Article
Meteorology & Atmospheric Sciences
Jinling Piao, Wen Chen, Shangfeng Chen
Summary: This study reveals a significant interdecadal change in the summer water vapor budget over Northeast Asia around the late-1990s, primarily influenced by a local anomalous anti-cyclone. The stationary component plays a dominant role in contributing to the total water vapor transport change, accounting for 84% compared to the transient component's 16%. The changes in water vapor budget are primarily attributed to the wind field change at the lower troposphere.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Pablo Fernandez, Marcelo Barreiro
Summary: Before the late 1980s, the influence of ENSO on rainfall over Uruguay was relatively weak and only affected the northern portion of the country. After the late 1980s, the ENSO signal became stronger and affected both the southern and northern portions of Uruguay.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Shuai Li, Jie Yang, Zhiqiang Gong, Junhu Zhao, Shaobo Qiao, Guolin Feng
Summary: This study investigates the interdecadal variation characteristics of the dominant mode of summer precipitation over East Asia-Northwest Pacific before and after the late 1990s, revealing the physical mechanism and its connection with regional ocean warming. The results show a significant dipole pattern between Yangtze River Basin and tropical NWP during the global ocean warming acceleration period compared to the slowdown period, with anomalous dipoles of low-level winds, geopotential height, and convection shifting westward and enhancing in the earlier period. Negative sea surface temperature anomalies in the tropical NWP are prominent during the acceleration period, leading to the change in Pacific-Japan Teleconnection and ultimately affecting summer precipitation in EA-NWP.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Wei Shang, Keqin Duan, Xuejuan Ren, Yuanyuan Guo, Weina Guan, Shuangshuang Li
Summary: This study investigates the interdecadal changes in the dominant mode of summer precipitation over the central-eastern Tibetan Plateau. It is found that the pattern has shifted from an opposite variation between southeastern and northeastern TP to an in-phase pattern. The change is primarily linked to the increasing sea surface temperature in the North Atlantic, South Atlantic, and Indo-Pacific warm pool.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Meteorology & Atmospheric Sciences
Renguang Wu, Yu Shi, Peijun Zhu, XiaoJing Jia
Summary: Around 1980, there was a significant change in the relationship between August precipitation in the Indochina Peninsula and sea surface temperature in the tropical Pacific. More precipitation occurred during La Niña years from 1959-1979, but during El Niño years from 1983-2003. This change is associated with changes in the evolution of sea surface temperature anomalies in the equatorial Pacific.
Article
Meteorology & Atmospheric Sciences
Yuanpu Li, Zhiping Wen
Summary: The study found that the interdecadal changes in the Pacific-North America and Western Pacific teleconnections have an impact on planetary waves and stratospheric sudden warmings. The combinations of PNA and WP showed different interdecadal changes before and after the 1980s, which may be related to the Pacific Decadal Oscillation (PDO).
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Meteorology & Atmospheric Sciences
Hyun-Ju Lee, Wonbae Jeon, Woo-Seop Lee, Hwa Woon Lee
Summary: This study found that the increasing trend of HPT in South Korea during the summer season was stronger than that of maximum, mean, and minimum temperatures from 1981 to 2018, with a sudden change between 2010-18. The results highlight the importance of the activity of the Western North Pacific Subtropical High (WNPSH) in the variability of HPT in South Korea, emphasizing the necessity of monitoring and predicting the location of WNPSH and understanding the mechanism influencing its movement under global warming for predicting and coping with extreme HPT.
JOURNAL OF CLIMATE
(2021)
Article
Environmental Sciences
Rongwei Liao, Ge Liu, Junming Chen, Lei Zhang
Summary: The Huaihe River basin in China is a economically developed region that is heavily impacted by rainfall anomalies, especially extreme rainfall events (EREs). This study examines the interdecadal changes in EREs and their contribution to the total summer rainfall in the region. The results show that the frequency of EREs, particularly long persistent extreme rainfall events (LPEREs), has significantly increased in recent decades, leading to a higher total summer rainfall. The study also identifies the atmospheric circulation patterns that contribute to the increase in EREs. Understanding these patterns can help mitigate the negative impacts of EREs on local ecosystems, agriculture, soil erosion, and societies.
