This document contains the presentation by D. V. Borole, NIO Goa, on dynamics of trace gases at low level planetary boundary layer observed at Cabo de Rama, west coast of India, presented at National climate research conference, IIT Delhi, March 5-6, 2010. Atmospheric gases are considered to modulate the global climatic change, and thus an impetus is given to study these gases. Several international groups are beginning to collect, analyse the air samples from tropical as well as temperate regions for making the atmospheric transport models. Cabo de Rama, along the west coast of India, has been chosen to study the air circulation pattern and to assess the components of air as well as the influence of monsoon on the compositional variation by a tri-partite international collabaration project comprising of India (PRL Ahmedabad , NIO, Goa & IITM ,Pune), Australia (CSIRO, Melborne) and USA (NOAA, Colorado) funded by IAEA1 . Cabo de Rama represents the Indian Ocean region and considered free from industrial complexes that would contribute to degeneration of air. A time series data collected at monthly intervals has been generated to examine CO2, CH4, CO, N2O, H2 as well as the C and O isotopic composition of CO2 for a decade -( between 1993 and 2003). This data archived at the I. A. E. A. Vienna and subsequently published in scientific literature and the inferences drawn from this study form the basis of this presentation 2,3. The numerical / dynamical models examined by the members of this group surmise the observed dynamics of the trace gases at this low level of the planetary boundary layer and the results underline the need to examine the other components of air and adjoining water column for determining the major - advective / diffusive