Interannual variations of synoptic-scale disturbance intensity over the tropical western North Pacific during boreal summer

Gu, Qinlu; Wu, Renguang; Cao, Xi

doi:10.1007/s00382-023-06663-4

Cited by 1 publication

(3 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2022) revealed that the enhancement of the ISO intensity over the TWNP is larger and located more eastward in EN developing summers compared to the reduction of the ISO intensity in LN developing summers. An asymmetric signal was also detected in the TWNP SSD intensity change by Gu, Wu, and Cao (2023) in an empirical orthogonal function mode of summertime SSD intensity variations.…”

Section: Introductionmentioning

confidence: 79%

“…We define the SSDs as variations on 3‐9‐day time periods as Wu et al. (2021) and Gu, Wu, and Cao (2023). We obtain the 3‐9‐day variations by subtracting a 9‐day running mean from a 3‐day running mean.…”

Section: Methodsmentioning

confidence: 99%

“…The CAM-5.2, the atmospheric component of the Community Earth System Model version CESM-1.1, is available from https://www2.cesm.ucar.edu/models/cesm1.1/cam/ (Hurrell et al, 2013). The model datasets are archived at https://doi.org/10.5281/zenodo.7614693 (Gu, Wu, Wang, & Zhu, 2023).…”

Section: Data Availability Statementmentioning

confidence: 99%

See 2 more Smart Citations

Diverse Impacts of ENSO on the Intensity of Tropical Western North Pacific Synoptic‐Scale Disturbances During Boreal Summer

Gu,

Wu,

Wang

et al. 2023

JGR Atmospheres

Self Cite

View full text Add to dashboard Cite

Present study analyzes diverse impacts of El Niño–Southern Oscillation (ENSO) on the intensity of synoptic‐scale disturbances (SSDs) over the tropical western North Pacific (TWNP) during boreal summer. Asymmetric changes in the SSD intensity are detected in El Niño (EN) and La Niña (LN) developing summers. The increase in the SSD intensity is larger and located more eastward in EN developing summers compared to the decrease in LN developing summers. The asymmetric SSD intensity changes are associated with an eastward shift of anomalous low‐level cyclone and mid‐level ascent during EN developing summers relative to opposite anomalies during LN developing summers. The above difference is attributed to zonally asymmetric anomalous equatorial central‐eastern Paciﬁc heating and cooling in EN and LN years. Sensitivity experiments with an atmospheric general circulation model illustrate that the major reason for asymmetric TWNP SSD intensity changes is the asymmetric atmospheric response to opposite sea surface temperature (SST) anomalies in EN and LN years. Comparisons between strong and moderate ENSO events show an obvious dependence of the SSD intensity change on the amplitude of EN, but not on the amplitude of LN. This indicates a stronger sensitivity to warmer SST than to colder SST. The enhancement of the TWNP SSD intensity is confined to a more westward longitude in Central than Eastern Pacific EN years with a comparable magnitude.

show abstract

Section: Introductionmentioning

confidence: 79%

Section: Methodsmentioning

confidence: 99%