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Medieval Warm Period was real, global, & warmer than the present' [Copy link] 中文

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Post time 2013-3-9 07:32:49 |Display all floors
This post was edited by sansukong at 2013-3-9 06:49

Part: 1 of 3 'More than 700 scientists from 400 institutions in 40 countries have contributed peer-reviewed papers providing evidence that the Medieval Warm Period was real, global, & warmer than the present'

Climate Depot's Medieval Warm Period Round Up of Studies

Friday, March 08, 2013By Marc Morano  –  Climate Depot


Global warming activists and media outlets are hyping a new study published in Science that claims the Earth is experiencing unprecendted temperatures. See: New York Times: Global Temperatures Highest in 4,000 Years & Associated Press: HEAT SPIKE UNLIKE ANYTHING IN 11,000 YEARS

But the new study is counter to a preponderance of existing peer-reviewed studies showing the Medeiveal Warm Period adn the Roman Warming were both as warm or warmer than today without benefit of modern emissions or SUVs.

Penn State Professor Michael Mann has made similar claims of modern temperatires being the warmest, but such "Hockey Stick" temperature claims have been demolished in the scientific literature.

The latest research clearly reveals that the Medieval Warm Period (used to be referred to as the Medieval Climate Optimum) has been verified and was in fact global, not just confined to the Northern Hemisphere.

The Center for the Study of Carbon Dioxide and Global Change reported in 2009 that the “Medieval Warm Period was: (1) global in extent, (2) at least as warm as, but likely even warmer than, the Current Warm Period, and (3) of a duration significantly longer than that of the Current Warm Period to date.”



In addition, The Science and Public Policy Institute reported in May 2009: “More than 700 scientists from 400 institutions in 40 countries have contributed peer-reviewed papers providing evidence that the Medieval Warm Period (MWP) was real, global, and warmer than the present. And the numbers grow largerdaily.”

Climate Depot has assembled a small sampling of peer-reviewed studies, data and analyses that refute Michael Mann's Hockey Stick temperature claims of unprecedented 20th century warmth.

See: Evidence of Prior Unprecedented Global Warming Discovered In Scotland, Medieval Period Low CO2 Levels Likely At Fault

Medieval Warm Period found in 120 proxies. Plus Roman era was similar to early 20th Century -- 'Climate models cannot explain what caused warming 1000 years ago, nor cooling 300 years ago, so they can't rule out the same factors aren't changing the climate today (though they claim they can). If climate models can't explain the past, they can't predict the future'

Danish Meteorological Institute Scientist Issues Another takedown of UN & Michael Mann's 'Hockey Stick' -- 'We cannot from these reconstructions conclude that the previous 50-year period has been unique in the context of the last 500-1000 years'

Paper finds Medieval Warm Period in Arctic was much warmer than the present -- 'A paper published in Polar Research finds that temps at two sites in Arctic were much warmer than at the end of 20th century. At one site, Longyearbyen, the11-year running-mean peak winter temperature was a remarkable 9C warmer than at the end of the record in 2000. At the 2nd site, Vardo, the11-year running-mean peak winter temperature was about 3.3C warmer than at the end of the record in 2000'

New paper finds Medieval Warming Period was ~1°C warmer than current -- 'A new paper published in Palaeogeography, Palaeoclimatology, Palaeoecology finds that the Medieval Warming Period 'was warmer than the late 20th century by ~1°C.'

Paper finds Medieval Warm Period in Arctic was much warmer than the present -- 'A paper published in Polar Research finds that temps at two sites in Arctic were much warmer than at the end of 20th century. At one site, Longyearbyen, the11-year running-mean peak winter temperature was a remarkable 9C warmer than at the end of the record in 2000. At the 2nd site, Vardo, the11-year running-mean peak winter temperature was about 3.3C warmer than at the end of the record in 2000'Earth was warmer in Roman and Medieval Times say German researchers -- 'While CBS touts a 'groundbreaking' government report linking extreme weather and climate change, German researchers find 2,000 years of cooling and warmer temps in medieval times and the Roman era'UK Daily Mail: Tree-ring study proves that climate was WARMER in Roman and Medieval times than it is in the modern industrial age -- 'Rings in fossilised pine trees have proven that the world was much warmer than previously thought -with measurements dating back to 138BC - Tree-rings prove climate was WARMER in Roman and Medieval times than it is now -and world has been cooling for 2,000 years'New Study reveals 'trees make a Hockey Stick snap'Evidence of Prior Unprecedented Global Warming Discovered In Scotland, Medieval Period Low CO2 Levels Likely At FaultNew Peer-Reviewed Study: Climate was HOTTER in Roman, medieval times than now -- UN IPCC has got it all wrong, say scientists -- Published in hefty climate journal Nature Climate Change, the cooling effect of orbital shifting on the climate has been up to four times as powerful as anthropogenic (human-caused) warming pressures'Medieval Warming Exceeds Modern Warming, Per New Research Using 120 Proxies -- 'Those inconvenient global warming science facts that climate doomsday pundits hate - another major study determines Medieval Warming hotter than Modern Warming'
To be continued ........




