"My message is clear: we must accelerate the process because there is still a lot of work to do," he told journalists on the sidelines of the UN conference in Paris' northern outskirts.
"Options for compromise need to be found as quickly as possible," he added.
"Heads of state and government on Monday gave us an unambiguous mandate, and we must succeed."
Since a high-profile opening by more than 150 world leaders on Monday, bureaucrats have been poring over a draft of the first pact to propose a global roster of carbon-curbing undertakings.
The marathon conference is scheduled to close at 6 pm (1700 GMT) on December 11 -- but the process is notorious for textual bickering and running over schedule.
Bureaucrats have been given an interim deadline of midday (1100 GMT) this Saturday to produce a blueprint, which will then be given to environment ministers to make the political decisions required for a deal.
A European negotiator earlier told AFP there was "growing frustration" with what he described as a "very slow" pace of work.
And Greenpeace campaigner Li Shuo, who has observer status in the talks, described the process as "quite messy", with negotiations in "contact groups, spinoff groups, informal informals, huddles".
UN climate chief Christiana Figueres cautioned against despair.
"The text of the agreement will go through ups and downs, there will be many commas inserted and commas removed because that is the nature of this. It is a legally binding text and needs to be reviewed very, very carefully," she said.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
