Changes in climate affected human societies throughout the last millennium. While European cold periods in the 17th and 18th century have been assessed in detail, earlier cold periods received much less attention due to sparse information available. New evidence from proxy archives, historical documentary sources and climate model simulations permit us to provide an interdisciplinary, systematic assessment of an exceptionally cold period in the 15th century. Our assessment includes the role of internal, unforced climate variability and external forcing in shaping extreme climatic conditions and the impacts on and responses of the medieval society in north-western and central Europe. Climate reconstructions from a multitude of natural and anthropogenic archives indicate that the 1430s were the coldest decade in north-western and central Europe in the 15th century. This decade is characterised by cold winters and average to warm summers resulting in a strong seasonal cycle in temperature. Results from comprehensive climate models indicate consistently that these conditions occurred by chance due to the partly chaotic internal variability within the climate system. External forcing like volcanic eruptions tends to reduce simulated temperature seasonality and cannot explain the reconstructions. The strong seasonal cycle in temperature reduced food production and led to increasing food prices, a subsistence crisis and a famine in parts of Europe. Societies were not prepared to cope with failing markets and interrupted trade routes. In response to the crisis, authorities implemented numerous measures of supply policy and adaptation such as the installation of grain storage capacities to be prepared for future food production shortfalls
The origin of the medieval Black Death pandemic (ad 1346–1353) has been a topic of continuous investigation because of the pandemic’s extensive demographic impact and long-lasting consequences1,2. Until now, the most debated archaeological evidence potentially associated with the pandemic’s initiation derives from cemeteries located near Lake Issyk-Kul of modern-day Kyrgyzstan1,3–9. These sites are thought to have housed victims of a fourteenth-century epidemic as tombstone inscriptions directly dated to 1338–1339 state ‘pestilence’ as the cause of death for the buried individuals9. Here we report ancient DNA data from seven individuals exhumed from two of these cemeteries, Kara-Djigach and Burana. Our synthesis of archaeological, historical and ancient genomic data shows a clear involvement of the plague bacterium Yersinia pestis in this epidemic event. Two reconstructed ancient Y. pestis genomes represent a single strain and are identified as the most recent common ancestor of a major diversification commonly associated with the pandemic’s emergence, here dated to the first half of the fourteenth century. Comparisons with present-day diversity from Y. pestis reservoirs in the extended Tian Shan region support a local emergence of the recovered ancient strain. Through multiple lines of evidence, our data support an early fourteenth-century source of the second plague pandemic in central Eurasia.
This study, dealing with the question of the impact of climate and extreme weather events on famines, has two objectives. The first objective is to review recent literature on the topic, distinguishing between economic and political science papers aimed at addressing contemporary famine events in the Third World countries, and historical research dealing with famines of the past. The former category of literature is characterized by a tendency to take the connection between the two variables for granted. The latter category, however, tends to exercise more analytical caution, but it still exhibits a degree of environmental determinism. The second objective of the article is to reassess the role and impact of climate and short-term weather anomalies on famines in pre-Industrial societies, in both European and non-European history. At first, it appears that famines went invariably hand-in-hand with climatic changes and anomalies. A closer analysis, however, reveals that those climatic events created environmental shocks (harvest failures and blights), which implied shortages, rather than famines. Whether those shortages were bound to transform into fullfledged famines was determined by nonenvironmental factors: primarily, human institutions and demographic trends. Climate alone, it is argued, is incapable of creating famines. The often unquestioned connection between the two variables appears to be an imaginary cultural and political construct of our era, when the fear of global warming and the awareness of climate change dominate the public and scholarly discourse.
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The present article seeks to identify the nature, extent, and impact of the Great Bovine Pestilence in England and Wales, between 1318 and 1350. The murrain, which killed around 62 per cent of the bovine animals in England and Wales in 1319-20, had a tremendous impact within both the seigniorial and peasant sectors of late medieval agriculture. In particular, the pestilence, which decreased the overall population of dairy cattle, depressed the overall levels of milk supply available for human consumption. Is it possible that the bovine crisis of 1319-20, and the subsequent protein shortage, were instrumental in weakening the immune system of humans and making them prone to the pestilence some 30 years later?
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