Accession Number:

AD0738423

Title:

Impact of Petroleum Spills on the Chemical and Physical Properties of the Air/Sea Interface.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

Report Date:

1972-02-16

Pagination or Media Count:

20.0

Abstract:

Reviewed are the natural forces operating on the oil slick to disperse its constituents into the marine environment. Weathering, dispersion, and airsea dynamics ultimately degrade the spill to tarlike lumps andor stable water-in-oil emulsions, both which have long lifetimes in the sea. Also discussed are how layers of petroleum oils and their attendant monomolecular films influence various properties of the airsea interface and modify exchange processes between the atmosphere and the ocean. Capillary waves are resisted and attenuated, and the interaction between wind and waves is uncoupled through the elimination of form drag. Gas exchange may be inhibited by oil films, but this effect does not occur to a serious extent in the open ocean. Liquid and solid exchange is altered, organic fallout is concentrated at the surface by the oil, and oil is transported into the marine atmosphere. Although an oil slick can damp its environment by slowing processes at the airsea interface and resisting interactions between the ocean and atmosphere, a worldwide ocean surface film, capable of global environmental impacts is deemed unlikely.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Water Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE