Article
Meteorology & Atmospheric Sciences
Chiyu Zhao, Xin Geng, Wenjun Zhang, Li Qi
Summary: This study finds that the Atlantic multidecadal oscillation (AMO) can affect the El Nino-Southern Oscillation (ENSO). It shows that during a negative AMO phase, the atmospheric anomaly amplitudes in the tropical Pacific for El Nino events are more pronounced and for La Nina events are weaker, compared to a positive AMO phase. This discrepancy may be largely attributed to the decadal modulation of AMO.
JOURNAL OF CLIMATE
(2022)
Article
Multidisciplinary Sciences
D. T. Rodbell, R. G. Hatfield, M. B. Abbott, C. Y. Chen, A. Woods, J. S. Stoner, D. McGee, P. M. Tapia, M. Bush, B. L. Valero-Garces, S. B. Lehmann, S. Z. Mark, N. C. Weidhaas, A. L. Hillman, D. J. Larsen, G. Delgado, S. A. Katz, K. E. Solada, A. E. Morey, M. Finkenbinder, B. Valencia, A. Rozas-Davila, N. Wattrus, S. M. Colman, M. G. Bustamante, J. Kueck, S. Pierdominici
Summary: This study presents a continuous and independently dated archive of tropical glaciation spanning 700,000 years, using a piston core from Lake Junin. The research finds that tropical glaciers were influenced by changes in global ice volume with an approximately 100,000-year periodicity. An increase in the extent of tropical Andean glaciers relative to global ice volume occurred between 200,000 and 400,000 years ago, during sustained intervals of regionally elevated hydrologic balance that modified the regular approximately 23,000-year pacing of monsoon-driven precipitation. Millennial-scale variations in the extent of tropical Andean glaciers during the last glacial cycle were driven by variations in regional monsoon strength that were linked to temperature perturbations in Greenland ice cores.
Article
Meteorology & Atmospheric Sciences
Piyush Garg, Stephen W. Nesbitt, Timothy J. Lang, George Priftis
Summary: This study provides the first-ever observations of diurnal variations in oceanic convectively generated cold pools using the gradient feature method, revealing a bimodal distribution with deep, organized convective systems dominating in the morning and shallower, more isolated convection dominating in the afternoon. These findings can serve as a reference for high-resolution climate models to accurately simulate key processes in organizing convection and governing air-sea interactions.
JOURNAL OF CLIMATE
(2021)
Article
Geosciences, Multidisciplinary
Antoine Blanc, Juliette Blanchet, Jean-Dominique Creutin
Summary: This study analyzes the link between Western Europe large-scale circulation and precipitation variability in the Northern French Alps from 1950 to 2017. The maximum pressure difference and singularity of geopotential shapes are found to explain a significant part of precipitation variability, especially in winter.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Meteorology & Atmospheric Sciences
Suxiang Yao, Yishan Liu, Qian Huang
Summary: This study analyzes the propagation diversity of summer quasi-biweekly precipitation in the middle and lower reaches of the Yangtze River (MLYR) and finds that it exhibits obvious oscillation characteristics in this region. The frequency of southward events is significantly higher than that of northward or local oscillation events. Southward events show a wave train in the mid-high latitudes and propagate southward in East Asia, while northward and local oscillation events are closely related to the quasi-biweekly oscillation of the northwest Pacific. The meridional asymmetry of quasi-biweekly divergence and background wind is responsible for the diversity of quasi-biweekly oscillation propagation.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Yingxia Gao, Pang-Chi Hsu, Shaojing Che, Changwen Yu, Shiru Han
Summary: We investigated the characteristics and mechanisms of subseasonal precipitation variability in North China during the rainy season. Two dominant intraseasonal modes with periods of 8-20 and 30-60 days were identified, explaining 62.8% of the total precipitation variability. Most heavy rainfall events were observed with enhanced positive phases of biweekly or/and 30-60-day precipitation modes. The anomalous lower-level southerly perturbations and summer-mean thermal wind were found to be key factors causing these precipitation anomalies.
