气候变化领域集成服务门户(CCPortal): Interannual variability of tropical Atlantic-to-Pacific moisture transport linked to ENSO, Atlantic Niño, and the freshwater budget in the northwestern tropical Atlantic

CCPortal

DOI	10.1175/JCLI-D-20-0728.1
	Interannual variability of tropical Atlantic-to-Pacific moisture transport linked to ENSO, Atlantic Niño, and the freshwater budget in the northwestern tropical Atlantic
	Yang J.-C.; Zhang Y.; Richter I.; Lin X.
发表日期	2021
ISSN	08948755
起始页码	4625
结束页码	4641
卷号	34 期号:11
英文摘要	Moisture transport from the Atlantic to Pacific is important for the basin-scale freshwater budget and the formation of meridional ocean circulation. Although the climatological tropical Atlantic-to-Pacific moisture transport (TAPMORT) has been well investigated, few studies have focused on its variability. Here we investigate the interannual variability of TAPMORT based on the atmospheric reanalysis datasets. The TAPMORT interannual variability is dominated by the variations of transbasin winds across Central America, and peaks in late boreal summer and late boreal winter. 1) In late summer, a developing El Niño and a mature Atlantic Niña set up an interbasin sea surface temperature (SST) gradient that strengthens the low-level jet across Central America and therefore TAPMORT (with weakened TAPMORT for opposite signed events). This process typically occurs from July to September, with a peak in August. 2) In late winter, the strengthened southern North American center of the Pacific–North American (PNA)-like pattern intensifies the TAPMORT variations. Although atmospheric interannual variability dominates these variations, extreme El Niño events are also important for the teleconnections. This process shows a single peak in February, in contrast to the persistent peak in late summer. We further demonstrate that the persistent TAPMORT variability in late summer dominates the moisture divergence over the northwestern tropical Atlantic and modulates freshwater flux there. Thus, our study improves the understanding of how TAPMORT interannual variability and the related interbasin SST gradient regulate the northwestern tropical Atlantic freshwater budget and the related salinity variability. © 2021 American Meteorological Society.
英文关键词	ENSO; Interannual variability; Moisture/moisture budget; Seasonal variability
语种	英语
scopus关键词	Atmospheric movements; Budget control; Moisture; Surface waters; Tropics; Atmospheric reanalysis; Freshwater fluxes; Interannual variability; Moisture transport; Ocean circulation; Salinity variability; Sea Surface Temperature gradients; Tropical atlantic; Oceanography
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/178546
作者单位	Frontiers Science Center for Deep Ocean Multispheres and Earth System and Physical Oceanography Laboratory, Ocean University of China, Qingdao, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Application Laboratory, Research Institute for Value-Added-Information Generation, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
推荐引用方式 GB/T 7714	Yang J.-C.,Zhang Y.,Richter I.,et al. Interannual variability of tropical Atlantic-to-Pacific moisture transport linked to ENSO, Atlantic Niño, and the freshwater budget in the northwestern tropical Atlantic[J],2021,34(11).
APA	Yang J.-C.,Zhang Y.,Richter I.,&Lin X..(2021).Interannual variability of tropical Atlantic-to-Pacific moisture transport linked to ENSO, Atlantic Niño, and the freshwater budget in the northwestern tropical Atlantic.Journal of Climate,34(11).
MLA	Yang J.-C.,et al."Interannual variability of tropical Atlantic-to-Pacific moisture transport linked to ENSO, Atlantic Niño, and the freshwater budget in the northwestern tropical Atlantic".Journal of Climate 34.11(2021).