Full coverage: Paris Climate Agreement

NAIROBI, April 15 (Xinhua) -- UN-appointed scientists will carry out a major survey of greenhouse gas stockpiles around the world and their impact, as part of the initial implementation of the 2015 Paris Climate Agreement, a top UN climate executive has said.

Intergovernmental Panel on Climate Change (IPCC) Chairman, Hoesung Lee, said late on Thursday that the scientific panel would seek to upgrade methods of carrying out the stocktaking in all countries as required under the Paris Agreement, a major step towards reducing the global warming.

Lee was speaking to reporters at the conclusion of the 43rd session of the IPCC held from April 11 to 13 in the Kenyan capital, Nairobi.

The IPCC has been assigned to provide a report on the impact of global warming by 2018.

In that report, the panel is expected to provide an assessment on the contributors to global warming and to propose a new set of national commitments.

Hoesung said at the opening of the Nairobi meeting that the Paris Agreement provided more ambitious targets of reducing the impact of global green house gas emissions.

"The IPCC is not a party to the convention, but we worked hard to ensure that the agreement is scientifically sound," he said.

The assessment report will focus on the impact of global warming of 1.5ºC above pre-industrial levels and related global greenhouse gas emission pathways.

Lee said the report is expected to provide a clearer picture on the contribution of the greenhouse gases to the global warming.

"We are also set to release another special report on issues around climate change and desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems," Lee said.

Hoesung said the IPCC has a road map for the next sixth assessment report, which will be released in stages finishing with a synthesis report in 2022.

The assessment reports aim to inform policymakers of what the scientific community knows about the mechanisms of climate change, its impacts and risks, and options for adaptation and mitigation.