1. Investigating the Influence of Meteorological Parameters on Atmospheric Electric Field (AEF) Variations for Islamabad and Balakot, Pakistan
Dr. Samia Faiz Gurmani
Senior Scientist
Centre for Earthquake Studies, NCP

2. OBJECTIVE and PROJECTS
Observing the variation in atmospheric electric filed of these stations with respect to meteorological parameters and aerosol during fair-weather days
Data Analysis of atmospheric electric field for Islamabad, Multan, Balakot and Terbella Stations,
Diurnal, Seasonal and annual observation of AEF for all station in Pakistan
Working on Thunder days Data base for Pakistan for WMO and to get previous Archived data

3. ATMOSPHERIC ELECTRIC FIELD
A region around a charged particle or object within which a force would be exerted on other charged particles or objects.

4. GLOBAL ATMOSPHERIC ELECTRIC CIRCUIT
The movement of charge between the Earth's surface, the atmosphere, and the ionosphere is known as the global atmospheric electrical circuit.
Ionosphere acts as a positive electrode and earth as a negative electrode in global electrical circuit.
Circuit looks simple but shows complex variations with latitude, longitude, magnetospheric & ionospheric processes, also pollution and climate change

5. APPLICATIONS
The Diurnal curves of Fair weather will be important to asses how the properties of GAEC vary as a function of time on different scales.
To study the behavior of the GAEC in relation to solar and space weather phenomena, e.g. Atmospheric electric field variation during total solar Eclipse.
To observe the short-term anomaly for the precursors of enhanced seismic activity in the region.
J. Tacza et al. / Journal of Atmospheric and Solar-Terrestrial Physics 120 (2014)
J.C. Tacza et al. / Advances in Space Research 58 (2016)
Harrison, R. G. (2004) The global atmospheric electrical circuit and climate. Surveys in Geophysics, 25 (5-6)

6. ELECTRIC FIELD MILL Electric Field Mill
Electric Field Mills are designed to determine the relative strength of the electric field.
Zebra field mill mounted in Multan at rooftop
Figure . EFS 1001 Simplified Diagram

7. RESULTS and DISCUSSION

8. ATMOSPHERIC ELECTRIC FIELD FOR ISLAMABAD
Annual Variations

9. ATMOSPHERIC ELECTRIC FIELD FOR ISLAMABAD
Islamabad curve and Carnegie curve
Gurmani et. al. 2018

10. ATMOSPHERIC ELECTRIC FIELD FOR BALAKOT
Annual Variations

11. LAND-BASED COMPARISON of ISLAMABAD and BALAKOT
After: Yanive et. al. 2016
Land-based measurements of different sites all over the world including Islamabad and Balakot with respect to their local time

12. CARNEIGE CURVE and PAKISTAN SITES
After: Harrison et. al. 2013

13. ANNUAL ELECTRIC FIELD WITH RESPECT TO MONTHS

14. Meteorological Parameters Effect on AEF (Balakot)
Rel. Humidity Pressure Temperature
Meteorological Parameters Effect on AEF (Balakot)

15. Meteorological Parameters Effect on AEF (ISLAMABAD)
Rel. Humidity Pressure Temperature
Meteorological Parameters Effect on AEF (ISLAMABAD)

16. AEF variation in Jinhong Observatory, China
[Xie Yiran et. al. 2014]

17. PUBLISHED WORK IN 2018

18. PUBLISHED WORK IN 2018

19. Tahira (IIU); “Fair Weather Atmospheric Electric Field Investigation at a Subtropical Station Balakot, Pakistan” (Thesis Submitted)
Alveena (Gomal Uni.); “Annual and Seasonal Variations of Surface Electric Field for Tarbela Station, Pakistan: A Study of Plausible Influences” (Thesis under write up)
Tabinnda (Air University); “ Variation of Fair-Weather Atmospheric Electric Field During Different Meteorological Parameters  for Multan and Islamabad ”

20. CONCLUSION
There is a strong positive correlation between the fair weather atmospheric electric field and temperature, while a strong negative correlation is seen between the fair weather atmospheric electric field and the atmospheric pressure, also the relative humidity
The seasonal variation shows that the values of atmospheric electric field in spring and winter are higher than in summer (monsoon) and autumn, which could be due to the systematic change in aerosol concentration and local variations of many factors.
The diurnal average curve of atmospheric electric field shows marked departure from the Carnegie curve, and is attributed to local effects that often mask the global signal.
Compared with other land-based stations, Islamabad clearly depicts a single morning peak and the difference of timings could be due to different latitude, climate, and meteorological parameters.

21. THANK YOU