New Temperature Reconstruction from I...

New Temperature Reconstruction from Indo-Pacific Warm Pool Confirms MWP

There are 11 comments on the www.whoi.edu story from Sep 2, 2009, titled New Temperature Reconstruction from Indo-Pacific Warm Pool Confirms MWP. In it, www.whoi.edu reports that:

A new 2,000-year-long reconstruction of sea surface temperatures (SST) from the Indo-Pacific warm pool (IPWP) suggests that temperatures in the region may have been as warm during the Medieval Warm Period as they are today.

The marine-based IPWP temperature reconstruction is in many ways similar to land temperature reconstructions from the Northern Hemisphere (NH). Major trends observed in NH temperature reconstructions, including the cooling during the Little Ice Age (~1500-1850 AD) and the marked warming during the late twentieth century, are also observed in the IPWP.

“The more interesting and potentially controversial result is that our data indicate surface water temperatures during a part of the Medieval Warm Period that are similar to today’s,” says Delia Oppo, a paleo–oceanographer with the Woods Hole Oceanographic Institution.

Join the discussion below, or Read more at www.whoi.edu.

truthist

United States

#1 Sep 2, 2009
The thread title should have been "New Temperature Reconstruction from Indo-Pacific Warm Pool"

This is the abstract, published in Nature, of its source: "2,000-year-long temperature and hydrology reconstructions from the Indo-Pacific warm pool"

Northern Hemisphere surface temperature reconstructions suggest that the late twentieth century was warmer than any other time during the past 500 years and possibly any time during the past 1,300 years (refs 1, 2). These temperature reconstructions are based largely on terrestrial records from extra-tropical or high-elevation sites; however, global average surface temperature changes closely follow those of the global tropics (3), which are 75% ocean. In particular, the tropical Indo-Pacific warm pool (IPWP) represents a major heat reservoir that both influences global atmospheric circulation (4) and responds to remote northern high-latitude forcings (5, 6). Here we present a decadally resolved continuous sea surface temperature (SST) reconstruction from the IPWP that spans the past two millennia and overlaps the instrumental record, enabling both a direct comparison of proxy data to the instrumental record and an evaluation of past changes in the context of twentieth century trends. Our record from the Makassar Strait, Indonesia, exhibits trends that are similar to a recent Northern Hemisphere temperature reconstruction (2). Reconstructed SST was, however, within error of modern values from about ad 1000 to ad 1250, towards the end of the Medieval Warm Period. SSTs during the Little Ice Age (approximately ad 1550–1850) were variable, and 0.5 to 1 °C colder than modern values during the coldest intervals. A companion reconstruction of O18 of sea water—a sea surface salinity and hydrology indicator—indicates a tight coupling with the East Asian monsoon system and remote control of IPWP hydrology on centennial–millennial timescales, rather than a dominant influence from local SST variation.
----------
Published on 27 August 2009; Received 6 December 2008; Accepted 15 June 2009

Science marches on.
frank miller

United States

#2 Sep 2, 2009
Saaay Whaaat? Saaay Whaaat 'truthist'#1'????
You know you can tell how really UNEDUCATED somone is when they rebut an argument by saying exactly the same thing, but in eqivocating obfuscating language, and not even paraphrasing
in their own plain English, but quoting from some obscure site which the original paper probably considered anyway in footnotes!
And another imbecile marches on! Why don't you look up the Fig.#2 on the Sargaso Sea temperature
readings intrapolated fom analysis of sediments
to the year -1000, and extrapolated to the year 2000 in the January 1998 monograph titled " Environmental Effects of Increased Atmospheric Carbon Dioxide" by the Oregon Institute of Science and Medicine; and the George C. Marshall
Institute I have quote many times, and from "
An Inconvenient Truth" in 2004 data as published, but reversed!!sic. In 'year'-1000 the sea temperature was 25C {77F}; in the 'year'-500the temperature was 25C {{77F}; in the 'year' 0, the temperature dropped to 22C {71.6F}; in the 'year'+500 sea temperature was 21.7 C{70.2F}; in the 'year'+1000 temperature was 24.5C {76F}[Medieval Climate Optimum}; in the year +1500
temperature was 22C{71.6F}; and the year +1750 {Little Ice Age} sea temperature was 21.8 C {71.5F}; and in 2000 sea temperature was 22.5C {72.5F}! Now what do you see 'truthist'?? A range of 25C HI 4000 years, to 22.5C in 2000!!
Get some education on proportional differentiation vs. doom-and -gloom seas rising drowning us all IDIOT!!
F.M.
Fun Facts

AOL

#3 Sep 3, 2009
The MWP and LIA were world wide climates. There are many studies that support the MWP being as warm if not warmer that the current warm period.

http://www.ncpa.org/pub/st279

"The Earth currently is experiencing a warming trend, but there is scientific evidence that human activities have little to do with it. Instead, the warming seems to be part of a 1,500-year cycle (plus or minus 500 years) of moderate temperature swings.

It has long been accepted that the Earth has experienced climate cycles, most notably the 90,000-year Ice Age cycles. But in the past 20 years or so, modern science has discovered evidence that within those broad Ice Age cycles, the Earth also experiences 1,500-year warming-cooling cycles. The Earth has been in the Modern Warming portion of the current cycle since about 1850, following a Little Ice Age from about 1300 to 1850. It appears likely that warming will continue for some time into the future, perhaps 200 years or more, regardless of human activity."
truthist

United States

#4 Sep 3, 2009
For the clueless.. My post above contains the actual abstract as published in the science journal called "Nature." See how science is expressed.

