CO2 emissions have now risen for a second year, the study's authors say, after three years of little to no growth from 2014 to 2016. "Investment in electric vehicles needs to expand".
The U.N. chief chided countries, particularly those most responsible for greenhouse gas emissions, for failing to do enough to meet the goals of the Paris climate accord.
The findings, co-authored by a team of almost 80 scientists, were published in the journal Open Access Earth System Science Data.
Fluctuations in global emissions over the last five or six years have tracked changes in coal consumption, the study revealed.
The damage caused by coal, oil and gas pollution is "outrageous", she said.
Niwa atmosphere-ocean scientist Dr Sara Mikaloff-Fletcher said the world needed to be reducing emissions quite aggressively if it was to keep the temperature rise below 1.5C.
The uncertainty range for the 2.7% increase is 1.8 to 3.7%. And while countries are using more renewable fuels and trying to reduce carbon from electricity production, emissions from cars and planes are steadily increasing, Le Quere said.
Oil and gas use have grown nearly unabated over the last decade.
No tsunami threat to Australia following 7.6 magnitude quake
Tsunamis at minimal levels vary with slightly higher waves with minimal landfalls, and usually up to five minutes apart. The natural disaster - magnitude 7.6 - struck off the Pacific Ring of Fire territory on Wednesday.
Coal is likely to dominate the Chinese energy system for decades, even if the skyrocketing growth of the mid-2000s is unlikely to return, the researchers said.
For the US, it was a combination of a hot summer and cold winter that required more electricity use for heating and cooling.
He argued during a panel discussion that "this is evidenced by the results we have achieved in reducing emissions, in particular through increasing the forest cover and by supporting global climate negotiations".
USA emissions are expected to resume their downward trend in 2019 as cheap gas, wind and solar power continue to displace coal.
For example, in the European Union region, the amount of fuel used for flights and road transport has surged by 4% where it had been falling in previous years.
The Paris Agreement is potentially the strongest health agreement of this century, in not only addressing the health risks associated with climate change through mitigation and adaptation mechanisms, but also in helping ensure the attainment of the SDGs, which are integral to good health.
In India, emissions are expected to grow by a solid 6.3 per cent in 2018, pushed by strong economic growth of around 8 per cent per year.
"If this is the most important issue of our time, as leaders repeatedly say, then why aren't they acting accordingly - and showing up for the climate talks?", he said.