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Post time 2013-3-9 07:42:26 |Display all floors

Part: 2 of 3



New EU Study Confirms Modern 'Unprecedented' -- 'Warming Is a Bogus Claim New research documents that the Roman and Medieval Periods were warmer than the modern era across Northern Europe, plus establishes that a slight cooling trend exists - the inconvenient global warming science facts'


New Paper Shows European Alps Were Just As Warm 900 Years Ago, Strong Natural Variations --Another peer-reviewed paper,another smashed hockey stick -- 'The results show that summer temperatures of the last millennium are characterized by two warm periods (AD 1053–1171 and 1823–1996) and two cold phases (AD 1172–1379 and 1573–1822)...'Highest pre-industrial summer temperatures of the 12th century were 0.3 °C warmer than the 20th century mean but 0.35 °C colder than proxy derived temperatures at the end of the 20th century'

Another hockey stick snaps! Southern Hemisphere Hockey Stick Goes Belly Up: ' The journal has been contacted and the publication of the study has been put on hold'

'...unfortunate data processing issue, it is likely to have implications for the results reported in the study...The problems with the paper in a nutshell: 1.upside down proxy data again 2.preselection of data, ignoring the whole set in many cases 3.though they tried to justify preselection, the paper's methodology doesn't hold up (circular reasoning) 4.inability to replicate given the data and methods used'

Medieval Warm Period & Little Ice Age Show Up In S. America Too: 'Yet another new study adds more to growing mountain of evidence that Medieval Warm Period was indeed a global phenomenon' -- The authors did an analysis of pollen and charcoal from Laguna San Pedro,a small closed-basin lake located in the Andes of Chile'

UN IPCC Claim: 'New paleo records from Australasia provide evidence of MCA warming around 1250–1330' -- Not only are the 'new' Gergis proxies not new; they were prominently displayed in the AR4 section on SH proxies

Law Dome in Mann et al 2008

Antarctica Global Warming: Advanced Science Methods Establish That Medieval Period Was Warmer -- 'With constant frigid temperatures, the idea of modern Antarctica 'global warming' that is 'unprecedented' seems rather ludicrous -indeed it is ludicrous, as latest research again confirms Medieval Warming Period was hotter'

New paper confirms Little Ice Age was a global phenomenon, related to solar activity -- Paper published in Geophysical Research Letters confirms that 'the Little Ice Age was a global event, probably caused by a change in solar [activity] and volcanic forcing [activity], and was not simply a seesaw-type redistribution of heat between the hemispheres as would be predicted by some ocean-circulation hypotheses'

New Paper: Earth heated up in Medieval times without human CO2 emissions -- 'Warming was global and NOT limited to Europe'-- 'Study throws doubt on orthodoxies around 'global warming' -- It then cooled down naturally & there was even a 'mini ice age'. A team of scientists led by geochemist Zunli Lu from Syracuse U. in NY state, has found that contrary to the 'consensus', the 'Medieval Warm Period' wasn't just confined to Europe...it extended all the way down to Antarctica –which means that Earth has already experience global warming without aid of human CO2 emissions'

Michael Mann's Hockey Stick Takes Another Huge Hit: South America's Hot Medieval Temperatures -- New research determines that South America did experience the Medieval Warming and temperatures were higher during MWP, contrary to Michael Mann's hockey stick "science

