From observation to the quantification of snow processes with a time-lapse camera network

Abstract. A network of 45 spatially distributed time-lapse cameras was used to carry out a continuous observation of snow processes and snow cover properties throughout three mid-latitude medium elevation mountain catchments in hourly intervals during the winter seasons of 2010/2011 and 2011/2012. A simple technical modification was conducted to enable the deployment of the standard digital cameras in any location. Image analysis software was applied to extract information about snow depth, surface albedo and canopy interception from the digital images. Furthermore, the distributed design of the camera network made it possible to identify the elevation of the snow rain interface for any precipitation event which is very helpful for the interpretation of winter flooding events resulting from snow melt. Exemplary data for all these analyses is presented to show the potential fields of application of this innovative approach. Study results prove that the application of digital time-lapse photography is an appropriate technique to observe the spatial distribution and temporal evolution of seasonal snow covers in a mountainous environment.

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Applying a time-lapse camera network to observe snow processes in mountainous catchments

Hydrology and Earth System Sciences Discussions ◽

10.5194/hessd-9-10687-2012 ◽

2012 ◽

Vol 9 (9) ◽

pp. 10687-10717

Author(s):

J. Garvelmann ◽

S. Pohl ◽

M. Weiler

Keyword(s):

Time Lapse ◽

Precipitation Event ◽

Digital Cameras ◽

Camera Network ◽

Canopy Interception ◽

Mountainous Catchments ◽

Study Results ◽

Spatially Distributed ◽

Winter Flooding ◽

Flooding Events

Abstract. A network of 45 spatially distributed time-lapse cameras was used to carry out a continuous observation of snow processes and snow cover properties throughout three mid-latitude medium elevation mountain catchments in hourly intervals. A simple technical modification was conducted to enable the deployment of the standard digital cameras in any location. Image analysis software was applied to extract information about snow depth, surface albedo, and canopy interception from the digital images. Furthermore, the distributed design of the camera network made it possible to identify the elevation of the snow rain interface for any precipitation event for the interpretation of winter flooding events resulting from snow melt. Study results prove that the application of digital time-lapse photography is an appropriate technique to observe the spatial distribution and temporal evolution of seasonal snow covers in a mountainous environment.

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Use of time-lapse photography (GoProTM Cameras; GoPro, Inc., San Mateo, CA) to evaluate attractiveness of a novel fly bait in the field

10.1603/ice.2016.112879 ◽

2016 ◽

Author(s):

Katlyn L. Amos

Keyword(s):

Time Lapse ◽

Use Of Time ◽

Time Lapse Photography

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The Mechanism of Cell-division

Journal of Cell Science ◽

10.1242/jcs.s3-94.28.369 ◽

1953 ◽

Vol s3-94 (28) ◽

pp. 369-379

Author(s):

M. M. SWANN

Keyword(s):

Carbon Monoxide ◽

Cell Division ◽

Sea Urchin ◽

White Light ◽

Time Lapse ◽

Psammechinus Miliaris ◽

Energy Store ◽

Time Lapse Photography

1. Developing eggs of the sea-urchin Psammechinus miliaris were subjected to carbon monoxide inhibition, which was controlled by changing from green to white light. The behaviour of the eggs was recorded by time-lapse photography. 2. If inhibition is applied before the eggs enter mitosis, their first cleavage is delayed by a time which is roughly equal to the period of the inhibition. 3. If the inhibition is applied when the cells have already entered mitosis, they complete mitosis and cleave with little or no delay, but their second cleavage is delayed by a time which is roughly equal to the period of the inhibition. 4. It is suggested that the necessary energy for the second mitosis and cleavage is being stored up during the first mitosis and cleavage, and that this energy store operates like a reservoir which is continually being filled but siphons out when it is full. Once the energy has siphoned out, it carries mitosis and cleavage through, even though the reservoir is not filling up because of carbon monoxide inhibition.

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Steller watch - time-lapse photography system for remote steller sea lion sites

IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004 ◽

10.1109/igarss.2004.1368692 ◽

2004 ◽

Author(s):

A.B. Kulinchenko ◽

E.O. Rogers ◽

Y. Kopylova ◽

E. Olsen ◽

J. Andrews ◽

...

