Climate Variability and Drought Management

A special issue of Climate (ISSN 2225-1154).

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 9386

Special Issue Editors


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Guest Editor
Faculty of Geography and Geology, University of Alexandru Ioan Cuza, Iasi, Romania
Interests: hydrology; hydrological risks; water resources management; hydrogeology; rivers; hydrological modelling
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Special Issue Information

Dear Colleagues,

Drought is an extreme natural phenomenon with consequences that endanger not only nature and landscape, but also society. The lack of precipitation with the resulting reduction of water outflow as a primary effect, inevitably, leads to secondary consequences. These include, in particular, problems in the supply of drinking water and electricity, the reduction of industrial and agricultural production, but also the drying up of small streams and springs, the deterioration of natural water quality, and the emergence and spread of forest fires and dust storms, among others. The increased frequency of extreme meteorological and hydrological phenomena is one of the expected impacts of climate change; meteorological and hydrological drought clearly belong to these extreme phenomena. Drought has been the focus of increasing attention after the occurrence of extreme events that affect spatially large areas, often whole continents.

This Special Issue will gather transnational scientific knowledge to identify and develop models and practices for the management of drought resulting from climate variability. Contributions published in this issue will focus on current climate and hydrological issues, addressed by original approaches. Research should focus on drought management, which will contribute to better protection of society and the environment, improve drought prevention and consequent damage, and provide integrated solutions for adaptation to climate change. The Special Issue will generate new knowledge, methods, and procedures of drought management. Proposed measures to mitigate the effects of drought in the context of climate variability are essential, in particular, in sensitive areas. Drought management is one of the decisive and important parts of water resources management as it attempts to transform scientific approaches to obtain strategically relevant information that supports correct decision making and implementation of appropriate environmental protection measures.

Dr. Martina Zelenakova
Prof. Dr. Ionut Minea
Guest Editor

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Keywords

  • drought
  • climate change
  • water resources
  • precipitation
  • hydrology

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Published Papers (2 papers)

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Research

21 pages, 2705 KiB  
Article
Bivariate Modelling of a Teleconnection Index and Extreme Rainfall in a Small North Atlantic Island
by Luis Angel Espinosa, Maria Manuela Portela, João Dehon Pontes Filho and Martina Zelenakova
Climate 2021, 9(5), 86; https://doi.org/10.3390/cli9050086 - 19 May 2021
Cited by 3 | Viewed by 2952
Abstract
This paper explores practical applications of bivariate modelling via copulas of two likely dependent random variables, i.e., of the North Atlantic Oscillation (NAO) coupled with extreme rainfall on the small island of Madeira, Portugal. Madeira, due to its small size (∼740 km2 [...] Read more.
This paper explores practical applications of bivariate modelling via copulas of two likely dependent random variables, i.e., of the North Atlantic Oscillation (NAO) coupled with extreme rainfall on the small island of Madeira, Portugal. Madeira, due to its small size (∼740 km2), very pronounced mountain landscape, and location in the North Atlantic, experiences a wide range of rainfall regimes, or microclimates, which hamper the analyses of extreme rainfall. Previous studies showed that the influence of the North Atlantic Oscillation (NAO) on extreme rainfall is at its largest in the North Atlantic sector, with the likelihood of increased rainfall events from December through February, particularly during negative NAO phases. Thus, a copula-based approach was adopted for teleconnection, aiming at assigning return periods of daily values of an NAO index (NAOI) coupled with extreme daily rainfalls—for the period from December 1967 to February 2017—at six representative rain gauges of the island. The results show that (i) bivariate copulas describing the dependence characteristics of the underlying joint distributions may provide useful analytical expressions of the return periods of the coupled previous NAOI and extreme rainfall and (ii) that recent years show signs of increasing climate variability with more anomalous daily negative NAOI along with higher extreme rainfall events. These findings highlight the importance of multivariate modelling for teleconnections of prominent patterns of climate variability, such as the NAO, to extreme rainfall in North Atlantic regions, especially in small islands that are highly vulnerable to the effects of abrupt climate variability. Full article
(This article belongs to the Special Issue Climate Variability and Drought Management)
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18 pages, 3429 KiB  
Article
Long-Term Rainfall Trends and Their Variability in Mainland Portugal in the Last 106 Years
by Maria Manuela Portela, Luis Angel Espinosa and Martina Zelenakova
Climate 2020, 8(12), 146; https://doi.org/10.3390/cli8120146 - 10 Dec 2020
Cited by 24 | Viewed by 5480
Abstract
This study addresses the long-term rainfall trends, their temporal variability and uncertainty over mainland Portugal, a small country on the most western European coast. The study was based on monthly, seasonal and annual rainfall series spanning for a period of 106 years, between [...] Read more.
This study addresses the long-term rainfall trends, their temporal variability and uncertainty over mainland Portugal, a small country on the most western European coast. The study was based on monthly, seasonal and annual rainfall series spanning for a period of 106 years, between October 1913 and September 2019 (herein after referred to as global period), at 532 rain gauges evenly distributed over the country (c.a. 6 rain gauges per 1000 km2). To understand the rainfall behavior over time, an initial sub-period with 55 years and a final sub-period with 51 years were also analyzed along with the global period. The trends identification and the assessment of their magnitude were derived using the nonparametric Mann-Kendall (MK) test coupled with the Sen’s slope estimator method. The results showed that after the initial sub-period with prevailing increasing rainfall, the trends were almost exclusively decreasing. They were also so pronounced that they counterbalanced the initial rainfall increase and resulted in equally decreasing trends for the global period. The study also shows that approximately from the late 1960s on, the rainy season pattern has changed, with the last months prior to the dry season showing a sustained decrease of their relative contributions to the annual rainfalls. Overall, the results support the hypothesis of less uncertainty on the pronounced decrease of rainfall over mainland Portugal in recent years, which is expected to continue. They also show that the asymmetry between a less wet North, yet still wet, and an arid South is becoming much more marked. Full article
(This article belongs to the Special Issue Climate Variability and Drought Management)
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