivers in a wide range of frequencies, in correlation with an experiment aimed at observing high-energy gamma-rays sometimes produced in thunderstorms. Our experience in the field has been great: the location was perfect, and the logistic support from ISAC personnel, the local Air Force base, and the workers at ‘Consorzio Monte Cimone’ has been highly professional and outstanding. We managed to realize the radio survey of the site, in preparation of further measurements, and we obtained high-quality radio measurements of lightning that we are planning to publish soon.”

                                                                               Medusa Enhanced Volatile Organic Compounds (MEVOC)

Anthopogenic Non-Methane Volatile Organic Compounds (NM-VOC) are reactive atmospheric species with direct effects on human health and ecosystems. Moreover, through their oxidation products, NM-VOCs promote the formation of tropospheric ozone and secondary aerosol, which are important pollutants but also anthropogenic climate forcers. In Europe, only 4 observatories are performing continuous observations of these important species with the accuracy and traceability needed for long-term monitoring of their atmospheric levels and for emission trend assessment. For almost 20 years, an instrument to continuously monitor 15 NM-VOCs has operated at the CMN-PV facility: the sampling location, which overlooks an important source region in the Po basin and is the Southernmost NM-VOC monitoring site in Europe, is crucial for tracking and quantifying emissions of these compounds at regional scale.

Within MEVOC, a team composed by University of Bristol and Terramodus private company,  installed a "Medusa" GCMS preconcentration system at CMN-PV to enhance the previously existing instrumentation and make observations at CMN-PV consistent with other European stations. Optimisation of this specialist equipment was undertaken and training of the local operators conducted. The increased number of observed species and improved precision from the Medusa GCMS is useful for NM-VOC regulations as well as other international regulations such as the Paris Agreement.

Chart, scatter chart Description automatically generated

Propane atmospheric mixing ratio (upper plot measured in ppt) and instrument precision (lower plot in %) measured by the new Medusa (blue) and the older ADS (red) system at Monte Cimone under MEVOC Project.

Example of Past Scientific Results (last 10 years)

Here you can find a selection of some of the most important scientific results obtained by the contribution of the atmospheric experimental activities carried out at the M. Cimone – Po valley facility in the last 10 years.

  • Cai, J., Sulo, J., Gu, Y., Holm, S., Cai, R., Thomas, S., Neuberger, A., Mattsson, F., Paglione, M., Decesari, S., Rinaldi, M., Yin, R., Aliaga, D., Huang, W., Li, Y., Gramlich, Y., Ciarelli, G., Quéléver, L., Sarnela, N., Lehtipalo, K., Zannoni, N., Wu, C., Nie, W., Mohr, C., Kulmala, M., Zha, Q., Stolzenburg, D., and Bianchi, F.: Elucidating the mechanisms of atmospheric new particle formation in the highly polluted Po Valley, Italy, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2023-1803, 2023.

  • Fratticioli C, al et. Continuous atmospheric in-situ measurements of the CH4/CO ratio at the Mt. Cimone station (Italy, 2165 m a.s.l.) and their possible use for estimating regional CH4 emissions. Environ. Res . 2023;232. doi:10.1016/j.envres.2023.116343

  • Putero D, al. et. Fingerprints of the COVID-19 economic downturn and recovery on ozone anomalies at high-elevation sites in North America and western Europe. Atmos. Chem. Phys. 2023;23. doi:10.5194/acp-23-15693-2023

  • Cristofanelli P, al. et. Negative ozone anomalies at a high mountain site in northern Italy during 2020: a possible role of COVID-19 lockdowns?. Environmental Research Letters 2021. doi:https://doi.org/10.1088/1748-9326/ac0b6a

  • Vollmer MK et al. Unexpected nascent atmospheric emissions of three ozone-depleting hydrochlorofluorocarbons. PNAS 2021;118(5). doi:https://doi.org/10.1073/pnas.2010914118

  • Bhandari J, et al.  Extensive soot compaction by cloud processing from laboratory and field observations.  Scientific Reports 2019. doi:https://doi.org/10.1038/s41598-019-48143-y.

  • Prinn RG, et al.  History of chemically and radiatively important atmospheric gases from the Advanced Global Atmospheric Gases Experiment (AGAGE).  Earth System Science Data 2018: 10, 985-1018. https://doi.org/10.5194/essd-10-985-2018

  • Graziosi F, et al. European emissions of the powerful greenhouse gases hydrofluorocarbons inferred from atmospheric measurements and their comparison with annual national reports to UNFCCC. Atmospheric Environment 2017;158. doi:https://doi.org/10.1016/j.atmosenv.2017.03.029

  • Rinaldi M, et al. Atmospheric Ice Nucleating Particle measurements at the high mountain observatory Mt. Cimone (2165~m a.s.l., Italy). Atmospheric Environment 2017;171. doi:https://doi.org/10.1016/j.atmosenv.2017.10.027

  • Graziosi F, et al.   Emissions of Carbon Tetrachloride (CCl4) from Europe.  Atmospheric Chemistry and Physics 2016; 16, 12849-12859.

  • Duchi R, al et.  Long-term (2002-2012) investigation of Saharan dust transport events at Mt. Cimone GAW global station, Italy (2165 m a.s.l.).  Elementa Science of Anthropocene 2016;4. doi:https://doi.org/10.12952/journal.elementa.000085

  • Cristofanelli P, et al. Long-term surface ozone variability at Mt. Cimone WMO/GAW global station (2165 m a.s.l., Italy). Atmospheric Environment 2014;101:23-33. doi:https://doi.org/10.1016/j.atmosenv.2014.11.012

  • Paasonen P , et al.  Warming-induced increase in aerosol number concentration likely to moderate climate change.  Nature Geosciences 2013:6, 438-442, 2013.

  • Svenningsson B, et al.  Hygroscopic growth and critical supersaturations for mixed aerosol particles of inorganic and organic compounds of atmospheric relevance.  Atmospheric Chemistry and Physics 2006. doi:https://doi.org/10.5194/ACP-6-1937-2006

  • Putaud J-P, et al.  A European aerosol phenomenology—2: chemical characteristics of particulate matter at kerbside, urban, rural and background sites in Europe.  Atmospheric Environment 2004: 38 (16), 2579-2595. https://doi.org/10.1016/j.atmosenv.2004.01.041.

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