Article
Meteorology & Atmospheric Sciences
Zixuan Zeng, Jianqi Sun
Summary: This study finds that a meridional tripolar sea surface temperature (SST) pattern over the tropical-North Pacific in February is closely related to the interannual variations in the frequency of spring extreme consecutive dry days (extreme-CDDs) over southern China (SC), independent from the El Nino-Southern Oscillation (ENSO) variability. The tripolar SST pattern can influence the variations of extreme-CDDs in SC through changes in atmospheric circulation patterns and the circulation in the tropical western Pacific.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Meteorology & Atmospheric Sciences
Xiaoli Wang, Xiyong Hou, Yijing Zhao
Summary: This study investigated the variations of consecutive dry days and consecutive wet days in the coastal area of China and their relationships with climate drivers. The results showed significant spatial and temporal patterns in these parameters, along with correlations with MEI and SOI. The findings are important for drought/flood disaster risk mitigation and water resources management in the coastal area of China.
ATMOSPHERIC RESEARCH
(2021)
Article
Geochemistry & Geophysics
Zixuan Zeng, Jianqi Sun
Summary: This study analyzed the variation characteristics of consecutive dry days with different durations in spring in China using statistical methods. The results showed significant regional differences in the changes of dry days, with some regions exhibiting notable decadal changes in drought conditions. The investigation provides more information on droughts at different time scales in China.
ATMOSPHERIC SCIENCE LETTERS
(2021)
Article
Nutrition & Dietetics
Kun Huang, Liyun Zhao, Qiya Guo, Dongmei Yu, Yuxiang Yang, Qiuye Cao, Xiaolin Yuan, Lahong Ju, Shujuan Li, Xue Cheng, Xiaoli Xu, Hongyun Fang
Summary: The study compared the performance of different forms of 24-hour dietary recalls in estimating dietary intake in Chinese adults. It found that three non-consecutive days of recall were more accurate than three consecutive days. Two non-consecutive days could also be used as a substitute to some extent. Using the National Cancer Institute method was more accurate than using the within-person mean method.
Article
Ecology
Natalia Hoyos, Alex Correa-Metrio, Carlos Jaramillo, Juan Camilo Villegas, Jaime Escobar
Summary: The transition between tropical savanna and humid forest is mainly influenced by the average duration of dry and wet spells and the interaction between these variables, with total monthly precipitation having a marginal effect. Dry spell duration has the largest effect on the probability of forest occurrence, decreasing by 7.5% for each additional consecutive dry day. Wet spell duration also impacts forest occurrence, increasing by 4.1% for each additional consecutive wet day.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Yankun Sun, Yufan Wang, Mengqi Zhang, Zixuan Zeng
Summary: Based on observation and simulation results, this study investigated the response of summer drought in Northeast China (NEC) to global warming. It was found that summer consecutive dry days in NEC increased in the past half century and experienced significant interdecadal changes. In the future warmer climate, NEC is projected to have interdecadal variability in summer consecutive dry days.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Meteorology & Atmospheric Sciences
Lirong Huang, Haibo Du, Yongcai Dang, Hong S. He, Risu Na, Zhengfang Wu
Summary: Changes in consecutive extreme precipitation (CEP) events between dry and wet regions of China have different impacts, with CEP frequency increasing faster in dry regions. The increase in precipitation intensity is the primary factor contributing to the increase in CEP events, but changes in the temporal clustering of daily extreme precipitation can either enhance or reverse these effects depending on the region.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Xuezheng Zong, Yunhe Yin, Tong Cui, Wenjuan Hou, Haoyu Deng
Summary: This study analyzed the features of consecutive extreme wet days (CEWDs) in China from 1980 to 2020 using observation data. It found that the frequency and intensity of CEWDs are related to local climate and exhibit a high eastern and low western spatial pattern in China. Since 1980, more than half of China's mainland has experienced an increase in both the frequency and intensity of CEWDs, except for some eastern coastal regions and southwest warm temperate humid/subhumid regions where a decreasing trend was observed. The ERA5 precipitation product outperforms the MSWEP data in detecting CEWD events, which underestimates the annual frequency and amounts of CEWDs. These findings provide valuable information for understanding and studying CEWD features in China and will assist policymakers in managing extreme precipitation-related hazards.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2023)
Article
Engineering, Civil
Zhuoran Luo, Jiahong Liu, Yongxiang Zhang, Jinjun Zhou, Yingdong Yu, Ruitao Jia
Summary: Evapotranspiration plays a crucial role in connecting land surface hydrological processes with the atmosphere, impacting regional water cycles and water balance. Urbanization has been shown to affect the hydrological balance, leading to urban wet and dry island effects. The study compared humidity levels in urban areas in China before and after rapid urbanization, and found that cold and dry urban areas tended to have wet island effects, while warm and humid urban areas had dry island effects. Coastal cities were exceptions, remaining dry islands throughout the year. Despite an overall trend towards increased dry island intensity, absolute humidity generally increased, especially during winter with some regions in northern China experiencing up to 8%-16% increases, attributed to intensifying urban heat island effects. These results provide valuable insights into understanding the drivers and mechanisms of dry/wet island effects in urban areas.
