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Meteorology & Atmospheric Sciences
Vijay Pottapinjara, Mathew Koll Roxy, M. S. Girishkumar, Karumuri Ashok, Sudheer Joseph, M. Ravichandran, R. Murtugudde
Summary: Recent studies have shown that the Atlantic zonal mode (AZM) significantly influences the Indian summer monsoon (ISM). The Coupled Forecast System version 2 simulates important aspects of the AZM-monsoon link, but some finer details are not captured due to mean state biases in the tropical Atlantic. Further improvement of the model's mean state in the tropical Atlantic is needed for better monsoon forecasts.
Article
Meteorology & Atmospheric Sciences
Pascal Oettli, Masami Nonaka, Masahiko Kuroki, Hiroyuki Koshiba, Yosuke Tokiya, Swadhin K. Behera
Summary: A new classification of the climate of Japan is proposed using the self-organizing map (SOM) technique. The study reveals that the surface air temperature (SAT) in Japan is mainly influenced by large-scale circulation systems, with distinct seasonal patterns observed in the winter and summer seasons.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Environmental Sciences
Zhiyi Zhao, Zhongda Lin, Fang Li, Brendan M. Rogers
Summary: This study comprehensively investigates the influence of summer leading large-scale atmospheric teleconnection patterns in the Northern Hemisphere extra-tropics on interannual variability of fires in the Arctic-boreal zone (ABZ). The results show that these teleconnection patterns significantly affect the burned areas across the ABZ, highlighting their important role in ABZ fires.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Xuya Ren, Li Zhang, Wenju Cai, Xichen Li, Chuan-Yang Wang, Yishuai Jin, Lixin Wu
Summary: Antarctic sea ice is influenced by sea surface temperature variability in the tropical Atlantic, especially prominent during austral autumn; meridional dipole SST anomalies in the tropical Atlantic generate stationary Rossby wave trains that induce atmospheric circulation anomalies, ultimately impacting sea ice concentration anomalies.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Shuai Hu, Bo Wu, Tianjun Zhou, Yongqiang Yu
Summary: The interannual variability of Tibetan Plateau summer climate has significant impacts on both regional hydrological cycles and global climate. This study identifies four dominant modes of summertime large-scale circulation over the Tibetan Plateau and surrounding areas. These modes are associated with ENSO-forced, ENSO-independent, summer North Atlantic Oscillation, and circumglobal teleconnection patterns.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Sharon E. Nicholson, Douglas Klotter
Summary: This study compares the characteristics of the Tropical Easterly Jet (TEJ) and upper-level winds in six reanalysis products, shows that CFSR and 20th Century Reanalysis overestimate wind speeds compared to other reanalyses, and suggests that changes in TEJ are not forced by rainfall but driven by large-scale factors. Potential mechanisms for a causal relationship between TEJ strength and high rainfall are discussed, with additional modeling efforts needed to determine the exact connection between TEJ and Sahel rainfall.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Environmental Sciences
Manal Hamdeno, Aida Alvera-Azcarate
Summary: This study investigated the characteristics of marine heatwaves (MHWs) in the Mediterranean Sea from 1982 to 2020 and examined their relationship with teleconnection patterns. The results showed that MHWs were more frequent and intense in the western Mediterranean Sea (WMB) than in the eastern Mediterranean Sea (EMB), while the duration of MHWs was longer in the EMB. There was an increasing trend in MHW frequency and duration in the Mediterranean Sea, and the East Atlantic Pattern (EAP) played an important role in modulating MHW frequency.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Meteorology & Atmospheric Sciences
Liming Zhou, Wenjian Hua, Sharon E. Nicholson, Joseph P. Clark
Summary: The study demonstrates the impact of the North Atlantic Oscillation (NAO) on the interannual temperature variability in the Sahara Desert. The results reveal a strong negative correlation between Sahara temperatures and the NAO index, indicating a teleconnection pattern. The study also identifies the spatial-temporal and vertical characteristics of this pattern, highlighting the role of horizontal temperature advection and vertical heat transfer in realizing the NAO footprint.
Article
Multidisciplinary Sciences
Tuantuan Zhang, Xingwen Jiang, Song Yang, Junwen Chen, Zhenning Li
Summary: By identifying two dominant modes of the South Asian summer monsoon, researchers have found predictable components and constructed a physical proxy index that can provide good forecasts one season in advance.
NATURE COMMUNICATIONS
(2022)
Article
Meteorology & Atmospheric Sciences
Tomoe Nakanishi, Yoshihiro Tachibana, Yuta Ando
Summary: Deep convection in the Sahel region may exert a remote influence on the climate of East Asia and beyond, potentially expanding our comprehension of teleconnections.
Article
Meteorology & Atmospheric Sciences
Yaoxian Yang, Yimin Liu, Zeyong Hu, Haipeng Yu, Jinxiao Li, Yongkun Xie, Qian Yang
Summary: This study investigates the structure, maintenance mechanism, and impact of the March Leading Eurasian Wave Train (LEWT) on the Tibetan Plateau (TP). The results show that the positive phase of LEWT leads to enhanced precipitation and moisture transport in the western TP, weakened precipitation and moisture transport in the southeastern TP, and pronounced surface air temperature warming due to the anomalous warm high located over the southeastern TP.
Article
Meteorology & Atmospheric Sciences
Hanjie Fan, Bohua Huang, Song Yang, Wenjie Dong
Summary: The study reveals that the Pacific meridional mode has a significant influence on the development of El Nino-Southern Oscillation events and their seasonal predictability. A matched PMM forcing enhances ENSO events, while a mismatched PMM forcing has a damping effect. The PMM acts as a modulator, rather than a trigger, for ENSO events, and its influence is modulated by the preconditioning of the upper-ocean heat content.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Tomoki Iwakiri, Masahiro Watanabe
Summary: This study aims to uncover the unified mechanisms of multiyear El Nino-Southern Oscillation (ENSO) using observations, CMIP6 models, and the RO model. The study finds that multiyear El Nino and La Nina events are roughly symmetric, with the exception of multiyear La Nina events following strong El Nino events. Anomalous ocean heat content (OHC) in the equatorial Pacific persists beyond the first peak, stimulating another ENSO event. The meridionally wide pattern of sea surface temperature anomalies observed during multiyear ENSO is responsible for the Ekman heat transport, and multiple factors modulate the ENSO meridional structure.
JOURNAL OF CLIMATE
(2022)
Article
Multidisciplinary Sciences
Somnath Mondal, Ashok K. Mishra, Ruby Leung, Benjamin Cook
Summary: This study utilizes Complex Network analysis to investigate the topological characteristics of global drought events, revealing a highly heterogeneous connectivity structure among drought hotspot regions. The co-occurrence of droughts in multiple continents suggests the possibility of simultaneous large-scale droughts.
NATURE COMMUNICATIONS
(2023)
Article
Meteorology & Atmospheric Sciences
Prasanth A. Pillai, Suryachandra A. Rao, Ankur Srivastava, D. A. Ramu, Maheswar Pradhan, Renu S. Das
Summary: The study demonstrates the significant role of tropical Pacific sea surface temperature biases in simulating both the mean and inter-annual variability of Indian summer monsoon rainfall.
