Review
Environmental Sciences
Elaine Wheaton, Barrie Bonsal, David Sauchyn
Summary: The Canadian Prairies are prone to compound droughts and pluvials (CDP), which pose significant risks to the economy, environment, and society. This paper synthesizes recent literature on the risks of CDP and provides examples of past occurrences, highlighting the need for improved methods to characterize and quantify CDP. The study reveals the close relationship between droughts and pluvials, and the increasing concern and interest in CDP globally. This research contributes to reducing vulnerability and damages associated with CDP and is relevant to other regions facing increasing risks of compound extremes.
Article
Geosciences, Multidisciplinary
Hung T. T. Nguyen, Stefano Galelli, Chenxi Xu, Brendan M. Buckley
Summary: Researchers used tree ring data and stable oxygen isotopes from Southeast Asia to reconstruct the monthly streamflow variations of the four major tributaries of the Chao Phraya River in Thailand. They found coherence and heterogeneity in the histories of past hydrological droughts and pluvials and revealed the spatiotemporal variability in wet season timing. These monthly-resolved reconstructions not only broaden our understanding of past hydroclimatic variability but also provide valuable data for water management and climate-risk analyses.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Editorial Material
Multidisciplinary Sciences
Deborah Zani, Thomas W. Crowther, Lidong Mo, Susanne S. Renner, Constantin M. Zohner
Summary: The study indicates that increased seasonal productivity leads to earlier autumn senescence of temperate trees, which is in agreement with observations from free-air CO2 enrichment experiments.
Article
Ecology
Bo Meng, Junqin Li, Gregory E. Maurer, Shangzhi Zhong, Yuan Yao, Xuechen Yang, Scott L. Collins, Wei Sun
Summary: The study investigated the effects of nitrogen addition on grassland production and carbon exchange under different drought treatments. Drought significantly decreased aboveground biomass and ecosystem net carbon exchange, with nitrogen addition exacerbating the response of productivity to drought, particularly through changes in root to shoot ratio. The findings suggest that chronic nitrogen enrichment may worsen the impact of growing-season drought on grassland productivity, but these effects do not persist into the next growing season.
Article
Meteorology & Atmospheric Sciences
Yuepeng Hu, Botao Zhou, Tingting Han, Huixin Li, Huijun Wang
Summary: Using the S-EOF analysis, this study finds an in-phase change of drought from spring to summer in Northeast China, associated with geopotential height anomalies around Lake Baikal. The study also shows that the spring NAO plays a significant role in the in-phase change of spring-summer droughts over Northeast China, through the combined effects of zonal wave train and central Siberian soil moisture. These findings contribute to a better understanding of drought in Northeast China and have implications for disaster prevention and mitigation.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Jhan-Carlo Espinoza, Paola A. Arias, Vincent Moron, Clementine Junquas, Hans Segura, Juan Pablo Sierra-Perez, Sly Wongchuig, Thomas Condom
Summary: Through analyzing the atmospheric variations over tropical South America, nine atmospheric circulation patterns are identified, showing significant long-term changes and impacts on the regional climate. The patterns help explain the stages of low-level circulation throughout the year and their effects on the South American monsoon onset and dry conditions.
JOURNAL OF CLIMATE
(2021)
Article
Agricultural Engineering
Dandan Huang, Huiqing Guo
Summary: This study evaluated the performance of AERMOD in predicting livestock odour dispersion in the Canadian climate and flat terrain. Measurements of odour plumes were taken under different atmospheric stability classes, and the relationship between odour concentration and intensity was used to convert the measurements for model input. The study found that scaling factors significantly influenced the model performance.
BIOSYSTEMS ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
I Noguera, S. M. Vicente-Serrano, F. Dominguez-Castro
Summary: In a study of Spain over the past six decades, the role of atmospheric evaporative demand (AED) in the development of flash droughts was found to be significant, especially in water-limited regions and during the warm season. In recent years, the contribution of AED has notably increased, particularly in summer, indicating a relationship between global warming processes and the occurrence of flash droughts in Spain.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Samantha A. Kerr, Yuliya Andreichuk, David Sauchyn
Summary: This research reconstructed the Standardized Precipitation Evapotranspiration Index in warm and cool seasons from 1400 to 2018 in the Canadian Prairies using tree-ring chronologies, visually represented through the newly developed Canadian Prairies Paleo Drought Atlas. The study also examined possible connections between hydroclimatic variables and large-scale ocean-atmosphere oscillations using wavelet analysis.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Engineering, Aerospace
Pouya Aghelpour, Hadigheh Bahrami-Pichaghchi, Vahid Varshavian, Reza Norooz-Valashedi
Summary: This study predicts droughts in Iran by using intelligent neural network models and stochastic models. The results show that the predictions based on oceanic signals such as Eastern Pacific sea surface temperature, Tropical Eastern Pacific sea surface temperature, and Oceanic Ninio Index are accurate, while the predictions for North Atlantic Oscillation and Arctic Oscillation are less reliable. The ARIMA model performs slightly better than the SVM and MLP models in this prediction.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
Masilin Gudoshava, Caroline Wainwright, Linda Hirons, Hussen S. Endris, Zewdu T. Segele, Steve Woolnough, Zachary Atheru, Guleid Artan
Summary: The timing of the rainy season is crucial for various sectors in Eastern Africa. Early onset is associated with increased rainfall and warmer sea surface temperatures, while late onset is associated with rainfall deficit and cooler sea surface temperatures. The variability in onset date is influenced by Indian Ocean sea surface temperatures and circulation.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
Article
Environmental Sciences
Nina Brooks, Kathryn Grace, Devon Kristiansen, Shraddhanand Shukla, Molly E. Brown
Summary: This study examines the relationship between variation in local seasonal agricultural quality and childbearing goals and family planning use. The results show that in some cases, women adjust their fertility aspirations or family planning use when the agricultural growing season conditions improve. This study highlights the importance of operationalizing agriculture in nuanced ways that align with women's lives to better understand how women are impacted by and respond to seasonal climate conditions.
GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS
(2023)
Article
Meteorology & Atmospheric Sciences
Jan Rehor, Rudolf Brazdil, Miroslav Trnka, Jan Balek
Summary: Flash droughts, characterized by rapid onset and intensification, are emerging as a dangerous climatic phenomenon in Central Europe. This study analyzed soil moisture data from 1961 to 2021 and found that flash droughts are increasing in frequency, particularly in the spring season. The study also identified meteorological variables and atmospheric circulation types as major drivers of flash droughts, with anticyclonic conditions and increased temperatures playing a significant role.
Article
Meteorology & Atmospheric Sciences
Ho-Nam Cheung, Nour-Eddine Omrani, Fumiaki Ogawa, Noel Keenlyside, Hisashi Nakamura, Wen Zhou
Summary: Atmospheric blocking is important for extreme weather events, but current climate models underestimate its frequency, particularly around the North Atlantic. This study shows that the mid-latitude Pacific oceanic front plays a crucial role in climatological Atlantic blocking activity. The front strengthens the Pacific jet, which extends towards the North Atlantic, reinforcing the Atlantic circulation response and increasing Euro-Atlantic blocking.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Article
Environmental Sciences
Waqar Ul Hassan, Munir Ahmad Nayak
Summary: The study shows that long-duration droughts are often associated with persistent local or remote forcings, with some oceanic forcings having global impacts. The research reveals significant temporal concordance of persistent droughts in multiple regions, indicating the presence of teleconnections between distant areas.
ENVIRONMENTAL RESEARCH LETTERS
(2021)