Modern California current system and radiolarian responses to normal (anti-El Nino) conditions
Abstract
The modern California Current is a relatively wide, slow, southward flow of cold, low-salinity water subject to considerable seasonal upwelling and other seasonal and supraseasonal perturbations. The radiolarian fauna contained within these waters reflects the parameters and perturbations common to eastern boundary currents. Radiolarian faunas characteristic of the California Current (subarctic and transitional waters), the offshore gyre (North Pacific anticyclonic subtropical gyre), the eastern tropical Pacific, and underlying intermediate and deep waters have been documented and characterized. During normal (anti-El Nino) conditions within the California Current system, the following physical oceanographic changes (and their characteristic radiolarian responses) occur. Spring and summer are dominated by the strongest southerly flow of the California Current - with high-standing crops of subarctic and transitional radiolarians in the core of that current - whose core is seaward of the southern California continental borderland. Spring and summer are also periods of strongest upwelling, with deeper radiolarians appearing at or near the surface. During fall and into winter, the California Current slows and a coastal countercurrent, the Davidson Current, develops. Radiolarians indicate that a much reduced core of the California Current swings in over the southern California continental borderland, and that faunas from the south are broughtmore »
- Authors:
- Publication Date:
- Research Org.:
- Univ. of San Diego, CA
- OSTI Identifier:
- 6966451
- Report Number(s):
- CONF-8604187-
Journal ID: CODEN: AAPGB
- Resource Type:
- Conference
- Journal Name:
- Am. Assoc. Pet. Geol., Bull.; (United States)
- Additional Journal Information:
- Journal Volume: 70:4; Conference: American Association of Petroleum Geologist Pacific Section convention, Bakersfield, CA, USA, 16 Apr 1986
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; PROTOZOA; BASELINE ECOLOGY; SEASONAL VARIATIONS; CLIMATES; PACIFIC OCEAN; WATER CURRENTS; ANIMALS; CURRENTS; ECOLOGY; INVERTEBRATES; MICROORGANISMS; SEAS; SURFACE WATERS; VARIATIONS; 520100* - Environment, Aquatic- Basic Studies- (-1989); 580100 - Geology & Hydrology- (-1989)
Citation Formats
Casey, R E, Carson, T L, and Weinheimer, A L. Modern California current system and radiolarian responses to normal (anti-El Nino) conditions. United States: N. p., 1986.
Web.
Casey, R E, Carson, T L, & Weinheimer, A L. Modern California current system and radiolarian responses to normal (anti-El Nino) conditions. United States.
Casey, R E, Carson, T L, and Weinheimer, A L. 1986.
"Modern California current system and radiolarian responses to normal (anti-El Nino) conditions". United States.
@article{osti_6966451,
title = {Modern California current system and radiolarian responses to normal (anti-El Nino) conditions},
author = {Casey, R E and Carson, T L and Weinheimer, A L},
abstractNote = {The modern California Current is a relatively wide, slow, southward flow of cold, low-salinity water subject to considerable seasonal upwelling and other seasonal and supraseasonal perturbations. The radiolarian fauna contained within these waters reflects the parameters and perturbations common to eastern boundary currents. Radiolarian faunas characteristic of the California Current (subarctic and transitional waters), the offshore gyre (North Pacific anticyclonic subtropical gyre), the eastern tropical Pacific, and underlying intermediate and deep waters have been documented and characterized. During normal (anti-El Nino) conditions within the California Current system, the following physical oceanographic changes (and their characteristic radiolarian responses) occur. Spring and summer are dominated by the strongest southerly flow of the California Current - with high-standing crops of subarctic and transitional radiolarians in the core of that current - whose core is seaward of the southern California continental borderland. Spring and summer are also periods of strongest upwelling, with deeper radiolarians appearing at or near the surface. During fall and into winter, the California Current slows and a coastal countercurrent, the Davidson Current, develops. Radiolarians indicate that a much reduced core of the California Current swings in over the southern California continental borderland, and that faunas from the south are brought northward near the shore.},
doi = {},
url = {https://www.osti.gov/biblio/6966451},
journal = {Am. Assoc. Pet. Geol., Bull.; (United States)},
number = ,
volume = 70:4,
place = {United States},
year = {Tue Apr 01 00:00:00 EST 1986},
month = {Tue Apr 01 00:00:00 EST 1986}
}