Posted on July 15, 2010 in General Faq
We are now entering the third series of myths and facts about global warming. In relation with the article, do you know the issues and opinions about the medieval warm period and the correlation with global warming?
Inside this article, we will give you information about this issue so that you will have a better understanding about global warming myths and facts.
The structure of this article is as follows:
- Opinion: The Medieval Warm Period contradict global warming
- The Facts
- Conclusion
Optimistically, you would acquire useful information for you and your loved ones.
We wish you a very happy learning about global warming myths and facts!
Opinion: The Medieval Warm Period contradict global warming
Points to consider:
- The Medieval Warming Period is similar to the recent warming trend.
- The Medieval Warming Period definitely a natural event. For this reason, the recent increasing temperature is possibly caused by natural processes.
The Facts
- During the tenth and fourteenth century, a relatively warm period happened and is well-known as The Medieval Warm Period (MWP). Nevertheless, most recorded data about MWP collected from Europe and more current studies point out that MWP is not a worldwide phenomenon.
- Based on numerous reconstruction of WMP, it resulted that the average temperatute during WMP was not as thrilling as recent temperatures. Furthermore, WMP was localized only in one region (Europe).
- Another strong proof that WMP happened in Europe only can be seen from Andean glaciers. Nowadays, Andean glaciers are melting significantly. These glaciers will not have survived if WMP was a global phenomenon.
- By equating the cause of recent warming with WMP would create flaws. Natural causes could be the contributor of WMP in the past, but it does not mean that the current warming is also caused by natural processes.
- The direct scientific evidence revealed that human activities have produced greenhouse gases. These gases are the major contributor to the increasing temperature of the Earth.
Conclusion
The Medieval Warm Period was an Earth natural phenomenon. However, we cannot accuse that the cause of the recent warming is the same as the cause of WMP. Hence, we still have a duty to put attention on the overwhelming implications of global warming.
Be active in preserving our environment and preventing global warming. Let’s make our world a better place for the entire people. Above all, let’s start from ourselves.
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July 16th, 2010 at 10:07 pm
It is not true that the Medieval Warm Period was restricted to Europe. Most recent studies show evidence for the Medieval Warm Period in most of the Northern Hemisphere and in parts of the Southern Hemisphere as well. Actually, the Medieval Warm Period is even better documented today for China (East Asia) then it is for Europe. Even in tropical regions (e.g., the Pacific Warm Pool) do we see the Medieval Warm Period. A recent multiproxy temperature reconstruction for South America shows it there as well. Some years ago many climate scholars, based on the limited evidences available than, thought the Medieval Warm Period was restricted to Europe and parts of the North Atlantic region but strong evidences have in the last 8–10 years been coming up for a more global Medieval Warm Period.
I would suggest you to read, for example:
Barclay, D.J., Wiles, G.C., and Calkin, P.E. 2009. Tree-ring crossdates for a first millennium AD advance of Tebenkof Glacier, southern Alaska. Quaternary Research, 71: 22–26.
Cook, T.L., Bradley, R.S., Stoner, J.S. and Francus, P., 2009: Five thousand years of sediment transfer in a high arctic watershed recorded in annually laminated sediments from Lower Murray Lake, Ellesmere Island, Nunavut, Canada. Journal of Paleolimnology, 41: 77–94.
Esper, J. and Frank, D.C., 2009: IPCC on heterogeneous Medieval Warm Period. Climatic Change, 94: 267–273.
Ge, Q., Zheng, J., Fang, X., Man, Z., Zhang, X., Zhang, P., and Wang, W.-C., 2003: Winter half-year temperature reconstruction for the middle and lower reaches of the Yellow River and Yangtze River, China, during the past 2000 years. The Holocene, 13: 933–940.
Ge, Q.S., Zheng, J.-Y., Hao, Z.-X., Shao, X.-M., Wang, W.-C., and Luterbacher, J., 2010: Temperature variation through 2000 years in China: An uncertainty analysis of reconstruction and regional difference. Geophysical Research Letters, 37: 10.1029/2009GL041281.
Jones, P.D., Briffa, K.R., Osborn, T.J., Lough, J.M., van Ommen, T.D., Vinther, B.M., Luterbacher, J., Wahl, E.R., Zwiers, F.W., Mann, M.E., Schmidt, G.A., Ammann, C.M., Buckley, B.M., Cobb, K.M., Esper, J., Goosse, H., Graham, N., Jansen, E., Kiefer, T., Kull, C., Küttel, M., Mosley-Thompson, E., Overpeck, J.T., Riedwyl, N., Schulz, M., Tudhope, A.W., Villalba, R., Wanner, H., Wolff, E. and Xoplaki, E., 2009: High-resolution palaeoclimatology of the last millennium: A review of current status and future prospects. The Holocene, 19: 3–49.
Ljungqvist, F.C., 2009: Temperature proxy records covering the last two millennia: a tabular and visual overview. Geografiska Annaler, 91A: 11–29.
Mann, M.E., Zhang, Z., Rutherford, S., Bradley, R.S., Hughes, M.K., Shindell, D., Ammann, C., Faluvegi, G., and Ni, F., 2009: Global signatures and dynamical origins of the Little Ice Age and Medieval Climate Anomaly. Science, 326: 1256–1260.
Moberg, A., Sonechkln, D.M., Holmgren, K., Datsenko, N.M., and Karlén, W., 2005: Highly variable Northern Hemisphere temperatures reconstructed from low- and high-resolution proxy data. Nature, 433: 613–617.
Neukom, R., Luterbacher, J., Villalba, R., Küttel, M., Frank, D., Jones, P.D., Grosjean, M., Wanner, H., Aravena, J.-C., Black, D.E., Christie, D.A., D’Arrigo, R., Lara, A., Morales, M., Soliz-Gamboa, C., Srur, A., Urrutia, R., and von Gunten, L., 2010: Multiproxy summer and winter surface air temperature field reconstructions for southern South America covering the past centuries. Climate Dynamics: in press.
Yang, B., Braeuning, A., Johnson, K.R., and Yafeng, S., 2002: General characteristics of temperature variation in China during the last two millennia. Geophysical Research Letters, 29: 1324.
Wanner, H., Beer, J., Bütikofer, J. Crowley, T., Cubasch, U., Flückiger, J., Goosse, H., Grosjean, M., Joos, F., Kaplan, J.O., Küttel, M., Müller, S., Pentice, C. Solomina, O., Stocker, T., Tarasov, P., Wagner, M., and Widmann, M., 2008: Mid to late Holocene climate change – an overview. Quaternary Science Reviews, 27: 1791–1828.