Warm periods like the holocene begin with a delay of sometimes more than thousand years.
Could such variations occur not only in glacial times, but also in
warm periods like the present?
Stephen Porter sees the 1,500 - year cycle in the layers of wind - blown silts in China called loess, even in
warm periods like today.
In
the warm periods like today, the ice sheets retreated completely.
«Glaciers in higher colder mountainous regions will be slower to melt even as temps rise, the lower tundra areas will respond more quickly to such changes and this is shown by the quicker responses in tree line to the lesser
warming periods like the MWP at ground level further north from him, and not just fossil remains but old farming settlements uncovered, and so on.»
The discussion I had recently about this had been irritating, so many examples in my research which showed the faked Hockey Stick cause was alive and well and now not just eliminating
the warmer periods like the MWP and Roman, but taking it even further back and ludicrously even positing that temps now were rising higher than at any time in the Holocene, but the 6/7, 000 year had been a first step to this, eliminating the Holocene Maximum by clever sleights of hand and word play.
It's particularly important data to get, as you want to know how the whiplashes work in
a warm period like today's, when Greenland and Iceland are the main source of North Atlantic meltwater and the sea level is at a modern height.
Not exact matches
In his Formation of the Fetus, Galen says that the fetus gradually moves from a plant -
like state until in the final
period it acquires the capacity for the heat of a
warm - blooded creature, its heart begins to beat, and it moves on its own.
«We found compelling evidence that invasive shrubs, such as Japanese barberry, are ready to leaf out quickly once they are exposed to
warm temperatures in the lab even in the middle of winter, whereas native shrubs,
like highbush bluberry, and native trees,
like red maple, need to go through a longer winter chilling
period before they can leaf out — and even then their response is slow,» says Amanda Gallinat, a second - year graduate student and third author of the paper.
DeConto and Pollard's study was motivated by reconstructions of sea level rise during past
warm periods including the previous inter-glacial (around 125,000 years ago) and earlier
warm intervals
like the Pliocene (around 3 million years ago).
The sediment cores used in this study cover a
period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial
periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively
warm interglacial
periods with climates more
like today's.
Using climate models to understand the physical processes that were at play during the glacial
periods, the team were able to show that a gradual rise in CO2 strengthened the trade winds across Central America by inducing an El Nino -
like warming pattern with stronger
warming in the East Pacific than the Western Atlantic.
Climate model simulations show that Pinatubo -
like eruptions tend to shorten La Niñas, lengthen El Niños and lead to unusual
warming during neutral
periods, the study says.
And it's possible that we are currently no
warmer than we were a thousand years ago, during the «Medieval
Warm Period» or «Medieval Optimum,» an interval of warm conditions known from historical records and indirect evidence like tree ri
Warm Period» or «Medieval Optimum,» an interval of
warm conditions known from historical records and indirect evidence like tree ri
warm conditions known from historical records and indirect evidence
like tree rings.
I have got used to the usual bunkum (
like urban heat islands, water vapour, medieval
warm period etc.) but quoting Stefan - Boltzmann equations was new to me.
In reply to a question about how did the Vikings grow wine in Norway (during the Medieval
Warm Period (MWP)-RRB-, Wallace says: «It's possible that the Vikings were making wine from Concord -
like grapes, which can grow in relatively cold climates.»
The total composite looks rather
like the Mann et al 1999 NH reconstruction — the Medieval
Warm periods (MWP) and Little Ice Ages (LIA) are barely perceptible and the temperature proxy skies upwards (a bit
like a «hockey stick»!)
I would also
like to add that the paper: Glacial geological evidence for the medieval
warm period (Climatic Change, Volume 26, Numbers 2 - 3, pp. 143 - 169, March 1994)- Jean M. Grove, Roy Switsur is available as PDF on Google Books.
Zooming in on the
period after 1970, one sees a record of largely unabated
warming, with temperatures increasing steadily accompanied by some short - term variability driven by El Niño and La Niña events, and also by major volcanic eruptions
like Pinatubo in 1992.
In geological time, the balance of the system has changed several times, and just
like any system can have a resonance at certain points, the climate can reach a resonant point where it is teetering between two states (our current 100,000 year ice age
warm period cycle).
My
periods are usually 3 to 4 days i would say but recently i have been detoxing with lemon and parsley in
warm water every morning (good for kidneys etc) and i also had a fat freezing treatment (a non invasive way of freezing and killing fat cells and then they are slowly flushed away by body)-- and this month i had a very intense
period lasting for 2 days but it was so heavy, it felt
like everything came out in those two days.
RESTAURANTS: As the FDA requires restaurants to use stainless steel pots and vats, minimize restaurant patronage, especially at buffets where salty and acidic food,
like tomato sauces and pastas sit out in stainless
warming trays for extended
periods of time.
