Subseasonal SST Variability in the Tropical Eastern North Pacific during Boreal Summer Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/3197xs064

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Boreal summer intraseasonal (30–90-day time scale) sea surface temperature (SST) variability in the east Pacific warm pool is examined using Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) sea surface temperatures during 1998–2005. Intraseasonal SST variance maximizes at two locations in the warm pool: in the vicinity of 9°N, 92°W near the Costa Rica Dome and near the northern edge of the warm pool in the vicinity of 19°N, 108°W. Both locations exhibit a significant spectral peak at 50–60-day periods, time scales characteristic of the Madden–Julian oscillation (MJO). Complex empirical orthogonal function (CEOF) and spectra coherence analyses are used to show that boreal summer intraseasonal SST anomalies are coherent with precipitation anomalies across the east Pacific warm pool. Spatial variations of phase are modest across the warm pool, although evidence exists for the northward progression of intraseasonal SST and precipitation anomalies. Intraseasonal SSTs at the north edge of the warm pool lag those in the vicinity of the Costa Rica Dome by about 1 week. The MJO explains 30%–40% of the variance of intraseasonal SST anomalies in the east Pacific warm pool during boreal summer. Peak-to-peak SST variations of 0.8°–1.0°C occur during MJO events. SST is approximately in quadrature with MJO precipitation, with suppressed (enhanced) MJO precipitation anomalies leading positive (negative) SST anomalies by 7–10 days. Consistent with the CEOF and coherence analyses, MJO-related SST and precipitation anomalies near the Costa Rica Dome lead those at the northern edge of the warm pool by about 1 week.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Maloney, Eric D., Dudley B. Chelton, Steven K. Esbensen, 2008: Subseasonal SST Variability in the Tropical Eastern North Pacific during Boreal Summer. Journal of Climate, 21, 4149–4167.
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2012-02-13T22:27:36Z (GMT). No. of bitstreams: 1 ChelsonDudleyB.CEOAS.SubseasonalSSTVariability.pdf: 2580927 bytes, checksum: 2040a6e3d2f7b6b988322404c6f3150c (MD5) Previous issue date: 2008-09
  • Vol. 21 no. 17.
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2012-02-13T22:27:36Z No. of bitstreams: 1 ChelsonDudleyB.CEOAS.SubseasonalSSTVariability.pdf: 2580927 bytes, checksum: 2040a6e3d2f7b6b988322404c6f3150c (MD5)
  • Journal of Climate

Relationships

In Administrative Set:
Last modified: 12/06/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items