Article
Meteorology & Atmospheric Sciences
Exavery Kisesa Makula, Botao Zhou
Summary: The study found that the recent decrease in March to May rainfall in Tanzania is mainly associated with the reduction of water vapour transport from the Indian Ocean, weakening of convective activities, and changes in sea surface temperatures.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Kun Xia, Lijuan Li, Yanli Tang, Bin Wang
Summary: This study investigates the impact of soil freezing-thawing processes on August rainfall in Southern China using a coupled land-atmosphere model. The results suggest that vertical moisture advection and its dynamic component play a crucial role in the long-term trends of August rainfall.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Meteorology & Atmospheric Sciences
XiaoJing Jia, Min Wang, QiFeng Qian, Renguang Wu
Summary: This study analyzed the interdecadal changes in the relationship between spring snow cover extent (SCE_CEE) over central-eastern Eurasia and surface air temperature (SAT) in the Northern Hemisphere. The results showed that positive anomalies in SCE_CEE are associated with a cooler Eurasia-warmer North America (CEWN) spring SAT pattern, which intensified from the first to the second subperiod.Various mechanisms, including energy budget analysis and atmospheric circulation anomalies, were investigated to understand the changes in this relationship. Positive SCE_CEE anomalies in the second subperiod had a significant cooling effect on the atmospheric column, leading to the formation of a hemispheric atmospheric wave pattern that contributed to the enhanced snow-CEWN SAT relationship.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Meteorology & Atmospheric Sciences
Lavinia Patara, Claus W. Boening, Toste Tanhua
Summary: Enhanced Southern Ocean ventilation in recent decades is suggested as a relevant modulator of ocean heat and carbon uptake changes. This study focuses on midlatitude ventilation changes in the Southern Ocean from the 1960s to the 2010s, showing a multidecadal fluctuation with a decrease until the 1980s-90s and subsequent increase. Wind stress is identified as the main driver of ventilation changes, while buoyancy forcing modulates its trend and decadal variability.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Yen-Chao Chiu, Fang-Ching Chien
Summary: This study investigates the characteristics and long-term trends of southwesterly flows around southern Taiwan during mei-yu seasons. The results show an increasing trend in the number of southwesterly flows over the 44-year period, with a decadal oscillation pattern. This trend poses a potential threat to Taiwan due to the increasing heavy rainfall associated with southwesterly flows events.
JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Shuping Li, Tao Su, Pengcheng Yan, Zhaohong Yang, Guolin Feng
Summary: This study finds that the relationship between the Pacific-Japan (PJ) pattern and ENSO shows a pronounced interdecadal change around 1997/1998. The structure of the PJ pattern changes, and the connection with summer precipitation undergoes a transition.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Rongwei Liao, Ping Zhao
Summary: By using rainfall data and reanalysis data, the study constructs the Asian-Pacific Oscillation (APO) index to investigate the interdecadal relationship between APO and rainfall in the Huai River basin of China. The results show an interdecadal shift in the APO index around the late 1990s, with a subsequent increase in frequency, intensity, and amount of extreme rainfall events in the region. This increase can be explained by atmospheric circulation anomalies, including an eastward shift of the subtropical high pressure and easterly wind anomalies over East Asia.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Yue Sun, Jianping Li, Hao Wang, Ruize Li, Xinxin Tang
Summary: The September rainfall over Northern China in 2021 was the heaviest since 1961 and had unprecedented socioeconomic impacts. The study found that the warm sea surface temperature anomalies over the tropical Atlantic, cold sea surface temperature anomalies over the tropical Pacific, Southern Annular Mode-like pattern in the Southern Hemisphere, and North Pacific Oscillation-like pattern in the Northern Hemisphere jointly strengthened the Indian monsoon and led to this rainfall event. Additionally, the extreme air acceleration in the east Asian upper-level jet entrance region played a crucial role.
Article
Meteorology & Atmospheric Sciences
Bolan Gan, Tianyu Wang, Lixin Wu, Jianping Li, Bo Qiu, Haiyuan Yang, Li Zhang
Summary: Through the study of short-term climate variations on a decadal scale, we found that the Kuroshio Extension system undergoes periodic changes between stable and unstable states. This variation is caused by a coupled ocean-atmosphere delayed oscillator, with the winter oceanic surface conditions and slow oceanic Rossby wave adjustment playing a key role.
