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1,474 Results Found

  • Article
  • Open Access
4 Citations
3,745 Views
28 Pages

Inter-Annual and Seasonal Variability of Flows: Delivering Climate-Smart Environmental Flow Reference Values

  • Sergio A. Salinas-Rodríguez,
  • Nick C. van de Giesen and
  • Michael E. McClain

6 May 2022

Environmental flow (eflow) reference values play a key role in environmental water science and practice. In Mexico, eflow assessments are set by a norm in which the frequency of occurrence is the managing factor to integrate inter-annual and seasonal...

  • Article
  • Open Access
10 Citations
4,145 Views
12 Pages

2 October 2019

The inter-annual variability of boreal summer intra-seasonal oscillation (BSISO) propagation from the Indian Ocean (IO) to the western Pacific (WP) is investigated for the boreal summers (May to September) of 1979–2018. It is shown that the int...

  • Article
  • Open Access
128 Citations
10,452 Views
10 Pages

Innovative Trend Analysis of Annual and Seasonal Rainfall Variability in Amhara Regional State, Ethiopia

  • Mohammed Gedefaw,
  • Denghua Yan,
  • Hao Wang,
  • Tianling Qin,
  • Abel Girma,
  • Asaminew Abiyu and
  • Dorjsuren Batsuren

21 August 2018

This study investigated the annual and seasonal rainfall variability at five selected stations of Amhara Regional State, by using the innovative trend analysis method (ITAM), Mann-Kendall (MK) and Sen’s slope estimator test. The result showed t...

  • Article
  • Open Access
11 Citations
5,677 Views
23 Pages

7 September 2021

Riverscapes are complex ecosystems consisting of dynamic processes influenced by spatially heterogeneous physical features. A critical component of riverscapes is vegetation in the stream channel and floodplain, which influences flooding and provides...

  • Article
  • Open Access
38 Citations
10,092 Views
18 Pages

1 October 2019

In some parts of Africa, rainfall variability has resulted in widespread droughts and floods, thus posing a substantial challenge to water availability in rural areas, especially drinking water. Therefore, due to increasing water demands, increases i...

  • Article
  • Open Access
8 Citations
4,572 Views
23 Pages

Seasonal and Inter-Annual Variability of the Phytoplankton Dynamics in the Black Sea Inner Basin

  • Svetla Miladinova,
  • Adolf Stips,
  • Diego Macias Moy and
  • Elisa Garcia-Gorriz

20 October 2020

We explore the patterns of Black Sea phytoplankton growth as driven by the thermohaline structure and circulation system and the freshwater nutrient loads. Seasonal and inter-annual variability of the phytoplankton blooms is examined using hydrodynam...

  • Article
  • Open Access
107 Views
27 Pages

7 January 2026

This study examines the post-war evolution of groundwater quality in Mosul by evaluating the seasonal and annual behavior of physicochemical parameters and heavy metals, while differentiating the responses of shallow and deep aquifers and determining...

  • Article
  • Open Access
54 Citations
11,989 Views
24 Pages

Assessment of Long-Term Spatio-Temporal Rainfall Variability over Ghana using Wavelet Analysis

  • Michael Baidu,
  • Leonard K. Amekudzi,
  • Jeffery N. A. Aryee and
  • Thompson Annor

31 March 2017

Rainfall variability has strong impact on food security, livelihood and socio-economic activities as farming in West Africa is mainly rain-fed. The annual, seasonal and decadal rainfall variability over Ghana has been studied and their periodicities...

  • Article
  • Open Access
37 Citations
10,509 Views
16 Pages

MERIS Phytoplankton Time Series Products from the SW Iberian Peninsula (Sagres) Using Seasonal-Trend Decomposition Based on Loess

  • Sónia Cristina,
  • Clara Cordeiro,
  • Samantha Lavender,
  • Priscila Costa Goela,
  • John Icely and
  • Alice Newton

26 May 2016

The European Space Agency has acquired 10 years of data on the temporal and spatial distribution of phytoplankton biomass from the MEdium Resolution Imaging Spectrometer (MERIS) sensor for ocean color. The phytoplankton biomass was estimated with the...

