Article
Water Resources
K. E. Hale, A. N. Wlostowski, A. M. Badger, K. N. Musselman, B. Livneh, N. P. Molotch
Summary: The study focuses on the changes in streamflow due to changes in precipitation phase and snowmelt timing in Gordon Gulch. The research indicates that annual streamflow is expected to decrease by 22% in the future, and the partitioning of water between evapotranspiration and streamflow will be altered. Winter-period partitioning of water to streamflow is projected to increase, while partitioning to evapotranspiration decreases, effectively buffering a larger decline in net streamflow associated with warming. This seasonal streamflow buffering effect is unique to snow-influenced systems, and may diminish as warming drives these systems towards rain-dominance.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Environmental Sciences
Long Yang, Yixin Yang, James Smith
Summary: The upper tail of flood peak distributions in China is characterized by large upper tail ratio floods clustered in mountainous regions with high annual rainfall, and associated with a mixture of rainfall generation processes. The research highlights the importance of interactions between complex terrain and large-scale environment in defining extreme flood peaks.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Huimin Wang, Songbai Song, Gengxi Zhang, Olusola O. Ayantobo, Tianli Guo
Summary: This study assesses the applicability of SV models to streamflow modeling in the Yellow River basin, and finds that SV models can better describe streamflow series with time-varying variance and accurately capture the occurrence of peak streamflow.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Civil
Georgia Papacharalampous, Hristos Tyralis, Yannis Markonis, Martin Hanel
Summary: In this study, a new methodological framework is proposed for exploring and comparing multi-scale analyses in a hydroclimatic context, in order to comprehensively understand the behaviors of geophysical processes and evaluate time series simulation models. By computing the feature values at different temporal resolutions and three hydroclimatic time series types, similarities and differences in the evolution patterns are identified. The computed features are also used for meaningful clustering of hydroclimatic time series, which allows for interpretation of hydroclimatic similarity at various temporal resolutions.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Khaja Haroon Seddiqe, Rahmatullah Sediqi, Osman Yildiz, Gaye Akturk, Jakub Kostecki, Marta Gortych
Summary: This study examines the impact of climate change on streamflow in the Ayazma river basin in Turkey. Hydrological modeling was used with outputs from regional climate models and emission scenarios to simulate streamflow. The results showed an increase in precipitation and temperature, with a significant impact on drought intensities and durations. Streamflow simulations indicated a decreasing trend due to increased evapotranspiration, and the choice of climate models affected the accuracy of the simulations. These findings are important for understanding and adapting to the effects of climate change on streamflow in the Ayazma river basin.
Article
Engineering, Environmental
Mustafa Sahin Dogan
Summary: This paper presents open-source data-driven machine learning models for streamflow prediction. Two models, single station (SS) and multiple stations (MS), are developed and tested for estimating missing historical and predicting future streamflows. The SS model has better performance for historical streamflows, while the MS model provides better predictions for future periods.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Shaun Harrigan, Ervin Zsoter, Hannah Cloke, Peter Salamon, Christel Prudhomme
Summary: Operational global-scale hydrological forecasting systems are valuable tools for managing hydrological extremes. This paper introduces the Global Flood Awareness System (GloFAS) service evolution, providing freely available real-time forecast data and reforecasts through the Copernicus Climate Change Service. Evaluations show that GloFAS exhibits skillful performance in a large portion of catchments in the short and medium range, but lacks skill in certain regions and longer lead times. A new headline skill score is introduced to aid user interpretation and understanding of forecast quality.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2023)
Article
Environmental Sciences
D. Partington, M. Shanafield, C. Turnadge
Summary: The study tested six time-frequency analysis methods for the determination of flow state in non-perennial stream catchments. Results showed high accuracy in synthetic data sets, but lower accuracy in field data sets. Challenges exist in noisy signals, but the methods have a good ability to determine the percentage of time for which a stream flows and does not flow, providing directions for further research.
WATER RESOURCES RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Xu Zhang, Jinbao Li, Zifeng Wang, Qianjin Dong
Summary: This study analyzed the major hydroclimatic drivers of terrestrial water storage changes (TWSC) in different climates using the GRACE dataset. The relative contributions of precipitation, evapotranspiration, runoff, and temperature to TWSC were quantified. The findings have important implications for improving water resources management and hydrological model development.
