scholarly journals Diurnal cycles of near‐surface currents across the tropical Pacific

2021 ◽  
Author(s):  
Jessica Masich ◽  
William S. Kessler ◽  
Meghan F. Cronin ◽  
Karen R. Grissom
Keyword(s):  
Tropical Pacific ◽  
Surface Currents ◽  
Near Surface ◽  
Diurnal Cycles ◽  
The Tropical Pacific

scholarly journals ENSO drives near-surface oxygen and vertical habitat variability in the tropical Pacific

2019 ◽  
Vol 14 (6) ◽  
pp. 064020 ◽  
Author(s):  
Shirley Leung ◽  
LuAnne Thompson ◽  
Michael J McPhaden ◽  
K A S Mislan
Keyword(s):  
Tropical Pacific ◽  
Surface Oxygen ◽  
Habitat Variability ◽  
Near Surface ◽  
The Tropical Pacific

scholarly journals Near-Surface Shear Flow in the Tropical Pacific Cold Tongue Front*

2009 ◽  
Vol 39 (5) ◽  
pp. 1200-1215 ◽  
Author(s):  
Meghan F. Cronin ◽  
William S. Kessler
Keyword(s):  
Turbulent Viscosity ◽  
Instability Wave ◽  
Surface Currents ◽  
Cold Tongue ◽  
Surface Shear ◽  
Near Surface ◽  
The Pacific ◽  
Geostrophic Shear ◽  
Moored Current Meters ◽  
The Tropical Pacific

Abstract Near-surface shear in the Pacific cold tongue front at 2°N, 140°W was measured using a set of five moored current meters between 5 and 25 m for nine months during 2004–05. Mean near-surface currents were strongly westward and only weakly northward (∼3 cm s−1). Mean near-surface shear was primarily westward and, thus, oriented to the left of the southeasterly trades. When the southwestward geostrophic shear was subtracted from the observed shear, the residual ageostrophic currents relative to 25 m were northward and had an Ekman-like spiral, in qualitative agreement with an Ekman model modified for regions with a vertically uniform front. According to this “frontal Ekman” model, the ageostrophic Ekman spiral is forced by the portion of the wind stress that is not balanced by the surface geostrophic shear. Analysis of a composite tropical instability wave (TIW) confirms that ageostrophic shear is minimized when winds blow along the front, and strengthens when winds blow oblique to the front. Furthermore, the magnitude of the near-surface shear, both in the TIW and diurnal composites, was sensitive to near-surface stratification and mixing. A diurnal jet was observed that was on average 12 cm s−1 stronger at 5 m than at 25 m, even though daytime stratification was weak. The resulting Richardson number indicates that turbulent viscosity is larger at night than daytime and decreases with depth. A “generalized Ekman” model is also developed that assumes that viscosity becomes zero below a defined frictional layer. The generalized model reproduces many of the features of the observed mean shear and is valid both in frontal regions and at the equator.

scholarly journals Tropical Pacific near-surface currents estimated from altimeter, wind, and drifter data

1999 ◽  
Vol 104 (C10) ◽  
pp. 23313-23326 ◽  
Author(s):  
Gary S. E. Lagerloef ◽  
Gary T. Mitchum ◽  
Roger B. Lukas ◽  
Pearn P. Niiler
Keyword(s):  
Tropical Pacific ◽  
Surface Currents ◽  
Near Surface

Diagnostic Model and Analysis of the Surface Currents in the Tropical Pacific Ocean

2002 ◽  
Vol 32 (10) ◽  
pp. 2938-2954 ◽  
Author(s):  
Fabrice Bonjean ◽  
Gary S. E. Lagerloef
Keyword(s):  
Pacific Ocean ◽  
Tropical Pacific ◽  
Diagnostic Model ◽  
Surface Currents ◽  
Tropical Pacific Ocean ◽  
The Tropical Pacific

scholarly journals Interannual variability of surface currents in the tropical Pacific during 1987-1993

1996 ◽  
Vol 101 (C2) ◽  
pp. 3629-3647 ◽  
Author(s):  
Claude Frankignoul ◽  
Fabrice Bonjean ◽  
Gilles Reverdin
Keyword(s):  
Interannual Variability ◽  
Tropical Pacific ◽  
Surface Currents ◽  
The Tropical Pacific

scholarly journals Intense surface currents in the tropical Pacific during 1996-1998

2001 ◽  
Vol 106 (C8) ◽  
pp. 16673-16684 ◽  
Author(s):  
Semyon A. Grodsky ◽  
James A. Carton
Keyword(s):  
Tropical Pacific ◽  
Surface Currents ◽  
The Tropical Pacific

Growing Coconut Palms in the Pacific Islands: Colliding Knowledge and Values

2020 ◽  
Author(s):  
Judith A. Bennett
Keyword(s):  
Pacific Islands ◽  
Social Values ◽  
Coconut Oil ◽  
Tropical Pacific ◽  
Experiential Knowledge ◽  
The West ◽  
Passive Resistance ◽  
The People ◽  
The Pacific ◽  
The Tropical Pacific

Coconuts provided commodities for the West in the form of coconut oil and copra. Once colonial governments established control of the tropical Pacific Islands, they needed revenue so urged European settlers to establish coconut plantations. For some decades most copra came from Indigenous growers. Administrations constantly urged the people to thin old groves and plant new ones like plantations, in grid patterns, regularly spaced and weeded. Local growers were instructed to collect all fallen coconuts for copra from their groves. For half a century, the administrations’ requirements met with Indigenous passive resistance. This paper examines the underlying reasons for this, elucidating Indigenous ecological and social values, based on experiential knowledge, knowledge that clashed with Western scientific values.

Fowler on Fishes of the Tropical Pacific

1901 ◽  
Vol 35 (412) ◽  
pp. 317-318
Keyword(s):  
Tropical Pacific ◽  
The Tropical Pacific
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