Chemistry Aristo

[Kylee Evancho]

Along-term goal of the ACOM observational groups has been to utilize the wing mounted pod on the NCAR Gulfstream GV for chemistry measurements. This would include both a suite of standard atmospheric chemistry instruments (nitrogen, ozone, CO2), and a CIMS or time of flight spectrometer that could be installed in the wing mounted pod. Currently, a single wing mounted pod is used for the HIAPER cloud radar, with the other pod flown as ballast. The Engineering Support Group worked with Frank Flocke to develop a test of inlet and exhaust topologies, a thermal test for in/out flow through the existing NACA ducts and rear facing scoop, and a test of structure, plumbing, and instrumentation for inlet flow measurement. An inlet topology was developed and installed in the nose cone of the pod, and the exhaust of the inlet exited through a custom exhaust port mounted in an access panel on the pod. Flow velocity and turbulence were measured at different locations along the flow path. The thermal test used NACA ducts on the right side of the pod, with heaters and a finned heat sink used to estimate potential heat transfer from a finned surface in NACA duct flow. The pod inlet test was flown during the 2017 Airborne Research Instrumentation Testing Opportunity (ARISTO) test flight program.

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Project description: Pesticide transformation may lead to the formation of transformation products (TPs) that are equally or more toxic than the parent compound. The introduction of advanced analytical tools, e.g., high-resolution mass spectrometry, has enabled a more accurate annotation of the transformation pathways of pesticides. Based on these data, in silico tools have been developed that support the prediction of TPs for analytical suspect screening and also risk assessment purposes. The objectives of the project are to optimize enviPath, a publically available model for prediction of pesticides TPs jointly developed by Eawag and enviPath UG & Co.KG, and to expand it with in silico tools for predicting the soil microbial toxicity of pesticide TPs. Predictions will be validated for selected pesticides with experimental biotransformation studies carried out by the PhD student in collaboration with other fellows in the ARISTO project. The project will thus contain experimental work (including batch assays with activated sludge and soil, analytical chemistry) but its emphasis will lie on developing cheminformatics tools for transformation and toxicity prediction based on existing databases and new data generated within the ARISTO project. The fellowship involves interaction with other PhD students in the ARISTO network and secondments to other partners and beneficiaries of the project as described below.

Application Procedure

For this particular position the application, in English, must be submitted by mail to the coordinator dkarp...@uth.gr and via the Eawag recruiting tool at

Formal requirements and eligibility for all available positions

At the time of commencement, it is required that the candidate shall at the date of recruitment, be in the first four years (full time equivalent research experience) of their research careers and have not been awarded a doctoral degree. Furthermore, the candidate must not have resided or carried out their main activity (work, studies, etc.) in the countries where the hosting organizations are located for more than 12 months in the 3 years immediately prior to their recruitment. Short stays, such as holidays, are not taken into account.

Application Procedure

The application, in English, must be submitted by email to the supervisors of each advertised position and the coordinator of the project dkarp...@uth.gr. You are encouraged to apply for more than one of the available positions. In this case please indicate the position for which you are applying.

The Earth Observing Laboratory (EOL) of the National Center for Atmospheric Research (NCAR) manages and operates two heavily modified research aircraft, the NSF/NCAR HIAPER (GV) and NSF/NCAR C-130, at its Research Aviation Facility (RAF) located at the Rocky Mountain Metropolitan Airport (RMMA) near Broomfield, Colorado. In addition to the two aircraft, EOL's airborne program includes an extensive suite of aircraft instrumentation, including both in-situ and remote-sensing instruments for dynamical, thermodynamical, microphysical, radiation and trace gas measurements. A suite of atmospheric chemistry instrumentation is also offered by NCAR's Atmospheric Chemistry Observations and Modeling (ACOM) Laboratory that works in partnership with EOL in supporting atmospheric chemistry campaigns. The NCAR research aviation program is supported primarily by the US National Science Foundation. The two NSF/NCAR aircraft are deployed world-wide by the NCAR teams in support of airborne observational field campaigns, primarily supporting NSF-funded investigators. Frequently, these airborne campaigns are complex and entail multiple funding agencies and observational assets, including research aircraft operated by different agencies, often in concert with ground based facilities (e.g. radars, lidars, mesonets, profilers, and sounding systems, which are also offered by EOL). The campaigns supported recently by NCAR include ORCAS (GV, Southern Ocean, Jan-Feb 2016), ECLIPSE (GV, US, Aug 2017), SOCRATES (GV, Southern Ocean, Jan-Feb 2018), WE-CAN (C-130, West US, July-Sept 2018). The upcoming deployments are ECLIPSE 2019 (GV, Chile, July 2019), OTREC (GV, Costa Rica, Aug-Sept 2019) and MethaneAIR (GV, Colorado, Nov 2019 and Feb 2020), with a number of campaigns in various proposal stages for the 2020-2022 time-frame. The NCAR airborne instrumentation program includes also advanced airborne instrument developments (e.g., APAR, HCR, HOLODEC, LAMS, TOGA-TOF) and the Airborne Research Instrumentation and Testing Opportunity (ARISTO) flight test program for newly developed or highly modified instruments as part of their development effort. EOL also provides field project management and data management and archival capabilities, which are an essential part of modern airborne campaigns.

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