Article
Geography, Physical
Mengxin Bai, Jingyun Zheng, Liang Zhang, Pei Xing, Maowei Wu, Zhixin Hao, Wupeng Du
Summary: This study investigates the potential causes of megapluvial events over the Yangtze-Huaihe River valley (YHRV) during the last millennium. The findings suggest that megapluvials in the YHRV are often accompanied by drought in western Asia and northwestern India, which is influenced by the negative phase of the Circumglobal Teleconnection (CGT). Additionally, high surface temperatures in western Asia and northwestern India are identified as important predictors for severe floods in the YHRV.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Meteorology & Atmospheric Sciences
Xiaoyu Zhu, Yijia Hu, Xuguang Sun, Zhong Zhong, Yao Ha, Yunying Li
Summary: The occurrence and movement of Meiyu rain belt in 2020 are influenced by atmospheric forcings from different directions, and the contributions from different directions change with time. The understanding of the mechanisms behind Meiyu can be improved through the analysis of the contributions and roles of atmospheric forcings.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Meteorology & Atmospheric Sciences
Lin Liu, Huiling Yuan, Yi Deng, Jing Ren, Yongqing Bai, Chunguang Cui
Summary: The effects of aerosols on cloud and precipitation prediction were investigated by simulating the evolution of Mei-yu frontal storms during the 2018 Mei-yu season using the Weather Research and Forecasting with Chemistry (WRF/Chem) model. Activating the chemistry-aerosol module improved the forecast skill for precipitation exceeding 5 mm/h during the Mei-yu season, while had no positive forecast skill on precipitation exceeding 0.1 mm. The inhomogeneous distribution of cloud droplet number concentration in WRF/Chem agreed better with in-situ observations, and the conversion of cloud to rain and accretion of cloud by rain in WRF/Chem contributed to improved precipitation efficiency.
ATMOSPHERIC RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
Lixia Zhang, Dan Zhao, Tianjun Zhou, Dongdong Peng, Chan Xiao
Summary: This study investigates the moisture sources and transport processes behind the record-breaking flood in the Yangtze River Valley in 2020, revealing a significant impact from moisture sources in the Indian monsoon region and the Western Pacific Ocean.
ADVANCES IN ATMOSPHERIC SCIENCES
(2021)
Article
Meteorology & Atmospheric Sciences
Yu Li, Keyi Chen, Zhipeng Xian
Summary: The all-sky assimilation of microwave observations has potentially positive impacts on improving cloud-associated weather forecasts, particularly regarding heavy rainfall. This approach provides more cloud and precipitation information, leading to more accurate forecast performances in terms of heavy rainfall distribution and intensity.
ADVANCES IN ATMOSPHERIC SCIENCES
(2021)
Article
Meteorology & Atmospheric Sciences
Shankai Tang, Shaobo Qiao, Taichen Feng, Zhengxu Fu, Zhisen Zhang, Guolin Feng
Summary: During the summer of 2020, the Yangtze and Huaihe River valley experienced excessive rainfall, breaking a record that had held since 1961. The abnormally strong western Pacific subtropical high (WPSH) played a significant role in causing this record-breaking rainfall, with its expansion westward to southern China. The extreme warming in the northern Indian Ocean (NIO) and the rapid development of La Nina enhanced the WPSH, resulting in the heavy rainfall. The National Centers for Environmental Prediction Climate Forecast System version 2 (CFSv2) accurately predicted this excessive rainfall and the abnormally strong WPSH, with the primary predictability source being the La Nina development.
ATMOSPHERIC RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Shixin Wang, Yonghui Hou, Shiyu Zhou, Hongchao Zuo, Fen Sun, Jing-Jia Luo
Summary: The study investigates the association of East Asian westerly jet (EAWJ) variations with spring rainfall anomalies in Northern China and Yangtze-Huaihe River Valley (NC-YHV) and the dynamics using reanalysis datasets. Anomalous intensification of EAWJ leads to negative rainfall anomalies in NC-YHV, with quasi-barotropic Pacific-Japan-like (PJ) teleconnection observed along coastal China. Tibet Plateau plays a role in reducing anomalous southwesterly momentum and turning westerly anomalies into northwesterly anomalies, affecting moisture transport and inducing reduced rainfall anomalies in NC-YHV.
