Posts Tagged ‘World Meteorological Organization’
The World Meteorological Organization has said that the amount of greenhouse gases in the atmosphere reached a new record high in 2011. Between 1990 and 2011 there was a 30% increase in what the climate scientists call “radiative forcing” – the warming effect on our climate – because of carbon dioxide (CO2) and other heat-trapping long-lived gases.
Since the start of the industrial era in 1750, according to the WMO’s 2011 Greenhouse Gas Bulletin, about 375 billion tonnes of carbon have been released into the atmosphere as CO2, most of this from fossil fuel combustion.
Our stifling (and that of the flora and fauna with which we share our Earth, and who are victims as much as we are) is taking place because about half of this CO2 remains in the atmosphere (the rest gets absorbed by the oceans and biospheres, usually forests – which are being cut down at a fearsome rate – around the world).
Do they learn and listen? Not at all, as this report in The Guardian has just explained. More than 1,000 coal-fired power plants are being planned worldwide, new research by the World Resources Institute has revealed. The huge planned expansion comes despite warnings – such as this one from the WMO – that the planet’s fast-rising carbon emissions must peak within a few years if runaway climate change is to be avoided. Coal plants are the most polluting of all power stations and the World Resources Institute identified 1,200 coal plants in planning across 59 countries, with about three-quarters in China and India. The capacity of the new plants add up to 1,400GW to global greenhouse gas emissions. India is planning 455 new plants compared to 363 in China.
“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. “Future emissions will only compound the situation.”
This eighth WMO-Global Atmosphere Watch (GAW) Annual Bulletin reports on the atmospheric burdens and rates of change of the most important long-lived greenhouse gases (very unhelpfully acronymed as ‘LLGHGs’, which is rivalled perhaps in unwieldiness by ‘LULUCF’). These are carbon dioxide, methane, nitrous oxide, CFC-12 and CFC-11.
The three greenhouse gases we are most familiar with – carbon dioxide (CO2), methane (CH4)and nitrous oxide (N2O) – are closely linked to anthropogenic activities, and interact strongly with the biosphere and the oceans.
Predicting the evolution of the atmospheric content of greenhouse gases requires an understanding of their many sources, sinks and chemical transformations in the atmosphere. There we are helped by the NOAA’s (the USA’s National Oceanic and Atmospheric Administration) Annual Greenhouse Gas Index – in 2011 this index was 1.30, representing an increase in total radiative forcing by all long-lived greenhouse gases of 30% since 1990 and of 1.2% from 2010 to 2011. Read that again – more than one per cent from 2010 to 2011! What do the G20 governments and multinationals do not understand by these numbers? Are we to believe that the same people who design complex financial derivatives don’t get climate change math?
In July 2011, the US National National Oceanic and Atmospheric Administration‘s (NOAA) National Climatic Data Center updated the Climate Normals for the USA.These are three-decade averages of weather observations, including temperature. The new annual normal temperatures for the United States reflect a warming world.
Following procedures set by the World Meteorological Organization, normals shift each decade, rather than each year. As of July 2011, the climate normals span 1981–2010, dropping the 1970s, which were unusually cool. Last year, the normals included 1971–2000, leaving out the warmest decade on record (2001–2010).
NASA’s Earth Observatory has provided maps which show the differences between the old normals and the new normals. The top image shows July maximum temperatures, and the lower image shows the January minimum temperatures.
Positive temperature changes appear in orange and red, and negative temperature changes appear in blue.
On average, the contiguous United States experiences the lowest temperatures on January nights, and the highest temperatures on July days. Both January minimum temperatures and July maximum temperatures changed, but not by equal amounts.
Parts of the Great Plains, Mississippi Valley, and the Northeast experienced slightly cooler July maximums from 1981–2010 compared to 1971–2000 (top map).
A much more striking difference, however, appears in the January minimums (lower map). Nighttime temperatures in January were higher everywhere except the Southeast. Warmer nights were especially pronounced in the northern plains through the northern Rocky Mountains—several degrees warmer in some places.
Comparing average temperatures year round, every state experienced warmer temperatures in 1981–2010 compared to 1971–2000.
NOAA’s National Climatic Data Center (NCDC) released the 1981-2010 Normals on July 1, 2011. Climate Normals are the latest three-decade averages of climatological variables, including temperature and precipitation. This new product replaces the 1971-2000 Normals product. Additional Normals products; such as frost/freeze dates, growing degree days, population-weighting heating and cooling degree days, and climate division and gridded normals; will be provided in a supplemental release by the end of 2011.
Although warmer temperatures can have benefits, they pose hazards to some plants. For instance, higher nighttime temperatures enable some pests—such as the pine bark beetle and wooly adelgid—to thrive in places where they previously froze.
What are Normals? – In the strictest sense, a “normal” of a particular variable (e.g., temperature) is defined as the 30-year average. For example, the minimum temperature normal in January for a station in Chicago, Illinois, would be computed by taking the average of the 30 January values of monthly-averaged minimum temperatures from 1981 to 2010. Each of the 30 monthly values was in turn derived from averaging the daily observations of minimum temperature for the station. In practice, however, much more goes into NCDC’s Normals product than simple 30-year averages. Procedures are put in place to deal with missing and suspect data values. In addition, Normals include quantities other than averages such as degree days, probabilities, standard deviations, etc. Normals are a large suite of data products that provide users with many tools to understand typical climate conditions for thousands of locations across the United States.
What are Normals used for? – Meteorologists and climatologists regularly use Normals for placing recent climate conditions into a historical context. NOAA’s Normals are commonly seen on local weather news segments for comparisons with the day’s weather conditions. In addition to weather and climate comparisons, Normals are utilized in seemingly countless applications across a variety of sectors. These include: regulation of power companies, energy load forecasting, crop selection and planting times, construction planning, building design, and many others.
The National Climatic Data Center compiles climate normals from observations from thousands of stations in the National Weather Service (NWS) Cooperative Observer Program, as well as stations staffed by professionals within the NWS, the National Oceanic and Atmospheric Administration (NOAA), and the Federal Aviation Administration.