[Vision2020] 7-3-2013 Report: World Meteorological Association: "2001-2010, A Decade of Climate Extremes"

[Ted Moffett]

http://www.wmo.int/pages/mediacentre/press_releases/pr_976_en.html

*2001-2010, A Decade of Climate Extremes*



*GENEVA 3 July 2013 - **The world experienced unprecedented high-impact
climate extremes during the 2001-2010 decade, which was the warmest since
the start of modern measurements in 1850 and continued an extended period
of pronounced global warming. More national temperature records were
reported broken than in any previous decade, according to a new report by
the World Meteorological Organization (WMO).*

**The report, *The Global Climate 2001-2010, A Decade of Climate
Extremes<http://library.wmo.int/opac/index.php?lvl=notice_display&id=15110>
*, analysed global and regional temperatures and precipitation, as well as
extreme events such as the heat waves in Europe and Russia, Hurricane
Katrina in the United States of America, Tropical Cyclone Nargis in
Myanmar, droughts in the Amazon Basin, Australia and East Africa and floods
in Pakistan.

The decade was the warmest for both hemispheres and for both land and ocean
surface temperatures. The record warmth was accompanied by a rapid decline
in Arctic sea ice, and accelerating loss of net mass from the Greenland and
Antarctic ice sheets and from the world’s glaciers. As a result of this
widespread melting and the thermal expansion of sea water, global mean sea
levels rose about 3 millimetres (mm) per year, about double the observed
20th century trend of 1.6 mm per year. Global sea level averaged over the
decade was about 20 cm higher than that of 1880, according to the report.

The WMO report charted rising atmospheric concentrations of greenhouse
gases. Global-average concentrations of carbon dioxide in the atmosphere
rose to 389 parts per million in 2010 (an increase of 39% since the start
of the industrial era in 1750), methane to 1808.0parts per billion (158%)
and nitrous oxide to 323.2 parts per billion (20%).

“A decade is the minimum possible timeframe for meaningful assessments of
climate change,” said WMO Secretary-General Michel Jarraud.  “WMO’s report
shows that global warming was significant from 1971 to 2010 and that the
decadal rate of increase between 1991-2000 and 2001-2010 was
unprecedented.  Rising concentrations of heat-trapping greenhouse gases are
changing our climate, with far reaching implications for our environment
and our oceans, which are absorbing both carbon dioxide and heat.”

“Natural climate variability, caused in part by interactions between our
atmosphere and oceans – as evidenced by El Niño and La Niña events - means
that some years are cooler than others. On an annual basis, the global
temperature curve is not a smooth one. On a long-term basis the underlying
trend is clearly in an upward direction, more so in recent times” said Mr
Jarraud.

Between 2001 and 2010, there was no major El Niño event, which normally
leads to higher temperatures (as occurred in the then-record warm year of
1998). Much of the decade experienced either cooling La Niña or neutral
conditions, except for the 2009/2010 moderate to strong El Niño.

The 100-page report and an executive summary, incorporating findings from a
unique survey of 139 National Meteorological and Hydrological Services and
socio-economic data and analysis from several UN agencies and partners,
were released to coincide with the first session of the Intergovernmental
Board on Climate Services. This Board is overseeing the implementation of
the Global Framework for Climate Services – an international initiative to
improve and expand scientifically-based climate information to help society
cope with the natural variability of our climate and human induced climate
change.

‘“A decadal perspective makes it possible to assess trends in the climate
system and anticipate the future. It can also inform efforts to develop
operational climate services that provide information and forecasts for
decision-making in agriculture, health, disaster risk, water resources and
other sectors. These efforts are being coordinated through the WMO-led
Global Framework for Climate Services,” said Mr Jarraud.

“Climate services are more necessary than ever to help us cope with global
changes in our climate, which are accentuated at regional and national
scales.  Despite the significant decrease in casualties due to severe
storms and flooding, the WMO report highlighted an alarming impact on
health and mortality rates caused by the European and Russian heat-waves.
Given that climate change is expected to lead to more frequent and intense
heat-waves, we need to be prepared,‘’  said Mr. Jarraud.

*Temperatures: *The average land and ocean-surface temperature for the
decade 2001-2010 was estimated to be 14.47°C, or 0.47°C above the 1961–1990
global average and +0.21°C above the 1991–2000 global average (with a
factor of uncertainty of ± 0.1°C).

The decadal rate of increase in the global temperature accelerated between
1971 and 2010. The global temperature increased at an average estimated
rate of 0.17°C per decade during that period, compared with 0.062°C per
decade for the entire 1880-2010 period. The average 2001-2010 decadal
temperature was 0.21°C warmer than 1991–2000, which in turn was +0.14°C
warmer than 1981-1990.

Every year of the decade except 2008 was among the 10 warmest years on
record. The warmest year ever recorded was 2010, with a temperature
estimated at 0.54°C above the 14.0°C long term average of 1961-1990 base
period, followed closely by 2005.