Chinese Study Confirms MWP and LIA: 'During the last 2000 years there have been swings in temperatures of between 2C and 3C' -- 'Colder intervals occurred around 100 BC, 400 AD, 1200 AD and 1700 AD. -- 'Warmer intervals occurred around 200 AD and 900 AD' -- 'The 20thC warming is of a smaller magnitude than the MWP'

Deja Vu '72? 'Dr. Lamb was also the source of the paleoclimate graph used in the 1990 & 1995 IPCC reports which shows an inconvenient hotter Medieval Warming Period than the present' -- 'The following IPCC report threw away Dr. Lamb's graph in favor of Michael Mann's hockey stick graph, which served to eliminate the Medieval Warming Period. This was the purpose of Mann's hockey stick, as stated in the climategate emails, to eliminate or "contain the MWP" according to Mann'German 2000-Year Peat Bog Temperature Reconstruction Shows Strong Central European Variations -- 'Yet another temperature reconstruction out there showing once again Michael Mann was wrong'German Peat Bog Study Verifies Extreme Warm Temperatures of Medieval Period - Modern Warming LessPeer Reviewed Study Establishes Unprecedented Medieval Warming On Tropical Island In Southern HemisphereNew paper finds temperatures and precipitation were higher 1000 years ago -- 'The paper finds higher temps & precipitation were present during Medieval Warming Period (960-1100 AD) than at the end of 20th century. This paper adds to published work of 986 scientists who have documented that Medieval Warming Period was as hot or hotter than present and was a global phenomenon. This study also shows both the rate and magnitude of the rise in temps from the year ~ 700-880 AD was much greater than over a comparable period including 20th century'
To be continued ...........





















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Post time 2013-3-9 07:44:02 |Display all floors

Part: 3 of 3


Chinese Research Discovers There Was Historical 'Unprecedented Warming' Before There Was Modern 'Unprecedented Warming'

Unprecedented Warming Strikes New York, Prior To Modern CO2 Levels: New Study Finds Medieval Period Warmer

New Research From Alaska Determines That Modern Global Warming Is Well Below Past Warming Periods

Study: 'Evidence from 180 proxy records of widespread N. Hemisphere warmth in 9th to 11th centuries...indicates that warmth in 10th & 11th centuries was as uniform as current 20th century warming'

Watch Now: Geologist Dr. Don Easterbrook slaps down Michael Mann: There are '1900 papers in the geologic record' about the Medieval Warm Period and the Little Ice Age

New Northern Hemisphere Research: 30 Datasets Prove Roman/Medieval Warmings Hotter Than Current Temps

Temp Reconstruction Clearly Shows Medieval Warm Period (MWP) and Little Ice Age: Roman Warm Period and MWP 'were both warmer than 1961-1990'

New Swiss Evidence Proves Modern Warming Cooler Than Medieval Warming Period, Study Finds

Peer-Reviewed Cherry Blossom Reseach Confirms Japan's Medieval Climate Warmer Than Current One

'The Case for a Global Medieval Warm Period Grows Ever Stronger'

Chinese Peer-Reveiwed Study Provides Overwhelming Evidence That UN IPCC Is Wrong: Medieval Warming Was Hotter -- 'More research from China confirms Medieval temperatures were significantly warmer than current ones. The study also provides direct evidence that the Medieval Warming was a global phenomenon, not just a European regional climate condition, as the IPCC speculates.'

New Russian Research: River Floodplains Provide Conclusive Evidence That Medieval Warming Greater Than Modern Warming

The California Medieval Warming Remains Unprecedented: 3.0°C Hotter Than Modern Global Warming

Newest Research Confirms Greenland Region Roasted With Medieval Winter/Summer Temps 3°C Hotter Than Modern Era

What Does Ural Mountains' Tree Line Say About Modern Warming? Definitely Not As Robust As Medieval Warming

New Chinese study in GRL disputes the hockey stick conclusions: 'New peer reviewed study illustrates that current warm period is neither unique nor unprecedented'

Peer-Reviewed Research: Unprecedented Global Warming During Medieval Period, Boreholes Reveal

China's 2,000 Year Temperature History: Declaring anthropogenic emissions have pushed modern temps beyond historical counterparts disregards lessons of 2,000 years of Chinese temps'

