Vietnam War: Forest Fire as a Military Weapon - Paperless Archives
Vietnam War: Forest Fire as a Military Weapon - Paperless Archives
Vietnam War: Forest Fire as a Military Weapon - Paperless Archives
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SECRET<br />
PERTINENT INCENDIARY DATA BY CLIMATIC TYPE<br />
The key to identification of each fire climate cl<strong>as</strong>s is shown in Table 5, page 35, of the text. The representative<br />
locations given for each cl<strong>as</strong>s are listed, from top to bottom, in order of decre<strong>as</strong>ing winter temperatures. In most c<strong>as</strong>es, the<br />
warmest location shown for a cl<strong>as</strong>s (for example, the first location for MI-HUSB) is very similar to the coolest location<br />
for another cl<strong>as</strong>s (the l<strong>as</strong>t location for FF- HUSB). Likewise, the wettest location is a cl<strong>as</strong>s (such <strong>as</strong> CL- HULB) often<br />
is similar to the driest in another cl<strong>as</strong>s (such <strong>as</strong> CL-HUSB).<br />
Descriptions of the fire climates by world climate cl<strong>as</strong>ses and by precipitation patterns are from Papadakis, footnote<br />
13. page 34, of the text.<br />
Humid months ("H"), dry months ("D"), and burn months ("B") are described on pages 34 to 37. Procedures for<br />
determining the (+) and (-) humidity values are on pages 29 to 31.<br />
In the graphs of climates at representative locations, the temperature and precipitation scales are adapted from the<br />
criteria of Bagnoulsiý The period of plant moisture stress corresponds closely with the time, or times of the year when<br />
the curve for average monthly precipitation lies below the curve for average monthly mean temperature.<br />
The date, or dates, recommended for herbicide applications at each location illustrated in Figures BI - B27 represent<br />
a satisfactory combination of air temperature and soil moisture, and allow maximum fe<strong>as</strong>ible time for dying and drying of<br />
vegetation before burning. At other locations having the same climate, some adjustments in treatment dates may be<br />
necessary to fit a somewhat different yearly weather pattern. The herbicide dosages should be incre<strong>as</strong>ed if treatments are<br />
to be applied under other than the most satisfactory weather conditions, <strong>as</strong> explained on pages 63 to 65 of the text.<br />
CLIMATE FF-HUYL<br />
FROSTFREE WINTER; HUMID YEARLONG<br />
All equatorial and frostfree tropical climates having no "D" months and no "B" months. Examples are:<br />
Precipitation No. of Months Yearly Humidity Values<br />
Location Pattern "H" "D '"B" () O<br />
Andagoya, Colombia Humid 12 0 0 +480 0<br />
Kuala Lumpur, Mal<strong>as</strong>ia Humid I1 0 0 +454 0<br />
Kieta, Bougainville I. Humid 12 0 0 +480 0<br />
Guam 1. Humid 9 0 0 +351 0<br />
San Juan, P.R. Humid I1 0 0 +431 0<br />
Entebbe, Uganda Humid I1! 0 0 +320 0<br />
Quang-Tri, R. V. N. Humid 7 0 0 +263 0<br />
Santos, Brazil Humid 12 0 0 +424 0<br />
rHamilton, Bermuda Humid 12 0 0 +416 0<br />
Temperature: Not limiting; allows growth of tender-leaved plants.<br />
Precipitation: Not limiting, except for short dry periods.<br />
Bagnouls (1957) Les climates biologiques et leur cl<strong>as</strong>sification. Ann. de Geographic, 66 (355): 193-220.<br />
[ SECRET