  • Article
  • Open Access
9 Citations
5,678 Views
17 Pages

Variabilities and Trends of Rainfall, Temperature, and River Flow in Sipi Sub-Catchment on the Slopes of Mt. Elgon, Uganda

  • Justine Kilama Luwa,
  • Jackson-Gilbert Mwanjalolo Majaliwa,
  • Yazidhi Bamutaze,
  • Isa Kabenge,
  • Petter Pilesjo,
  • George Oriangi and
  • Espoir Bagula Mukengere

30 June 2021

The variabilities in rainfall and temperature in a catchment affect water availability and sustainability. This study assessed the variabilities in rainfall and temperature (1981–2015) and river flow (1998–2015) in the Sipi sub-catchment on annual an...

  • Review
  • Open Access
115 Citations
13,826 Views
24 Pages

High Variability Is a Defining Component of Mediterranean-Climate Rivers and Their Biota

  • Núria Cid,
  • Núria Bonada,
  • Stephanie M. Carlson,
  • Theodore E. Grantham,
  • Avital Gasith and
  • Vincent H. Resh

17 January 2017

Variability in flow as a result of seasonal precipitation patterns is a defining element of streams and rivers in Mediterranean-climate regions of the world and strongly influences the biota of these unique systems. Mediterranean-climate areas includ...

  • Article
  • Open Access
884 Views
41 Pages

19 September 2025

Based on long-term series of observations of water flow of 22 small and medium-sized rivers in the forest-steppe and steppe east of the East European Plain, an analysis of its trend changes in 1961–2022, i.e., in the time interval of the Anthro...

  • Article
  • Open Access
4 Citations
2,460 Views
19 Pages

The extreme significant wave height predictions often neglect within-year wave climate variability and wave directionality. Depending on a geographical region, local wind patterns and year climate variability could have an influence on the long-term...

  • Article
  • Open Access
107 Citations
11,206 Views
20 Pages

1 January 2019

Extensive animal production in Iberian Peninsula is based on pastures, integrated within the important agro-silvo-pastoral system, named “montado” in Portugal and “dehesa” in Spain. Temperature and precipitation are the main d...

  • Article
  • Open Access
8 Citations
2,262 Views
15 Pages

2 February 2023

Soil structure and its change are good indicators for soil quality and environmental stability, and land-use change is known to be an important factor that affects soil structure. We investigated the seasonal and temporal variability in the soil stru...

  • Article
  • Open Access
2 Citations
1,378 Views
15 Pages

Annual and Seasonal Variability of Trichloromethane in Drinking Water of Kunshan City 2016–2022 and Associated Health Risks

  • Xiaojun Liang,
  • Guohua Qian,
  • Yihan Wang,
  • Mengyao Chen,
  • Yang Liu,
  • Ping Zhao,
  • Junling Li,
  • Yuan Wang and
  • Yuyan Liu

28 November 2024

This study aimed to evaluate the annual pollution characteristics of trichloromethane (TCM) in Kunshan City’s tap water from 2016 to 2022. This research analyzed 566 tap water samples from centralized water supply units, utilizing the GB 5749-2...

  • Article
  • Open Access
37 Citations
6,106 Views
28 Pages

24 July 2018

Several long-term monitoring of aerosol datasets from the Moderate Resolution Imaging Spectroradiometer (MODIS) on board Terra/Aqua, Multi-angle Imaging SpectroRadiometer (MISR), Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) were used to derive the...

  • Feature Paper
  • Review
  • Open Access
121 Citations
11,425 Views
28 Pages

Wave Energy Resource Assessment for Exploitation—A Review

  • Nicolas Guillou,
  • George Lavidas and
  • Georges Chapalain

11 September 2020

Over recent decades, the exploitation of wave energy resources has sparked a wide range of technologies dedicated to capturing the available power with maximum efficiency, reduced costs, and minimum environmental impacts. These different objectives a...

  • Article
  • Open Access
9 Citations
4,358 Views
27 Pages

Wave Energy in Brittany (France)—Resource Assessment and WEC Performances

  • Nicolas Guillou,
  • George Lavidas and
  • Bahareh Kamranzad

16 January 2023

Refined numerical wave energy resource assessments are required to reduce uncertainties in the evaluation of available power and energy production. However, to restrict the computational cost, a great part of wave hindcast simulations cover a limited...

  • Article
  • Open Access
40 Citations
5,064 Views
23 Pages

20 January 2020

Climate change and human activities have profound effects on the characteristics of groundwater in arid oases. Analyzing the change of groundwater level and quantifying the contributions of influencing factors are essential for mastering the groundwa...

