Long term precipitation trends and variability within the Mediterranean region
In this study, the trends and variability of annual precipitation totals and annual rain days over land within the Mediterranean region are analyzed. Long term ground-based observations concerning, on one hand, monthly precipitation totals (1900–2010) and rain days (1965–2010) from 40 meteorological...
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ftdoajarticles:oai:doaj.org/article:4d8e7be9d50149f0860340b336de8b4a 2023-05-15T17:35:52+02:00 Long term precipitation trends and variability within the Mediterranean region C. M. Philandras P. T. Nastos J. Kapsomenakis K. C. Douvis G. Tselioudis C. S. Zerefos 2011-12-01T00:00:00Z https://doi.org/10.5194/nhess-11-3235-2011 https://doaj.org/article/4d8e7be9d50149f0860340b336de8b4a EN eng Copernicus Publications http://www.nat-hazards-earth-syst-sci.net/11/3235/2011/nhess-11-3235-2011.pdf https://doaj.org/toc/1561-8633 https://doaj.org/toc/1684-9981 doi:10.5194/nhess-11-3235-2011 1561-8633 1684-9981 https://doaj.org/article/4d8e7be9d50149f0860340b336de8b4a Natural Hazards and Earth System Sciences, Vol 11, Iss 12, Pp 3235-3250 (2011) Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 Geology QE1-996.5 article 2011 ftdoajarticles https://doi.org/10.5194/nhess-11-3235-2011 2022-12-31T04:55:11Z In this study, the trends and variability of annual precipitation totals and annual rain days over land within the Mediterranean region are analyzed. Long term ground-based observations concerning, on one hand, monthly precipitation totals (1900–2010) and rain days (1965–2010) from 40 meteorological stations within the Mediterranean region were obtained from the Hellenic National Meteorological Service and the World Climate Data and Monitoring Programme (WCDMP) of the World Meteorological Organization. On the other hand, high spatial resolution (0.5° × 0.5°) gridded monthly data CRU TS 3.1 were acquired from the Climatic Research Unit, University of East Anglia, for the period 1901–2009. The two datasets were compared by means of trends and variability, while the influence of the North Atlantic Oscillation (NAO) in the Mediterranean precipitation was examined. In the process, the climatic changes in the precipitation regime between the period 1961–1990 (reference period) and the period 2071–2100 (future climate) were presented using climate model simulations (RACMO2.1/KNMI). The future climate projections were based on SRES A1B. The findings of the analysis showed that statistically significant (95% confidence level) negative trends of the annual precipitation totals exist in the majority of Mediterranean regions during the period 1901–2009, with an exception of northern Africa, southern Italy and western Iberian peninsula, where slight positive trends (not statistically significant at 95% CL) appear. Concerning the annual number of rain days, a pronounced decrease of 20 %, statistically significant (95% confidence level), appears in representative meteorological stations of east Mediterranean, while the trends are insignificant for west and central Mediterranean. Additionally, NAO index was found to be anticorrelated with the precipitation totals and the number of rain days mainly in Spain, southern France, Italy and Greece. These correlations are higher within the rain season (October–March) than the entire ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Natural Hazards and Earth System Sciences 11 12 3235 3250 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 Geology QE1-996.5 C. M. Philandras P. T. Nastos J. Kapsomenakis K. C. Douvis G. Tselioudis C. S. Zerefos Long term precipitation trends and variability within the Mediterranean region |
topic_facet |
Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 Geology QE1-996.5 |
description |
In this study, the trends and variability of annual precipitation totals and annual rain days over land within the Mediterranean region are analyzed. Long term ground-based observations concerning, on one hand, monthly precipitation totals (1900–2010) and rain days (1965–2010) from 40 meteorological stations within the Mediterranean region were obtained from the Hellenic National Meteorological Service and the World Climate Data and Monitoring Programme (WCDMP) of the World Meteorological Organization. On the other hand, high spatial resolution (0.5° × 0.5°) gridded monthly data CRU TS 3.1 were acquired from the Climatic Research Unit, University of East Anglia, for the period 1901–2009. The two datasets were compared by means of trends and variability, while the influence of the North Atlantic Oscillation (NAO) in the Mediterranean precipitation was examined. In the process, the climatic changes in the precipitation regime between the period 1961–1990 (reference period) and the period 2071–2100 (future climate) were presented using climate model simulations (RACMO2.1/KNMI). The future climate projections were based on SRES A1B. The findings of the analysis showed that statistically significant (95% confidence level) negative trends of the annual precipitation totals exist in the majority of Mediterranean regions during the period 1901–2009, with an exception of northern Africa, southern Italy and western Iberian peninsula, where slight positive trends (not statistically significant at 95% CL) appear. Concerning the annual number of rain days, a pronounced decrease of 20 %, statistically significant (95% confidence level), appears in representative meteorological stations of east Mediterranean, while the trends are insignificant for west and central Mediterranean. Additionally, NAO index was found to be anticorrelated with the precipitation totals and the number of rain days mainly in Spain, southern France, Italy and Greece. These correlations are higher within the rain season (October–March) than the entire ... |
format |
Article in Journal/Newspaper |
author |
C. M. Philandras P. T. Nastos J. Kapsomenakis K. C. Douvis G. Tselioudis C. S. Zerefos |
author_facet |
C. M. Philandras P. T. Nastos J. Kapsomenakis K. C. Douvis G. Tselioudis C. S. Zerefos |
author_sort |
C. M. Philandras |
title |
Long term precipitation trends and variability within the Mediterranean region |
title_short |
Long term precipitation trends and variability within the Mediterranean region |
title_full |
Long term precipitation trends and variability within the Mediterranean region |
title_fullStr |
Long term precipitation trends and variability within the Mediterranean region |
title_full_unstemmed |
Long term precipitation trends and variability within the Mediterranean region |
title_sort |
long term precipitation trends and variability within the mediterranean region |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/nhess-11-3235-2011 https://doaj.org/article/4d8e7be9d50149f0860340b336de8b4a |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Natural Hazards and Earth System Sciences, Vol 11, Iss 12, Pp 3235-3250 (2011) |
op_relation |
http://www.nat-hazards-earth-syst-sci.net/11/3235/2011/nhess-11-3235-2011.pdf https://doaj.org/toc/1561-8633 https://doaj.org/toc/1684-9981 doi:10.5194/nhess-11-3235-2011 1561-8633 1684-9981 https://doaj.org/article/4d8e7be9d50149f0860340b336de8b4a |
op_doi |
https://doi.org/10.5194/nhess-11-3235-2011 |
container_title |
Natural Hazards and Earth System Sciences |
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11 |
container_issue |
12 |
container_start_page |
3235 |
op_container_end_page |
3250 |
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