Article
Meteorology & Atmospheric Sciences
Puxi Li, Kalli Furtado, Tianjun Zhou, Haoming Chen, Jian Li
Summary: This study compared the performance of a convection-permitting model with two mesoscale models in simulating precipitation over the Tibetan Plateau. The mesoscale models exhibited notable wet biases and a spurious early-afternoon rainfall peak, while the convection-permitting model significantly reduced the wet bias and spurious rainfall.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2021)
Article
Meteorology & Atmospheric Sciences
Fan Zhang, Qinghong Zhang, Juanzhen Sun
Summary: In the Meiyu season in China, a detailed analysis of the convective initiation (CI) mechanism of elevated convection in a complex topography region was provided for the first time. The transition of mountain-plain thermal wind near sunset was identified as the trigger for the CI process, highlighting the importance of understanding local meteorological features in convective initiation.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Meteorology & Atmospheric Sciences
Fan Zhang, Qinghong Zhang, Juanzhen Sun, Jun Xu
Summary: Convection is the main contributor to heavy rainfall in China's Yangtze-Huai River Basin during Meiyu season. This study investigates the characteristics of convection initiation (CI) associated with the Meiyu front using a large dataset of CI events. The analysis reveals that most CI events occur in the region of existing stratiform clouds and exhibit two triggering modes in mountainous areas. The occurrence of CI is influenced by the Meiyu circulation patterns and their interactions with local topography.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Meteorology & Atmospheric Sciences
Fan Zhang, Qinghong Zhang, Juanzhen Sun, Jun Xu
Summary: In this study, a large set of 86,099 convective initiation (CI) events in China's Yangtze-Huai River Basin during the Meiyu season were analyzed. The majority of CI events (approximately 90%) occurred in the region of existing stratiform clouds. CI tended to concentrate in mountainous areas and exhibited two triggering modes. The characteristics of CI occurrence varied with the patterns of Meiyu circulation and their interactions with local topography, with warm air advection dominating the CI during the Meiyu season.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Meteorology & Atmospheric Sciences
Xinyue Luo, Xiaogang Huang, Jianfang Fei, Ju Wang, Chao Li, Xiaoping Cheng
Summary: Using observations and reanalysis data, the study summarizes the circulation characteristics of elevated thunderstorms behind winter cold fronts over the eastern Yunnan-Guizhou Plateau and proposes a new triggering mechanism related to topography. The findings show that the intersection of topography and cold front creates unique geographical and circulation conditions, leading to the triggering of elevated thunderstorms.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Meteorology & Atmospheric Sciences
Qin Jiang, Francesco Cioffi, Mario Giannini, Jun Wang, Weiyue Li
Summary: The study finds a strong association between extreme precipitation events and circulation patterns in the central-eastern China region. Based on data classification and comparison, it is found that circulation patterns have become more synchronized with extreme precipitation events since 1990, resulting in an increase in the frequency of extreme precipitation.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2023)
Article
Environmental Sciences
Jun Sun, Xiuping Yao, Guowei Deng, Yi Liu
Summary: This research studied the characteristics and synoptic patterns of extreme precipitation events over the central and eastern areas of the Tibetan Plateau from 1981 to 2016, showing that the largest amount of extreme precipitation occurs in the southern and eastern regions with a quasi-biweekly oscillation in frequency. A total of 33 regional extreme precipitation events were identified, classified into plateau trough type, plateau shear line type, and plateau vortex type based on influence systems.
Article
Meteorology & Atmospheric Sciences
Qiu Yang, L. Ruby Leung, Zhe Feng, Fengfei Song, Xingchao Chen
Summary: Mesoscale convective systems (MCSs) play a significant role in summer precipitation over the central United States. A lack of understanding of MCS initiation has been identified as a key factor contributing to warm and dry bias in coarse-resolution climate models. Development of single-column and multicolumn models has helped simulate convective initiation and mesoscale cluster formation, providing insights for improving MCS simulations in global climate models.