JOURNAL OF HYDROLOGY
(2021)
Article
Ecology
Yujiao Sun, Yujia Huang, Shangwei Xu, Jie Li, Meng Yin, Hezhong Tian
Summary: This study comprehensively analyzed the variations in the characteristics of the airborne bacterial community in Beijing over one year and found significant seasonal variations. Different seasons and pollution levels showed differences in the sources and dominant communities of atmospheric microorganisms.
Article
Environmental Sciences
Chenqin Lian, Chiwei Xiao, Zhiming Feng
Summary: This study provides a comprehensive analysis of the spatiotemporal characteristics and changes of active fires in China using MODIS C6 active fire products. Over the past two decades, the frequency of active fires in China has shown an overall rising and then falling trend, with significant spatial and temporal differences. Active fires are predominantly concentrated in the eastern region of China, particularly in the Northeast Plain, the North China Plain, the southeast hills, and the Yunnan-Kweichow Plateau. Moreover, different regions have different peak periods of active fire occurrence throughout the year. This research serves as a valuable reference for fire monitoring and control, particularly in terms of straw burning.
Article
Geosciences, Multidisciplinary
Zhiyan Zuo, Mingqian Li, Ning An, Dong Xiao
Summary: The research indicates that the two main modes of winter temperature in China are a spatially consistent pattern and a north-south dipole pattern. Global warming has led to an increase in extreme warm days and a decrease in extreme cold days in the spatially consistent pattern, with the Siberian High being a key factor influencing these temperature extremes.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Brigadier Libanda, Namwiinga Babra Nkolola
Summary: The Zambezi Riparian Region is a vital ecosystem, supporting about 40 million people who heavily rely on its water resources. However, the region is facing threats from extreme climate events, particularly an increased number of consecutive dry days, which impacts water availability. The study found that consecutive dry days exhibit periodic characteristics, mainly at the intra and interannual timescales. The southern vulnerable areas experience higher stress from consecutive dry days and require enhanced anticipatory actions.
PHYSICS AND CHEMISTRY OF THE EARTH
(2022)
Article
Plant Sciences
Chao Liang, Yimeng Li, Kunhao Zhang, Zhouzhou Wu, Jiaxin Liu, Junfeng Liu, Chanchan Zhou, Shu Wang, Fenghai Li, Guomin Sui
Summary: This study investigated grain production and plant characteristics associated with dry direct seeding rice, finding that high-yielding japonica rice cultivars had more spikelets per unit area, alleviating conflicts and improving productivity.
Article
Engineering, Geological
Hao Wu, Shuai Shao, Shengjun Shao, Shaoying Zhang, Zechi Wang
Summary: This study investigates the behavior of the dynamic shear modulus of undisturbed loess under dry-wet cycles and stress conditions. The findings show that the dry-wet cycles significantly affect the dynamic shear modulus, especially during the initial cycles. The relationship between N and G0/Pa/(σv/Pa)n is a power function, and G0/Pa/(σv/Pa)n decreases with increasing w1 and N. However, the fitting parameters a of the dynamic shear modulus ratio normalization model are not sensitive to σv/Pa, N, and w1. A damage degree prediction method considering N, w1, and σv is established based on the dynamic shear modulus.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
