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About Me


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  1. Links Section In This Post, below the intro. I have been recently asked to start a thread, to talk about weather teleconnections and similar topics. This is often a topic not very well discussed on other weather places, and places like Twitter. We have a number of experts, enthusiasts, and meteorologists, who are knowledgeable in this area. So this is a thread for technical discussion about the teleconnections, etc, as well as a place for questions about these topics. We need to start talking about these climate drivers more, as they are the key to unlocking medium-long term forec
  2. ENSO Modulation of MJO Teleconnections to the North Atlantic and Europe Authors: R. W. Lee, S. J. Woolnough, A. J. Charlton‐Perez and F. Vitart Published online: 25th November 2019 Abstract: The teleconnection from the Madden‐Julian Oscillation (MJO) provides a source of subseasonal variability and predictability to the North Atlantic‐European (NAE) region. The El Niño‐Southern Oscillation (ENSO) modulates the seasonal mean state, through which the MJO and its teleconnection pattern propagates; however, its impact on this teleconnection to the NAE re
  3. The Global Wind Oscillation and its Impact on Southwest Michghan Severe Storms Authors: William Marino Published: 2016 (exact date not shown) Presentation Summary: • What is the Global Wind Oscillation (GWO) • Relating the GWO to Southwest Michigan severe storm events. • Trends in Severe storm frequency over Southwest Lower Michigan Link to presentation (slides only): https://www.weather.gov/media/grr/GLOM2015/Presentations/Marino_GWOSevereStorms.pdf I'm trying to find the full presentation and will edit
  4. On the Seasonality of the El Niño Teleconnection to the Amundsen Sea Region Authors: Yu Yeung Scott Yiu and Amanda C. Maycocka Published: 11th July, 2019 Abstract: The Amundsen Sea low (ASL) is a quasi-stationary low pressure system that affects climate in West Antarctica. Previous studies have shown that El Niño–Southern Oscillation (ENSO) modulates the position and strength of the ASL with the strongest teleconnection found in austral winter despite the amplitude of ENSO events generally being largest in austral autumn/summer. This study investigat
  5. On the Linearity of the Stratospheric and Euro-Atlantic Sector Response to ENSO Authors: Paloma Trascasa-Castro, Yu Yeung Scott YiuD and Jennifer K. Fletcher Published: 6th September, 2019 Abstract: The dependence of the winter stratospheric and Euro-Atlantic climate response on ENSO amplitude is investigated using the HadGEM3 model. Experiments are performed with imposed east Pacific sea surface temperature perturbations corresponding to Niño-3.4 anomalies of ±0.75, 1.5, 2.25, and 3.0 K. In the North Pacific, El Niño (EN) deepens and shifts the Aleu
  6. Dominant Covarying Climate Signals in the Southern Ocean and Antarctic Sea Ice Influence during the Last Three Decades Authors: D. Cerrone Published online: 6th April, 2017 Abstract: A composite dataset (comprising geopotential height, sea surface temperature, zonal and meridional surface winds, precipitation, cloud cover, surface air temperature, latent plus sensible heat fluxes, and sea ice concentration) has been investigated with the aim of revealing the dominant time scales of variability from 1982 to 2013. Three covarying climate signals associa
  7. Atmospheric Patterns over the Antarctic Peninsula Authors: Sergi Gonzalez, Fransisco Vasallo, Cayetana Recio-Blitz, Jose A. Guljarro and Jesus Riesco Published online: 4th April, 2018 Abstract: Using clustering analysis for the sea level pressure field of the ERA-Interim reanalysis between 1979 and 2016, five synoptic pressure patterns have been obtained for the Drake area and Antarctic Peninsula (AP) region (45°–75°S, 20°–120°W), and the resulting daily series has been made available to the scientific community. The five patterns have been named a
  8. The Climate of the Antarctic Peninsula during the Twentieth Century: Evidence from Ice Cores Authors: Elizabeth R. Thomas and Dieter R. Tetzner Published online: 5th November, 2018 Abstract: The Antarctic Peninsula (AP) is a region of special climatological interest. The late twentieth century has been a period of warming surface temperatures, enhanced mass loss from melting glaciers and increased snowfall, which have a direct and measurable impact on global sea levels. However, the observational period for Antarctica is short. Observational re
