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? asked in EnvironmentGlobal Warming · 1 month ago

Why do they call it the medieval warm period when it was the beginning of a period of global cooling?

Update:

Anybody sensible?

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7 Answers

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  • ?
    Lv 6
    1 month ago

    Possible causes of the Medieval Warm Period include increased solar activity, decreased volcanic activity, and changes to ocean circulation. ... Climate proxy records show peak warmth occurred at different times for different regions, indicating that the Medieval Warm Period was not a globally uniform event.

  • Anonymous
    1 month ago

    Your chart is laughable and scribbled by a 12 yr old 

  • ?
    Lv 7
    1 month ago

    That looks more like Manns infamous "Hockey Stick" chart rather than something a real scientist wud generate.

    The last 10-20 thousand years have been extraordinarily stable. Hence the name "Inter-Glacial" period.

    The Medieval was the warm cycle right before the "little ice age". Just as the Roman warm cycle preceded a "little ice age" before that. ** Their called "Little....." because the ice ages during this mild period are nothing like the conditions 20,000 years ago.

    .

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  • 1 month ago

    The warm period came BEFORE the cooling.  That's logical isn't it?  And then after the cooling, warming began.  

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  • ?
    Lv 5
    1 month ago

    Most scientists now accept the Medieval warming period was a global phenomenon.

    Graph below show MWP is Medieval warming period.  LIA is little ice age.

    `

    CO2 Science has a nice summary.  Here is the beginning.  Do an internet search for the rest.

    Medieval Warm Period (Global) -- Summary

    Between the 10th and 14th centuries AD, earth's average global temperature may have been warmer than it is today, according to the analyses of Lamb (1977, 1984, 1988) and Grove (1988). 

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    In fact, the environmental conditions of this time period have been determined to have been so favorable that it was often referred to as the Little Climatic Optimum (Imbrie and Imbrie, 1979; Dean, 1994; Petersen, 1994; Serre-Bachet, 1994; Villalba, 1994).

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  • Jim2
    Lv 7
    1 month ago

    From what I gather, the warming was mostly in Europe; it was not global.UPDATE. So there seems to be a debate. From Wikipedia, where I found your graph, Note that this information was updated in 2019, and they did NOT find global warming. Also, the second link in my source says it wasn't global or even that warm:

    "In 2013, a study by the Pages-2k consortium suggests the warming was not globally synchronous: "Our regional temperature reconstructions also show little evidence for globally synchronized multi-decadal shifts that would mark well-defined worldwide MWP and LIA intervals. Instead, the specific timing of peak warm and cold intervals varies regionally, with multi-decadal variability resulting in regionally specific temperature departures from an underlying global cooling trend."[17] In direct contrast to these findings, a 2013 study recreated a "temperature record of western equatorial Pacific subsurface and intermediate water masses over the past 10,000 years that shows that heat content varied in step with both Northern and Southern high-latitude oceans. The findings support the view that the Holocene Thermal Maximum, the Medieval Warm Period, and the Little Ice Age were global events, and they provide a long-term perspective for evaluating the role of ocean heat content in various warming scenarios for the future."[18]

    In 2019, using an extended proxy data set,[19] the Pages-2k consortium confirmed that the Medieval Climate Anomaly was not a globally synchronous event. The warmest 51-year period within 'Medieval Warm Period' did not occur at the same time for different regions. They argue for a regional instead of global framing of climate variability in the preindustrial Common Era to aid understanding.[20]"

  • 1 month ago

    Your use of Mann's hockey stick graph shows your ignorance and anti science beliefs.

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