DOI: 10.1029/2020GL086984
论文题名: Dynamic Sea Level Variability Due to Seasonal River Discharge: A Preliminary Global Ocean Model Study
作者: Piecuch C.G. ; Wadehra R.
刊名: Geophysical Research Letters
ISSN: 948276
出版年: 2020
卷: 47, 期: 4 语种: 英语
英文关键词: ocean modeling
; river discharge
; sea level
; seasonal cycle
Scopus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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159176
Appears in Collections: 气候变化与战略
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作者单位: Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Colorado College, Colorado Springs, CO, United States
Recommended Citation:
Piecuch C.G.,Wadehra R.. Dynamic Sea Level Variability Due to Seasonal River Discharge: A Preliminary Global Ocean Model Study[J]. Geophysical Research Letters,2020-01-01,47(4)