Micrometeorology in the Tropics *

Hales, Wayne B.

doi:10.1175/1520-0477-30.4.124

Cited by 14 publications

(9 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4 (top) shows that the temperature stratification of the forest was stable except in the evening. Similar temperature profiles were found in tropical forests by and by Hales (1949). Allee's (1926) data also showed stable temperature stratification during the day.…”

Section: Carbon Dioxide and Wind Environmentsupporting

confidence: 72%

“…Thus there was little resistance to wind flow in the middle layer. The wind profi!es reported by Hales (1949) are meaningless because speeds at the various heights were not obtained simultaneously. 4 show a distinct bulge or "blow-through" in this region.…”

Section: Carbon Dioxide and Wind Environmentmentioning

confidence: 99%

“…Baynton, Biggs, et al (1965) found it in a Colombian forest ·of vast horizontal extent. The wind profi!es reported by Hales (1949) are meaningless because speeds at the various heights were not obtained simultaneously. Allen ( 1968) attributed the bulge to gusts or dynamic pressure pulses penetrating the top canopy.…”

Section: Carbon Dioxide and Wind Environmentmentioning

confidence: 99%

“…In recent years investigators have studied extensively micrometeorological processes within crops and forests of temperate regions, e.g., Uchijima and Wright (1964), Monteith (1965), Lemon (1967), Allen (1968), Baumgartner (1969), and Denmead ( 1969). Some meteorological work in tropical rain forests has been reported (Allee 1926, Hales 1949, Baynton 1963, Baynton, Biggs, et al 1965, but most of the tropical rainforest studies have emphasized other ecological problems, e.g., Stocker (1935), Evans (1939), BUnning (1947), Richards (1952), MUller and Nielsen (1965), and Odum ( 1965). This paper emphasizes the nature of turbulence within a tropical rain forest and its interaction with other micrometeorological elements such as temperature and C0 2 concentration.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Environment of a Costa Rican Forest

Allen¹,

Lemon²,

Müller³

1972

Ecology

View full text Add to dashboard Cite

Wind speed and turbulence were measured at five heights simultaneously in a Costa Rican forest with non-stalling, heated-thermocouple anemometers. A persistent daytime stable thermal stratification of the air beneath the top canopy decreased small-scale turbulence, which may increase boundary-layer resistance of leaf-to-air transport of water vapor and C0 2 • Three C0 2 source layers (ground level, trunk space, and. above the top canopy) and two C0 2 sink layers (top canopy and bottom canopy) were found in this forest. Low nocturnal wind speed allowed C0 2 from respiration to accumulate at night. ATMOSPHERIC TRANSPORTAir motion is essential for bulk gaseous exchange between the earth's surface and the atmosphere be-'

show abstract

Section: Carbon Dioxide and Wind Environmentsupporting

confidence: 72%

Section: Carbon Dioxide and Wind Environmentmentioning

confidence: 99%

Section: Carbon Dioxide and Wind Environmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Environment of a Costa Rican Forest

Allen¹,

Lemon²,

Müller³

1972

Ecology

View full text Add to dashboard Cite

show abstract

“…Accounts of temperature and relative humidity in Lowland Rain Forest in South and Central America have previously been published for south Brazil (McLean 1919), Panama (Allee 1926;Hales 1949), the Guianas (Davis & Richards 1933;Carter 1934; beneath the uppermost in the canopy; this was found in practice by Brown (1919) in primary Lowland Rain Forest in the Philippines. The exact level in the canopy for which the clearing records are a useful indication will vary with the canopy structure, the height of the recorder, and the size, position and ground cover of the clearing.…”

Section: Introductionmentioning

confidence: 89%

A Comparison of Montane and Lowland Rain Forest in Ecuador: II. The Climate and its Effects on the Distribution and Physiognomy of the Forests

Grubb¹,

Whitmore²

1966

The Journal of Ecology

175

105

View full text Add to dashboard Cite

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. British Ecological Society is collaborating with JSTOR to digitize, preserve and extend access to Journal of Ecology. 304 Montane and lowland forest in Ecuador. II. Climate Schulz 1960), Trinidad (Pittendrigh 1948, 1950), Colombia (Bates 1944; Baynton et al. 1965) and Mexico (Goodnight & Goodnight 1956). Only Schulz (1960) published comprehensive data for extended periods; most of the other workers published only scattered data for odd days or very short periods and we cannot make very useful comparisons with their results. Records for single weeks in several situations in an Upper Montane Forest (ridges, ravines, etc.) have been published by Shreve (1914) for Jamaica. It appears that no record has been published for the forests in the Amazon basin or those on the Andes. Regarding the atmospheric conditions prevailing in montane forests, very few detailed studies have been published for any part of the tropics. Apart from Shreve (1914), only Brown (1919) has given a detailed quantitative account. It is desirable to have details of the microclimate both in the undergrowth, where all but the most light-demanding trees regenerate, and in the upper levels of the forest canopy, where the tallest species mature. We use 'canopy' to describe the sum total of the crowns of the trees of all heights and not in the sense of Richards (1952, p. 23) of a 'more or less continuous layer of tree crowns of approximately even height'. A knowledge of conditions in both situations is also needed in relation to epiphytes since these are found at all levels in the canopy at both our forest sites (Grubb et al. 1963). Ideally one should record temperature and relative humidity from a number of positions in each forest because one may expect various patterns in the distribution of their characteristics, rather as for penetration of rainfall (Hoppe 1896; Kittredge 1948; Hopkins 1965) or of radiation (Trapp 1938; Evans, Whitmore & Wong 1960). However, the amount of variation within the forests is likely to be much less than for, say, light characteristics because of air movements; Baynton et al. (1965) found a close correlation between temperatures on two 60 m towers 1100 m apart in level forest in Colombia. The variation is likely to be relatively unimportant in comparing the high forest phase of one forest with that of another.One may expect to be able to gain an indication of conditions in the upper part of the canopy from records taken in a clearing. Geiger (1961) has shown that one may expect from considerations of interception and loss of radiation a parallel between the uppermost part of the forest canopy and the soil or turf of a clearing; both are expected to be hotter by day and cooler by night tha...

show abstract

Temperature structure in and above a tropical forest

Baynton¹,

Hamilton²,

Sherr³

et al. 1965

Quart J Royal Meteoro Soc

View full text Add to dashboard Cite

SUMMARYA micrometeorological investigation in the tropical forest of north-western Colombia has provided new data on forest temperature profiles and the factors controlling the profile shape. The lapse rate above the forest canopy is a direct function of the increase in temperature between the surface and the canopy.The level of maximum temperature is not at the top of the canopy. Thus, the Colombian forest temperature profiles are unlike other forest profiles previously reported i n the literature.

show abstract

Micrometeorology in the Tropics *

Cited by 14 publications

References 3 publications

Environment of a Costa Rican Forest

Environment of a Costa Rican Forest

A Comparison of Montane and Lowland Rain Forest in Ecuador: II. The Climate and its Effects on the Distribution and Physiognomy of the Forests

Temperature structure in and above a tropical forest

Contact Info

Product

Resources

About