Greenland temperature variability is high and there is evidence during
the late Medieval Warm Period of a warm period in year 1150, that is 862 years before present (Kobashi et al. 2011).
The late Medieval warm period is called a climatic optimum for a good reason.
Not exact matches
There was no explanation of why both the
medieval warm period and the little ice age, very clearly shown in the 1990 report, had simply disappeared eleven years
later.
In contrast, the consensus view among paleoclimatologists is that the
Medieval Warming Period was a regional phenomenon, that the worldwide nature of the Little Ice Age is open to question and that the
late 20th century saw the most extreme global average temperatures.
... Continental - scale surface temperature reconstructions show, with high confidence, multi-decadal
periods during the
Medieval Climate Anomaly (950 to 1250) that were in some regions as
warm as in the mid-20th century and in others as
warm as in the
late 20th century.
Looking at just recent history we have the Roman
Warm Period around the 1st century, 500 years
later the dark ages (massive crop failures and starvation), another 500 years the
Medieval Warm Period and 500 years
later the Little Ice Age.
Fair enough, but two points are clear — the two
warm periods reconstructed —
Medieval and
late 1700s are > 0.6 C cooler than recent NH anomalies of around 1C CRU], which means that while the details differ, McIntyre's plot is fully consistent with the conclusion of Mann et al 2008 that recent warmth is unprecedented for 1,000 years or more.
â $ œThe
late Holocene records clearly identify Neoglacial events of the Little Ice Age (LIA) and
Medieval Warm Period (MWP).
Earth and Planetary Science Letters Volumes 325 — 326, 1 April 2012, Pages 108 — 115 An ikaite record of
late Holocene climate at the Antarctic Peninsula This ikaite record qualitatively supports that both the
Medieval Warm Period and Little Ice Age extended to the Antarctic Peninsula.
As the start date pushed into October from the
late 1400s so Europe entered a
period known as the Little Ice Age, which followed the Medieval Warm P
period known as the Little Ice Age, which followed the
Medieval Warm PeriodPeriod.
But in the 2001 IPCC report, the
Medieval Warm period disappeared and became much cooler than the
late 20th century.
(6) Ice core data provide evidence of a quasi millennial oscillation with alternating
warm and cool periods: ● Minoan Warm Period about 3 k - years ago ● Roman Warm Period about 2 k - years ago ● Dark (cool) Age about 1.5 k - year ago ● Medieval Warm Period from about early 10th to late 14th century ● Little Ice Age from about late 14th to mid 19th cent
warm and cool
periods: ● Minoan
Warm Period about 3 k - years ago ● Roman Warm Period about 2 k - years ago ● Dark (cool) Age about 1.5 k - year ago ● Medieval Warm Period from about early 10th to late 14th century ● Little Ice Age from about late 14th to mid 19th cent
Warm Period about 3 k - years ago ● Roman
Warm Period about 2 k - years ago ● Dark (cool) Age about 1.5 k - year ago ● Medieval Warm Period from about early 10th to late 14th century ● Little Ice Age from about late 14th to mid 19th cent
Warm Period about 2 k - years ago ● Dark (cool) Age about 1.5 k - year ago ●
Medieval Warm Period from about early 10th to late 14th century ● Little Ice Age from about late 14th to mid 19th cent
Warm Period from about early 10th to
late 14th century ● Little Ice Age from about
late 14th to mid 19th century.
The
late tenth to early thirteenth centuries (about AD 950-1250) appear to have been exceptionally
warm in western Europe, Iceland and Greenland (Alexandre 1987, Lamb, 1988) This
period is known as the
Medieval Climatic Optimum China was, however, cold at this time (mainly in winter) but South Japan was
warm (Yoshino, 1978) This
period of widespread warmth is...
Noteworthy in the reconstructions are the post-1976
warm / wet period, unprecedented in the 1,425 - year record both in amplitude and duration, anomalous and prolonged late 20th century warmth, that while never exceeded, was nearly equaled in magnitude for brief intervals in the past, and substantial decadal - scale variability within the Medieval Warm Period and Little Ice Age interv
warm / wet
period, unprecedented in the 1,425 - year record both in amplitude and duration, anomalous and prolonged late 20th century warmth, that while never exceeded, was nearly equaled in magnitude for brief intervals in the past, and substantial decadal - scale variability within the Medieval Warm Period and Little Ice Age inte
period, unprecedented in the 1,425 - year record both in amplitude and duration, anomalous and prolonged
late 20th century warmth, that while never exceeded, was nearly equaled in magnitude for brief intervals in the past, and substantial decadal - scale variability within the
Medieval Warm Period and Little Ice Age interv
Warm Period and Little Ice Age inte
Period and Little Ice Age intervals.
I don't necessarily see any contradiction whatsoever with the work of Mann et al., which showed that although many individual regions experienced similar warmth to modern warmth sometime in some broadly - defined «
Medieval Warm Period», the
warmest times were asynchronous in different regions and, hence, when you looked globally the warmth was not as great as the
late 20th century warmth which was not asynchronous.
The growth rings of trees provided the evidence for reconstructions of what climatologists call the
warm Medieval period, and the researchers matched the picture from the past with 17 different computer model predictions of the climate
later in the 21st century.
Anyone who admits that would also have to admit that the climate models (which don't «predict» a
Medieval Warm Period) are inadequate, don't understand all the forcings, and are therefore woefully inadequate for attribution studies (the ones that «tell» us what caused the
latest warming).
So we look at the last ten thousand years, and we see a
warming like all the others which have never stopped alternating with coolings; we see a dribble of sea level rise since the
late 1700s which is as normal as cornflakes in the morning; we see polar ice variations well in line with what everybody USED to know about the
medieval period till recently...
«Continental - scale surface temperature reconstructions show, with high confidence, multi-decadal
periods during the
Medieval Climate Anomaly (year 950 to 1250) that were in some regions as
warm as in the
late 20th century.
In contrast, the consensus view among paleoclimatologists is that the
Medieval Warming Period was a regional phenomenon, that the worldwide nature of the Little Ice Age is open to question and that the
late 20th century saw the most extreme global average temperatures.
The 900 - year long handle completely ignores two indisputable eras, the
Medieval Warm Period, from about 950 to 1250 A.D. and the
later Little Ice Age from 1300 to 1850.
Hence, although the climate of northern Fennoscandia seems to have been significantly
warmer during
medieval times as compared to the
late - twentieth century, the published composite records of northern hemisphere climate (Moberg et al. 2005) do not show a conspicuously
warm period around ad 1000.
Grudd's paper (available here, open access) deals solely with summer temperatures at Lake Tornetrask in Northern Sweden, and the paper states clearly that «although the climate of northern Fennoscandia seems to have been significantly
warmer during
medieval times as compared to the
late - twentieth century, the published composite records of northern hemisphere climate (Moberg et al. 2005) do not show a conspicuously
warm period around AD 1000.»
(As an aside, remember that AGW supporters write off the
Medieval Warm Period because it was merely a local phenomena in the Northern Hemisphere not observed in the south — can't we apply the same logic to the
late 20th century based on this satellite data?)