From NOAA
Increases in temperature, sea level and CO
2 observed; Southern Hemisphere warmth and Super Typhoon Haiyan among year’s most notable events
In 2013, the vast majority of worldwide climate
indicators—greenhouse gases, sea levels, global temperatures,
etc.—continued to reflect trends of a warmer planet, according to the
indicators assessed in the
State of the Climate in 2013 report, released online today by the American Meteorological Society.
Scientists from NOAA’s National Climatic Data Center in
Asheville, N.C., served as the lead editors of the report, which was
compiled by 425 scientists from 57 countries around the world (
highlights,
visuals,
full report).
It provides a detailed update on global climate indicators, notable
weather events, and other data collected by environmental monitoring
stations and instruments on air, land, sea, and ice.
“These findings reinforce what scientists for decades have
observed: that our planet is becoming a warmer place,” said NOAA
Administrator Kathryn Sullivan, Ph.D. “This report provides the
foundational information we need to develop tools and services for
communities, business, and nations to prepare for, and build resilience
to, the impacts of climate change.”
The report uses dozens of climate indicators to track
patterns, changes, and trends of the global climate system, including
greenhouse gases; temperatures throughout the atmosphere, ocean, and
land; cloud cover; sea level; ocean salinity; sea ice extent; and snow
cover.
These indicators often reflect many thousands of measurements
from multiple independent datasets.
The report also details cases of
unusual and extreme regional events, such as Super Typhoon Haiyan,
which devastated portions of Southeast Asia in November 2013.
Highlights:
Atmospheric carbon dioxide concentrations in parts per million for the past 800,000 years, with the 2013 annual average concentration as a dashed line.
The peaks and valleys in carbon dioxide levels follow the coming and going of ice ages (low CO2) and warmer interglacials (higher CO2).
Graph by NOAA Climate.gov, based on EPICA Dome C data (Lüthi, D., et al., 2008) provided by NOAA NCDC Paleoclimatology Program.
- Greenhouse gases continued to climb: Major greenhouse gas concentrations, including carbon dioxide (CO2), methane and nitrous oxide, continued to rise during 2013, once again reaching historic high values. Atmospheric CO2
concentrations increased by 2.8 ppm in 2013, reaching a global average
of 395.3 ppm for the year. At the Mauna Loa Observatory in Hawaii, the
daily concentration of CO2 exceeded 400 ppm on May 9 for
the first time since measurements began at the site in 1958. This
milestone follows observational sites in the Arctic that observed this
CO2 threshold of 400 ppm in spring 2012.
Surface temperatures in 2013 compared to the 1981-2010 average. NOAA map by Dan Pisut, NOAA Environmental Visualization Lab, based on Merged Land and Ocean Surface Temperature data from the National Climatic Data Center. Adapted from Plate 2.1(c) in State of the Climate in 2013.
- Warm temperature trends continued near the Earth’s surface:
Four major independent datasets show 2013 was among the warmest years
on record, ranking between second and sixth depending upon the dataset
used. In the Southern Hemisphere, Australia observed its warmest year on
record, while Argentina had its second warmest and New Zealand its
third warmest.
Annual sea surface temperature compared to the 1981-2010 average from a variety of sources. Despite year to year variability, all the years in the past decade have been warmer than average.
Sea surface temperature in 2013 compared to the 1981-2010 average.
The dark red and blue areas reveal areas of the global ocean that were up to 4º Fahrenheit warmer or cooler than average.
Map by Dan Pisut, based on NOAA OISST data. Adapted from Figure 3.1(a), in State of the Climate in 2013.
- Sea surface temperatures increased: Four
independent datasets indicate that the globally averaged sea surface
temperature for 2013 was among the 10 warmest on record. El Niño
Southern Oscillation (ENSO)-neutral conditions in the eastern central
Pacific Ocean and a negative Pacific decadal oscillation pattern in the
North Pacific. The North Pacific was record warm for 2013.
Global sea level from 1993 through 2013 compared to 1993-2012 average, based on AVISO data. Graph adapted from Plate 1.1, panel v, in State of the Climate in 2013.
The map shows where average sea level in 2013 was above or below its long-term average.
Places where sea level rose up to 8 inches higher than the 1993-2010 average are dark blue, average levels are white, and places where sea level fell below average are brown.
Map by NOAA Climate.gov, based on AVISO data provided by Mark Merrifield.
Adapted from Figure 3.28(a) in State of the Climate in 2013.
- Sea level continued to rise: Global mean
sea level continued to rise during 2013, on pace with a trend of 3.2 ±
0.4 mm per year over the past two decades.
Difference in ice extents for each year’s maximum (March, purple line) and minimum (September, blue line) relative to the 1981-2010 average.
Graph adapted from Figure 5.13 in State of the Climate in 2013.
Sea ice concentration in September 2013 compared to the median extent from 1981-2010 (gold line) and the 2012 record low (gray line).
Map by NOAA Climate.gov, based on data provided by the National Snow and Ice Data Center. Adapted from Figure 5.12(b) in State of the Climate in 2013.
- The Arctic continued to warm; sea ice extent remained low:
The Arctic observed its seventh warmest year since records began in
the early 20th century. Record high temperatures were measured at
20-meter depth at permafrost stations in Alaska. Arctic sea ice extent
was the sixth lowest since satellite observations began in 1979. All
seven lowest sea ice extents on record have occurred in the past seven
years.
- Antarctic sea ice extent reached record high for second year in a row; South Pole station set record high temperature:
The Antarctic maximum sea ice extent reached a record high of 7.56
million square miles on October 1. This is 0.7 percent higher than the
previous record high extent of 7.51 million square miles that occurred
in 2012 and 8.6 percent higher than the record low maximum sea ice
extent of 6.96 million square miles that occurred in 1986. Near the end
of the year, the South Pole had its highest annual temperature since
records began in 1957.
Tracks for the thousands of Eastern Hemisphere tropical cyclones documented in the International Best Track Archive for Climate Stewardship database for 1842-2012.
Rarely do storms form within ~5° of the equator.
Map by Dan Pisut, NOAA Environmental Visualization Lab.
- Tropical cyclones near average overall / Historic Super Typhoon:
The number of tropical cyclones during 2013 was slightly above
average, with a total of 94 storms, in comparison to the 1981-2010
average of 89. The North Atlantic Basin had its quietest season since
1994. However, in the Western North Pacific Basin, Super Typhoon Haiyan
– the deadliest cyclone of 2013 – had the highest wind speed ever
assigned to a tropical cyclone, with one-minute sustained winds
estimated to be 196 miles per hour.
State of the Climate in 2013 is the 24th edition in
a peer-reviewed series published annually as a special supplement to
the Bulletin of the American Meteorological Society.
The journal makes
the full report openly available
online.
"State of the Climate is vital to documenting the world's climate,"
said Dr. Keith Seitter, AMS Executive Director. "AMS members in all
parts of the world contribute to this NOAA-led effort to give the
public a detailed scientific snapshot of what's happening in our world
and builds on prior reports we've published."
NOAA’s mission is to understand and predict changes in the Earth's
environment, from the depths of the ocean to the surface of the sun,
and to conserve and manage our coastal and marine resources.
