He developed equations for the calculation of past temperatures and rainfall using stable isotope ratios and prepared high resolution documentation of the monsoon changes during the Holocene epoch.

[10] Ramesh, a National Merit Certificate holder of Ministry of Education and Social Welfare in 1972, received the All India Bengali Literary Conference Medal in 1973.

[4] He was selected for the Jawaharlal Nehru Memorial Fund Fellowship in 1976 for his project on The Life and Work of Professor Sir C. V. Raman[17] and the Young Scientist Medal of the Indian National Science Academy reached him in 1987.

[7] The Intergovernmental Panel on Climate Change listed Ramesh as one of the scientists who contributed to reports of the IPCC, which was awarded the 2007 Nobel Peace Prize.

[4] The list of award orations and plenary speeches delivered by Ramesh includes the 2011 K. R. Ramanathan lecture of the Indian Geophysical Union[21] and the address on Oceanic nitrogen cycling: new results based on isotopic tracers of 2013 held at the K.R.