Medieval warming WAS global – new science contradicts UN IPCC: 'More peer-reviewed science contradicting the warming-alarmist 'scientific consensus' was announced' -- 'A new study shows that the well-documented warm period which took place in medieval times was not limited to Europe, or the N. hemisphere: it reached all the way to Antarctica...In other words, global warming has already occurred in historical, pre-industrial times, and then gone away again. Lu et al's work is published in the peer-reviewed journal Earth and Planetary Science Letters'

See: Climate Depot's FactSheet on Mann's Various 'Hockey Stick' Creations -- The 'most discredited study in history of Science'

Mann at it again! 'Very erroneous conclusions'- Michael Mann's newest invention! The Hurricane 'Hockey Stick!' -- Climate Depot's FactSheet on Mann's Various 'Hockey Stick' Creations

# #


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Post time 2013-3-9 15:46:56 |Display all floors
Large rise in CO2 emissions sounds climate change alarm
Hopes for 'safe' temperature increase within 2C fade as Hawaii station documents second-greatest emissions increase
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John Vidal
The Guardian, Friday 8 March 2013 10.55 GMT

Hawaii's Mauna Loa observatory, where record CO2 increases are being documented (Photograph: Richard Vogel/AP)
The chances of the world holding temperature rises to 2C – the level of global warming considered "safe" by scientists – appear to be fading fast with US scientists reporting the second-greatest annual rise in CO2 emissions in 2012.

Carbon dioxide levels measured at at Mauna Loa observatory in Hawaii jumped by 2.67 parts per million (ppm) in 2012 to 395ppm, said Pieter Tans, who leads the greenhouse gas measurement team for the US National Oceanic and Atmospheric Administration (NOAA). The record was an increase of 2.93ppm in 1998.

The jump comes as a study published in Science on Thursday looking at global surface temperatures for the past 1,500 years warned that "recent warming is unprecedented", prompting UN climate chief, Christiana Figueres, to say that "staggering global temps show urgent need to act. Rapid climate change must be countered with accelerated action."

Tans told the Associated Press the major factor was an increase in fossil fuel use. "It's just a testament to human influence being dominant", he said. "The prospects of keeping climate change below that [two-degree goal] are fading away."


Preliminary data for February 2013 show CO2 levels last month standing at their highest ever recorded at Manua Loa, a remote volcano in the Pacific. Last month they reached a record 396.80ppm with a jump of 3.26ppm parts per million between February 2012 and 2013.

Carbon dioxide levels fluctuate seasonally, with the highest levels usually observed in April. Last year the highest level at Mauna Loa was measured at 396.18ppm.

What is disturbing scientists is the the acceleration of CO2 concentrations in the atmosphere, which are occurring in spite of attempts by governments to restrain fossil fuel emissions.

According to the observatory, the average annual rate of increase for the past 10 years has been 2.07ppm – more than double the increase in the 1960s. The average increase in CO2 levels between 1959 to the present was 1.49ppm per year.

The Mauna Loa measurements coincide with a new peer-reviewed study of the pledges made by countries to reduce CO2 emissions. The Dutch government's scientific advisers show that rich countries will have to reduce enissions by 50% percent below 1990 levels by 2020 if there is to be even a medium chance of limiting warming to 2C, thus preventing some of climate change's worst impacts.

"The challenge we already knew was great is even more difficult", said Kelly Levin, a researcher with the World Resources Instistute in Washington. "But even with an increased level of reductions necessary, it shows that a 2° goal is still attainable – if we act ambitiously and immediately."

Extreme weather, which is predicted by climate scientists to occur more frequently as the atmosphere warms and CO2 levels rise, has already been seen widely in 2013.

China and India have experienced their coldest winter in decades and Australia has seen a four-month long heat wave with 123 weather records broken during what scientists are calling its 'angry summer'.

"We are in [getting] into new climatic territory. And when you get records being broken at that scale, you can start to see a shifting from one climate system to another. So the climate has in one sense actually changed and we are now entering a new series of climatic conditions that we just haven't seen before", said Tim Flannery, head of the Australian government's climate change commission, this week.

Earlier this week the Met Office warned that the "extreme" patterns of flood and drought experienced by Britain in 2012 were likely to become more frequent. One in every five days in 2012 saw flooding but one in four days were in drought.
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Post time 2013-3-9 15:48:27 |Display all floors

"We are in [getting] into new climatic territory. And when you get records being broken at that scale, you can start to see a shifting from one climate system to another. So the climate has in one sense actually changed and we are now entering a new series of climatic conditions that we just haven't seen before", said Tim Flannery, head of the Australian government's climate change commission, this week.