ATMOSPHERIC RESEARCH
(2021)
Article
Environmental Sciences
Weiwei Song, Yi Li
Summary: This study investigated the ecological state of typical tidal flats along the eastern coast of China using field sampling, numerical simulation, and high-throughput sequencing. The findings revealed that the microbial communities in different subregions of the area exhibited notable differences due to variations in water quality and pollutant discharge. The study identified the impact of river pollutants on wetland microbial communities and established ecological patterns between the river and the sea, offering suggestions for watershed management and protection of coastal tidal flats.
ENVIRONMENTAL RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
Huijie Wang, Jianhua Sun, Shenming Fu, Yuanchun Zhang
Summary: Persistent heavy rainfall events over the Yangtze-Huaihe River Valley from 1981 to 2020 are classified into three types, showing different synoptic features and circulation patterns; in 2020, the composite synoptic circulation of the rainfall events generally aligns with their corresponding types, while the positions of South Asian high and Western Pacific subtropical high vary; water vapor and cold air conveyor belts are influenced by multiple factors, with the westward extension of the WPSH potentially causing the disruption of one of the conveyor belts.
ADVANCES IN ATMOSPHERIC SCIENCES
(2021)
Article
Meteorology & Atmospheric Sciences
Fengjiao Chen, Xiaoyi Zheng, Huayang Wen, Ye Yuan
Summary: Precipitation microphysics are crucial for precipitation estimation and forecasting in numerical models. This study examines the spatial characteristics of precipitation microphysics during the summer monsoon season over the Yangtze-Huaihe River valley using observations from the Global Precipitation Measurement satellite. The results show that the heaviest convective rainfall is located between the Huaihe and Yangtze Rivers, with smaller mean diameter and larger intercept parameter compared to surrounding regions. Additionally, the region exhibits high concentrations of ice hydrometeors. Stratiform precipitation has smaller mean diameter than convective precipitation for a given intensity. The vertical slope of medium reflectivity factor varies with rainfall intensity, decreasing slightly for light rain, increasing slightly for moderate rain, and increasing sharply for heavy rain for both types of precipitation. The amplitude of heavy rain for stratiform precipitation increases more significantly than for convective precipitation, possibly due to more efficient growth by warm rain processes. PCT89 values have a greater potential for informing near-surface microphysical parameters in convective precipitation compared to stratiform precipitation.
JOURNAL OF HYDROMETEOROLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Tao Gao, Liwei Zou, Fuqiang Cao, Junjie Zhan
Summary: This study investigated variations in short-duration precipitation extremes over the Yangtze River valley and the impacts of tropical cyclones. The study found that tropical cyclones have a significant influence on extreme rainfall events, with a greater impact on the upper tail of the rainfall distribution. The displacement of the western Pacific subtropical high also affects the track density of tropical cyclones and contributes to the occurrence of extreme rainfall events in the Yangtze River valley.
ATMOSPHERIC RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
Yuanchun Zhang, Jianhua Sun, Ruyi Yang, Ruoyun Ma
Summary: Based on the statistical analysis of MCSs over the second-step terrain along the Yangtze-Huaihe River Valley, this study explores the initiation and evolution of MCSs and their impact on downstream areas. The results show that the eastward-propagating MCSs significantly affect the development and enhancement of moist convection and vortices in the downstream regions.
