NDLI: Diagnosing vertical motion in the Equatorial Atlantic

Content Provider	Springer Nature Link
Author	Giordani, Hervé Caniaux, Guy
Copyright Year	2011
Abstract	Estimating the vertical velocity (w) in the oceanic upper-layers is a key issue for understanding the cold tongue development in the Eastern Equatorial Atlantic. In this methodological paper, we develop an expanded and general formulation of the vertical velocity equation based on the primitive equation (PE) system, in order to gain new insight into the physical processes responsible for the Equatorial and Angola upwellings. This approach is more accurate for describing the real ocean than simpler considerations based on just the wind-driven patterns of surface layer divergence. The w-sources/forcings are derived from the PE w-equation and diagnosed from a realistic ocean simulation of the Equatorial Atlantic. Sources of w are numerous and express the high complexity of terms related to the turbulent momentum flux, to the circulation and to the mass fields, some of them depending explicitly on w and others not. The equatorial upwelling is found to be mainly induced by the (i) the zonal turbulent momentum flux, (ii) the curl of turbulent momentum flux and (iii) the imbalance between the circulation and the pressure fields. The Angola upwelling in the eastern part of the basin is controlled by strong curl of turbulent momentum flux. A strong cross-regulation is evidenced between the w-forcings independent of w and dependent on w, which suggests an equatorial balanced-dynamics. The w-forcing depending on w represents the negative feedback of the ocean to the w-forcing independent of w: in the equatorial band, this adjustment is led by non-linear processes and by vortex stretching outside.
Starting Page	1995
Ending Page	2018
Page Count	24
File Format	PDF
ISSN	16167341
Journal	Deutsche Hydrografische Zeitschrift
Volume Number	61
Issue Number	12
e-ISSN	16167228
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-07-19
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Vertical velocity equation Vertical velocity sources Equatorial upwelling Oceanic upper-layers processes Environmental Monitoring/Analysis Fluid- and Aerodynamics Oceanography Meteorology/Climatology Geophysics/Geodesy
Content Type	Text
Resource Type	Article
Subject	Oceanography

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

A one-dimensional modeling study of the diurnal cycle in the equatorial Atlantic at the PIRATA buoys during the EGEE-3 campaign

Eastern boundary drainage of the North Atlantic subtropical gyre

Coastal upwelling along the north coast of Papua New Guinea and El Niño events during 1981–2005

JONSMOD 2008—guest editorial

Oceanic upwelling and downwelling processes in waters off the west coast of India

Monitoring estuaries using non-permanent stations: practical aspects and data examples

Bottom pressure tides along a line in the southeast Atlantic Ocean and comparisons with satellite altimetry

Multiparametric observation and analysis of the sea

The influence of meteorological variation on the upwelling system off eastern Hainan during summer 2007–2008

Diagnosing vertical motion in the Equatorial Atlantic

Similar Documents

A one-dimensional modeling study of the diurnal cycle in the equatorial Atlantic at the PIRATA buoys during the EGEE-3 campaign

Eastern boundary drainage of the North Atlantic subtropical gyre

Coastal upwelling along the north coast of Papua New Guinea and El Niño events during 1981–2005

JONSMOD 2008—guest editorial

Oceanic upwelling and downwelling processes in waters off the west coast of India

Monitoring estuaries using non-permanent stations: practical aspects and data examples

Bottom pressure tides along a line in the southeast Atlantic Ocean and comparisons with satellite altimetry

Multiparametric observation and analysis of the sea

The influence of meteorological variation on the upwelling system off eastern Hainan during summer 2007–2008

Diagnosing vertical motion in the Equatorial Atlantic