Article
Multidisciplinary Sciences
Hyun-Su Jo, Yoo-Geun Ham
Summary: This study shows that the impacts of the north tropical Atlantic (NTA) and subtropical northeast Pacific (SNP) on El Nino-Southern Oscillation (ENSO) are significantly increased under greenhouse warming. The degree of enhancement is closely linked between the two regions. A wetter mean state over the off-equatorial eastern Pacific is identified as a key driver of the enhanced impact. The increased joint impacts of the northwestern hemispheric precursors on ENSO lead to more extreme El Nino events and higher ENSO predictability under greenhouse warming.
NATURE COMMUNICATIONS
(2023)
Article
Geosciences, Multidisciplinary
Ko Tsuchida, Takashi Mochizuki, Ryuichi Kawamura, Tetsuya Kawano
Summary: This study clarifies the mechanisms of internally generated radiative feedbacks and their relationship with El Nino and Southern Oscillation (ENSO). The radiative feedbacks vary on interdecadal timescales according to the changes in the background sea surface temperature on the equatorial Pacific, which strengthens ENSO and the local Hadley circulation, resulting in enhanced negative feedback.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Juan A. Anel, Michael Garcia-Rodriguez, Javier Rodeiro
Summary: A study on the Fifth Coupled Model Intercomparison Project (CMIP5) models reveals limitations in code access and highlights the need for the climate modeling community to improve its code-sharing practices in order to comply with best practices and recent editorial publishing policies.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2021)
Article
Environmental Sciences
Peter Kuma, Frida A. -M. Bender, Alex Schuddeboom, Adrian J. McDonald, Oyvind Seland
Summary: Uncertainty in cloud feedbacks is a major limitation in climate projections. Evaluation and improvement of cloud simulation are essential for accurate climate models. This study uses a deep convolutional neural network to determine cloud types and finds a negative linear relationship between cloud type biases and climate sensitivity.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Multidisciplinary Sciences
Ji-Won Kim, Jin-Yi Yu, Baijun Tian
Summary: Previous studies have overemphasized the role of a strong El Nino in the formation of multi-year La Nina events. However, observational analyses reveal that most of these events do not require a preceding strong El Nino, but are influenced by the negative phase of the North Pacific Meridional Mode.
NATURE COMMUNICATIONS
(2023)
Article
Environmental Sciences
Sangwoo Lee, Hyo-Seok Park, Se-Yong Song, Sang-Wook Yeh
Summary: This study examines 40 different climate models and finds that Central Pacific El Nino events are associated with significant Arctic warming, while Eastern Pacific El Nino events are associated with cooling in the Barents-Kara Seas and Eurasian continent. These distinct Arctic and Eurasian temperature responses to two types of El Nino events are not clearly evident in reanalysis data, likely due to the small sample size of El Nino events since the satellite era.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Yuqiong Zheng, Shangfeng Chen, Wen Chen, Bin Yu
Summary: This study evaluated the ability of 35 climate models to reproduce the connection between boreal spring Arctic Oscillation (AO) and its following winter El Nino-Southern Oscillation (ENSO). Models with positive AO-ENSO correlations showed different climate feedback mechanisms in various seasons, while models with negative AO-ENSO connections failed to reproduce certain atmospheric anomalies over the North Pacific.
Article
Engineering, Marine
Xin Zhang, Kejian Wu, Rui Li, Shuai Zhang, Ruyan Zhang, Jin Liu, Alexander V. Babanin
Summary: This study analyzes the spatial and temporal distribution of ocean waves in the North Pacific and confirms the presence of an ENSO signal. The study also reveals the spatial distributions of swells and wind waves and their transport of signals to lower latitudes.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Meteorology & Atmospheric Sciences
Sambasivarao Velivelli, G. Ch. Satyanarayana, Jasti S. Chowdary, K. Koteswara Rao, Anant Parekh, C. Gnanaseelan
Summary: This paper investigates the delayed influence of El Nino on spring Surface Air Temperature (SAT) variability over India and assesses its predictability in coupled climate models. The study finds that El Nino exerts a strong influence on the spring SAT over Southern Peninsular India (SPI) at its decaying phase. The analysis suggests that this warming is mainly induced by an anomalous anticyclone, which reduces cloud cover and increases shortwave radiation at the surface, leading to a dry atmospheric column and dry soil moisture over the SPI region. The study also highlights the predictability of spring SAT over India based on the Asia-Pacific Economic Cooperation Climate Center (APCC) models.
Article
Meteorology & Atmospheric Sciences
Juan A. Fernandez-Granja, Ana Casanueva, Joaquin Bedia, Jesus Fernandez
Summary: The study evaluates state-of-the-art GCMs and finds an overall improvement in atmospheric circulation features, although this improvement is uneven across models and large frequency biases still exist for the main synoptic patterns. Some CMIP6 models show similar or worse results than CMIP5 counterparts, but consistent improvements have been found in most cases, indicating better capture of key synoptic conditions by the new models.
Article
Multidisciplinary Sciences
Thanh Le
Summary: Vegetation changes have broad effects on regional climate, carbon budget, water cycle, and ecosystems' productivity. This study examined the connections between El Nino-Southern Oscillation (ENSO) and vegetation, and found that ENSO's impacts on global vegetation may strengthen in the future.
SCIENTIFIC REPORTS
(2023)
Article
Geosciences, Multidisciplinary
Jie Feng, Tao Lian, Yihui Ding, Xichen Li, Cheng Sun, Dake Chen
Summary: Statistical analysis shows that the impact of the East Asian cold surge on El Nino depends on its type and the region it passes through. Only the eastern type passing through the Philippine Sea can efficiently trigger El Nino.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
S. Stevenson, K. M. Cobb, M. Merrifield, B. Powell, S. Sanchez, J. Nusbaumer, G. O'Connor, A. Atwood
Summary: This study investigates the reconstruction of El Nino events using oxygen isotopic records from tropical corals, and finds that ocean dynamics play a critical role in influencing the isotopic composition of corals and seawater.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Ting-Hui Lee, Jin-Yi Yu, Yong-Fu Lin, Min-Hui Lo, He-Ming Xiao
Summary: This study suggests that deforestation in the Maritime Continent may alter the complexity of El Nino-Southern Oscillation (ENSO), making it more complex and less predictable. The deforestation model increases the occurrences of certain types of ENSO events, potentially affecting ENSO's spatial pattern and temporal evolution.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Wei Chen, Dabang Jiang, Xianmei Lang, Zhiping Tian
Summary: The performance of CMIP5 and CMIP6 climate models in simulating weather regimes over East Asia is evaluated in this study. The results show that both generations of models can reasonably reproduce the circulation patterns of weather regimes but underestimate their intensities and occurrence frequencies while overestimating certain frequencies. Compared to CMIP5, CMIP6 models perform better in terms of overall performance and linear frequency trends.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
