Nuclear winter source-term studies. Volume 1. Ignition of silo-field vegetation by nuclear weapons. Technical report, 1 January 1985-1 February 1986

Technical Report · Sat Feb 01 04:00:00 EST 1986

OSTI ID:6283509

Bush, B W; Small, R D

Smoke produced by the ignition and burning of live vegetation by nuclear explosions has been suggested as a major contributor to a possible nuclear winter. This report considers the mechanics of live vegetation ignition by a finite-radius nuclear fireball. For specified plant properties, the amount of fireball radiation absorbed by a plant community is calculated as a function of depth into the stand and range from the fireball. The spectral regions of plant energy absorption and the overlap with the emitted fireball thermal spectra are discussed. A simple model for the plant response to the imposed thermal load is developed. First, the temperature is raised; the change depends on the plant structure, moisture content, and plant canopy. Subsequent energy deposition desiccates the plant and finally raises its temperature to the threshold ignition limit. Results show the development of a variable depth ignition zone. Close to the fireball, ignition of the entire plant occurs. At greater distances (several fireball radii) portions of the plant are only partially desiccated, and sustained burning is less probable. Far from the burst, the top of the stand is weakly heated, and only a small transient temperature change results. An estimate of the smoke produced by an exchange involving the U.S. missile fields shows that the burning of live vegetation only slightly increases the total nonurban smoke production.

• Research Organization: Pacific-Sierra Research Corp., Los Angeles, CA (USA)
• OSTI ID: 6283509
• Report Number(s): AD-A-203662/2/XAB; PSR-1628-SAN
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450202* -- Explosions & Explosives-- Nuclear-- Weaponry-- (-1989)
AEROSOLS
CANOPIES
CHEMICAL REACTIONS
COLLOIDS
COMBUSTION
DAMAGE
DEPOSITION
DEPTH
DIMENSIONS
DISPERSIONS
DOCUMENT TYPES
DRYING
ELECTROMAGNETIC RADIATION
EXPLOSIONS
FIREBALLS
IGNITION
NUCLEAR EXPLOSIONS
NUCLEAR FIREBALLS
NUCLEAR WEAPONS
NUCLEAR WINTER
OXIDATION
PLANTS
PRODUCTION
PROGRESS REPORT
RADIATIONS
RESIDUES
SMOKES
SOLS
THERMAL RADIATION
THERMOCHEMICAL PROCESSES
WEAPONS