Sensitivity changes of US maize yields to extreme heat through timely precipitation patterns DOI Creative Commons
Haidong Zhao, Lina Zhang, Nenghan Wan

et al.

Environmental Research Communications, Journal Year: 2024, Volume and Issue: 6(7), P. 071009 - 071009

Published: July 1, 2024

Abstract Warm temperatures due to increases of greenhouse gas emissions have changed temperature distribution patterns especially for their extremes, which negatively affect crop yields. However, the assessment these negative impacts remains unclear when surface precipitation are shifted. Using a statistical model along with 23,944 county-year maize-yield data during 1981–2020 in US Corn Belt, we found that occurrence timely reduced sensitivity maize yields extreme heat by an average 20% growing season variations across phenological periods. Spatially corn belt, northern region exhibited more significant benefits from compared southern region, despite pronounced effects on cooler regions. This study underscores necessity incorporating as pivotal factor estimating under evolving climates, offering valuable insights into complex climate-related challenges.

Language: Английский

Investigating the Characteristics and Drivers of Slow Droughts and Flash Droughts: A Multi‐Temporal Scale Drought Identification Framework DOI Creative Commons
Zixuan Qi, Yuchen Ye, Yanpeng Cai

et al.

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(2)

Published: Feb. 1, 2025

Abstract Global climate change has altered the characteristics of conventional drought events, with an increasing number Slow droughts (SD) rapidly transitioning into Flash (FD). This study introduces a novel multi‐temporal scale identification framework (MTSDIF) that classifies historical agricultural events three types: SD, FD, and Slow‐to‐Flash Drought (SFD). Based on MTSDIF, GLDAS‐Noah root zone soil moisture dataset was used to analyze spatiotemporal characteristics, evolution, driving factors in China. Our confirms effectiveness proposed MTSDIF classifying different onset speeds (SD, SFD). The results indicate that, from 1980 2020, types China exhibited short‐term, medium‐term, long‐term periodic oscillations. Before 2000, SD were predominant type China, but post‐2000, areas affected by FD SFD have been continuously expanding. Compared key meteorological elements influencing show anomalies exceeding 0.5 times standard deviation. In southeastern regions human‐impacted soils, leached incept soils exhibit higher response frequency FD. Sea surface temperature indices, including interannual El Niño‐Southern Oscillation Pacific interdecadal variations such as +PDO −AMO, significantly influence occurrence monsoon ( p < 0.01). Together, highlight necessity understanding disparities consistencies land‐atmosphere‐ocean mechanisms behind varying speeds.

Language: Английский

Citations

3
Recent development on drought propagation: A comprehensive review DOI

Zhou Zhaoqiang,

Ping Wang,

Li Linqi

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132196 - 132196

Published: Oct. 1, 2024

Language: Английский

Citations

7
Disparities and similarities in the spatiotemporal dynamics of flash and slow droughts in China DOI Creative Commons
Peng Ji, Xing Yuan

Environmental Research Letters, Journal Year: 2024, Volume and Issue: 19(8), P. 084015 - 084015

Published: July 1, 2024

Abstract Climate warming has induced significant transitions from slowly-developing droughts to rapidly-developing flash in China, causing broad impacts on ecosystems, hydrological regimes, and society. To date, most studies focused temporal evolution of droughts, while neglected the spatial expansion which is essential for understanding their origins propagations, especially mega droughts. Based long-term (1940–2022) dataset 5th generation European ReAnalysis, here we use a three-dimensional drought identification method analyze disparities similarities spatiotemporal dynamics slow at subseasonal time scale over China. Although half are characterized by small areas (<5000 km 2 ), short durations (30–45 d) propagation distances centroids (<50 km), probability large-scale (>30 000 ) with long (>100 km) twice Moreover, global local autocorrelation analyses reveal that South China (SC) North hotspots respectively, they both show increasing trends (0.11–0.12 events/decade) during 1940–2022. Without these there no obvious difference distributions frequency Despite disparities, preferential westward propagation, 60%–67% movements consistent pathways atmospheric water vapor flux anomaly. Our study urges prevention events, SC.