Take your ignorant objections to Nature. Science is not made by either Topix or ideology. And definitely NOT by non-scientists like 'fake facts' and 'farsa mind.' lol
Earthling

Almería, Spain

#5 Sep 3, 2009
Take away their ability to copy/paste items from websites and alarmists are left with only insults and name calling, but not one original thought between them.
truthist

United States

#6 Sep 3, 2009
Earthling wrote:
Take away their ability
Not a snowball chance in hell you can take away any ability of any poster. You have NO brain.
<quoted text>
to copy/paste items
That is called the evidence, dirtling.
<quoted text>
from websites
This is the Topix, "Earthling has no brain." I chose "Nature" so that others could read the original science.
<quoted text>
and alarmists
Name caller.
<quoted text>
are left with only insults and name calling,
That is what you do plus "unconfirmed guesswork."
<quoted text>
but not one original thought between them.
WRONG. This is why people say: Earthling has NO brain."
NobodyYouKnow

Hamilton, Canada

#7 Sep 3, 2009
Fun Facts wrote:
The MWP and LIA were world wide climates.
A sychronous warming and cooling of the entire planetary surface of 2C or so takes way too much energy. It has taken a hundred years and 40% increase in GHGs to add 0.8C. The idea of a global MWP and LIA doesn't pass the 'giggle test' for anyone that can estimate the required forcing.
JRS

Oak Creek, WI

#8 Sep 3, 2009
NobodyYouKnow wrote:
<quoted text>
A sychronous warming and cooling of the entire planetary surface of 2C or so takes way too much energy. It has taken a hundred years and 40% increase in GHGs to add 0.8C. The idea of a global MWP and LIA doesn't pass the 'giggle test' for anyone that can estimate the required forcing.
Oh, brother. give it a rest. AGW crisis peddlers have the mentality of 6th graders. No, in this posts case, a bipolar 6th grader.
Fun Facts

AOL

#9 Sep 4, 2009
NobodyYouKnow wrote:
<quoted text>
A sychronous warming and cooling of the entire planetary surface of 2C or so takes way too much energy. It has taken a hundred years and 40% increase in GHGs to add 0.8C. The idea of a global MWP and LIA doesn't pass the 'giggle test' for anyone that can estimate the required forcing.
If that is true, then maybe the "estimate (of) the required forcing" is wrong.

The MWP and the LIA were world wide events. If your calculations do not show them to be world wide events, then maybe your calculations are wrong.

The LIA had the largest extent of glaciation since the Younger Dryas. That means that there was more snow and ice in the northern hemisphere during the LIA than there was at any time prior to that period since the end of the last period of glaciation, commonly referred to as the last ice age.

We are currently in an ice age and have been for the last 2.5 to 3 million years. The last 500,000 years have been the most severe portion of the ice age. Currently we are in an interglacial. This started 14,700 years ago when the earth hit max eccentricity. The thermal max of this interglacial happened 9000 years (approx)ago when the earth experienced max obliquity. The earth has been declining in eccentricity, opbliquity and temperature since that time.

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#10 Sep 4, 2009
NobodyYouKnow wrote:
<quoted text>
A sychronous warming and cooling of the entire planetary surface of 2C or so takes way too much energy. It has taken a hundred years and 40% increase in GHGs to add 0.8C. The idea of a global MWP and LIA doesn't pass the 'giggle test' for anyone that can estimate the required forcing.
Which is actually proof that the AGW and GHG tyeories are flawed and need a serious rethink. If you want something that can pass your giggle test try using the sun. It has more than enought energy to account for all your temp changes.
truthist

United States

#11 Sep 16, 2009
NobodyYouKnow wrote:
<quoted text>
A sychronous warming and cooling of the entire planetary surface of 2C or so takes way too much energy. It has taken a hundred years and 40% increase in GHGs to add 0.8C. The idea of a global MWP and LIA doesn't pass the 'giggle test' for anyone that can estimate the required forcing.
CNN says today: Earth's oceans had warmest summer on record

Summer temperatures for the globe's ocean surface ranked as the warmest on record, according to a report released Wednesday by the National Climatic Data Center.

Overall, when the Earth's land areas and oceans are included together, the three-month June-August period measured as the third-warmest summer on record. Global climate records go back to 1880.

Climatologists measure summer from June 1 to Aug. 31. The climate center is a branch of the National Oceanic and Atmospheric Administration (NOAA).

"During the season, warmer-than-average temperatures engulfed much of the planet's surface," the center wrote in an online report. One exception to the warmth was the north-central USA and central Canada, which had an unusually cool summer due to a persistent trough of low pressure that kept the area cloudy and cool.

The ocean's summer temperature was 62.5 degrees, 1 degree above the 20th-century average of 61.5 degrees.

The cause of the warmth? Deke Arndt, chief of the climate monitoring branch at the climate center, says it's due to a combination of man-made global warming and El Nino, a natural periodic warming of the tropical Pacific Ocean that affects weather around the world. "Each of those is a component in this summer's temperatures, he said.

"If El Nino continues to mature as projected by NOAA, global temperatures are likely to continue to threaten previous record highs," noted the center's report.

What really jumped out at Arndt, he says, was the heat in the Southern Hemisphere. "The warmth in Australia and South America in August was striking," he says. "Land areas in the Southern Hemisphere in August broke their previous record by a large amount."

Overall, it was the second-warmest winter on record in the Southern Hemisphere.(June-August is winter in the Southern Hemisphere.)

Additionally, according to the National Snow and Ice Data Center, Arctic sea ice covered an average of 2.42 million square miles during August. This is 18.4% below the 1979-2000 average extent and is consistent with a decline of August sea ice extent since 1979.
http://www.usatoday.com/weather/climate/2009-...

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