JOURNAL OF CLIMATE
(2023)
Article
Materials Science, Biomaterials
Chenchen Zhao, Jianping Li, Huihua Cai, Dingwei Wu, Suwan Tao, Chaoran Pi, Lian Zhu, Na Xu, Tongcun Zhang
Summary: Chronic endometritis is a common gynecological disease caused by recurrent infections, and it is closely related to myositis, miscarriage, and infertility. Current clinical therapy lacks satisfactory treatment methods. Mesenchymal stem cell (MSC)-derived exosomes, which have promising immunomodulatory and tissue repair abilities, have been used to treat inflammatory diseases. This study proposes that exosomes derived from inflammation-stimulated MSCs have stronger inhibition ability for inflammation.
BIOMATERIALS SCIENCE
(2023)
Article
Environmental Sciences
Xuanliang Ji, Juan Feng, Jianping Li, Xingrong Chen
Summary: This study investigates the modulation of Indo-Pacific warm pool (IPWP) thermal conditions on the relationships between the Hadley circulation (HC) and different tropical sea surface temperature (SST) meridional structures. The study finds that the relationship between HC and tropical SST is suppressed in cold IPWP conditions, while it is equivalent to the climatology in warm IPWP conditions. This suppression is attributed to the association between the La Nina decay phase and significant equatorially asymmetric SST anomalies within the IPWP.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Agronomy
Yu Ru, Chenming Hu, Xuyang Chen, Fengbo Yang, Chao Zhang, Jianping Li, Shuping Fang
Summary: The study examines the interaction between the canopy of fruit trees, the airflow field, and the droplet penetration ratio using a mobile LIDAR system and wind tunnel experiments. The results show that wind velocity decreases during canopy penetration, with the lowest value at the back of the canopy. A quadratic exponential regression model is found to be the most accurate in predicting the droplet penetration ratio. This research provides valuable information for optimizing spraying parameters and improving pesticide utilization.
Article
Meteorology & Atmospheric Sciences
Jing Cao, Jianping Li, Yanjie Li
Summary: This paper investigates truncation and round-off errors in the numerical solution of the 1D advection equation using the Lax-Friedrichs scheme, and their accumulation in high temporal layers. The authors derive a new theoretical approximation formula for the upper bound of the total error, as well as theoretical formulas for the optimal grid size and time step. The reliability of the formulas is demonstrated through numerical experiments. Furthermore, the paper explores the relationship between the optimal time steps under different machine precisions and presents theoretical verification of the computational uncertainty principle under a fixed grid ratio.
ATMOSPHERIC AND OCEANIC SCIENCE LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Xuan Li, Ruiqiang Ding, Jianping Li
Summary: In this study, the local predictability of summer heatwave events in south China was investigated using the BNLLE method. The results showed the high predictability of summer temperature and the wide range of local predictability limits for major heatwave events. The error dynamics and regional dynamical information revealed the heterogeneous spatial distribution of error growth and limitations in heatwave forecasting in the northern regions of south China.
Article
Meteorology & Atmospheric Sciences
Hao Wang, Jianping Li, Fei Zheng, Fei Li
Summary: This study investigates the synergistic effect of the summer positive North Atlantic Oscillation (pNAO) and positive northwest Pacific (pNWP) sea surface temperature anomaly (SSTA) on the interannual variability of extreme heat events in central-eastern China (CEC). The results show that the two factors act synergistically in strengthening extreme heat events in the CEC through a series of atmospheric bridges. The pNWP SSTA increases the strength of pNAO, leading to a stronger eastward propagation of Rossby waves and an anomalous anticyclone over the CEC, resulting in extreme heat events.
Article
Meteorology & Atmospheric Sciences
Yazhou Zhang, Jianping Li, Yina Diao, Zhaolu Hou, Ting Liu, Bin Zuo
Summary: This study explores the role of perturbation potential energy (PPE) in the energetic connection between the South China Sea summer monsoon (SCSSM) and Indian Ocean dipole (IOD). Strong SCSSM leads to positive/negative energy conversion and corresponding ascending/descending motions over the western North Pacific (WNP) and southern Maritime Continent (SMC), which indicates the existence of regional Hadley circulation. This circulation-induced wind anomalies reduce the local sea surface temperature over the tropical southeastern Indian Ocean, thus influencing the development of the IOD.
