Rapid daily and sub-daily temperature variations in an urban environment

The foraging areas of Varanus gouldii were monitored by the spool-and-line technique over 51 consecutive days during October and November 1990 in Karrakatta Cemetery, Perth, Western Australia. The daily distance travelled by lizards varied markedly. The mean distance travelled was 111 -6m for days that varanids moved from their burrows. There was a weak positive correlation between the daily distance travelled and the maximum daily temperature and hours of daily sunshine. Some varanids moved their foraging areas from open unshaded sections of the cemetery into a more heavily treed area in November. The size of the daily foraging area for small varanids (<600g) was extremely variable (estimated median 300m*2); areas were greater in November than October. Some varanids moved to different foraging areas every few days.

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DAILY TEMPERATURE VARIATIONS AT THE SURFACE OF THE GROUND IN HOT ARID CLIMATES

Monthly Weather Review ◽

10.1175/1520-0493(1921)49<274:dtvats>2.0.co;2 ◽

1921 ◽

Vol 49 (5) ◽

pp. 274-276

Author(s):

PAUL RANGE

Keyword(s):

Daily Temperature ◽

Temperature Variations

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Observations of the spatial structure of interstellar hydrogen

Symposium - International Astronomical Union ◽

10.1017/s007418090010066x ◽

1967 ◽

Vol 31 ◽

pp. 45-46

Author(s):

Carl Heiles

Keyword(s):

High Resolution ◽

Spatial Structure ◽

Velocity Dispersion ◽

Temperature Variations

High-resolution 21-cm line observations in a region aroundlII= 120°,b11= +15°, have revealed four types of structure in the interstellar hydrogen: a smooth background, large sheets of density 2 atoms cm-3, clouds occurring mostly in groups, and ‘Cloudlets’ of a few solar masses and a few parsecs in size; the velocity dispersion in the Cloudlets is only 1 km/sec. Strong temperature variations in the gas are in evidence.

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Clean Electron Microscope Substrate Films Used for Micrometeorite Collection and Study

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100061847 ◽

1967 ◽

Vol 25 ◽

pp. 366-367

Author(s):

D. M. Davies ◽

R. Kemner ◽

E. F. Fullam

Keyword(s):

Thin Film ◽

Electron Microscope ◽

High Altitude ◽

Amyl Acetate ◽

Temperature Variations ◽

Film Forming ◽

Film Specimen ◽

Particulate Contaminants

All serious electron microscopists at one time or another have been concerned with the cleanliness and freedom from artifacts of thin film specimen support substrates. This is particularly important where there are relatively few particles of a sample to be found for study, as in the case of micrometeorite collections. For the deposition of such celestial garbage through the use of balloons, rockets, and aircraft, the thin film substrates must have not only all the attributes necessary for use in the electron microscope, but also be able to withstand rather wide temperature variations at high altitude, vibration and shock inherent in the collection vehicle's operation and occasionally an unscheduled violent landing.Nitrocellulose has been selected as a film forming material that meets these requirements yet lends itself to a relatively simple clean-up procedure to remove particulate contaminants. A 1% nitrocellulose solution is prepared by dissolving “Parlodion” in redistilled amyl acetate from which all moisture has been removed.

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