Article
Geosciences, Multidisciplinary
Kun Zhang, Wasif Bin Mamoon, E. Schwartz, Anthony. J. J. Parolari
Summary: Monitoring water quality at high frequency is difficult and expensive. Compressed sensing (CS) can be used to reconstruct high-frequency water quality data using limited measurements, as water quality signals are often sparse in the frequency domain. In this study, the sparsity of stream flow and concentration time-series was investigated, and CS was tested for reconstruction. CS effectively reconstructed the signals with only 5%-10% of the measurements needed. The study also found that CS can be integrated with dimensionality reduction and optimization techniques for more efficient sampling schemes in environmental geosciences and engineering.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Dilibaier Aibaidula, Nuray Ates, Filiz Dadaser-Celik
Summary: This study assessed the impact of climate change on water availability in the Altinapa Reservoir Watershed in Turkey. It found that air temperatures are expected to increase and precipitation and streamflow may decrease, leading to decreased reservoir storage and water availability in the future. Flexible water management and reduction in water consumption and losses are necessary to adapt to these changes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
Ecmel Erlat, Murat Turkes, Fulya Aydin-Kandemir
Summary: The study investigated spatiotemporal changes in heatwave-related climatic characteristics in Turkey since 1950, revealing a significant increase in the frequency, duration, and intensity of heatwaves, particularly after the mid-1990s. Statistically significant abrupt changes towards increased heatwave conditions were observed in Turkey after the year 1984.
THEORETICAL AND APPLIED CLIMATOLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Long Yang, Jie Ma, Xianyan Wang, Fuqiang Tian
Summary: This study examines extreme rainfall and flooding over the eastern Tibetan Plateau (TP) and establishes the link between large-scale synoptic environment, mesoscale process, and regional flood hydrology. The results show that the transitional pattern form Asian summer monsoons to midlatitude systems is the most frequent synoptic condition for flooding, and the interplay between complex terrains and moisture transport determines the contrasting flood characteristics. The study also highlights the interaction of complex terrains and nocturnal low level jets as the key mesoscale ingredients in dictating a pronounced diurnal cycle of extreme rainfall.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
Zhiying Li, Steven M. Quiring
Summary: This study predicts future streamflow changes in 889 watersheds in the contiguous United States based on projected climate and land use changes. The results show that the random forest model can explain over 85% of the variance in most watersheds. The study also found that relative cumulative moisture surplus, forest coverage, crop land, and urban land are the most important variables affecting the time-varying omega.
WATER RESOURCES RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Eyup Sisman
Summary: This study evaluated the trends of sea surface temperature (SST) data at 22 coastal stations in Turkey using MK and ITA methods, with a focus on the Mediterranean coast where 4 out of 22 stations showed significant upward trends at a 5% significance level. At a 10% significance level, the number of stations with increasing trends rose to 14.
THEORETICAL AND APPLIED CLIMATOLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Deniz Bozkurt, David H. Bromwich, Jorge Carrasco, Roberto Rondanelli
Summary: This study predicts temperature and precipitation changes in the Antarctic Peninsula in the near future under a high emission scenario. While temperatures are projected to increase across the entire peninsula, with more substantial increases in autumn and winter, precipitation is expected to increase overall but show some notable differences in certain regions like the Larsen Ice Shelf. The study highlights the challenges in obtaining consistent projections from global climate models and the added value of regional climate models in capturing finer local details and processes.
Review
Ecology
Jorge F. Carrasco, Deniz Bozkurt, Raul R. Cordero
Summary: Analysis of temperature data in the Antarctic Peninsula suggests that the warming trend in the region may be coming to an end in the 21st century, possibly transitioning into a cooling period. Significant temperature changes have been observed in the past few decades, with noticeable breakpoints in the late 1990s and potentially in the mid-2010s, coinciding with changes in large-scale climate modes such as the Antarctic Annular Mode (AAO).
Article
Meteorology & Atmospheric Sciences
D. Bozkurt, O. L. Sen, Y. Ezber, B. Guan, M. Viale, F. Caglar
Summary: The study shows that atmospheric rivers traveling from North Africa can interact with the highlands of the Near East, affecting the region's hydrometeorology and water resources. The major source regions of these ARs are found to be the Red Sea and northeast Africa, leading to enhanced precipitation and warmer conditions in the crescent-shaped orographic regions of the NE during the snowmelt season.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Meteorology & Atmospheric Sciences
Alan Demortier, Deniz Bozkurt, Martin Jacques-Coper
Summary: This study investigates the main drivers of heat wave events in central Chile using state-of-the-art reanalysis data and observations, revealing that temperature extremes and frequency of heat waves are better captured at inland stations compared to coastal stations. The study also highlights the importance of synoptic- and large-scale features, as well as sub-synoptic processes such as coastal lows, in shaping the characteristics of heat wave events.
Article
Meteorology & Atmospheric Sciences
S. Stammerjohn, T. Scambos
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
(2021)
Article
Public, Environmental & Occupational Health
Shihomi Ara Aksoy, Anna Kiziltan, Mustafa Kiziltan, Merih Aydinalp Koksal, Fatma Ozturk, S. Elcin Tekeli, S. Yeser Aslanoglu, Ulas Im, Nilhan Duran, Alper Unal, Metin Baykara, Nazan Ozyurek, Pervin Dogan, Agca Gul Yilmaz, Canan Esin Koksal, Irde Cetinturk Gurtepe, Ahmet Burcin Yereli, Mehmet Emin Birpinar, Gulen Gullu
Summary: Government policies to renew vehicle fleet by introducing newer, cleaner vehicles and removing old, polluting vehicles have significant impacts on reducing air pollution and cost savings. Results show that adopting the most drastic policy encouraging an introduction of the newer and cleaner vehicles could lead to substantial cost savings and avoidance of tens of thousands of premature deaths over the next decade.