  9. The North Pacific Pacemaker Effect on Historical ENSO and Its Mechanisms Authors: Dillon J. Amaya Published online: 11th October, 2019 Abstract: Studies have indicated that North Pacific sea surface temperature (SST) variability can significantly modulate El Niño–Southern Oscillation (ENSO), but there has been little effort to put extratropical–tropical interactions into the context of historical events. To quantify the role of the North Pacific in pacing the timing and magnitude of observed ENSO, we use a fully coupled climate model to produce an en
  10. Role of Stochastic Atmospheric Forcing in Tropical Pacific Decadal Variability and ENSO Modulation - Presentation 98th American Meteorological Society Annual Meeting:, held in Austin, Texas from 6th to 11th January, 2018 Presenters: Tianyi Sun and Y. M. Okumura Presentation Date: 8th January, 2018 Summary: The analysis of a millennium-long control simulation of the Community Climate System Model version 4 (CCSM4) suggests that the amplitude and other properties of El Niño-Southern Oscillation (ENSO) vary sig
  11. Decadal Variability of the ENSO Teleconnection to the High-Latitude South Pacific Governed by Coupling with the Southern Annular Mode Authors: Ryan L. Fogt and David H. Bromwich Published: 15th March, 2006 Abstract: Decadal variability of the El Niño–Southern Oscillation (ENSO) teleconnection to the high-latitude South Pacific is examined by correlating the European Centre for Medium-Range Weather Forecasts (ECMWF) 40-yr Re-Analysis (ERA-40) and observations with the Southern Oscillation index (SOI) over the last two decades. There is a distinct annu
  12. The Interconnected Global Climate System—A Review of Tropical–Polar Teleconnections Authors: Xiaojun Yuan, Michael R. Kaplan, and Mark A. Cane Published: 29th June, 2018 Abstract: This paper summarizes advances in research on tropical–polar teleconnections, made roughly over the last decade. Elucidating El Niño–Southern Oscillation (ENSO) impacts on high latitudes has remained an important focus along different lines of inquiry. Tropical to polar connections have also been discovered at the intraseasonal time scale, associated with Madden–Juli
  13. The relationship between the El Niño/La Niña cycle and the transition chains of four atmospheric oscillations. Part I: The Four Oscillations Authors: Jingbei Peng, Lieting Chen and Qingyun Zhang Published: 8th February, 2014 Abstract: The first leading modes of the interannual variations in low-level circulation over the North and South Pacific are the Northern Oscillation (NO) and Southern Oscillation (SO), which are oscillations in sea level pressure anomalies (SLPAs) between the eastern and western Pacific Ocean. The second leading modes are the N
  14. The Teleconnection of El Niño Southern Oscillation to the Stratosphere Authors: Daniela I.V. Domeisen, Chaim I. Garfinkel and Amy H. Butler Published: 30th November, 2018 Abstract: El Niño and La Niña events in the tropical Pacific have significant and disrupting impacts on the global atmospheric and oceanic circulation. El Niño Southern Oscillation (ENSO) impacts also extend above the troposphere, affecting the strength and variability of the stratospheric polar vortex in the high latitudes of both hemispheres, as well as the composition and circula
  15. Weakening Atlantic Niño–Pacific connection under greenhouse warming Authors: Fan Jia, Wenju Cai, Lixin Wu, Bolan Gan, Guojian Wang, Fred Kucharski, Ping Chang and Noel Keenlyside Published: 21st August, 2019 Abstract: Sea surface temperature variability in the equatorial eastern Atlantic, which is referred to as an Atlantic Niño (Niña) at its warm (cold) phase and peaks in boreal summer, dominates the interannual variability in the equatorial Atlantic. By strengthening of the Walker circulation, an Atlantic Niño favors a Pacific La Niña, which
  16. A Teleconnection between the West Siberian Plain and the ENSO Region Authors: Stefan Liess, Saurabh Agrawal, Snigdhansu Chatterjee and Vipin Kumar Published: 19th December, 2016 Abstract: The Walker circulation is linked to extratropical waves that are deflected from the Northern Hemisphere polar regions and travel southeastward over central Asia toward the western Pacific warm pool during northern winter. The wave pattern resembles the east Atlantic–west Russia pattern and influences the El Niño–Southern Oscillation (ENSO) region. A tripole pattern
  17. Pacific decadal climate variability: Indices, patterns and tropical-extratropical interactions Authors: Benjamin J. Henley Published: 1st August, 2017 Abstract: Pacific decadal variability (PDV) plays a critical role in the climate system. Here I present a review of indices and patterns of decadal climate variability in the Pacific from observations and palaeoclimate reconstructions. I examine the spatial characteristics of Pacific sea surface temperature variability and the metrics used to track observations of PDV. I find commonalities between the P