ADVANCES IN ATMOSPHERIC SCIENCES
(2022)
Article
Meteorology & Atmospheric Sciences
Chunguang Cui, Wen Zhou, Hao Yang, Xiaokang Wang, Yi Deng, Xiaofang Wang, Guirong Xu, Jingyu Wang
Summary: In this study, the characteristics and formation mechanisms of low-level jets (LLJs) in the middle reaches of the Yangtze River during the 2010 mei-yu season were analyzed using radiosonde data and reanalysis data. The vertical structure of LLJs was dominated by boundary layer jets (BLJs) at heights of 900-1200 m. Synoptic-system-related LLJs (SLLJs) occurred most frequently at 0800 LST and were strongest at 1100 LST. Both BLJs and SLLJs were characterized by a southwesterly wind direction, with SLLJs being more westerly and northeasterly SLLJs occurring more frequently than northeasterly BLJs. BLJs developed earlier than SLLJs.
ADVANCES IN ATMOSPHERIC SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Wei Lu, Yimin Zhu, Yao Ha, Zhong Zhong, Yijia Hu
Summary: This study focuses on the interdecadal transition of summer rainfall interannual variability over the Yellow-Huaihe River valley. It is found that the interannual variability of summer rainfall over the YHRV becomes significantly weakened after the late 2000s. The interdecadal shift of the East Asian jet stream axis and the western Pacific subtropical high are two major factors leading to the interdecadal transition of summer rainfall interannual variability over the YHRV.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Chao Zhang, Xiaojing Jia, Zhiping Wen
Summary: This study found that the increased spring snow-cover extent over the western Tibetan Plateau after the 1990s has a significant impact on the mei-yu rainfall in the Yangtze River valley. The correlation between the two factors has changed over time, leading to different weather patterns and ultimately affecting the precipitation in the MRYRV.
JOURNAL OF CLIMATE
(2021)
Article
Biophysics
Hui Wang, Zexing Tao, Huanjiong Wang, Quansheng Ge
Summary: The study found that the proportion of bud-burst followed a logistic function over time at a given temperature, and a mathematical model was developed to simulate and predict bud-burst in woody plants under different temperature conditions using parameterization. The results indicated that with increasing temperature, the bud-burst rate increased monotonically while the temperature sensitivity decreased.
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
(2021)
Article
Green & Sustainable Science & Technology
Xiaxiang Li, Changxin Liu, Fang Wang, Quansheng Ge, Zhixin Hao
Summary: The study found that China's future investment has a positive impact on reducing carbon emissions in the Belt and Road region, especially in strengthening the structural effect. Under both the business-as-usual Chinese investment scenario and the strengthening Chinese investment scenario, the CO2 emissions of the B&R region will decrease.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Robabeh Yousefi, Fang Wang, Quansheng Ge, Jos Lelieveld, Abdallah Shaheen
Summary: This study assessed the aerosol climatology over Iran using MERRA-2 and MODIS data, revealing positive and negative AOD trends during 2000-2010 and 2010-2018 linked to aeolian dust changes. Soil moisture was identified as a key factor influencing dust mobilization, especially in southwestern Iran, affected by adjacent mineral dust sources.
Article
Environmental Sciences
Zexing Tao, Yunjia Xu, Quansheng Ge, Junhu Dai, Huanjiong Wang
Summary: Through experiments and simulations, it has been found that frost hardiness of plants has decreased over the 36-year period due to insufficient cold hardening in autumn and rapid dehardening in spring. However, the percentage of frost damage incurred by the five species showed a declining trend due to reduced frequency and intensity of frost events. Therefore, the decreased frost severity largely offsets the negative effects of diminished frost hardiness, suggesting that the frost risk faced by temperate forests may remain constant or decline with continued climate warming.
