Assessment of inter-annual and seasonal variability of the circulation over the shelf and slope off central Chile

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Identification_Information:

Citation:

Citation_Information:

Originator: Unknown

Publication_Date: Unknown

Title: Assessment of inter-annual and seasonal variability of the circulation over the shelf and slope off central Chile

Description:

Abstract:

Assessment of inter-annual and seasonal variability of the circulation over the shelf and slope off central Chile and the development of simple models of free and wind-forced trapped waves Hydrographic data together with current, sea level and wind time-series from several places along the west coast of South America were used to assess the temporal variability along this region. An important set of current meter data used here were obtained during an international study of the Humboldt Current system, as a contribution to the Joint Global Flux Study Project (JGOFS). The extension of this observational effort, supported in a second phase by the FONDAP-Humboldt programme, have allowed the completion of an 8 year record of moored current and temperature over the slope off Coquimbo, near 30S. A sister mooring, located about 500km south from Coquimbo, near 34 45'S, was maintained during October 1992 and July 1995 in order to study the alongshore propogation of current fluctuations. Time series of wind, sea-level and atmospheric pressure have been analysed and current records used to address the time variability at several scales over the slope off Chile. They encompass the moderate 1991-1992 and the strong 1997-1998 El Nino events and the 1995-96 and 1998 La Nina events. Interannual fluctuations of alongshore currents off 30S and seal level along the west coast of South America were analysed using a linear model forced by observed equatorial signal and regional wind stress. In addition, a wind-forced coastal trapped wave model was implemented and run. The circulation off Peninsula de Mejillones was analysed from hydrographic profiles and current-meters moored during January and July 1997.

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Published and In press

Supplemental_Information:

REFERENCE: Rutllant J., H. Fuenzalida, R. Torres, & D. Figueroa, 1998. Interaccion oceano-atmosfera-tierra en la region de Antofagasta (Chile, 23 degrees S) : Experimento DICLIMA (Land-air-sea interaction at the Antofagasta region (Chile, 23 degrees S): The DICLIMA experiment. Rev. Chil.Hist. Nat. 75:405-427.

Supplemental_Information:

REFERENCE: Shaffer, G., S. Hormazabal, O. Pizarro & S. Salinas, 1999. Seasonal and interannual variability of currents and temperature over the slope off central Chile. J. Geophys. Res. 104, 29951-29961.

Supplemental_Information:

REFERENCE: Pizarro, O., A. J. Clarke & S. Van Gorder. El Nino, sea level and currents along the South American coast. J. Phys. Oceanogr.

Supplemental_Information:

REFERENCE: Sobarzo, M., D. Figueroa & L. Djurfeldt. Upwelling of subsurface water into the rim of the Biobio submarine canyon as a response to surface winds. Cont. Shelf Res.

Supplemental_Information:

REFERENCE: Submitted

Supplemental_Information:

REFERENCE: Hormazabal, S., G. Shaffer, J. Letelier & O. Ulloa. Remote forcing of SST in the coastal upwelling system off Chile. J. Geophys. Res.

Supplemental_Information:

REFERENCE: Sobarzo, M. & D. Figueroa. The physical structure of a cold filament in an upwelling zone (Peninsula de Mejillones, Chile, 23 degrees S). Deep Sea Res.

Supplemental_Information:

REFERENCE: In preparation

Supplemental_Information:

REFERENCE: Figueroa, D., M. Sobarzo, S. Hormazabal, J. Rutllant. Modulation of the physical coastal environment of an upwelling region produced by remotely low frequency variability. Cont. Shelf Res.

Supplemental_Information:

REFERENCE: Thesis

Supplemental_Information:

REFERENCE: Pizarro, O., 1999. Low frequency fluctuations in the Eastern Boundary Current off South America: Remote and local forcing. Ph. D. Thesis, Goteborg University, Sweden, 1999.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -77.16

East_Bounding_Coordinate: -64.9

North_Bounding_Coordinate: -15.72

South_Bounding_Coordinate: -56.79

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: PROJECT

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > PRESSURE ANOMALIES

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SURFACE PRESSURE

Theme_Keyword: EARTH SCIENCE > OCEANS > COASTAL PROCESSES > LONGSHORE CURRENTS

Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > CONTINENTAL MARGINS > CONTINENTAL RISES/SLOPES

Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > CONTINENTAL MARGINS > CONTINENTAL SHELVES

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > BUOY POSITION

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > UPWELLING/DOWNWELLING

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > WATER MASSES

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > WIND-DRIVEN CIRCULATION

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CIRCULATION

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN PRESSURE > SEA LEVEL PRESSURE

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN WAVES > WAVE FREQUENCY

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN WAVES > WAVE PERIOD

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN WINDS > WIND STRESS

Theme_Keyword: EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > TELECONNECTIONS > EL NINO SOUTHERN OSCILLATION (ENSO) > ENSO

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > PELAGIC HABITAT

Theme_Keyword: GLOBEC > GLOBAL OCEAN ECOSYSTEM DYNAMICS, IGBP

Theme_Keyword: IGBP > INTERNATIONAL GEOSPHERE-BIOSPHERE PROGRAMME

Theme_Keyword: Chile

Theme_Keyword: Circulation

Theme_Keyword: Coastal-trapped Waves

Theme_Keyword: Current Meter Mooring

Theme_Keyword: El Nino

Theme_Keyword: Fondap-humboldt

Theme_Keyword: Globec

Theme_Keyword: Humboldt Current System

Theme_Keyword: La Nina

Theme_Keyword: Longshore Currents

Theme_Keyword: Sea Level

Theme_Keyword: Time Series

Theme_Keyword: Wind Stress

Theme_Keyword: BIOTA

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: ELEVATION

Theme_Keyword: OCEANS

Theme_Keyword: SPANISH

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN > HUMBOLDT CURRENT SYSTEM

Place_Keyword: CONTINENT > SOUTH AMERICA > CHILE

Access_Constraints: Not Available

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: RUBEN ESCRIBANO

Contact_Position: INVESTIGATOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: University of Antofagasta

Address: PO Box 170

City: Antofagasta

Country: Chile

Contact_Electronic_Mail_Address: rescribano@uantof.cl

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: UDEC/EBMD > Estacion de Biologia Marina-Dichato, Universidad de Concepcion, Chile

Contact_Person: PROF. VICTOR A GALLARDO

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Fondap-Humboldt Program Office

Address: Estacion de Biologia Marina-Dichato (EBMD)

Address: Universidad de Concepcion

City: Concepcion

Country: Chile

Contact_Voice_Telephone: +56 41 683247

Contact_Facsimile_Telephone: +56 41 683902

Contact_Electronic_Mail_Address: vgallar@udec.cl

Resource_Description: GLOBEC_038_CHL_002

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Not Available

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.udec.cl/carreras/bmarina.html

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20010806

Metadata_Review_Date: 20050419

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GLOBEC IPO

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: GLOBEC International Project Office

Address: Plymouth Marine Laboratory

Address: Prospect Place

City: Plymouth

Postal_Code: PL1 3DH

Country: UK

Contact_Voice_Telephone: +44 (0)1752 633401

Contact_Facsimile_Telephone: +44 (0)1752 633101

Contact_Electronic_Mail_Address: globec@pml.ac.uk

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time