Article
Environmental Sciences
Huijiao Chen, Shuo Wang, Jinxin Zhu, Dagang Wang
Summary: Simultaneous occurrence of drought and flood events in Eastern China amplifies threats and is projected to become more frequent and intense under climate warming. Historical pattern shows more floods in Southeast China and more droughts in Northeast China, but climate warming will shift this pattern. Weakening of western Pacific subtropical high and northward displacement of monsoon rain belt may contribute to the changes in drought and flood patterns.
Article
Agronomy
Ben R. Lockwood, Justin T. Maxwell, Sander O. Denham, Scott M. Robeson, David C. LeBlanc, Neil Pederson, Kimberly A. Novick, Tsun Fung Au
Summary: Quercus is undergoing a decrease in abundance and dominance in North American forests. Eastern white oak has experienced a greater decline in dominance compared to northern red oak. Understanding the growth-climate relationships of these species is important for comprehending the changes in Quercus demographics under shifting climatic regimes.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Boen Zhang, Shuo Wang, Jakob Zscheischler, Hamid Moradkhani
Summary: The sudden shift from drought to downpour has gained attention in recent years, particularly in low-income regions. From 1980 to 2010, the frequency of drought-to-downpour events increased by 24%-48% in the poorest 20% of the global population. Although these events do not appear to be occurring more often globally, they are more frequent in regions with higher poverty rates, especially in African countries. Future climate projections suggest that this inequality in exposure will persist. Therefore, greater support for climate adaptation is necessary in low-income countries to reduce poverty and inequality.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Huijiao Chen, Shuo Wang
Summary: The consecutive occurrence of meteorological dry and wet extremes has been receiving increasing attention. This study investigates the dynamic evolution of dry-to-wet transitions in response to climate warming. It finds that approximately three-fifths of global land area are projected to experience an accelerated dry-to-wet transition, with Southern Asia facing the most severe transitions.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Krzysztof Raczynski, Jamie Dyer
Summary: This study quantifies the variability of low flow river conditions in the Southeastern United States using National Water Model (NWM) simulations. The results show diverse spatial and temporal patterns of low flow occurrence, with some locations exhibiting strong seasonal dependence. The study also finds a correlation between low flow occurrence and precipitation patterns.
Article
Agronomy
Hai Nguyen, Allen Thompson, Christine Costello
Summary: The trend of drought-induced yield losses in U.S. agriculture has been increasing despite financial investments and technological development. Evaluating drought impacts on crop production is crucial as climate change worsens drought conditions. This study assessed the effectiveness of modified Standardized Precipitation Indices (SPIs) and Standardized Precipitation Evapotranspiration Index (SPEI) in evaluating drought impacts on maize and soybean yields in the southeastern U.S. Results showed that the modified SPI can be as effective as SPEI in assessing drought impacts. Drought events during critical growth stages significantly affected yield variability, and irrigation reduced the sensitivity to drought.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Plant Sciences
Enliang Liu, Linli Xu, Zhengqian Luo, Zhiqiang Li, Guohui Zhou, Haifeng Gao, Furong Fang, Jun Tang, Yue Zhao, Zhilin Zhou, Ping Jin
Summary: Drought has negative impacts on plant growth, development, agriculture, and food production. This study investigated the mechanisms of drought tolerance in seven sweet potato cultivars. Different drought-tolerance mechanisms were identified, providing important information for the selection of sweet potatoes.
FRONTIERS IN PLANT SCIENCE
(2023)
Review
Horticulture
Ricardo A. Lesmes-Vesga, Liliana M. Cano, Mark A. Ritenour, Ali Sarkhosh, Jose X. Chaparro, Lorenzo Rossi
Summary: The Southeastern United States is exploring alternative crops due to agriculture crises, such as the ongoing epidemic of citrus greening disease. Peach production is a promising alternative, but it faces limitations and challenges in the region, including differing climates and edaphic challenges. Utilizing the genetic diversity of the Prunus genus is crucial for the success of peach as an alternative crop, and developing new rootstock cultivars is the most efficient way to overcome these challenges.