Article
Geosciences, Multidisciplinary
Juan Feng, Xuanliang Ji, Jianping Li, Enye He
Summary: The impact of El Nino on the Hadley Circulation (HC) has been a topic of previous studies, but the results have been inconclusive. This study investigates how El Nino affects the HC during different stages of its cycle, resolving previous discrepancies among studies. The differences in tropical sea surface temperature (SST) during different stages of El Nino cause differences in SST meridional gradients, which determine the location of convergence and thus explain the different spatial structures of HC anomalies during El Nino development and decay years.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Jie-Hong Han, Jianping Li
Summary: A new inter-basin teleconnection analysis method is proposed to investigate the connection among global oceans comprehensively. The Australia Boundary Current Dipole (ABCD) is discovered, which shows a strong negative correlation between sea surface temperature (SST) along Leeuwin Current (LC) and East Australia Current (EAC). This new inter-basin air-sea coupled mode exhibits remarkable interannual variability. The anomalies in SST are mainly generated by anomalous Australia High inducing opposite surface winds along the coast, which in turn reinforce the wind anomalies by affecting the overlying atmosphere and regional pressure anomalies. The meridional ocean advections control the anomalous SST, indicating the essential role of coastal Bjerknes feedback. The kinetic energy analysis further demonstrates that ABCD represents the reverse variation pattern of LC and EAC.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Deyu Lu, Ruiqiang Ding, Quanjia Zhong, Jiangyu Mao, Qian Zou, Jianping Li
Summary: In this paper, a rapid intensification warning index (RIWI) based on the analog method is developed using information from the early period following TC formation. The potential application of RIWI is verified through a 10-year cross-validation and data from Hurricane Ida (2021). Results show that RIWI can efficiently discriminate between RI and non-RI storms and has a significant positive correlation with the lifetime maximum intensity (LMI) of the TCs. By using this index, an early warning can be issued similar to 30 hr before the onset of RI, which is much earlier than the predictions made using the probabilistic Statistical Hurricane Intensity Prediction System RI index. In addition, by using the RIWI as a predictor, the prediction of LMI provides an early estimate of TC severity.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Qi Tian, Ruiqiang Ding, Jianping Li
Summary: This study evaluates the simulations of the NTA mode and NTA-ENSO connection using CMIP5 and CMIP6 historical simulations. The results show that most models can reproduce the spatial pattern of the NTA mode reasonably, although there are some differences in the central values and position. Furthermore, the analysis indicates that the CMIP5/CMIP6 models have a large diversity in the NTA-ENSO connection, which may be attributed to their differences in simulating the spring climatological mean Atlantic ITCZ precipitation and spring-to-summer NTA SST persistence. The CMIP6 models perform better in simulating the NTA-ENSO connection compared to the CMIP5 models.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Meteorology & Atmospheric Sciences
Qin Hong, Juan Feng, Jianping Li
Summary: Based on observational data, this study investigates the effects of Central Pacific (CP) El Nino events on the relationship between the Hadley circulation (HC) and tropical sea surface temperature (SST) under different meridional structures. It is found that the variability of HC and SST, decomposed into equatorially symmetric and asymmetric components, shows decreased explained variances during CP El Nino events. The HC's response to SST under different meridional structures is suppressed, mainly due to the inhomogeneous variations of SST anomalies in the tropical eastern Pacific (EP), particularly with a greater amplitude in the north EP.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Meteorology & Atmospheric Sciences
Hao Wang, Ziguang Li, Jianping Li, Xiaopei Lin, Xiao-Tong Zheng, Lei Fan, Yu Zhang
Summary: The variability of tropical Atlantic sea surface temperature (SST) can impact the East Asian summer monsoon (EASM). The interannual EASM-TA relationship exhibits interdecadal variation modulated by the Interdecadal Pacific Oscillation (IPO). Understanding the IPO-modulated EASM-TA relationship helps better forecast EASM variability.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
