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- Jin, YishuaiPeking University,Qingdao National Laboratory for Marine Science and Technology (author)
Seasonal Cycle of Background in the Tropical Pacific as a Cause of ENSO Spring Persistence Barrier
- Article/chapterEnglish2019
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- 2019
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- LIBRIS-ID:oai:lup.lub.lu.se:0876208f-ba1b-442d-8d9a-c33c3d154265
- https://lup.lub.lu.se/record/0876208f-ba1b-442d-8d9a-c33c3d154265URI
- https://doi.org/10.1029/2019GL085205DOI
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- Language:English
- Summary in:English
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- Statistical model results suggest that the declining growth rate from autumn to spring is the key to cause El Niño-Southern Oscillation (ENSO) spring persistence barrier (SPB). Using a dynamical approach, we develop the physical mechanisms responsible for ENSO SPB in the framework of recharge oscillator by adding a seasonally varying Bjerknes (BJ) stability index and linking it with ENSO growth rate. By decomposing BJ index, it is indicated that seasonal thermodynamic damping and thermocline positive feedback play an important role in determining the ENSO SPB. We further show that the increasing/decreasing upper-level cloud/low-level cloud and the deepening thermocline from autumn to spring are the main factors to control the SPB of ENSO. Our proposed mechanisms also have useful implications for the understanding of ENSO prediction.
Subject headings and genre
- NATURVETENSKAP Geovetenskap och miljövetenskap Meteorologi och atmosfärforskning hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Meteorology and Atmospheric Sciences hsv//eng
- Bjerknes stability index
- cloud
- El Niño-Southern Oscillation
- seasonal persistence barrier
- thermocline
Added entries (persons, corporate bodies, meetings, titles ...)
- Liu, ZhengyuOhio State University (author)
- Lu, ZhengyaoLund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science(Swepub:lu)zh8715lu (author)
- He, ChengfeiOhio State University (author)
- Peking UniversityQingdao National Laboratory for Marine Science and Technology (creator_code:org_t)
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- In:Geophysical Research Letters46:22, s. 13371-133780094-8276
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