  • Article
  • Open Access
16 Citations
4,453 Views
26 Pages

16 October 2023

Extreme climate change events are major causes of devastating impacts on socioeconomic well-being and ecosystem damage. Therefore, understanding the performance of appropriate climate models representing local climate characteristics is critical for...

  • Article
  • Open Access
1,511 Views
17 Pages

Hydro-Climatic Trends in Central Italy: A Case Study from the Aterno-Pescara River Watershed

  • Mohsin Tariq,
  • Eleonora Aruffo,
  • Piero Chiacchiaretta and
  • Piero Di Carlo

10 January 2025

Climate change is reshaping water systems and trends in hydro-climatic variables, such as temperature, precipitation, and river runoff, providing critical insights into the hydrological shifts influenced by climate change. However, the impact of clim...

  • Article
  • Open Access
44 Citations
4,966 Views
14 Pages

10 August 2018

The aim of this study was to detect trends in maximum annual daily precipitation in the Upper Vistula Basin. We analyzed data from 51 weather stations between 1971 and 2014. Then we used the Mann–Kendall test to detect monotonical trends of the...

  • Article
  • Open Access
54 Citations
11,151 Views
16 Pages

23 March 2018

Understanding temporal and spatial characteristics of regional climate is essential for decision making in water resource management. Established statistical and GIS techniques were used to evaluate annual and seasonal variations of rainfall and temp...

  • Article
  • Open Access
134 Citations
21,115 Views
21 Pages

6 April 2017

The Mediterranean climate is principally characterized by warm, dry summers and cool, wet winters. However, there are large variations in precipitation dynamics in regions with this climate type. We examined the variability of precipitation within an...

  • Article
  • Open Access
2 Citations
1,791 Views
20 Pages

29 October 2023

The purpose of this study was to analyze the influence of solar activity described by the sunspot number (SSN) on certain terrestrial variables that might impact the Southeastern European climate at different spatio-temporal scales (the North Atlanti...

  • Article
  • Open Access
1 Citations
1,245 Views
28 Pages

Freshwater availability in Pacific equatorial atolls is highly variable because of the influence of El Niño–Southern Oscillation (ENSO) on rainfall. IPCC projections for the central and western tropical Pacific suggest annual rainfall (P...

  • Article
  • Open Access
62 Citations
8,134 Views
15 Pages

Evaluation of Vegetation Indices and Phenological Metrics Using Time-Series MODIS Data for Monitoring Vegetation Change in Punjab, Pakistan

  • Pingbo Hu,
  • Alireza Sharifi,
  • Muhammad Naveed Tahir,
  • Aqil Tariq,
  • Lili Zhang,
  • Faisal Mumtaz and
  • Syed Hassan Iqbal Ahmad Shah

17 September 2021

In arid and semi-arid regions, it is essential to monitor the spatiotemporal variability and dynamics of vegetation. Among other provinces of Pakistan, Punjab has produced a significant number of crops. Recently, Punjab, Pakistan, has been described...

  • Article
  • Open Access
41 Citations
4,965 Views
19 Pages

Spatio-Temporal Vegetation Dynamic and Persistence under Climatic and Anthropogenic Factors

  • Barjeece Bashir,
  • Chunxiang Cao,
  • Shahid Naeem,
  • Mehdi Zamani Joharestani,
  • Xie Bo,
  • Huma Afzal,
  • Kashif Jamal and
  • Faisal Mumtaz

13 August 2020

Land degradation reflected by vegetation is a commonly used practice to monitor desertification. To retrieve important information for ecosystem management accurate assessment of desertification is necessary. The major factors that drive vegetation d...

  • Article
  • Open Access
105 Citations
10,816 Views
17 Pages

Analysis of Climate Variability and Trends in Southern Ethiopia

  • Abrham Belay,
  • Teferi Demissie,
  • John W. Recha,
  • Christopher Oludhe,
  • Philip M. Osano,
  • Lydia A. Olaka,
  • Dawit Solomon and
  • Zerihun Berhane

15 June 2021

This study investigated the trends and variability of seasonal and annual rainfall and temperature data over southern Ethiopia using time series analysis for the period 1983–2016. Standard Anomaly Index (SAI), Coefficient of Variation (CV), Precipita...

  • Article
  • Open Access
19 Citations
6,964 Views
27 Pages

15 September 2015

The aim of this study is to describe and understand the seasonal and inter-annual physical and biological dynamics of the inner and mid shelves of the Southwestern Buenos Aires Province (Argentina). We used chlorophyll-a (chl-a) concentrations and in...

