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  • 1
    Publication Date: 2022-10-13
    Description: Observation‐based and modeling studies have identified the Eastern Mediterranean and Middle East (EMME) region as a prominent climate change hotspot. While several initiatives have addressed the impacts of climate change in parts of the EMME, here we present an updated assessment, covering a wide range of timescales, phenomena and future pathways. Our assessment is based on a revised analysis of recent observations and projections and an extensive overview of the recent scientific literature on the causes and effects of regional climate change. Greenhouse gas emissions in the EMME are growing rapidly, surpassing those of the European Union, hence contributing significantly to climate change. Over the past half‐century and especially during recent decades, the EMME has warmed significantly faster than other inhabited regions. At the same time, changes in the hydrological cycle have become evident. The observed recent temperature increase of about 0.45°C per decade is projected to continue, although strong global greenhouse gas emission reductions could moderate this trend. In addition to projected changes in mean climate conditions, we call attention to extreme weather events with potentially disruptive societal impacts. These include the strongly increasing severity and duration of heatwaves, droughts and dust storms, as well as torrential rain events that can trigger flash floods. Our review is complemented by a discussion of atmospheric pollution and land‐use change in the region, including urbanization, desertification and forest fires. Finally, we identify sectors that may be critically affected and formulate adaptation and research recommendations toward greater resilience of the EMME region to climate change.
    Description: Key Points: The Eastern Mediterranean and Middle East is warming almost two times faster than the global average and other inhabited parts of the world. Climate projections indicate a future warming, strongest in summers. Precipitation will likely decrease, particularly in the Mediterranean. Virtually all socio‐economic sectors will be critically affected by the projected changes.
    Description: European Union Horizon 2020
    Description: https://esg-dn1.nsc.liu.se/search/esgf-liu/
    Keywords: ddc:551.6
    Language: English
    Type: doc-type:article
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  • 2
    Publication Date: 2012-03-16
    Description: The statistical relationships among the various 10°–70°E mid-latitude blocking anticyclone parameters and the weather of the Arabian Peninsula (AP) (35°–60°E, 12°–32°N) over a 40-year period (1968-2007), on seasonal, interannual, decadal and long-term scales, are studied. The studied parameters include the number of blocking anticyclone events, the duration, the intensity, and the longitude at the blocking anticyclone onset. It is found that 31% of the Northern Hemisphere mid-latitude blocking anticyclone events occurred over the 10°–70°E longitudes, and out of these, the maximum number of mid-latitude blocking anticyclone event onsets are at 30°E (24%). On the seasonal basis, the annual and decadal relationships of the 10°–70° blocking anticyclones with the El-Niño Southern Oscillation (ENSO), the North Atlantic Oscillation (NAO) and the Arctic Oscillation (AO) indices are presented. The results show that the number of days the blocking anticyclones persists is sensitive to the ENSO phase. The mid-latitude blocking anticyclone occurrence over the 10°–70°E longitudes is indicative of the reduced surface temperature variance, both upstream and downstream, during the blocking anticyclone period, over the AP. A shift in the mean surface temperature distribution occurs, in all seasons, during the blocking anticyclone period. The blocking anticyclones initiate a surface temperature change (both positive and negative) that persists even after the blocking anticyclone's decay. The AP surface weather during the months of October, November, and December is affected more by the occurrence of mid-latitude blocking anticyclones over the 10°–70°E longitudes in the presence the of El-Niño phase. Copyright © 2012 Royal Meteorological Society
    Print ISSN: 0899-8418
    Electronic ISSN: 1097-0088
    Topics: Geosciences , Physics
    Published by Wiley
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  • 3
    Publication Date: 2012-04-15
    Description: The statistical relationships among the various 10°–70°E mid-latitude blocking anticyclone parameters and the weather of the Arabian Peninsula (AP) (35°–60°E, 12°–32°N) over a 40-year period (1968-2007), on seasonal, interannual, decadal and long-term scales, are studied. The studied parameters include the number of blocking anticyclone events, the duration, the intensity, and the longitude at the blocking anticyclone onset. It is found that 31% of the Northern Hemisphere mid-latitude blocking anticyclone events occurred over the 10°–70°E longitudes, and out of these, the maximum number of mid-latitude blocking anticyclone event onsets are at 30°E (24%). On the seasonal basis, the annual and decadal relationships of the 10°–70° blocking anticyclones with the El-Niño Southern Oscillation (ENSO), the North Atlantic Oscillation (NAO) and the Arctic Oscillation (AO) indices are presented. The results show that the number of days the blocking anticyclones persists is sensitive to the ENSO phase. The mid-latitude blocking anticyclone occurrence over the 10°–70°E longitudes is indicative of the reduced surface temperature variance, both upstream and downstream, during the blocking anticyclone period, over the AP. A shift in the mean surface temperature distribution occurs, in all seasons, during the blocking anticyclone period. The blocking anticyclones initiate a surface temperature change (both positive and negative) that persists even after the blocking anticyclone's decay. The AP surface weather during the months of October, November, and December is affected more by the occurrence of mid-latitude blocking anticyclones over the 10°–70°E longitudes in the presence the of El-Niño phase. Copyright © 2012 Royal Meteorological Society
