气候变化领域集成服务门户(CCPortal): Dynamic Sea Level Variability Due to Seasonal River Discharge: A Preliminary Global Ocean Model Study

CCPortal

DOI	10.1029/2020GL086984
	Dynamic Sea Level Variability Due to Seasonal River Discharge: A Preliminary Global Ocean Model Study
	Piecuch C.G.; Wadehra R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	River discharge R is an important driver of the coastal ocean circulation. However, the influence of variable R effects on large-scale sea level 휁 related to ocean dynamics is not well understood. We perform numerical experiments using a coarse (~ °) global ocean state estimate to quantify R effects on the seasonal cycle in dynamic 휁 over the global ocean. Forcing by R drives substantial dynamic 휁 signals (1 cm) on regional scales around major rivers (e.g., Amazon, Ganges, Brahmaputra, Irrawaddy, Ob, Lena, and Yenisei). Modeled 휁 changes largely reflect halosteric (salinity) effects, which are partly affected by transport processes involving planetary waves and advection. The modeled 휁 response to R is informative for interpreting 휁 observations from satellite altimetry and tide gauges, explaining 10–20% of the regional-scale seasonal data variance around some major rivers. Future 휁 studies should consider finer-resolution models and R forcing on nonseasonal time scales of relevance to climate. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate models; Digital storage; Rivers; Tide gages; Global ocean model; Numerical experiments; Ocean model; River discharge; Satellite altimetry; Sea level variability; Seasonal cycle; Transport process; Sea level; coastal zone; global ocean; river discharge; satellite altimetry; sea level change; seasonality; spatial resolution; tide gauge; Amazon River; Ayeyarwady
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170702
作者单位	Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Colorado College, Colorado Springs, CO, United States
推荐引用方式 GB/T 7714	Piecuch C.G.,Wadehra R.. Dynamic Sea Level Variability Due to Seasonal River Discharge: A Preliminary Global Ocean Model Study[J],2020,47(4).
APA	Piecuch C.G.,&Wadehra R..(2020).Dynamic Sea Level Variability Due to Seasonal River Discharge: A Preliminary Global Ocean Model Study.Geophysical Research Letters,47(4).
MLA	Piecuch C.G.,et al."Dynamic Sea Level Variability Due to Seasonal River Discharge: A Preliminary Global Ocean Model Study".Geophysical Research Letters 47.4(2020).