Language: Английский

Citations

6
Accelerated soil moisture drought onset link to high temperatures and asymmetric responses associated with hit timing DOI Creative Commons
Yi Liu, Zhimin Wang,

Xinyu Zhang

et al.

Hydrology and earth system sciences, Journal Year: 2025, Volume and Issue: 29(4), P. 1103 - 1115

Published: Feb. 28, 2025

Abstract. Frequent record-high temperatures in recent years have led to a rise both the frequency and intensity of drought events while also altering formation process droughts. The worldwide occurrences flash droughts during past decade are evidence that may evolve an unusually rapid manner. Such change challenges existing monitoring early-warning systems typically designed for monthly scale purposes. This leads query regarding what extent would be accelerated at high temperatures. Based on reanalysis product, we identified historical across China 1950–2021 defined new characteristic, duration onset (DDO; as time period it takes moisture transition from normal state below-average condition) measure how rapidly develops. A two-stage experimental framework was then establish relationship between DDO antecedent soil moisture, precipitation, air temperature estimate impacts with different warming scenarios varied hitting (pre- post-drought onset) DDO. Results showed shorten by 10–50 d 35 °C (high meteorology) relative annual mean scenarios. Overall, were greatest first 4 weeks (or 1 month) stage. High pre-drought exhibited asymmetrical effects In areas normalized difference vegetation index (high-NDVI areas), presented leading role accelerating drought, low-NDVI areas, after favourable ongoing development drought. findings this study supplement understanding future environment.

Language: Английский

Citations

0
Investigating the vulnerability and resilience capacity of different land cover types to flash drought: A case study in the Mississippi River Basin DOI Creative Commons
Sophia Bakar, Hyunglok Kim, Jeffrey B. Basara

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 380, P. 125079 - 125079

Published: March 20, 2025

Flash droughts are rapidly intensifying drought events that can have severe impacts on both natural and human systems. This study assesses the vulnerability resilience of different land use cover (LULC) types to flash in Mississippi River Basin (MRB) from 2000 2022. Using Standardized Antecedent Precipitation Evapotranspiration Index (SAPEI) identify Gross Primary Productivity (GPP) data define recovery periods, 315 unique were identified, with top ten most analyzed detail. The identification was done using a spatiotemporal method combines spatial tracking contiguous areas rapid intensification criteria. found significant variability times across MRB, durations ranging 8 120 days. Regions experienced conditions, particularly during 2006, 2012, 2022 events, exhibited longest indicating prolonged ecological stress. Forested demonstrated higher resilience, shorter times, while agricultural lands, those reliant rain-fed crops, showed highlighting their moisture loss. Missouri Upper characterized by lower annual precipitation potential evapotranspiration, often due extensive activities. These findings underscore importance targeted management strategies, including implementation more robust water practices adoption drought-resistant mitigate enhance vulnerable regions MRB.

Language: Английский

Citations

0
Sensitivity changes of US maize yields to extreme heat through timely precipitation patterns DOI Creative Commons
Haidong Zhao, Lina Zhang, Nenghan Wan

et al.

Environmental Research Communications, Journal Year: 2024, Volume and Issue: 6(7), P. 071009 - 071009

Published: July 1, 2024

Abstract Warm temperatures due to increases of greenhouse gas emissions have changed temperature distribution patterns especially for their extremes, which negatively affect crop yields. However, the assessment these negative impacts remains unclear when surface precipitation are shifted. Using a statistical model along with 23,944 county-year maize-yield data during 1981–2020 in US Corn Belt, we found that occurrence timely reduced sensitivity maize yields extreme heat by an average 20% growing season variations across phenological periods. Spatially corn belt, northern region exhibited more significant benefits from compared southern region, despite pronounced effects on cooler regions. This study underscores necessity incorporating as pivotal factor estimating under evolving climates, offering valuable insights into complex climate-related challenges.

Language: Английский

Citations

0