    Print ISSN: 0899-8418
    Electronic ISSN: 1097-0088
    Topics: Geosciences , Physics
    Published by Wiley
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  • 4
    Publication Date: 2012-04-15
    Description: The rainfall and temperature climatology over the Arabian Peninsula are analysed on an annual basis using various gridded datasets. For Saudi Arabia, the area of which represents almost 80% of the Peninsula, the climatic datasets from its 27 ground observations are analysed for the period 1978–2009, with additional gridded datasets used to describe the observed state and change of the present climate. The gridded datasets represent well the very dry (40–80 mm) area over the world's largest sand desert (Rub Al-Khali), the dry (80–150 mm) area over middle-to-north of Saudi Arabia, and the wettest (〉150 mm) region in the southwest of the Peninsula. The annual temperature is relatively high (24–27 °C) in the middle-to-south of the Peninsula and low (〈21 °C) in the northwest and southwest. The highest temperature (〉27 °C) is obtained over the Rub Al-Khali. Over Saudi Arabia, the observed annual rainfall showed a significant decreasing trend (47.8 mm per decade) in the last half of the analysis period, with a relatively large interannual variability, while the maximum, mean and minimum temperatures have increased significantly at a rate of 0.71, 0.60, and 0.48 °C per decade, respectively. This information is invaluable to consider in any climate impact assessment studies in Saudi Arabia. Copyright © 2012 Royal Meteorological Society
    Print ISSN: 0899-8418
    Electronic ISSN: 1097-0088
    Topics: Geosciences , Physics
    Published by Wiley
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  • 5
    Publication Date: 2012-03-07
    Description: The rainfall and temperature climatology over the Arabian Peninsula are analysed on an annual basis using various gridded datasets. For Saudi Arabia, the area of which represents almost 80% of the Peninsula, the climatic datasets from its 27 ground observations are analysed for the period 1978–2009, with additional gridded datasets used to describe the observed state and change of the present climate. The gridded datasets represent well the very dry (40–80 mm) area over the world's largest sand desert (Rub Al-Khali), the dry (80–150 mm) area over middle-to-north of Saudi Arabia, and the wettest (〉150 mm) region in the southwest of the Peninsula. The annual temperature is relatively high (24–27 °C) in the middle-to-south of the Peninsula and low (〈21 °C) in the northwest and southwest. The highest temperature (〉27 °C) is obtained over the Rub Al-Khali. Over Saudi Arabia, the observed annual rainfall showed a significant decreasing trend (47.8 mm per decade) in the last half of the analysis period, with a relatively large interannual variability, while the maximum, mean and minimum temperatures have increased significantly at a rate of 0.71, 0.60, and 0.48 °C per decade, respectively. This information is invaluable to consider in any climate impact assessment studies in Saudi Arabia. Copyright © 2012 Royal Meteorological Society
    Print ISSN: 0899-8418
    Electronic ISSN: 1097-0088
    Topics: Geosciences , Physics
    Published by Wiley
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  • 6
    Publication Date: 2015-04-03
    Description: ABSTRACT An endeavour is made to investigate the performance of convective parameterization schemes on the simulation of South Asian summer monsoon features through a regional climate model (RegCM). For this purpose, RegCM version 4.3 developed by International Center for Theoretical Physics (ICTP) is used for the simulation experiments in the Coordinated Regional Climate Downscaling Experiment (CORDEX) framework over the South Asia domain. Four convective schemes, namely, Emanuel, Grell, Tiedtke and a mixed scheme (Emanuel over land and Grell over the ocean) are evaluated in RegCM4.3 at 45 km horizontal resolution. The simulated results of precipitation, temperature and wind fields are systematically evaluated respectively with Tropical Rainfall Measurement Mission (TRMM), Climate Research Unit (CRU) and ECMWF re-analysis (ERA) Interim datasets. The results reveal that the response of a mixed convective scheme is better in simulating precipitation and temperature realistically over the Indian subcontinent and is in close agreement with the TRMM observations, compared with the three other schemes. The circulation features are also properly represented with the mixed convection scheme. Furthermore, the annual cycle of precipitation and temperature averaged over the Indian region are well estimated in the mixed scheme, compared with the CRU observations. The northward propagation of monsoon intra-seasonal oscillations in extreme monsoon seasons is simulated reasonably in a mixed convection scheme as compared with three other schemes. The inter-annual variability of area averaged JJAS precipitation over the Indian region is simulated well by the model for the combination of Emanuel over land and Grell over the ocean. Grell scheme overestimates the JJAS precipitation, whereas Emanual and Tiedtke schemes underestimate it.