  • Article
  • Open Access
53 Citations
12,276 Views
26 Pages

Mean Sea Level Variability and Influence of the North Atlantic Oscillation on Long-Term Trends in the German Bight

  • Sönke Dangendorf,
  • Thomas Wahl,
  • Hartmut Hein,
  • Jürgen Jensen,
  • Stephan Mai and
  • Christoph Mudersbach

24 February 2012

Changes in the seasonal cycle of mean sea level (MSL) may affect the heights of storm surges and thereby flood risk in coastal areas. This study investigates the intra- and inter-annual variability of monthly MSL and its link to the North Atlantic Os...

  • Article
  • Open Access
12 Citations
8,418 Views
32 Pages

Patterns in historical climate data were analyzed for Ottawa, Ontario, Canada, for the interval 1890–2019. Variables analyzed included records of annual, seasonal, and extreme temperature and precipitation, diurnal temperature range, and variou...

  • Article
  • Open Access
11 Citations
8,115 Views
32 Pages

13 November 2014

Variability in snow melt onset (MO) on Arctic sea ice since 1979 is examined by determining the area of sea ice experiencing the onset of melting during the melt season on a daily basis. The daily MO area of the snow and ice surface is determined fro...

  • Article
  • Open Access
7 Citations
2,272 Views
21 Pages

20 July 2023

The vegetation on the Tibetan Plateau (TP), as a major component of the land–atmosphere interaction, affects the TP thermal conditions. And, as a direct climatic factor of vegetation, precipitation over the TP is significantly regulated by the...

  • Article
  • Open Access
6 Citations
4,068 Views
14 Pages

6 November 2023

This study explores spatial and temporal changes in the rainfall climatology of Puerto Rico in order to identify areas where annual, seasonal or daily precipitation is increasing, decreasing, or remaining normal. Total annual, seasonal, and daily rai...

  • Article
  • Open Access
21 Citations
5,297 Views
14 Pages

1 December 2017

The spatial and temporal variability of precipitation time series were investigated for the Hexi Corridor, in Northwest China, by analyzing the entropy information. The examinations were performed on monthly, seasonal, and annual timescales based on...

  • Article
  • Open Access
12 Citations
4,128 Views
22 Pages

Rainfall Spatial-Temporal Variability and Trends in the Thamirabharani River Basin, India: Implications for Agricultural Planning and Water Management

  • Shanmugam Mohan Kumar,
  • Vellingiri Geethalakshmi,
  • Subbiah Ramanathan,
  • Alagarsamy Senthil,
  • Kandasamy Senthilraja,
  • Kulanthaivel Bhuvaneswari,
  • Ramasamy Gowtham,
  • Balaji Kannan and
  • Shanmugavel Priyanka

11 November 2022

Rainfall is critical to agricultural and drinking water supply in the Thamirabharani river basin. The upper catchment areas of the Thamirabharani basin are located in high-elevated forest regions, and rainfall variability affects dam inflow and outfl...

  • Article
  • Open Access
3 Citations
3,940 Views
19 Pages

24 December 2020

Extreme climate events are typically defined based on the statistical distributions of climatic variables; their ecological significance is often ignored. In this study, precipitation and temperature data from 78 weather stations spanning from 1960 t...

  • Communication
  • Open Access
7 Citations
2,259 Views
9 Pages

Climatic Drivers of Silicon Accumulation in a Model Grass Operate in Low- but Not High-Silicon Soils

  • Scott N. Johnson,
  • Rebecca K. Vandegeer,
  • Justin O. Borevitz,
  • Susan E. Hartley,
  • David T. Tissue and
  • Casey R. Hall

22 February 2023

Grasses are hyper-accumulators of silicon (Si), which is known to alleviate diverse environmental stresses, prompting speculation that Si accumulation evolved in response to unfavourable climatic conditions, including seasonally arid environments. We...

  • Article
  • Open Access
3,359 Views
22 Pages

Evaluation of Rainfall Distribution Based on the Precipitation Concentration Index: A Case Study over the Selected Summer Rainfall Regions of South Africa

  • Christina M. Botai,
  • Joel O. Botai,
  • Mxolisi B. Mukhawana,
  • Jaco de Wit,
  • Ndumiso S. Masilela,
  • Nosipho Zwane and
  • Henerica Tazvinga

The Precipitation Concentration Index (PCI) is considered a powerful tool that can be used to analyse the spatial and temporal distribution and variability of precipitation over a region. It plays a significant role in planning and managing water res...

