Science and Technology

MoES launches Winter Fog Experiment 2016-17

The Union Ministry of Earth Sciences (MoES) has launched Winter Fog Experiment (WIFEX 2016-17) to study presence of extended periods of fog in northern parts of the country. It is an intensive ground-based measurement to understand different physical and chemical features of Fog will be conducted at Indira Gandhi International Airport (IGIA), Delhi.

Issues related to Fog:
Fog is a visible mass consisting of cloud water droplets suspended in the air or near the Earth’s surface. The presence of heavy and extended period fog in the northern regions of India is one of the major weather hazards, impacting aviation, road transportation, economy and public life in the world’s most densely populated region. Maximum fog occurrence over the Northwest India is about 48 days (visibility < 1000m) per year, and occurs mostly during the December-February time period.
All India annual morning poor visibility days (PVD <4 km) has increased from 6.7 to 27.3 % days.

Objectives of the Winter Fog Experiment (WIFEX):

The objectives of the Winter Fog Experiment (WIFEX) are to develop better now-casting (next 6 hours) and forecasting of winter fog on various time and spatial scales, and help reduce its adverse impact on aviation, transportation and economy, and loss of human life due to accidents.

In an effort to gain insight into these questions, the Ministry of Earth Sciences (MoES), Government of India has taken up a multi-institutional initiative to conduct an intensive ground-based measurement campaign at the Indira Gandhi International Airport (IGIA), Delhi, to understand different physical and chemical features of Fog and factors responsible for its genesis, intensity and duration.