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2000s: hottest decade on record; dangerous blizzard pounds Midwest

By: Dr. Jeff Masters, 3:33 PM GMT on December 09, 2009

The end of the decade is upon us, and this decade was the warmest decade on record, according to NOAA and the World Meteorological Organization (WMO). The decade of the 2000s was 0.17°C (0.31°F) warmer than the 1990s, according to NOAA. The "official" scientific assessments on climate change, the IPCC reports, have been predicting that Earth's temperature rise should average about 0.19°C per decade, due to human-caused global warming. Thus, the warming over the past decade is about 10% below predictions--well within the uncertainties that natural variation in the climate can bring. Of course, one can look at shorter time periods and say that no warming is occurring. The hottest year on record globally was 1998, according to the UK's HadCRUT3 data set, and was 2005, according to the data sets maintained by NASA and NOAA. It is apparent from the plot of global temperature anomalies (Figure 1) that the global temperature rise has flattened out since 2005. One can correctly say that global temperatures have not increased since 2005. However, climate is measured on time scales of decades, so it is incorrect to say that the climate has not warmed since 2005. It is meaningless to any statement about climate on any time scale less than ten years. Thirty years is better, since the atmosphere has natural multi-decadal oscillations, and the solar cycle of 11 years is also important. Global average temperature oscillates 0.1°C between the maximum and minimum of the solar cycle, and we are currently in an unusually long minimum.


Figure 1. Change in global surface temperature anomaly as computed by NOAA (NCDC Dataset), NASA (GISS data set) and combined Hadley Center and Climate Research Unit of the University of East Anglia (UK) (HadCRUT3 data set). Uncertainty in the HadCRUT3 data is shown in gray. Image credit: WMO.

Mass front-page climate change editorial published in 45 countries
An unprecedented joint editorial urging action on climate change appeared in 56 newspapers in 45 countries yesterday. Many of the papers carried the editorial on the front page. The editorial began: "Unless we combine to take decisive action, climate change will ravage our planet, and with it our prosperity and security. The dangers have been becoming apparent for a generation. Now the facts have started to speak: 11 of the past 14 years have been the warmest on record, the Arctic ice-cap is melting and last year's inflamed oil and food prices provide a foretaste of future havoc. In scientific journals the question is no longer whether humans are to blame, but how little time we have got left to limit the damage. Yet so far the world's response has been feeble and half-hearted.". According to Editor & Publisher, the editorial was published in 20 languages including Chinese, Arabic and Russian. The text was drafted by the UK newspaper, The Guardian, in conjunction with editors from more than 20 of the papers involved. A number of U.S. papers supported the project and agreed with everything in the editorial, but only one--the Miami Herald--was brave enough to publish it.

Posts on the hacked climate scientists' emails
If you haven't read my posts on the hacked email affair, my attitude on the matter can best be summed up by a highly amusing political cartoon by Houston Chronicle cartoonist Nick Anderson. While an investigation is needed into whether the scientific data involved was properly withheld from other scientists, there is nothing in the hacked emails that affects the validity of any of the published peer-reviewed science on climate change. "Climategate" is a manufactured scandal designed to take attention away from the scientific consensus that human-caused global warming is responsible for most of the observed warming in recent decades, and that this warming will increase dramatically in coming decades. My posts on the affair:

Don't shoot the messenger
Embattled UK climate scientist steps down
The Manufactured Doubt industry and the hacked email controversy
Is more CO2 beneficial for Earth's ecosystems?

Ricky Rood in Copenhagen
Our Climate Change expert, Dr. Ricky Rood, is in Copenhagen for the COP15 climate change summit. Check out his blog over the next two weeks to hear an insider's view of what's going on.

Major winter storm blasts the Plains and Western U.S.
It's a bad day to be in Iowa, unless you happen to be a polar bear. I'll back up that startling claim with some hard data: at 4:35 am CST, Carroll, Iowa reported heavy snow, sustained winds of 38 mph, gusting to 48, visibility 350 yards, a temperature of 9°F, and a windchill of -17°F. The mighty storm responsible was centered over Lake Michigan this morning, and is bringing blizzard conditions to Iowa, Minnesota, Wisconsin, and northern Michigan. The storm has brought very high winds to large portion of the country. Sustained winds of 53 mph, gusting to 77 mph were reported in Ruidiso, New Mexico yesterday afternoon, and hurricane-force wind gusts were reported in Arizona, New Mexico, and Texas yesterday. A peak gust of 105 mph was reported in Texas' Guadeloupe Mountains. Heavy rain from the storm has also brought localized flooding to California, Arizona, and Louisiana.

Some snow amounts from the storm so far (with distances in miles from the city included, where appropriate):

...ARIZONA...
FLAGSTAFF 7.8 SSW 30.4
JACOB LAKE 24.0
WILLIAMS 0.4 SW 20.0
GRAND CANYON SOUTH RIM 18.0

...CALIFORNIA...
KIRKWOOD SKI AREA 48.0
ALPINE MEADOWS 45.0
SODA SPRINGS 40.0
KINGVALE 1.3 WSW 37.0
NORTHSTAR 36.0
CISCO 5 ENE 35.0
SOUTH LAKE TAHOE 8 SSW 31.0
MAMMOTH LAKES 14.0

...COLORADO...
PAGOSA SPRINGS 9.1 NNW 33.0
CARBONDALE 8.2 S 24.8
CRESTED BUTTE 6.2 N 24.5
DURANGO 24.0
BAYFIELD 7 N 23.5
DOLORES 22 NE 23.0
GREELEY 2.3 SE 22.0
PAGOSA SPRINGS 3 SE 22.0

...IDAHO...
WESTON 4.0
POCATELLO AIRPORT 3.7
BOISE 6.7 SE 3.5

...KANSAS...
MARYSVILLE 14.0
LINCOLN 5 NE 12.0
CONCORDIA 5 SSE 11.0
HAYS 13 WNW 9.0
SALINA 8.0
ABILENE 5 SSW 7.0
MANHATTAN 7.0

...NEBRASKA...
TECUMSEH 13.5
ORD 12.0
OMAHA 3 N 8.6
KEARNEY 8.0
INDIANOLA 6.0

...NEW MEXICO...
LAS VEGAS 8.4 NW 8.0
SANTA FE 3.3 NE 5.5
TAOS PUEBLO 2.8 NW 5.2
GALLUP 8.1 NNW 4.8

...NEVADA...
HEAVENLY VALLEY 34.0
MT ROSE SKI AREA 23.0
CARSON CITY 1.3 NW 18.0
RENO 7.1 N 13.7
SUN VALLEY 0.9 N 10.5

...SOUTH DAKOTA...
SIOUX FALLS 6.0

...UTAH...
VERDUE 8 WNW 25.0
SPRINGDELL 23.0
ORDERVILLE 19.0
SPRINGVILLE 10.0

...WYOMING...
SAND LAKE 11.0
DIVIDE PEAK 9.0
LARAMIE 27.3 WSW 6.0
CHEYENNE 26.7 NE 4.3

Next post
I'll have a new post Thursday; there's a lot going on.

Jeff Masters
Snow in Angels Camp.
Snow in Angels Camp.
Woke up this morning to snow. We don't get snow in Angels Camp very often. It made for some difficult driving.
Frost
Frost
More frost on our car. This photo wasn't cropped or edited.

Climate Change

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