    Print ISSN: 0899-8418
    Electronic ISSN: 1097-0088
    Topics: Geosciences , Physics
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  • 7
    Publication Date: 2012-09-20
    Description: ABSTRACT The interannual rainfall variability derived from the 22 Global Climate Model (GCM) simulations of the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) for the duration 1979–2000 is analysed and compared with the gridded observed dataset over the Arabian Peninsula. The annual cycle of the rainfall derived from these models is validated for the entire Arabian Peninsula, and separately for its two sub-regions, named northern and southern Arabian Peninsula. The spatial patterns of the rainfall and the mean sea level pressure are analysed to judge the ability of the models to simulate the mean climatology of the Peninsula. This analysis reveals that out of the 22 IPCC AR4 GCM multi-model datasets, only one group (composed of 5 models) is relatively better than all the others in simulating the interannual variability of the wet season rainfall for the northern sub-region, and another group (also composed of 5 models) is likewise for the dry season rainfall climatology of the southern sub-region, compared with the gridded dataset. The above two groups of models tend to fall within one-sigma standard deviation of the mean seasonal rainfall derived from the gridded dataset. Moreover, only one model [CCCMA-CGCM3 (T47) from Canada] is found to be relatively better in simulating the rainfall climatology for both the wet and the dry seasons (i.e. for the northern and the southern sub-regions) simultaneously, compared with the observed data. Copyright © 2012 Royal Meteorological Society
    Print ISSN: 0899-8418
    Electronic ISSN: 1097-0088
    Topics: Geosciences , Physics
    Published by Wiley
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  • 8
    Publication Date: 2013-05-29
    Description: ABSTRACT In characterizing the patterns of climate change across Saudi Arabia, several extreme indices are calculated from station values daily maximum and minimum temperature data. The trend analyses are performed on 13 annual extreme indices for Saudi Arabia, using observations from 27 surface stations with high-quality data for the period 1981–2010. RClimDex is used to calculate the indices, and simple regression methods are employed for the trend analysis. The analyses of extreme temperature indices detected a significant increase in the majority of the stations, which further indicates that the country has experienced a warming trend. The findings show that 92/89% of the stations displayed a significant increase in the annual occurrence of warm days/nights and 96/93% revealed a significant decrease for the occurrence of cool days/nights. Time-series analysis has also shown an important feature of the climate change signal. When the dataset is divided into two sub-periods, the analysis reveals a distinctive long-term trend that clearly distinguishes the two periods. It was found that the temperature extremes (hot and cold) in Saudi Arabia have increased significantly with greater magnitude in the recent-past (1996–2010) compared to the previous period (1981–1995). The most telling evidence for this is the heat- and cold-waves, where indices of both have occurred more frequently in the second part of the two sub-periods. © 2013 The Authors. International Journal of Climatology published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society
    Print ISSN: 0899-8418
    Electronic ISSN: 1097-0088
    Topics: Geosciences , Physics
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  • 9
    Publication Date: 2016-05-01
    Print ISSN: 1866-7511
    Electronic ISSN: 1866-7538
    Topics: Geosciences
    Published by Springer
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  • 10
    Publication Date: 2016-05-01
    Print ISSN: 1866-7511
    Electronic ISSN: 1866-7538
    Topics: Geosciences
    Published by Springer
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