JOURNAL OF THE ATMOSPHERIC SCIENCES
(2021)
Review
Agronomy
Jana Polakova, Josef Holec, Jaroslava Janku, Mansoor Maitah, Josef Soukup
Summary: This article focuses on the role and use of agri-environment measures in Central and Eastern Europe in providing ecosystem services. It discusses the importance of soil conservation and examines the implementation of agri-environment schemes in arable land systems. The study found that while subsidies for agri-environment measures have increased moderately over time, they are still overshadowed by generic farm-level subsidies.
Article
Meteorology & Atmospheric Sciences
Victor M. Torres, Chris D. Thorncroft
Summary: This study explores the nature of a midlevel jet in the tropical eastern Pacific that supports the development of easterly waves. The jet is established through moist convection over the ocean and frequent dry convection over the Mexican Sierra Madre region. The findings highlight the need to better understand and predict these potential vorticity sources in order to understand and predict the nature of easterly wave developments in this region.
JOURNAL OF CLIMATE
(2022)
Article
Geosciences, Multidisciplinary
Malgorzata Wendorff-Belon, Mariusz Rospondek, Leszek Marynowski
Summary: The study analyzed the geological characteristics and organic matter sources in the Vrancea and Tarca?u blocks in Eastern Romania, revealing different types of organic matter sources in different sub-basins. Stratigraphical data suggest differences in nutrient availability between the Vrancea sub-basin and the Tarca?u region, leading to variations in organic matter. Additionally, analysis of water column stratification and redox conditions showed different levels of redox conditions at different locations, possibly related to local upwelling.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Liangqing Cheng, Yougui Song, Linhai Yang, Hong Chang, Yubin Wu, Hao Long, Xiaodong Miao, Zhibao Dong
Summary: This study analyzes data from a loess section in eastern Central Asia and finds that the sorting coefficient can more sensitively reflect the intensity of the Siberian High, revealing a significant influence of the Siberian High on the East Asian Summer Monsoon.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Biren Wang, Xiaosong Yang, Shucai Li, Chao Teng, Xinjie Yang, Fuyong Huang, Jun Cao, Bing Yang, Xiaofei Zhang, Yi Zhou
Summary: A newly discovered Early Neoproterozoic volcano-sedimentary sequence in the Beishan orogenic belt suggests the presence of an accreted terrane consisting of lithologies with various origins.
GEOLOGICAL JOURNAL
(2021)
Article
Meteorology & Atmospheric Sciences
Oliver Branch, Andreas Behrendt, Osama Alnayef, Florian Spath, Thomas Schwitalla, Marouane Temimi, Michael Weston, Sufian Farrah, Omar AL YAzEEDI, Siddharth Tampi, Karel DE Waal, Volker Wulfmeyer
Summary: In this study, multi-season measurements were conducted at a remote mountain peak observatory in the United Arab Emirates (UAE) using Doppler lidar and cloud radar. The study focused on seedable convective clouds and the clear-air signatures before convection initiation. The observations, combined with local radar and satellite data, provided valuable insights into the convective processes and the potential for cloud seeding guidance.
METEOROLOGISCHE ZEITSCHRIFT
(2022)
Article
Geology
Esmat A. Abou El-Anwar, Zeinab L. Belal, Salman A. Salman, Said H. Abd El Rahim, Wael Abdelwahab
Summary: In order to increase human productivity and ensure the security of phosphorus supply, further investigation on the geochemical characteristics of moderate carbonate phosphates is needed. The study of Um Queih Mine revealed that it belongs to intermediate grade phosphate ore with high concentrations of various elements and deposition in anoxic conditions. The mineralogical analysis showed that the phosphorites are mainly composed of fluorapatite and non-phosphatic minerals.
CARBONATES AND EVAPORITES
(2023)
Article
Geosciences, Multidisciplinary
Murong Zhang, Xiao-Yi Yang, Yipeng Huang
Summary: This study investigated the impacts of sudden stratospheric warming (SSW) on three severe cold events in the Northern Hemisphere in early 2021 using subseasonal-to-seasonal ensemble forecasts. The results showed that the stratospheric polar vortex (SPV) played a significant role in the occurrence of these cold events. The sensitivity analysis revealed that the variations in the SPV at a lead time of 1-2 weeks were more closely related to the cold events over Siberia and western Canada than the one over central U.S. The forecasts also indicated that the specific characteristics of the SPV, such as elongation and displacement, influenced the occurrence of these cold events.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Yipeng Huang, Murong Zhang, Yuchun Zhao, Ben Jong-Dao Jou, Hui Zheng, Changrong Luo, Dehua Chen
Summary: The southeastern coast of China has experienced significantly increasing thunderstorm activities, but has received less attention in convective development. This study examined a high-impact convection outbreak event on 6 May 2020 and found distinct inter-zone differences in convective development. The occurrence likelihood of severe convection and associated weather can be well-captured by high-resolution observations, which may facilitate fine-scale convection nowcasting.