  18. The role of the stratosphere in the European climate response to El Niño Authors: S. Ineson and A. A. Scaife First Published: 7th December, 2008 Abstract: El Niño/Southern Oscillation (ENSO) is the largest natural interannual climate signal in the tropics; oscillations between warm El Niño and cold La Niña phases occur every few years. The effects are felt not only in the centre of action, the tropical Pacific region, but around the globe. Observational studies show a clear response in European climate to ENSO in late winter. However, the underlying
  19. Review of Tropical‐Extratropical Teleconnections on Intraseasonal Time Scales Authors: Cristiana Stan, David M. Straus, Jorgen S. Frederiksen, Hai Lin, Eric D. Maloney and Courtney Schumacher First Published: 12th September, 2017 Abstract: The interactions and teleconnections between the tropical and midlatitude regions on intraseasonal time scales are an important modulator of tropical and extratropical circulation anomalies and their associated weather patterns. These interactions arise due to the impact of the tropics on the extratropics, the
  20. Relationship between Tropical Pacific SST and global atmospheric angular momentum in coupled models Authors: Huei−Ping Huang, Matthew Newman, Richard Seager, Yochanan Kushnir and Participating CMIP2+ Modeling Groups First Published: January 2004 Abstract: The sensitivity parameter S1 = ∆AAM/∆SST, where ∆AAM and ∆SST represent the anomalies of global atmospheric angular momentum (AAM) and tropical Pacific sea surface temperature (SST) in the NINO3.4 region, is compared for the CMIP2+ coupled models. The parameter quantifies the strength o
  21. Seasonal and Regional Variations of Long-Term Changes in Upper-Tropospheric Jets from Reanalyses Authors: Gloria L. Manney and Michaela I. Hegglin First Published: September 15th, 2017 Published on line: December 19th, 2017 Abstract: Long-term changes in upper-tropospheric jet latitude, altitude, and strength are assessed for 1980–2014 using five modern reanalyses: MERRA, MERRA-2, ERA-Interim, JRA-55, and NCEP CFSR. Changes are computed from jet locations evaluated daily at each longitude to analyze regional and seasonal variations.
  22. The key role of background sea surface temperature over the cold tongue in asymmetric responses of the Arctic stratosphere to El Niño–Southern Oscillation Authors: Fei Xie, Xin Zhou, Jianping Li, Cheng Sun, Juan Feng and Xuan Ma Published: Nov 2018 Abstract: The response of the Arctic stratosphere to El Niño activity is strong but the response to La Niña activity is relatively weak. The asymmetric responses of Arctic stratosphere to El Niño and La Niña events are thought to be caused by asymmetric El Niño–Southern Oscillation (ENSO) teleconnections. Her
  23. Studies of atmospheric angular momentum Authors: NOAA, Climate Diagnostics Center, Science Review Published: 25th/26th July, 2001 Chapter 4: Empirical and Process Studies Introduction to chapter 4, part 3: Atmospheric angular momentum (AAM) provides a convenient framework to study the role of mountains, surface wind stresses and various transport mechanisms in variability ranging from intraseasonal to interdecadal and beyond. Quantitative studies are feasible with current global assimilated datasets which show a good budget bala
  24. Where is ENSO stress balanced? Authors: Matthias Münnich and David Neelin First Published: 20th November, 2003 Published online: 14th April, 2004 Abstract: The zonal surface torque budget associated with the tropical wind stress anomalies during El Niño/Southern Oscillation is analyzed. Mountain and surface stress torques over South America are found to play a prominent role. Local momentum change is negligible for 6 month averages allowing the balance among regional contributions to the torque anomalies to be compared. During E
  25. Observed Changes in the Lifetime and Amplitude of the MJO Associated with Interannual ENSO Sea Surface Temperature Anomalies Authors: Benjamin Pohl and Adrian J. Matthews Published: 1st June, 2007 Abstract: The Madden–Julian oscillation (MJO) is analyzed using the reanalysis zonal wind– and satellite outgoing longwave radiation–based indices of Wheeler and Hendon for the 1974–2005 period. The average lifetime of the MJO events varies with season (36 days for events whose central date occurs in December, and 48 days for events in Sept
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