The
warming sensation goes from feeling
like a hot - water bottle to moderate
period cramps, which were uncomfortable but tolerable.
I love
warm weather so the colder months always feel
like a bit of a mourning
period for me but really I'm just lazy.
For a short
period of time in the mountains, I suggest wearing a lightweight fleece jacket
like the one I'm wearing above by The North Face — it's
warm, and it won't take up much space in your luggage.
I don't
like so much winter season (and here in Rome it's even often pretty
warm, sunny and nice...), except for Xmas
period, I don't
like cold weather and chill wind (especially in the early morning when I d my daily running session), and above all I don't
like to wear too much and heavy clothes!
Like all the best performance cars, you need to cycle - in a
warm - up
period before attacking — turn - in oversteer is noticeable when the rear tyres are cool.
Be careful not to shift too quickly into an active mode — dogs need
warm - up
periods for active exertions just
like people.
Dogs,
like people, should build up stamina first before embarking on a five mile run, and need a
warm up and cool down
period before vigorous exercise, so if you are considering increasing your dog's daily exercise, do so slowly to ensure your dog is fit enough for more active exercise.
The bottom - line is; your senior dog's excessive panting is telling you something while it may be simple
like they are too
warm or nervous about something, it could also be the sign of an underlying medical issue, especially if it is combined with other symptoms or goes on for prolonged
periods.
I would just
like to thank you for a very nice time I spent at your guesthouse, Yes it was a very short
period spent but the atmosphere and the
warm...
I would
like to see discussion about the most recent
period of rapid global
warming... leading to the Paleocene Eocene Thermal Maximum (PETM) about 55 million years ago... including differences and similarities to the climate projections for this century... and beyond.
If the planet's climate were changing solely because that's what planets do, evolve through different climatic
periods of
warming and cooling over millions of years, adverse consequences
like the loss of coral reefs and the potential for disappearing Polar Bears would still be undeniably sad, but at least a little easier to swallow.
In reply to a question about how did the Vikings grow wine in Norway (during the Medieval
Warm Period (MWP)-RRB-, Wallace says: «It's possible that the Vikings were making wine from Concord -
like grapes, which can grow in relatively cold climates.»
With
warmer SSTs, I would imagine there will be more storms
like Wilma that will increase their intensity from TS to cat 4/5 level in a very short
period of time.
[14] Although there is an extreme scarcity of data from Australia (for both the Medieval
Warm Period and Little Ice Age) evidence from wave built shingle terraces for a permanently full Lake Eyre during the ninth and tenth centuries is consistent with this La Niña -
like configuration, though of itself inadequate to show how lake levels varied from year to year or what climatic conditions elsewhere in Australia were
like.
In geological time, the balance of the system has changed several times, and just
like any system can have a resonance at certain points, the climate can reach a resonant point where it is teetering between two states (our current 100,000 year ice age
warm period cycle).
There are many direct proxies
like ice cores that indicate much
warmer periods in the past on the 4,000 and 11,000 year scales.
But I think the 0.8 degree C figure that we always hear for global
warming period is low if we include the entire rise, if taken back to 1780
like this.
They found that northern hemisphere
warming and droughts between the years 950 and 1250 corresponded to an El Niño -
like state in the Pacific, which switched to a La Niña -
like pattern during a cold
period between 1350 and 1900.
It looks
like a statistic artifact to me, maybe the infilling increased or decreased in that
period with in - filled data being biased
warm or biased cold and thus creating that issue.
Conditions
like this occurred at the peaks of every
warm period in the past ten thousand years.
All evidence suggests that significant climate changes
like the LIA, and the Medieval
Warm Period that preceded it, are the result of significant changes in solar activity.
@ - Herman Alexander Pope» Conditions
like this occurred at the peaks of every
warm period in the past ten thousand years.
An AGW believer
like Steven Mosher will tell you that AGW theory doesn't claim that AGW explains all the
warming for a given
period, but that AGW makes it That Much
Warmer Than It Would Have Been.
There were conditions
like now, during the Roman
Warm period and during the Medieval
Warm period and that is why enough snow fell to cause the cool
periods that followed.
I presented links to the possible causes of the
warming of the
period 80s and 90s (just
like the scientists debating the possible causes of «hiatus» of the last 13 years) and you dissmiss that as irrelevant?
In the past 2m years the temperature has gone up and down
like a yo - yo as ice ages have alternated with
warmer interglacial
periods.
CH, if you have some idea of what is going to happen with the extra 5 W / m2 forcing in the 21st century, you need to say it, because otherwise people will just think it will simply get
warmer like the last time the earth had so much CO2 which was in the Eocene epoch (a pre-Antarctic ice shelf
period).
It's easier to say the «
warmest on record» if you pick a short
period,
like the first two weeks of February.