Abstract
Climate change is one of the key challenges of our era and it is a threat to sustainable development. Global warming has many meteorological consequences including rising air temperatures across the world. Undoubtedly, human activity has been one of the key factors to global warming followed by increased greenhouse gas emissions which will exacerbate changes in the Earth’s climate variables. So, any research work related to the climate around the world including Iran due to climate change may cause to better understand the cause and effect and make a better adaptation. This study investigates the regional warming in five meteorological stations in central provinces of Iran, based on seasonal changes in precipitation and temperatures over the period of 1960-2017 (study period). The seasonal drought severity based on Palmer index during 1960-2005 was used to monitor the drought intensity in the study areas which are in drought risk situation. The classification of drought severity using Palmer index shows the severe drought intensity in Arak, Qom, Semnan, Tehran and Isfahan respectively in all four seasons, especially during fall and summer. The slight changes in the coefficients of seasonal maximum, minimum and mean temperatures have been resulted. According to these results, the highest maximum (minimum) temperature rise has been calculated for Qom (Tehran) station during spring and winter (fall) seasons ~0.44°C (~0.67°C) in a decade during 1960-2017. However, the highest decrease in precipitation over Arak station has been calculated ~13.8 mm in a decade in winter during study period.
Highlights
Drought is a creeping and silent phenomenon that results from a shortage of rainfall over a long period, usually in one or several months or seasons
Any research work related to the climate around the world including Iran due to climate change may cause to better understand the cause and effect and make a better adaptation
This study investigates the regional warming in five meteorological stations in central provinces of Iran, based on seasonal changes in precipitation and temperatures over the period of 1960-2017
Summary
Drought is a creeping and silent phenomenon that results from a shortage of rainfall over a long period, usually in one or several months or seasons. This phenomenon has a hidden nature, and the duration of its long-term effects and its effects in various sectors, such as agriculture, social, economic, environmental, etc., are very widespread and gradually appear. Anomalies and fluctuations in the meteorological parameters trends such as precipitation and temperature are natural features of the atmospheric circulation (Institute of Meteorology 2008). Unlike drought, which is a permanent and inherent feature of some parts of the world, water shortage is a temporary phenomenon known as lack of water in a region relative to its long-term average. From the point of view of the World Meteorological Organization, an abnormally dry weather period is characterized by a very wide range, a prolonged decline of more than one month, and below the specified precipitation threshold (WMO, 2015)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