Article
Environmental Sciences
Hui Zheng, Yuchun Zhao, Yipeng Huang, Wei Zhang, Changrong Luo, Ming Wei, Xinfa Qiu
Summary: The study examined the merging of a fast-moving bow echo with a convective cell, resulting in gusty winds and localized precipitation. The observed mesovortex exhibited cyclonic circulation, resembling a supercell feature.
Article
Environmental Sciences
Youfan Chen, Han Han, Murong Zhang, Yuanhong Zhao, Yipeng Huang, Mi Zhou, Cong Wang, Guangyan He, Ran Huang, Bin Luo, Yongtao Hu
Summary: Sichuan Province in southwestern China is experiencing severe ozone pollution in the warm season, primarily due to high-pressure systems promoting ozone production and leading to high ozone concentrations. Different emission control measures should be implemented based on the severity of ozone pollution to improve air quality.
Article
Meteorology & Atmospheric Sciences
Lanqiang Bai, Guixing Chen, Yipeng Huang, Zhiyong Meng
Summary: This study explores the characteristics and processes of convection initiation at a coastal rainfall hotspot in South China, revealing that the occurrences are concentrated in low-lying areas near small-scale mountains. The findings also suggest the crucial role of summer monsoonal winds in triggering coastal convection, while the presence of small-scale topography disrupts low-level onshore flow and facilitates the initiation of convection events.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Meteorology & Atmospheric Sciences
Murong Zhang, Kristen L. Rasmussen, Zhiyong Meng, Yipeng Huang
Summary: This study investigates the impacts of coastal terrain on warm-sector heavy rainfall in southern China. It found that coastal terrain plays an important role in the initiation and organization of MCSs, and influences the rainfall potential. These findings have significant implications for forecasting.
MONTHLY WEATHER REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Yipeng Huang, Zhiyong Meng, Murong Zhang
Summary: This study examined the synoptic impacts on the occurrence of boundaries and associated convection in the Hetao Irrigation District in North China from 2012 to 2016. The results showed that boundary days, especially convective boundary days, were more frequent under a mid-troposphere high-pressure ridge or pre-trough pattern. These patterns were characterized by warmer near-surface environment, stronger southerly winds, larger convective available potential energy (CAPE), and low-level moisture convergence. Boundaries under favorable patterns showed more apparent arid-area dependence, more dominant orientation along the vegetation contrast, more northward movement, earlier formation and maturation, and more dispersed convection. Boundary days had higher near-surface temperatures and stronger ambient flows against the vegetation-contrast-induced circulations compared to nonboundary days. Additionally, convective boundary days had stronger updrafts, larger CAPE, and higher moisture and K index compared to nonconvective boundary days.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Yunji Zhang, Huizhen Yu, Murong Zhang, Yawen Yang, Zhiyong Meng
Summary: This study explores the controlling factors of uncertainties and error growth in forecasting extreme heavy rainfall events in Zhengzhou, China. The results show that the strength of atmospheric systems, such as low-pressure systems and jet streams, determines the amount of rainfall. The study also finds that the predictability of these events is limited and that convective activities play a critical role in error growth.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Environmental Sciences
Yipeng Huang, Murong Zhang
Summary: Based on observations from the Himawari-8 satellite, this study compares the behavior of mesoscale convective systems (MCS) in two consecutive warm-sector rainfall episodes in southeastern China. The results indicate that MCS played a dominant role in the second episode, contributing to the majority of extreme rainfall, while their contribution was limited in the first episode. The study proposes two new indices, the overlap index (OLI) and merging potential index (MPI), which show that the MCS processes in the second episode were significantly different and had a greater impact on rainfall production compared to the first episode.