Is 20 13-20 17 really the warmest five-year period in history?

Bonn165438+1October 6th, a report released by the World Meteorological Organization in Bonn on the 6th pointed out that the global average temperature from October to September was about 1. 1℃ higher than that in the pre-industrial era. Due to the strong El Nino event, 20 16 may still be the warmest year on record, while 20 17 and 20 15 ranked second and/or third respectively. The report points out that 20 13-20 17 will be the warmest five-year period on record.

The World Meteorological Organization (WMO) is the authoritative organization of the United Nations system on weather, climate and water. Petrie Talas, Secretary-General of the World Meteorological Organization, issued an interim statement on climate conditions at the United Nations Bonn Climate Conference, which opened on the same day. The statement pointed out that many "high-impact events" occurred in 20 17, including catastrophic hurricanes and floods harmful to health, heat waves and droughts, which may be one of the hottest three years on record. At the same time, the long-term indicators of climate change, such as rising carbon dioxide concentration, rising sea level and ocean acidification, have not declined. The coverage of Arctic sea ice is still below the average level, while the previously stable Antarctic sea ice range is at or near the lowest level in history.

"The past three years have been the highest in the temperature record. This is part of a long-term warming trend, "said Petrie Talas. "We have experienced abnormal weather, including temperatures as high as 50 degrees Celsius in Asia, record-breaking hurricanes extending to Ireland in the Caribbean and Atlantic Ocean, devastating monsoon floods affecting millions of people in East Africa, and persistent drought."

Petrie Taras emphasized that many of the above-mentioned events (the specific number will be determined by specific scientific research) have signs of human activities leading to the increase of greenhouse gas concentration and climate change.

Espinosa, executive secretary of the United Nations Framework Convention on Climate Change (UNFCCC), the organizer of the Bonn Climate Conference, said: "These findings highlight that if we fail to achieve the goals and ambitions of the Paris Agreement, it will bring more and more risks to people, economy and the nature of life on the earth where human activities are carried out."

Espinosa called on the Bonn Climate Conference to become "the launching pad for all countries and all walks of life to reach the next higher goal", "because we expect to eliminate future risks and maximize opportunities through a brand-new, forward-looking and sustainable development path".

The World Meteorological Organization points out that extreme events in the climate field affect the food security of millions of people, especially the most vulnerable groups. An assessment report of the Food and Agriculture Organization of the United Nations (FAO) found that in developing countries, agriculture (crops, livestock, fisheries, aquaculture and forestry) accounts for 26% of all damages and losses related to large and medium-sized storms, floods and droughts.