Keyword(s):

Time Lapse ◽

Steller Sea Lion ◽

Sea Lion ◽

Time Lapse Photography

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The determination of glacier speed by time-lapse photography under unfavorable conditions

Journal of Glaciology ◽

10.1017/s002214300000366x ◽

1992 ◽

Vol 38 (129) ◽

pp. 257-265 ◽

Cited By ~ 20

Author(s):

W.D. Harrison ◽

K.A. Echelmeyer ◽

D.M. Cosgrove ◽

C. F. Raymond

Keyword(s):

Time Lapse ◽

Systematic Errors ◽

Horizontal Motion ◽

Limited Information ◽

Glacier Surface ◽

Alaska Range ◽

Use Of Time ◽

West Fork ◽

Time Lapse Photography

AbstractTwo practical problems in the use of time-lapse photography for the measurement of speed were encountered during the recent surge of West Fork Glacier in the central Alaska Range, Alaska, U.S.A. The first is severe rotational camera instability; we show how natural, unsurveyed features on the valley wall can be used to make the necessary corrections. The second problem is the computation of absolute speed when many different, unsurveyed glacier-surface features are used as targets. We give a method for connecting the data obtained from different targets, and for determining the scale using limited information obtained by surveying. Severe systematic errors can occur unless the angle between the axis of the lens and the direction of horizontal motion is determined.

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Time-lapse photography of the β-Sn/α-Sn allotropic transformation

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-008-9739-5 ◽

2008 ◽

Vol 20 (4) ◽

pp. 386-391 ◽

Cited By ~ 15

Author(s):

D. Di Maio ◽

C. Hunt

Keyword(s):

Time Lapse ◽

Allotropic Transformation ◽

Time Lapse Photography

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Dynamin-related Protein Drp1 Is Required for Mitochondrial Division in Mammalian Cells

Molecular Biology of the Cell ◽

10.1091/mbc.12.8.2245 ◽

2001 ◽

Vol 12 (8) ◽

pp. 2245-2256 ◽

Cited By ~ 1052

Author(s):

Elena Smirnova ◽

Lorena Griparic ◽

Dixie-Lee Shurland ◽

Alexander M. van der Bliek

Keyword(s):

Mammalian Cells ◽

Fluorescent Protein ◽

Time Lapse ◽

Subcellular Fractionation ◽

Related Protein ◽

Direct Role ◽

Mitochondrial Division ◽

Transfected Cells ◽

Green Fluorescent ◽

Time Lapse Photography

Mutations in the human dynamin-related protein Drp1 cause mitochondria to form perinuclear clusters. We show here that these mitochondrial clusters consist of highly interconnected mitochondrial tubules. The increased connectivity between mitochondria indicates that the balance between mitochondrial division and fusion is shifted toward fusion. Such a shift is consistent with a block in mitochondrial division. Immunofluorescence and subcellular fractionation show that endogenous Drp1 is localized to mitochondria, which is also consistent with a role in mitochondrial division. A direct role in mitochondrial division is suggested by time-lapse photography of transfected cells, in which green fluorescent protein fused to Drp1 is concentrated in spots that mark actual mitochondrial division events. We find that purified human Drp1 can self-assemble into multimeric ring-like structures with dimensions similar to those of dynamin multimers. The structural and functional similarities between dynamin and Drp1 suggest that Drp1 wraps around the constriction points of dividing mitochondria, analogous to dynamin collars at the necks of budding vesicles. We conclude that Drp1 contributes to mitochondrial division in mammalian cells.

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Variation in the naturally occurring rhythm of the estuarine amphipod, Corophium volutator (Pallas)

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400071253 ◽

1983 ◽

Vol 63 (4) ◽

pp. 833-850 ◽

Cited By ~ 43

Author(s):

Walter F. Holmström ◽

Elfed Morgan

Keyword(s):

Activity Rhythm ◽

Time Lapse ◽

Early Summer ◽

Corophium Volutator ◽

Use Of Time ◽

Recording Conditions ◽

Free Running ◽

Endogenous Activity ◽

Free Running Period ◽

Time Lapse Photography

The endogenous activity rhythm of the estuarine amphipod Corophium volutator has been studied by direct observation and with the use of time lapse photography. The rhythm persists under constant conditions having a free running period of between 12 and 13 h, and with activity maxima occurring during the early ebb. Freshly collected animals show a rhythm which is modulated on a semi-lunar basis, the activity maxima being attenuated during the neap tide periods, and the rhythm has also been found to vary in definition throughout the year. The activity pattern is most clearly denned in early summer and autumn, the population becoming arrhythmic during the winter months. The rhythm is relatively unaffected by the ambient light intensity and temperature of the recording conditions, and is evident in all post-natal stages of development. The possibility of mutual entrainment is discussed.

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