气候变化领域集成服务门户(CCPortal): Atmospheric mixed layer convergence from observed MJO sea surface temperature anomalies

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DOI	10.1175/JCLI-D-19-0351.1
	Atmospheric mixed layer convergence from observed MJO sea surface temperature anomalies
	Szoeke S.P.D.E.; Maloney E.D.
发表日期	2020
ISSN	0894-8755
起始页码	547
结束页码	558
卷号	33 期号:2
英文摘要	The Madden-Julian oscillation (MJO) dominates tropical weather on intraseasonal 30-90-day time scales, yet mechanisms for its generation, maintenance, and propagation remain unclear. Although surface moist static energy (MSE) flux is greatest under strong winds in the convective phase, sea surface temperature (SST) warms by;0.38C in the clear nonconvective phase of the MJO. Winds converging into the hydrostatic low pressure under warm air over the warm SST increase the vertically integrated MSE. We estimate column-integrated MSE convergence using a model of mixed layer (ML) winds balancing friction, planetary rotation, and hydrostatic pressure gradients. Small (0.3 K) SST anomalies associated with the MJO drive 7 W m22 net column MSE convergence averaged over the equatorial Indian Ocean ahead of MJO deep convection. The MSE convergence is in the right phase to contribute to MJO generation and propagation. It is on the order of the total MSE tendency previously assessed from reanalysis, and greater than surface heat flux anomalies driven by intraseasonal SST fluctuations. © 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmospheric temperature; Climatology; Heat flux; Hydraulics; Hydrostatic pressure; Submarine geophysics; Surface properties; Surface waters; Time measurement; Wind; Deep convection; Equatorial Indian Ocean; Madden-Julian oscillation; Moist static energy; Planetary rotation; Sea surface temperature (SST); Sea surface temperature anomalies; Surface heat fluxes; Oceanography; atmospheric dynamics; heat flux; Madden-Julian oscillation; mixed layer; sea surface temperature; surface flux; temperature anomaly; timescale; tropical meteorology; Indian Ocean; Indian Ocean (Equatorial)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171495
作者单位	Oregon State University, Corvallis, OR, United States; Colorado State University, Fort Collins, CO, United States
推荐引用方式 GB/T 7714	Szoeke S.P.D.E.,Maloney E.D.. Atmospheric mixed layer convergence from observed MJO sea surface temperature anomalies[J],2020,33(2).
APA	Szoeke S.P.D.E.,&Maloney E.D..(2020).Atmospheric mixed layer convergence from observed MJO sea surface temperature anomalies.Journal of Climate,33(2).
MLA	Szoeke S.P.D.E.,et al."Atmospheric mixed layer convergence from observed MJO sea surface temperature anomalies".Journal of Climate 33.2(2020).