JOURNAL OF CLIMATE
(2022)
Article
Multidisciplinary Sciences
Sunyong Kim, Jae-Heung Park, Jong-Seong Kug
Summary: The record-breaking rainfall extremes in East Asia during summer 2020 can be explained by the teleconnections associated with the tropical origins among the Indian, Pacific, and Atlantic Oceans and their interbasin interactions.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Yurong Hou, Nathaniel C. Johnson, Chueh-Hsin Chang, Weijun Sun, Kai Man, Yujie Miao, Xichen Li
Summary: In recent decades, cold winters and springs over mid-latitude North America have been occurring frequently, contrary to the anthropogenic global warming trend. This study investigates the teleconnection between tropical oceans and North America, revealing that an anomalous tropical Atlantic warming can trigger a cold spring over central-western mid-latitude North America. The mechanisms revealed in this study have important implications for the predictability of cold springs over North America and various sectors such as agriculture, power supply, and public health.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Ho-Nam Cheung, Nour-Eddine Omrani, Fumiaki Ogawa, Noel Keenlyside, Hisashi Nakamura, Wen Zhou
Summary: Atmospheric blocking is important for extreme weather events, but current climate models underestimate its frequency, particularly around the North Atlantic. This study shows that the mid-latitude Pacific oceanic front plays a crucial role in climatological Atlantic blocking activity. The front strengthens the Pacific jet, which extends towards the North Atlantic, reinforcing the Atlantic circulation response and increasing Euro-Atlantic blocking.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Article
Meteorology & Atmospheric Sciences
Yuan-Ming Cheng, Stefan Tulich, George N. Kiladis, Juliana Dias
Summary: Observational evidence is presented for two extratropical pathways to forcing tropical convective disturbances. The first pathway involves resonance between the tropics and extratropics, leading to the excitation of equatorial waves. The second pathway involves the intrusion of midlatitude systems into the tropics, directly forcing tropical convection. This study highlights the importance of extratropical forcing in tropical circulations and its potential for improving weather predictions beyond 2 weeks.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Ori Adam, Alexander Farnsworth, Daniel J. Lunt
Summary: The variation of the tropical rain belt is largely driven by equatorial precipitation inhibition. The tropical modality is a fundamental characteristic of tropical climate, which is associated with the width of the rain belt and the meridional overturning circulation. Low modality regions exhibit monsoonal seasonal variations, while high modality regions have three independent seasonal modes of variation.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Amita Kumari, Pankaj Kumar
Summary: The Indian summer monsoon and its variations have a significant impact on the lives of people in the Indian subcontinent. This study examined changes in precipitation events during the active and break spells of the monsoon in the core monsoon zone from 1980 to 2019. It found that both the number and duration of active spells have increased in recent decades compared to the reference period, while break spells have also increased, albeit to a lesser extent. The study also highlights the important contributions of convective precipitation and reduced wind shear over the Bay of Bengal to enhanced precipitation during break spells.
Article
Meteorology & Atmospheric Sciences
Jie Jiang, Tianjun Zhou, Xiaolong Chen, Bo Wu
Summary: Central Asia is highly sensitive to changes in precipitation, with observed variations in precipitation over the past decades being related to tropical Pacific decadal variability and Atlantic multidecadal variability. These variations can affect precipitation over central Asia by influencing atmospheric circulation patterns in the region.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Emma Howard, Simon Thomas, Thomas H. A. Frame, Paula L. M. Gonzalez, John Methven, Oscar Martinez-Alvarado, Steven J. Woolnough
Summary: Two sets of weather patterns in Southeast Asia are presented and compared, showing the ability to capture different modes of tropical circulation variability. The study found that while the patterns can distinguish various climate modes effectively, there are still some modes that are not well captured. The weather patterns show promising potential in extending the useful forecast range for the risk of heavy precipitation.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2022)
Article
Meteorology & Atmospheric Sciences
Zunya Wang, Qiang Zhang, Shao Sun, Pengling Wang
Summary: Based on the standardized precipitation evapotranspiration index (SPEI), the number of drought days in China has significantly increased after the mid-1990s, mainly in the zonal belt from southern Xinjiang to southern Northeast China and North China. There is also a continuous increase in drought days in the meridional belt from eastern Northwest China to eastern Southwest China. The increase in drought days is closely related to the warming in the zonal belt and both temperature increase and precipitation decrease in the meridional belt.
JOURNAL OF CLIMATE
(2022)
Article
Environmental Sciences
Jian Ma, Gregory R. Foltz, Brian J. Soden, Gang Huang, Jie He, Changming Dong
ENVIRONMENTAL RESEARCH LETTERS
(2016)
Article
Geosciences, Multidisciplinary
Jie He, Brian J. Soden
GEOPHYSICAL RESEARCH LETTERS
(2016)
Article
Meteorology & Atmospheric Sciences
Jie He, Brian J. Soden
JOURNAL OF CLIMATE
(2016)
Article
Environmental Sciences
Jie He, Brian J. Soden
NATURE CLIMATE CHANGE
(2017)
Article
Meteorology & Atmospheric Sciences
Brian Soden, Eui-Seok Chung
JOURNAL OF CLIMATE
(2017)
Article
Meteorology & Atmospheric Sciences
Jie He, Michael Winton, Gabriel Vecchi, Liwei Jia, Maria Rugenstein
JOURNAL OF CLIMATE
(2017)
Article
Meteorology & Atmospheric Sciences
Shun-Nan Wu, Brian J. Soden
MONTHLY WEATHER REVIEW
(2017)
Article
Geosciences, Multidisciplinary
Eui-Seok Chung, Brian J. Soden
Article
Geosciences, Multidisciplinary
Jie He, Ben Kirtman, Brian J. Soden, Gabriel A. Vecchi, Honghai Zhang, Michael Winton
GEOPHYSICAL RESEARCH LETTERS
(2018)
Article
Meteorology & Atmospheric Sciences
Jie He, Nathaniel C. Johnson, Gabriel A. Vecchi, Ben Kirtman, Andrew T. Wittenberg, Stephan Sturm
JOURNAL OF CLIMATE
(2018)
Article
Meteorology & Atmospheric Sciences
Eui-Seok Chung, Brian J. Soden