Article
Geosciences, Multidisciplinary
M. Osman, B. F. Zaitchik, N. S. Winstead
Summary: In June 2021, the Southwest United States experienced a record-breaking heatwave and severe drought. The study found that drought conditions may have exacerbated the impact of the heatwave, especially in wetter, forested areas.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Rosana Nieto Ferreira, Thomas M. Rickenbach
Summary: This study uses radar data and reanalysis datasets to examine the factors leading to the sudden onset of springtime precipitation associated with isolated storms in the Southeast United States. It is found that the onset of the isolated storm season in this region is influenced by both slow thermodynamic processes and fast dynamic triggers. A build-up of convective available potential energy in the Gulf of Mexico, shifts in the upper-tropospheric jet stream, and the establishment of the North Atlantic subtropical high western ridge are key factors in initiating the warm-season regime of isolated storm precipitation in the Southeast US.
Article
Chemistry, Physical
Minghao Zhang, Mehdi Chouchane, S. Ali Shojaee, Bartlomiej Winiarski, Zhao Liu, Letian Li, Rengarajan Pelapur, Abbos Shodiev, Weiliang Yao, Jean-Marie Doux, Shen Wang, Yixuan Li, Chaoyue Liu, Herman Lemmens, Alejandro A. Franco, Ying Shirley Meng
Summary: Using a thick NMC811 electrode as an example, this study employs a macro-to-nanoscale 2D and 3D imaging analysis approach combined with 4D computational modeling to investigate its degradation mechanism in a lithium-ion battery cell. The results reveal that the reaction heterogeneity caused by unbalanced electron conduction within the thick cathode is the main cause of battery degradation over cycling. The increased heterogeneity leads to uneven utilization of active material and higher probabilities of particle cracking.
Article
Geography, Physical
Aubrey L. Hillman, Sumar B. Hart, Vann Smith, Sophie Warny
Summary: This study summarizes three lake sediment records from the southeastern United States (SE US) to test the importance of the Pacific North American (PNA) pattern and the North Atlantic Oscillation (NAO) over the last 5000 years. The results indicate relatively stable hydroclimate conditions before historical European settlement, but significant and rapid changes occurred in vegetation and lake hydrologic balance after settlement.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Engineering, Civil
Miao Tang, Linguo Yuan, Zhongshan Jiang, Xinghai Yang, Changhai Li, Wanchun Liu
Summary: In order to accurately characterize short-term and long-term droughts and understand drought propagation mechanisms, it is necessary to determine the multiscale features of drought extremes. This study estimates terrestrial water storage changes (TWSC) using Global Navigation Satellite System (GNSS) data and develops a Multiscale GNSS-based Drought Index (MGDI) to characterize hydrological droughts in Brazil. The MGDI is similar to other multiscale drought indices and has a longer response time to meteorological variables. The spatial distribution of MGDI-derived drought frequency reveals that hydrological droughts are most frequent in northeastern Brazil and near the Parana River Basin.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Stephanie DeFlorio-Barker, Andrey Egorov, Genee S. Smith, Mark S. Murphy, Jason E. Stout, Andrew J. Ghio, Edward E. Hudgens, Kyle P. Messier, Jean-Marie Maillard, Elizabeth D. Hilborn
Summary: The study found that proximity to certain soil types (hydric and acidic) may be a risk factor for the increasing prevalence of pulmonary nontuberculous mycobacteria (NTM) disease in central North Carolina.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Daniel J. McEvoy, Benjamin J. Hatchett
Summary: In April 2021, an alarming rate of snow melt occurred throughout the western US, leading to degraded hydrologic conditions and declining summer water supply forecasts. This study aims to quantify the magnitude and climatological context of snow water equivalent (SWE) melt rates and understand the hydrometeorological drivers during April 2021. The findings show widespread snow drought conditions and record 7-day snow melt rates, influenced by upper atmospheric ridging and heat waves.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Chang-Kyun Park, Jonghun Kam
Summary: Reliable sub-seasonal precipitation forecast is crucial for managing multi-year droughts in a timely manner. This study assessed the prediction skill of five Sub-seasonal Experiment (SubX) models for precipitation during recent multi-year South Korea droughts using various verification metrics. The results indicate that the prediction skill of the SubX models varied depending on the stage, event, and model during the droughts. The EMC-GEFSv12 model with 11 ensemble members showed the highest forecasting skill.
ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES
(2023)
Article
Engineering, Civil
Shahid Ali, Byeong-Hee Kim, Taimoor Akhtar, Jonghun Kam
Summary: Pakistan is facing seasonal changes in streamflow, leading to a scarcity of water resources for agriculture. This study evaluated the past and future changes in streamflow timing along the four major rivers of Pakistan using observational data and bias-corrected hydrological projections.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Mohammed Basheer, Victor Nechifor, Alvaro Calzadilla, Solomon Gebrechorkos, David Pritchard, Nathan Forsythe, Jose M. Gonzalez, Justin Sheffield, Hayley J. Fowler, Julien J. Harou
Summary: The uncertainties of climate change present challenges for managing the Nile River system, given the increasing demands for river-related services and political tensions among riparian countries. Cooperative adaptive management can help alleviate these stresses and tensions.
NATURE CLIMATE CHANGE
(2023)
Article
Green & Sustainable Science & Technology
Jose M. Gonzalez, James E. Tomlinson, Eduardo A. Martinez Cesena, Mohammed Basheer, Emmanuel Obuobie, Philip T. Padi, Salifu Addo, Rasheed Baisie, Mikiyas Etichia, Anthony Hurford, Andrea Bottacin-Busolin, John Matthews, James Dalton, D. Mark Smith, Justin Sheffield, Mathaios Panteli, Julien J. Harou
Summary: A multi-objective design framework assisted by artificial intelligence is used in Ghana to explore optimized management and investment strategies for balancing hydropower, bioenergy, solar and wind energies, and their impacts. The development of renewable energy systems and improved operation play a crucial role in mitigating climate change. However, relying solely on hydropower integration to counterbalance intermittent renewables can have negative effects on aquatic ecosystems and increase water conflicts across sectors, highlighting the need for diversified investment strategies.
NATURE SUSTAINABILITY
(2023)
Article
Environmental Sciences
Sungyoon Kim, Mukesh Kumar, Jonghun Kam
Summary: This study investigates the impact of irrigated agriculture expansion on precipitation in the Southeastern United States. The results show that the expansion of irrigation reduces convective triggering potential and low-level humidity index, while increasing convective available potential energy. However, the impact on precipitation is heterogeneous, with irrigated areas experiencing a reduction in precipitation while other landcovers experiencing an increase.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Water Resources
Mengru Zhang, Xiaoli Yang, Ming Pan, Linyan Zhang, Xiuqin Fang, Justin Sheffield
Summary: The characteristics of meteorological drought in different river basins in China vary spatially and temporally, and this variation is also reflected in the influence of meteorological drought in different watersheds. This study investigates the future meteorological drought risk under different emission scenarios and explores the impact of precipitation and temperature on meteorological drought in different basins in China. The study also considers the uncertainty associated with CMIP6 in different watersheds. The results show a decreasing trend in the frequency of meteorological drought events in the future, but an increase in drought intensity and duration. Precipitation plays a major role in meteorological drought, especially in the northeast and southeast basins of China.
HYDROLOGY RESEARCH
(2023)
Article
Engineering, Civil
Tomasz Janus, James Tomlinson, Daniela Anghileri, Justin Sheffield, Stefan Kollet, Julien J. Harou
Summary: This study investigates the impact of hydrologic-land feedbacks and a hydrologic-water management linkage on optimized land cover arrangements within a multiobjective land cover design framework. It integrates a spatially-distributed and physically-based hydrologic model with a network-based multi-sector water resources management model. Results show that trade-offs between water, food, energy, and environment objectives depend on land cover composition and spatial arrangement. The study demonstrates the added benefits of coupling distributed hydrologic models with water management simulation for multisector multicriteria land cover planning.