Earlier this week the Met Office warned that the "extreme" patterns of flood and drought experienced by Britain in 2012 were likely to become more frequent
I've made my living, Mr. Thompson, in large part as a gambler. Some days I make twenty bets, some days I make none. There are weeks, sometimes months, in fact, when I don't make any bet at all because ...

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Post time 2013-3-9 15:50:06 |Display all floors
the met office...................didn't the Rat recently posted that the Met Office no longer believe in climate change?
I've made my living, Mr. Thompson, in large part as a gambler. Some days I make twenty bets, some days I make none. There are weeks, sometimes months, in fact, when I don't make any bet at all because ...

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Post time 2013-3-9 15:59:06 |Display all floors
If you think global warming is a myth, read a different article, this one contains facts
By Marshall Connolly, Catholic Online (NEWS CONSORTIUM)
3/8/2013
Catholic Online (www.catholic.org)
Research is conclusive, global warming is real and caused by you.

If you still think global warming is a myth, you may want to read something else because this article contains facts. The most recent study which uses global data dating back 11,000 years confirms what most scientists already know. The planet is warming, dramatically, and it's correlated strongly with human activity.


Animals, as well as people, are severely affected by climate change.


LOS ANGELES, CA (Catholic Online) - A comprehensive study conducted by Oregon State University reveals that temperatures have spiked since 1950, by about 1.3 degrees Fahrenheit. The study, compared samples from ice cores and ocean sediments as well as various other sources from around the planet, which are unanimous in their revelation.

The Earth's temperature fluctuates naturally, and there have been times when natural heating of the planet has yielded both higher and lower average temperatures that what we see today. Common causes of climate change are changes in the amount of solar radiation reaching Earth and concentrations of carbon dioxide in the atmosphere.

In the past century, humans have burned astounding amounts of fossil fuels and dumped phenomenal quantities of CO2 into the atmosphere. Carbon dioxide is a greenhouse gas, which means it traps heat in the atmosphere and causes warming.

One dramatic example of CO2's power can be seen on the planet Venus where extreme concentrations of the gas in the planet's atmosphere makes temperatures on the planet's surface hot enough to melt solid metals. Venus is hotter than Mercury, which orbits closer to the sun than Venus.

On Earth, these changes have brought about ice ages and warm periods, humans having built civilization within the context of the latest warm period, known as the Holocene.

The problem is not the fact that the temperature is changing, for temperature change is normal. The problem is the sudden spike, occurring over the span of several decades rather than centuries. And while 1.3 degrees of Fahrenheit warming may not seem like much, it is enough to permanently alter the environment as we know it.

Worse, the temperature change continues to accelerate as more countries begin to pour more CO2 into the atmosphere, a product of expanding global industrialization. Countries such as China and India are now global leaders in CO2 production. Of course, this does not exonerate Americans who remain major contributors.

The relatively sudden change in climate has threatened several species and habitats around the world, since natural adaptation typically occurs over hundreds of years at best. The result is many animals in areas experiencing the greatest amount of climate change are facing extinction because they cannot adapt fast enough to changes in their environment.

This would be a minor concern in itself, however these changes affect humans. The 1.3 degrees of warming is enough to melt the ice caps in Greenland. Once covered by a vast ice sheet, the island is quickly becoming ice-free. While that means more habitable land area for the islands few residents, it also means rising sea levels.

Several low-lying coastal areas are reporting the rise in sea level with locks in the Thames and  the Netherlands having to be closed and raised more frequently than ever before to prevent catastrophic flooding, particularly during storms.

Some island nations, such as the Maldives in the Indian ocean and several Polynesian states, face complete destruction as their low-lying islands are losing land area to the ocean that will eventually consume them within the next several decades.

Worst of all, the defrosting of the tundra across Canada and Siberia is starting to release mass quantities of methane into the atmosphere which will only accelerate the warming process in the next several decades.

The northern polar ice cap is expected to melt entirely within the next century, allowing navigation directly across the North Pole.

In the United States, where the effects of global warming seem to be
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