Article
Meteorology & Atmospheric Sciences
Junhu Dai, Mengyao Zhu, Wei Mao, Ronggao Liu, Huanjiong Wang, Juha Mikael Alatalo, Zexing Tao, Quansheng Ge
Summary: This study investigated changes in vegetation phenology along elevational gradients in six mountains in northern China. The results showed that while the start of growing season (SOS) advanced for most pixels, the elevational lapse rate of SOS varied between different mountains. Southern mountains exhibited a significant decreasing trend in elevational synchronization of SOS, unlike other temperate mountains.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Wenhui Chen, Huijuan Cui, Quansheng Ge
Summary: With global warming, the frequency and intensity of extreme precipitation in China are generally increasing. The study reveals a complex trend in the dependency of extreme precipitation events on temperature in China, with negative relationships found dominant in most areas in summer.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
Article
Agronomy
Shaozhi Lin, Huanjiong Wang, Quansheng Ge, Zhi Hu
Summary: The study found that 8 out of 14 temperate woody species exhibited significantly different relationships between chilling accumulation and heat requirement in two different winter seasons. Using the chilling model from the first year to simulate spring events in the second year resulted in large uncertainties, with root-mean-square errors ranging from 1.3 to 9.9 days. Additional chilling models were found to improve the phenological simulation by reducing RMSE by 0.1-3.7 days for 10 species.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Environmental Sciences
Mrinal Singha, Jinwei Dong, Quansheng Ge, Graciela Metternicht, Sangeeta Sarmah, Geli Zhang, Russell Doughty, Sharachchandra Lele, Chandrashekhar Biradar, Sha Zhou, Xiangming Xiao
Summary: The study highlights the negative impacts of rice farming expansion on groundwater resources and air quality in the Indian 'breadbasket', with satellite observations providing important data for decision-making. The enactment of a groundwater protection policy in 2009 in India led to a decrease in groundwater depletion but also contributed to increased air pollution.
GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS
(2021)
Article
Engineering, Civil
Hefei Huang, Huijuan Cui, Quansheng Ge
Summary: The study found that in the future, about 15% to 20% of regions in China may experience significant increases in extreme precipitation, mainly in the southeast and northwest. 15% of medium and large-sized dams in China may be significantly affected, with more dams expected to be impacted by 1-day and 3-day precipitation compared to 5-day precipitation.
JOURNAL OF HYDROLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Yujie Liu, Qiaomin Chen, Jie Chen, Tao Pan, Quansheng Ge
Summary: Climate change significantly affects wheat yield by influencing wheat phenology, with potential reductions expected in both spring and winter wheat yields under different future climate scenarios. The study highlights the importance of developing heat-tolerant varieties with high calorie requirements as an adaptive strategy to mitigate the negative impact of climate change on wheat yield in the study areas.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2021)
Article
Environmental Sciences
Li-Li Sun, Hui-Juan Cui, Quan-Sheng Ge
Summary: This study predicts the emission trajectories at the provincial level in China and finds that most provinces can achieve peak emissions before 2030, but achieving carbon neutrality before 2060 is challenging. The provincial neutrality time is concentrated between 2058 and 2070.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2022)
Article
Agronomy
Chao Zhang, Jinwei Dong, Lijun Zuo, Quansheng Ge
Summary: This study proposed a two-step strategy to map annual irrigated areas in China from 2000 to 2019. The results showed that the total irrigated area in China increased by 24.8%, mainly in the northern region, due to land reclamation and improved irrigation infrastructure.
AGRICULTURAL WATER MANAGEMENT
(2022)
Article
Agriculture, Multidisciplinary
Chao Zhang, Jinwei Dong, Quansheng Ge
Summary: With the development of remote sensing technology, fine-resolution cropland datasets have become powerful tools for agriculture planning and food security evaluation. This study compared and evaluated six crop-land products in China in 2015, finding differences in spatial consistency, provincial area accuracy, and pixel-wise accuracy.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2022)
Article
Environmental Sciences
Yujie Liu, Jie Zhang, Tao Pan, Qiaomin Chen, Ya Qin, Quansheng Ge
Summary: This study conducted a probabilistic assessment to analyze the production of major crops in the near future under climate change. The results showed that without adaptation measures, there will be significant yield loss in major crop-producing areas, with wheat being more affected than maize in terms of yield reduction and water use efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Aqeel Ahmad, Yujie Liu, Quansheng Ge
Summary: The changing environment poses a threat to food security and the nutritional quality of crops. Through studying the nutritional profile and yield of maize crops, this research reveals the response of maize plant enzyme activities to different environments and the impact of climate change on maize nutritional quality.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)