  • Article
  • Open Access
10 Citations
3,889 Views
15 Pages

Fluctuations of Winter Floods in Small Austrian and Ukrainian Catchments

  • Tetiana Zabolotnia,
  • Juraj Parajka,
  • Liudmyla Gorbachova,
  • Borbála Széles,
  • Günter Blöschl,
  • Oleksandr Aksiuk,
  • Rui Tong and
  • Jürgen Komma

17 February 2022

Studying the changes in extreme river runoff induced by climate change is of utmost importance, as the variability of floods directly affects life and human activities. This study examines the fluctuations and persistence of winter floods in 14 catch...

  • Article
  • Open Access
11 Citations
2,804 Views
20 Pages

23 January 2023

It is critical to understand how meteorological variables impact reference evapotranspiration (ETo) since meteorological variables have a different effect on ETo. This study examined the impact of meteorological variables on ETo on the Korean Peninsu...

  • Article
  • Open Access
1,464 Views
22 Pages

3 April 2025

This study explores rainfall variability and trends in the Enkangala Escarpment of South Africa using station data from 1972 to 2022 (51 years). The coefficient of variation (CV) is indicative of pronounced inter-annual variability in seasonal rainfa...

  • Article
  • Open Access
18 Citations
4,909 Views
15 Pages

8 January 2019

Changes in extreme precipitation are critical to assess the potential impacts of climate change on human and natural systems. This paper provides a comprehensive investigation on the multi-scale temporal variability of extreme precipitation in the So...

  • Article
  • Open Access
2,217 Views
12 Pages

Independent Predictors of Mycoplasma pneumoniae Infection: A Retrospective Cohort Study Among Hospitalized Adults in an East Texas Health Facility

  • Menkeoma Laura Okoli,
  • Ibuchim Chinemerem Okoli,
  • Abuoma Chisom Okoli,
  • Ikechukwu Umezurike and
  • Celestine Ishiekwene

8 August 2025

Background: Community-acquired pneumonia in the United States accounts for over five million cases annually, with an estimated one million hospitalizations. About two million of these annual cases and over 100,000 annual hospitalizations are caused b...

  • Article
  • Open Access
5 Citations
3,327 Views
27 Pages

Analysis of Changes in Rainfall Concentration over East Africa

  • Hassen Babaousmail,
  • Brian Odhiambo Ayugi,
  • Charles Onyutha,
  • Laban Lameck Kebacho,
  • Moses Ojara and
  • Victor Ongoma

13 November 2023

Understanding the spatial and temporal distribution of precipitation is important in agriculture, water management resources, and flood disaster management. The present study analyzed the changes in rainfall concentration over East Africa (EA). Three...

  • Article
  • Open Access
44 Citations
6,453 Views
14 Pages

Land Use Regression Modelling of Outdoor NO2 and PM2.5 Concentrations in Three Low Income Areas in the Western Cape Province, South Africa

  • Apolline Saucy,
  • Martin Röösli,
  • Nino Künzli,
  • Ming-Yi Tsai,
  • Chloé Sieber,
  • Toyib Olaniyan,
  • Roslynn Baatjies,
  • Mohamed Jeebhay,
  • Mark Davey and
  • Benjamin Flückiger
  • + 4 authors

Air pollution can cause many adverse health outcomes, including cardiovascular and respiratory disorders. Land use regression (LUR) models are frequently used to describe small-scale spatial variation in air pollution levels based on measurements and...

  • Article
  • Open Access
16 Citations
4,428 Views
16 Pages

26 April 2019

Soil moisture (SM) is an important variable for the terrestrial surface system, as its changes greatly affect the global water and energy cycle. The description and understanding of spatiotemporal changes in global soil moisture require long time-ser...

  • Article
  • Open Access
18 Citations
6,693 Views
20 Pages

Evaluation of Long-Term Trends of Rainfall in Perak, Malaysia

  • Muhammad Faisal Hanif,
  • Muhammad Raza Ul Mustafa,
  • Muhammad Usman Liaqat,
  • Ahmad Mustafa Hashim and
  • Khamaruzaman Wan Yusof

18 March 2022

This study aimed to examine the spatiotemporal seasonal and annual trends of rainfall indices in Perak, Malaysia, during the last 35 years, as any seasonal or spatial variability in rainfall may influence the regional hydrological cycle and water res...

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