Volume 29, Issue 1
Research Article
Free Access

Iberia in 1816, the year without a summer

Ricardo M. Trigo

Corresponding Author

E-mail address: rmtrigo@fc.ul.pt

Centro de Geofísica da Universidade de Lisboa, Lisbon, Portugal

Departamento de Engineering Civil da Universidade Lusófona, Lisbon, Portugal

Centro de Geofísica da Universidade de Lisboa, Departamento de Física, Faculdade de Ciências, Campo Grande, Ed C8, Piso 6, 1749‐016 Lisbon, Portugal.Search for more papers by this author
José M. Vaquero

Departamento de Física Aplicada, Escuela Politécnica, Universidad de Extremadura, Avda. de la Universidad s/n, 10071 Cáceres, Spain

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Maria‐João Alcoforado

Centro de Estudos Geográficos, Universidade de Lisboa, Portugal

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Mariano Barriendos

Departamento de Historia Moderna, Universidad de Barcelona, Spain

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João Taborda

Escola Secundária Gabriel Pereira, Évora, Portugal

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Ricardo García‐Herrera

Dto. Física de la Tierra II, Facultad de Físicas, Universidad Complutense, Spain

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Juerg Luterbacher

Oeschger Centre for Climate Change Research and National Centre of Competence in Research on Climate (NCCR), University of Bern, Bern, Switzerland

Institute of Geography, Climatology and Meteorology, University of Bern, Bern, Switzerland

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First published: 15 April 2008
Citations: 55

Abstract

The year 1816 was characterized by unusual weather conditions, in particular, by a cold and wet summer season (‘year without a summer’) on both the European and North American continents. The eruption of Tambora, an active stratavolcano, on the Island of Sumbaya (Indonesia) in April 1815 has been identified as the main driving force for the strong 1816 temperature anomaly. This climate anomaly has been relatively well studied in central Europe, France, Scandinavia and the United Kingdom. The unusual unsettled weather and climate at mid‐latitudes in 1816 and 1817 had major socio‐economic impacts, particularly in terms of a poor yield of agricultural production, malnutrition and consequentially an increased potential for diseases and epidemics. The Iberian Peninsula was also affected by the intense climate anomalies during those years. Documentary sources describe the impact that the cold and wet summer of 1816 had on agriculture, namely the bad quality of fruits, delayed ripening of vineyards and cereals.

It is within this context that we stress the relevance of recently recovered meteorological observed data, from 1816 onwards, for stations located in Portugal (Lisbon) and also for a longer period for the Spanish stations of Madrid, Barcelona and San Fernando‐Cadiz. We have compared observed (station‐based) and large‐scale reconstructed seasonal temperature anomalies computed for the winter and summer seasons after the eruption (1816–1818). There is qualitative agreement between the two independent data sets, though some stations partly indicate stronger departures from the long‐term averages for single years compared to neighbouring grid points. In particular, all available stations reveal a cold summer of 1816, mainly in July and August. In comparison to the 1871–1900 reference period, those two months were 2–3 °C cooler, close to what has been reported for central Europe. We also discuss the regional climate anomalies for those years (1816–1818) using independently reconstructed atmospheric circulation fields. Copyright © 2008 Royal Meteorological Society

Number of times cited according to CrossRef: 55

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