JOURNAL OF HYDROLOGY
(2023)
Article
Multidisciplinary Sciences
Xing Yuan, Yumiao Wang, Peng Ji, Peili Wu, Justin Sheffield, Jason A. Otkin
Summary: Flash droughts have become increasingly common worldwide, posing challenges to drought monitoring and prediction. The intensification of droughts has accelerated over subseasonal time scales, leading to a transition towards more flash droughts in 74% of global regions over the past 64 years. This transition is linked to amplified anomalies in evapotranspiration and precipitation deficit due to human-induced climate change. In the future, this transition is expected to expand to most land areas, with greater increases under higher-emission scenarios. These findings highlight the urgency of adapting to faster-onset droughts in a warmer future.
Article
Green & Sustainable Science & Technology
Ailish Craig, Craig Hutton, Laura A. A. Lewis, Frank B. B. Musa, Justin Sheffield
Summary: This study examines the association between typologies of social capital and household food security in Southern Malawi, with a focus on access to food. The findings show that bonding and bridging social capital are associated with better household access to food, while linking social capital is associated with lower access to food. The study also suggests that female-headed households prioritize linking social capital, while male-headed households prioritize bonding social capital.
SUSTAINABILITY SCIENCE
(2023)
Article
Engineering, Chemical
Anqi Liu, Jonghun Kam, Sae Yun Kwon, Wanyun Shao
Summary: Through sentiment analysis of over 10,000 water pollution complaints from residents in Alabama, USA (2012-2021), this study finds that the 2017 state-wise drought increased negative water pollution complaints by +35%. Since COVID-19, there has been a significant decrease in negative and subjective water pollution complaints by -30% and an increase by +20%, respectively, and these sentiment changes have persisted until 2021. This study highlights the importance of timely response to changes in public emotions and attitudes in environmental governance and management.
Article
Environmental Sciences
Chang-Kyun Park, Sangeun Lee, Hyuncheol Yoon, Jonghun Kam
Summary: This study investigates the meteorological drought caused by cumulative precipitation deficits in the southwestern Korean Peninsula since early spring 2022 and predicts the sub-seasonal and seasonal outlooks of the drought using probabilistic and climate model-based forecasts. The results show that both springtime and summertime precipitation deficits in 2022 contribute equally to the ongoing drought, with the six-month accumulated precipitation deficit being a key driver. At least 80, 150, and 210 mm of precipitation are required for recovery in March, April, and May 2023, respectively.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Engineering, Civil
Eunmi Lee, Jonghun Kam
Summary: This study aims to assess the explainability of a deep learning model for the multi-purpose dam operation and provides insights into how the model responds to different inputs. The results show that the trained model performs well in predicting water levels and exhibits different responses to changes in input data.
JOURNAL OF HYDROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Catherine Tlotlo Kerapetse, Jean-Marie Kileshye Onema, Webster Gumindoga, Cosmo Ngongondo, Justin Sheffield
Summary: The understanding of groundwater recharge occurrence in drylands is essential for water resources management. This study used Remote Sensing and GIS techniques to identify potential groundwater recharge zones and predicted crop yield. The results showed changes in land cover and suggested the existence of water resources for food security in water-scarce drylands.
PHYSICS AND CHEMISTRY OF THE EARTH
(2023)
Article
Humanities, Multidisciplinary
Jiam Song, Kwangmin Jung, Jonghun Kam
Summary: This study examines the temporal changes in online search activities for shopping products by the public during the COVID-19 pandemic, using NAVER DataLab Shopping Insight (NDLSI) data. The findings suggest that these changes are closely associated with the COVID-19 prevention policies and risk of exposure to the virus variants.
HUMANITIES & SOCIAL SCIENCES COMMUNICATIONS
(2023)
Article
Environmental Sciences
Kwang-Hun Lee, Shahid Ali, Yena Kim, Kitack Lee, Sae Yun Kwon, Jonghun Kam
Summary: This study aims to estimate the nitrate loads of a reservoir in South Korea using uncrewed surface vehicles (USV). The results show that a point measurement of water depths and nitrate concentrations can cause underestimation of nitrate loads, particularly after intense rainfall events.
WATER RESOURCES RESEARCH
(2023)