JOURNAL OF TRANSPORT & HEALTH
(2021)
Article
Environmental Sciences
Yusuf Alizade Govarchin Ghale, Mete Tayanc, Alper Unal
Summary: The drying of Urmia Lake in Iran has led to a significant increase in aerosol pollution in the northwestern region, with an inverse relationship between the water level of the lake and aerosol pollution.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Meteorology & Atmospheric Sciences
Rosa M. Flores, Huseyin Ozdemir, Alper Unal, Mete Tayanc
Summary: The megacity of Istanbul is facing significant air pollution issues, with approximately 15.4 million people continuously exposed to various pollutants. The main sources of pollution include road traffic and shipping emissions, as well as contributions from biogenic emissions and long-range transport. The fine fraction of particles collected in this study showed high concentrations of PAHs and n-alkanes, with implications for human health due to their carcinogenic and mutagenic properties. The results indicate the urgent need for mitigation measures to control road traffic and reduce emissions from ships passing through the Istanbul Bosphorus.
ATMOSPHERIC RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Diana Francis, Ricardo Fonseca, Narendra Nelli, Deniz Bozkurt, Ghislain Picard, Bin Guan
Summary: This study investigates the occurrence of atmospheric rivers from northwest Africa towards Europe in the winter season and evaluates their impact on snow melt in the Alps. The study finds that these events lead to significant changes in snow depth and surface albedo.
ATMOSPHERIC RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Julio C. Marin, Deniz Bozkurt, Bradford S. Barrett
Summary: This study analyzed the seasonal evolution and trends of atmospheric blocking from 1979 to 2018 and found that the occurrence of blocking days varied across different regions and seasons, and was associated with the Antarctic Oscillation.
JOURNAL OF CLIMATE
(2022)
Article
Environmental Sciences
Bahtiyar Efe, Yasar Burak Oztaner, Ali Deniz, Alper Unal
Summary: This study investigates the variability of air pollutants in mega city Istanbul from 2010 to 2013. The analysis shows that PM10, SO2, and CO levels are highest in Kagithane AQS, while NOX levels are highest in Besiktas and Aksaray AQS. The measurements of PM10, SO2, NOX, and CO also exhibit seasonal variations.
AIR QUALITY ATMOSPHERE AND HEALTH
(2022)
Article
Multidisciplinary Sciences
Kyle R. Clem, Deniz Bozkurt, Daemon Kennett, John C. King, John Turner
Summary: Extreme summertime surface melt and record-high temperature events on the eastern Antarctic Peninsula and Larsen C Ice Shelf are triggered by deep convection in the central tropical Pacific, which transports warm and moist air to the area, causing strong foehn warming and surface melt. Variability in central tropical Pacific convection is a key driver of surface mass balance and extreme high temperatures in the area.
NATURE COMMUNICATIONS
(2022)
Article
Green & Sustainable Science & Technology
Rodolfo Sapiains, Gabriela Azocar, Pilar Moraga, Catalina Valenzuela, Paulina Aldunce, Camilo Cornejo, Maisa Rojas, Antonio Pulgar, Loreto Medina, Deniz Bozkurt
Summary: Deep structural transformations are occurring in Chile to strengthen climate action and community participation. However, despite high climate change concern, a traditional top-down understanding of community participation prevails. Strategies aimed at more profound cognitive and relational changes from a bottom-up perspective are necessary to avoid negative transformation trajectories.
Article
Environmental Sciences
Diana Francis, Ricardo Fonseca, Narendra Nelli, Deniz Bozkurt, Juan Cuesta, Emmanuel Bosc
Summary: Large dust storms in the Middle East in May 2022 had severe environmental, social, and health impacts. Through analyzing satellite, in-situ, and reanalysis datasets, this study identified the factors driving these storms and evaluated their effects. It was found that dust emission was promoted by density currents from deep convection over Turkey, triggered by cut-off lows from mid-latitudes fed by moisture from African atmospheric rivers. The dust clouds were transported southward at 4 km in altitude but sank to ground levels when reaching the southern Arabian Peninsula due to strong subsidence. The dust episodes caused a significant drop in shortwave flux and an increase in longwave flux, resulting in a 9 degrees C increase in nighttime temperatures.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Geography, Physical
Tomas Carrasco-Escaff, Maisa Rojas, Rene Dario Garreaud, Deniz Bozkurt, Marius Schaefer
Summary: The aim of this study is to understand the present-day climatic control of the surface mass balance (SMB) of the Patagonian Icefields at interannual timescales, especially considering large-scale processes. We modeled the present-day glacioclimatic surface conditions for the southern Andes Cordillera and found that years of relatively high SMB are associated with the establishment of an anomalous low-pressure center near the Drake Passage, while years of relatively low SMB are associated with the opposite conditions. This study also highlights the Drake Passage as a key region that has the potential to influence the SMB variability of the Patagonian Icefields.