Above-average temperatures were observed over most parts of the globe in
2001-2010. This was particularly marked in the higher latitudes of the
northern hemisphere. Greenland recorded the largest decadal temperature
anomaly, at +1.71°C above the long-term average and with a temperature in
2010 of +3.2°C above average.  Africa experienced warmer than normal
conditions in every year of the decade.

Results from WMO’s survey showed that nearly 94% of reporting countries had
their warmest decade in 2001-2010 and no country reported a nationwide
average decadal temperature anomaly cooler than  the long term average.

Some 44% of countries in the survey reported nationwide hottest temperature
records in 2001-2010, compared to 24% in 1991-2000.  Coldest daily minimum
temperature absolute records showed an opposite pattern:  In 1961-1970,
nearly 32 % of the countries reported nationwide lowest minimum temperature
values. The percentage decreased to 11% in 2001-2010.

*Precipitation and floods: *The 2001-2010 decade was the second wettest
since 1901. Globally, 2010 was the wettest year since the start of
instrumental records.

Most parts of the globe had above-normal precipitation during the decade.
The eastern USA, northern and eastern Canada, and many parts of Europe and
central Asia were particularly wet.

According to the WMO survey, floods were the most frequently experienced
extreme events over the course of the decade. Eastern Europe was
particularly affected in 2001 and 2005, India in 2005, Africa in 2008, Asia
(notably Pakistan, where 2 000 people died and 20 million were affected) in
2010, and Australia, also in 2010.

Droughts affect more people than any other kind of natural hazards owing to
their large scale and long-lasting nature. The decade 2001–2010 saw
droughts occur in all parts of the world. Some of the highest-impact and
long-term droughts struck Australia (in 2002 and other years), East Africa
(2004 and 2005, resulting in widespread loss of life) and the Amazon Basin
(2010) with negative environmental impacts.

*Tropical cyclones: *Between 2001 and 2010, there were 511 tropical cyclone
related events which resulted in a total of nearly 170,000 persons reported
killed, over 250 million people reported affected and estimated economic
damages of US$ 380 billion.

According to the U.S. National Oceanic and Atmospheric Administration,
2001-2010 was the most active decade since 1855 in terms of tropical
cyclone activity in the North Atlantic Basin. An average of 15 named storms
per year was recorded, well above the long-term average of 12.

The North Indian Ocean saw the deadliest tropical cyclone recorded during
the decade, when Tropical Cyclone Nargis struck Myanmar in early May 2008.
More than 138 000 people were reported killed or missing, eight million
people were affected and thousands of homes were destroyed.

*Impacts: *During the decade 2001-2010, more than 370,000 people died as a
result of extreme weather and climate conditions, including heat waves,
cold spells, drought, storms and floods, according to the data provided by
the Centre for Research on the Epidemiology of Disasters (CRED). This was
20% higher than 1991-2000.  This increase is due mainly to the 2003 heat
wave in Europe and the 2010  in Russia which contributed to an increase of
more than 2000% in the global death toll from heat waves (from less than
6000 in 1991-2000 to 136 000 in 2001-2010).

On the other hand, there was a 16% decline in deaths due to storms and 43%
decline in deaths from floods, thanks mainly to better early warning
systems and increased preparedness and despite an increase in populations
in disaster-prone areas.

According to the 2011 Global Assessment Report, the average population
exposed to flooding every year increased by 114% globally between 1970 and
2010, a period in which the world’s population increased by 87% from 3.7
billion to 6.9 billion. The number of people exposed to severe storms
almost tripled in cyclone-prone areas, increasing by 192%, in the same
period.

Much research is being conducted into whether it is possible to attribute
individual extreme events to climate change rather than natural
variability. Scientists increasingly conclude that the likelihood of an
event such as the 2003 European heat wave was probably substantially
increased by rising global temperatures. It is therefore important to
develop this research to strengthen climate science and to use it to
improve climate services to help society adapt to climate change.



 Decadal global combined surface-air temperature over land and sea-surface
temperature (°C) obtained from the average over the three independent
datasets maintained by the HadCRU, NOAA-NCDCand NASA-GISS.The Horizontal
grey line indicates the long term average value ( 14°C).

 Impact of Extreme events during 2001-2010 compared with 1991-2000. Total
number of loss of lives



*Notes to Editors: Climate data and information used in this report was
provided by a number of international, regional and national institutions.
Most of the data on impacts caused by extreme events was provided by the
Centre for Research on the Epidemiology of Disasters. Details on data
sources, contributors and references are included in the full
report<http://library.wmo.int/opac/index.php?lvl=notice_display&id=15110>
*

Full report
<http://library.wmo.int/opac/index.php?lvl=notice_display&id=15112>

Brief video interview on the decadal climate
report<http://www.youtube.com/watch?v=qSz7U0C0bsY>



* **The World Meteorological Organization is the United Nations System’s
authoritative voice on Weather, Climate and Water** *

For more information, please contact:

Clare Nullis, Media Officer <cnullis%28at%29%20wmo.int>, Communications and
Public Affairs, Tel: +(41 22) 730 8478; 41-79) 7091397 (cell)

Website: www.wmo.int

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Vision2020 Post: Ted Moffett
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