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Posts Tagged ‘WMO

Arctic report card 2012

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The World Meteorological Organisation (WMO) has emphasised the “dramatic impact of persistent warming in the Arctic”, a region that many earth science institutes and networks have said witnessed numerous record-setting melting events in 2012.

The introduction to the ‘report card’ itself – this is run by the USA’s National Oceanic and Atmospheric Administration (NOAA) through its Climate Program Office, Arctic Research Program – said that the Arctic region continued to break records in 2012. Among these records broken is the loss of summer sea ice, spring snow cover, and melting of the Greenland ice sheet. “This was true even though air temperatures in the Arctic were unremarkable relative to the last decade.” said the Arctic Report Card 2012.

The report has mentioned with particular concern:

1. Record low snow extent and low sea ice extent occurred in June and September, respectively.
2. Growing season length is increasing along with tundra greenness and above-ground biomass. Below the tundra, record high permafrost temperatures occurred in northernmost Alaska.
3. Duration of melting was the longest observed yet on the Greenland ice sheet, and a rare, nearly ice sheet-wide melt event occurred in July.
4. Massive phytoplankton blooms below summer sea ice suggest previous estimates of ocean primary productivity might be ten times too low.
5. Arctic fox is close to extinction in Fennoscandia and vulnerable to further changes in the lemming cycle and the encroaching Red fox.
6. Severe weather events included extreme cold and snowfall in Eurasia, and two major storms with deep central pressure and strong winds offshore of western and northern Alaska.


Written by makanaka

January 6, 2013 at 21:11

We are stifled by growth greed, our air reeks of carbon dioxide

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An image from the Atlas of Health and Climate, a joint publication by the World Meteorological Organization and the World Health Organization: “Human health is profoundly affected by weather and climate. Extreme weather events kill tens of thousands of people every year and undermine the physical and psychological health of millions. Droughts directly affect nutrition and the incidence of diseases associated with malnutrition. Floods and cyclones can trigger outbreaks of infectious diseases and damage hospitals and other health infrastructure, overwhelming health services just when they are needed most.”

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.

Radiative forcing, relative to 1750, of all the long-lived greenhouse gases. The NOAA Annual Greenhouse Gas Index (AGGI), which is indexed to 1 for the year 1990, is shown on the right axis. Chart: NOAA ESRL Global Monitoring Division

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 Indexin 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?

Written by makanaka

November 21, 2012 at 21:02

USA climate, the newer, higher, normals

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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.

July Maximums, 1981–2010 compared to 1971–2000 image

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.

January Minimums, 1981–2010 compared to 1971–2000 image

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.

Big dry in Europe, big dry in USA

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This image, made with data collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite, reveals high temperatures that contributed to hazardous fire conditions. Image: NASA's Earth Observatory

An afterword about the drought conditions in the USA, centering on the state of Texas, and analysis from the USDA and the World Meteorological Organisation on the extremely dry conditions over northern Europe. This is May 2011 and keeping in mind what happened last year in Russia and Central Asia, we’re going to watch the big crop-growing areas very carefully over the next few weeks.

NASA’s Earth Observatory has said ‘Drought and Heat Create Hazardous Fire Conditions in Texas’ – So far in 2011, more than 1.4 million acres have burned in Texas, a result of some 800 fires. Why is fire activity so extreme in Texas this year? This image reveals high temperatures that contributed to hazardous fire conditions.

Fire needs dry fuel to burn, and weather conditions in March and April turned Texas into a tinderbox. The state began the winter dry season with abundant vegetation, following a moist spring in 2010. But then drought settled over the state in late 2010 and early 2011, culminating in the driest March on record. Many areas received less than 5 percent of their normal rainfall, according to the state climatologist.

In addition to being dry, March and April were warmer than normal. The image shows ground temperatures for April 7 to April 14 compared to long-term average for the week. The red tones indicate that most of Texas was much warmer than average, further drying out the abundant grasses, shrubs, and trees already suffering from a lack of rain.

In its latest World Agricultural Production report (2011 May) the United States Department of Agriculture (USDA), Foreign Agricultural Service has said that the European Union’s (EU) primary wheat and rapeseed region is struggling with dryness. “Dryness prevailed in northern Europe during March and April and continues into May, with far-below-normal precipitation levels and much-above-average temperatures. The high temperatures accelerated plant development so that crops are two to three weeks ahead of normal.”

Dry/drought conditions in Europe. Image: WMO

The report said that dryness is reportedly also interfering with fertilizer uptake by the crops. Both wheat and rapeseed crops need rainfall soon to prevent sharp yield reductions in northern France, northern Germany, England, and western Poland. These affected areas comprise a large portion of the EU’s primary wheat and rapeseed belt.

Planting conditions were generally favorable for EU winter wheat and rapeseed crops last autumn, with adequate soil moisture across most countries, including France and the United Kingdom. In some areas of central Europe however, (including Germany, Hungary, and Romania), rain and wet soils impeded planting, and some fields were likely left unplanted to be sown later with spring crops. Overall, the EU’s winter was rather mild despite one period during late February when minimum temperatures dropped to between minus 15 and minus 20 degrees Celsius for several days in snow-free areas of eastern Germany and western Poland.

The World Meteorological Union, for all its heavyweight authority, has only a couple of paras about the drought conditions in Europe 2011. “A long-lasting dry period persists over large parts of Europe since January 2011. According to data of the Global Precipitation Climatology Centre (GPCC), especially the months February to April 2011 had a considerable rain deficit over large parts of Europe. The 3-month totals over this period ranged between 40 and 80% of the long-term mean 1951-2000 over large areas (see figure below), in many parts of central Europe even below 40%.”

The United Kingdom had extremely dry conditions in March and April, said the WMO, especially in its southeastern parts and experienced its driest March since 1953. The other parts of western and central Europe all had a dry February, March and April. 2011 was up to now one of the driest 10 years in nearly whole Switzerland since 1864. April 2011 was one of the 10 driest April months in Germany since 1881, in continuation of similarly dry April months in 2007, 2009 and 2010. Also the preceding winter 2010/11 was very dry at least in western Europe, causing a very low soil moisture during March and April.

Written by makanaka

May 12, 2011 at 20:42