Final figures for 2011's weather will be published by the WMO in March next year.
"Greenhouse gas concentrations have reached record levels despite the economic slowdown, " observed WMO secretary-general Michel Jarraud.
About 40% of the nitrous oxide emitted is from human activity, according to WMO estimates.
Other potent greenhouse gases such as methane also recorded new highs, according to the WMO report.
The World Meteorological Organization (WMO) is a specialized agency of the United Nations, with 189 members.
It makes up the data buoy component of the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology.
But natural carbon storage facilities like oceans and forests "will not necessarily continue in the future, " say the WMO.
Recently, the World Meteorological Organization (WMO) reported that greenhouse gases in the atmosphere hit a new record high in 2011.
The following morning, he had a working breakfast, which included a briefing by Michel Jarraud, Secretary-General of the World Meteorological Organization (WMO).
The DBCP was formed in 1985, as a joint body of the World Meteorological Organization (WMO) and Intergovernmental Oceanographic Commission (IOC) of UNESCO.
Rainfall during June to September's monsoon season in northern and central Thailand was up to 80% higher than the seasonal average, says the WMO.
The latest data from the WMO also shows that emissions of nitrous oxide are 20% higher than in the preindustrial era, and are accelerating.
The impact of these gases has been significant, says the WMO, causing a 30% increase of the warming effect on the climate between 1990 and 2011.
The WMO said levels of methane - considered the second most important greenhouse gas - had risen after a period of relative stabilisation from 1999 to 2006.
Around 60% of methane released into the atmosphere comes from human activities such as farming, rice agriculture, fossil fuel exploitation, landfill and biomass burning, according to the WMO.
Several programmes contribute to these efforts, including the Joint WMO-IOC Technical Commission for Oceanography and Marine Meteorology ( JCOMM) and the Ocean Observations Panel for Climate ( OOPC).
The WMO numbers follow the recent release of data from the US Oak Ridge National Laboratory, showing a huge surge in carbon dioxide emissions from 2009 to 2010.
The International Programme on Landsides (IPL) was jointly established by UNESCO, WMO, FAO, UNISDR, UNU, ICSU, WFEO and IUGS as well as ICL through the 2006 Tokyo Action Plan.
The side event is organized in cooperation with the World Meteorological Organisation (WMO), Fond Tara, the Government of Denmark , the Sandwatch Foundation and the UNESCO World Heritage Centre.
But such was their intensity -- Wajir, northeast Kenya received more rain in six weeks (402 millimeters) than the annual average -- it led to crop damage, says the WMO.
The WMO estimates that 375 billion tonnes of carbon have been released into the atmosphere since 1750, and that about half of that amount is still present in the atmosphere.
Richard Allan, from the Department of Meteorology at the UK's University of Reading, said the WMO's latest data confirmed the trend in the rate of rise reported in recent decades.
"We see the Weather Info for All initiative as a major pan-African effort to empower our 188 (nation) members to provide enhanced weather information and services, " said Michel Jarraud, WMO secretary-general.
April and May played host to one of the most active tornado seasons on record, according to the WMO, and the Mississippi River suffered its worst floods in nearly 80 years.
According to the WMO, about 375 billion tons of carbon has been released into the atmosphere since the industrial revolution began in 1750, with around half this amount being absorbed by carbon sinks.
The WMO data, meanwhile, confirms that atmospheric concentrations of the three gases principally responsible for the man-made component of the greenhouse effect - carbon dioxide, methane, and nitrous oxide - all rose during 2009.
"These billions of tonnes of additional carbon dioxide in our atmosphere will remain there for centuries, causing our planet to warm further and impacting on all aspects of life on Earth, " said WMO Secretary-General Michel Jarraud.
The WMO reported that the seasonal minimum, reached on September 9, was 35% below the 1979-2000 average and the second-lowest on record with both the Northwest and Northeast passages ice free for periods during the summer.
Summer temperatures in the Lone Star State averaged 30.4 degrees Celsius (86.7 degrees Fahrenheit) -- 3 degrees Celsius (5.4 degrees Fahrenheit) higher than the long-term average, according to the WMO and the highest-ever recorded in any American state.
Under WMO leadership, National Meteorological and Hydrological Services contribute substantially to the protection of life and property against natural disasters, to safeguarding the environment and to enhancing the economic and social well-being of all sectors of society in areas such as food security, water resources and transport.
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