One-day pre-AdMet workshop on “Chemical Metrology: Challenges and Opportunities in Gases & Aerosols” 20 February 2013, New Delhi, India
This one-day workshop is a part of 8th International Conference on “Advances in Metrology-2013” (AdMet-2013) to be held in New Delhi at CSIR-National Physical Laboratory (NPL) from February 20-23, 2013. The “Gas and Aerosol Metrology” activity is a part of “Metrology in Chemistry (MiC)” program, which is initiated during 11th FYP in 2007 by National Physical Laboratory, India (NPLI).
The focus of this one-day workshop would be the role of metrology in atmospheric measurements for gases and aerosols, which are the components of the atmosphere and affect local, regional and global climate. Their reliable monitoring is required for various parameters by environmental researchers, industries, regulatory requirements and global conventions. Aerosols are short-lived as compared to greenhouse gases, their impact is more regional, and the extent of their cooling and heating effects on earth’s system is quite uncertain. Challenges in measurements of the mixing ratios of reactive gases, such as SO2, NOx, CO, VOCs, etc. whose temporal and spatial distribution is very uncertain and their interactions for gas-to-aerosol transformations further enhances the uncertainty in modeling of their combined effect on climate and health. In the climate models a small error in measurements of these components enhances the complexity in understanding their impact. For example, black carbon (BC) intends warming effect, whereas other major components of aerosol particles, such as organics and sulfates (which largely form through gas-to-particle conversions) exhibit cooling effect to the earth’s system. Therefore, confidence in reliable measurements which are traceable with global comparability, have a key role in our better understanding towards gas-aerosol effects, their climate and human health consequences.
To meet above challenges, the standard measurement protocols/ methods and techniques are required. Addressing traceability of International Systems of Units (SI) would make measurement data globally comparable and reliable. Calibration of the instruments performance, validation of methods may be done using reference materials (RMs) certified and produced through metrological sound procedures/ standards (like ISO) are important link for SI traceability. Industries/ institutions intend to produce RMs need to have ISO-17025/ Guide 34/35 compliance to provide several products in this field where requirements are manifold to variety of stakeholders. Opportunities are many for such private public partnerships. NABL has taken initiative to start the accreditation for such PT scheme providers and CRM producers. NPL intend to provide traceability of SI for such efforts so that Indian industries and users may offer world class services and do high end research. Thus generating such quality measurement data becomes reliable for building confidence and allows the comparison of results by different stakeholders.
There are various examples in gas-aerosol measurements wherein, though several comparison results are available (based on the data collected at different sites of the world), there is no surety about the significance of the comparison results, as the calibration standards used for the purposes are generally not traceable. Therefore there is a strong need for making all stakeholders aware about recent developments in the above issues and this workshop will play significant role.
This one-day pre-AdMet workshop is designed to invite the experts so that participants can see the present status and challenges and look for opportunities. In this workshop focus would be on the recent developments in gas-aerosol metrology, CRMs, traceability, measurement methods, and present status of national efforts/ calibration facilities by NPL India as NMI under MiC.