Satellite infra-red images in the Agulhas Current System

1978 ◽  
Vol 25 (6) ◽  
pp. 543-548 ◽  
Author(s):  
T.F.W. Harris ◽  
R. Legeckis ◽  
D. van Forest
Keyword(s):  
Current System ◽  
Agulhas Current ◽  
Infra Red ◽  
Infra Red Images

scholarly journals The INALT family – a set of high-resolution nests for the Agulhas Current system within global NEMO ocean/sea-ice configurations

2019 ◽  
Vol 12 (7) ◽  
pp. 3329-3355 ◽  
Author(s):  
Franziska U. Schwarzkopf ◽  
Arne Biastoch ◽  
Claus W. Böning ◽  
Jérôme Chanut ◽  
Jonathan V. Durgadoo ◽  
...  
Keyword(s):  
High Resolution ◽  
Boundary Conditions ◽  
Current System ◽  
Western Boundary Current ◽  
Global Ocean ◽  
Western Boundary ◽  
Boundary Current ◽  
The South ◽  
Agulhas Current ◽  
Mesoscale Dynamics

Abstract. The Agulhas Current, the western boundary current of the South Indian Ocean, has been shown to play an important role in the connectivity between the Indian and Atlantic oceans. The greater Agulhas Current system is highly dominated by mesoscale dynamics. To investigate their influence on the regional and global circulations, a family of high-resolution ocean general circulation model configurations based on the NEMO code has been developed. Horizontal resolution refinement is achieved by embedding “nests” covering the South Atlantic and the western Indian oceans at 1/10∘ (INALT10) and 1/20∘ (INALT20) within global hosts with coarser resolutions. Nests and hosts are connected through two-way interaction, allowing the nests not only to receive boundary conditions from their respective host but also to feed back the impact of regional dynamics onto the global ocean. A double-nested configuration at 1/60∘ resolution (INALT60) has been developed to gain insights into submesoscale processes within the Agulhas Current system. Large-scale measures such as the Drake Passage transport and the strength of the Atlantic meridional overturning circulation are rather robust among the different configurations, indicating the important role of the hosts in providing a consistent embedment of the regionally refined grids into the global circulation. The dynamics of the Agulhas Current system strongly depend on the representation of mesoscale processes. Both the southward-flowing Agulhas Current and the northward-flowing Agulhas Undercurrent increase in strength with increasing resolution towards more realistic values, which suggests the importance of improving mesoscale dynamics as well as bathymetric slopes along this narrow western boundary current regime. The exploration of numerical choices such as lateral boundary conditions and details of the implementation of surface wind stress forcing demonstrates the range of solutions within any given configuration.

scholarly journals A Quick Method for the Texture Mapping of Meshes Acquired by Laser Scanner

2012 ◽  
Vol 9 ◽  
pp. 17-26 ◽  
Author(s):  
Francesco Gabellone ◽  
Ivan Ferrari ◽  
Francesco Giuri
Keyword(s):  
Laser Scanner ◽  
Morphological Characteristics ◽  
Texture Mapping ◽  
Operational Effectiveness ◽  
Quick Method ◽  
Simple Method ◽  
Infra Red ◽  
Different Types ◽  
Infra Red Images ◽  
False Colour

The methodology described in this article was developed in connection with two different projects and entails texture mapping by time-of-flight laser scanner. In order to verify its operational effectiveness and applicability to other contexts, sites with extremely different morphological characteristics were studied. The basic rationale of this simple method derives from the need to obtain different types of mapping – including RGB real colour images, infra-red images, false colour images from georadar scans, etc. – from the same scanned surface. To resolve this problem, we felt that the most appropriate step was to obtain a UVW mapping based on the high resolution real colour images and then use the samecoordinates to rapidly map the false colour images as well. Thus we fitted a device to the camera to determine its trajectory (similar to a gunsight); when scanned by the laser scanner in the same context as the monument, it makes it possible to know the exact coordinates of the viewpoint.

Weather Satellite Information for Offshore Industry

1982 ◽  
Vol 35 (3) ◽  
pp. 386-396
Author(s):  
R. M. Morris
Keyword(s):  
Linear Regression ◽  
Satellite Data ◽  
Geostationary Satellite ◽  
Temperature Profiles ◽  
Vertical Temperature ◽  
Satellite Information ◽  
Infra Red ◽  
Regression Techniques ◽  
Offshore Industry ◽  
Infra Red Images

The Meteorological Office makes full operational use of pictorial weather satellite data in preparation of routine analyses of the atmospheric fields of wind, temperature, pressure and humidity. There are two types of satellite, polar orbiting and geostationary: the polar orbiter scans the globe from a height of about 830 km and as the globe rotates beneath the satellite each area is scanned twice in 24 hours; the geostationary satellite rotates with the globe and takes frequent pictures of the same area from a height of about 35000 km.The pictorial data are in the form of visual and infra-red images and when used together can provide considerable information about the height, type and density of the clouds. Vertical temperature profiles within the atmosphere are also retrieved from polar orbiting satellites using linear regression techniques, but there are problems yet to be solved in areas of heavy cloud and precipitation. The paper was presented at Oceanology International 1982, held at Brighton.

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